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Personal Computer Family Service Information Manual - IBM

1. Ed Diskette Drive Switch Settings The following are the settings for positions 7 and 8 1 Drive 2 Drives 3 Drives 4 Drives I gt aS Iw LI gt jam Co _ T 2 Sa FI LJN Cow jC lc CoA poe ime joie ice oma WO L EE L WR L ER a oe L_ Cuj Dej jm EEF gt WN jc LEX40240 Memory Option Switch Settings 6160 PC XT with a 256Kb 640Kb system board Models 088 089 267 268 277 278 only PC XT With 256 640 System Board Note 1 Total Memory System Board Note 2 Switch Settings Note 7 The system board s identifier is located on its left edge Note 2 Memory adapters are not supported on 256 640K system boards a LEX41702 Chapter 6 5160 PC XT 6 5 Memory Option Switch Settings 5160 PC XT with a 64Kb 256Kb system board 288Kb Total Memory 32Kb 256Kb on System Board 64 256K Option 64K Option 32K Option Card Switches Card Switches Card Switches 1 32K option LEX40241 320Kb Total Memory 64Kb 256Kb on System Board 64 256K Option 64K Option 32K Option Card Switches Card Switches Card Switches 2 3 1 64 256K option with 64K installed a I hhli 1 64 256K option ta hh MO 2 32K options LEX40242 6 6 352Kb Total Memo 96Kb 256Kb on System Board 64 256K Option 64K Option 32K Option Card Switches Card Switches Card Switches 1 64 256K option with 64K installed 1 32K op
2. See Power Good Signal Figure 8 10 5162 Power Supply Output Connectors Battery The 5162 battery is a 6 volt life long lithium battery which is attached to the battery connector at the back of the system board The 5162 battery is considered a FRU part P N72X8498 which carries the one year warranty of the 5162 system unit The battery FRU part carries the normal go day parts warranty Chapter 8 5162 PC XT Model 286 8 5 When replacement of the battery is required follow the directions below e Power off the system e From the rear of the system unit remove the screw in the battery holder door e Replace the battery using caution to insert the battery in the correct position with the battery ter minals facing into the system unit Note 5162 System Units are shipped with the battery in the reserve position to prolong life expectancy of the battery Disregard the battery replacement instructions and part number provided in the 5162 Guide to Operations manual Section 3 Screw Battery Holder LEX42457 Figure 8 11 5162 Battery Location 5162 PC XT 286 Diagnostic Switch Setting Information Error Codes You might have an error code or an audio response during power on self test POST If you have both an error code and an audio error disregard the audio error and perform advanced diagnostics on the FRU indicated Power On Self Test The POST is initiated automatically with each power
3. The following adapters should not be installed together in the 5162 System Unit Synchronous Data Link Control SDLC e Alternate Binary Synchronous Communicatons Alt BSC Problems might occur in the system because of adapters that share the same interrupt level Check the adapter interrupt levels to be sure that they do not conflict If the adapters have selectable interrupt levels be sure their jumpers are not set for the same level Some options not supported by the IBM Personal Com puter XT Model are e Expansion Unit e AT 128Kb Memory Expansion LEX42454 e AT 512Kb Memory Expansion e AT 128Kb 640Kb Memory Expansion Figure 8 3 5162 System Unit Left Side View Cover e AT Fixed Disk and Diskette Drive Adapter Removed 256Kb Memory Expansion 64Kb 256Kb Memory Expansion 3 e 64Kb Memory Module Kit Lo e Full high diskette drives AT 30Mb Fixed Disk Drive e AT 20Mb Fixed Disk Drive e 10Mb fixed disk drive AT Prototype card e Diskette Drive Adapter LEX42651 ents ie Figure 8 4 5162 System Unit Memory Modules Professional Graphics Adapter and Display Game Control Adapter Color printer EDD 256Kb Memory Module Package 64Kb x 4 Memory Module Description Parity Module System Board 4 Battery Holder 5 Power Supply Speaker Assembly Base Frame Assembly 9 2 System Board The 640Kb System Board uses two 256Kb memory module packages and a 128Kb memor
4. In order to avoid such situations the model number of the machine being repaired should be known The model number can be determined by checking the bar code label located on the rear panel of the machine The 5170 model numbers 339 and 239 will be indicated on this label The absence of a model number on a 5170 indicates it is a Model 099 or 068 5170 System Information The following is a cross reference that will assist in identifying the correct replacement system board for base models of the Personal Computer AT The base models are 068 099 239 319 and 339 Chapter 9 5170 Personal Computer AT 9 21 Serial No FRU No BIOS Part Range No 8286112 068 6181028 099 6191029 1503107 1503108 1503109 1503110 6180957 6108958 6180959 6180960 6181024 6181025 6181026 6181027 6000000 6480170 6480090 6999999 6480091 6448894 6448895 6480090 6480091 000000 6489922 319 61X9265 999999 999 61X9266 62X0820 61X0821 Indicates a set of four BIOS modules Any numbers other than the ones listed above on BIOS modules in a Personal Computer AT are for the Model 239 Also there are two different system boards for this model P N6480170 large board and P N6480072 small board The BIOS modules sockets are located in positions U17 U27 U37 and U47 on the system board If the system board has four BIOS modules all sockets will be filled but if there are on
5. Minimum 200 Maximum 3 0 230VAC Maximum 240 Figure 9 7 5170 Input Protection Note The maximum in rush current is 100 A outputs The power supply provides 5 5 3 2 and 12V DC The following figure shows the load current and regu lation tolerance for the voltages Nominal Load Current A Regulation Output Minimum Maximum Tolerance 5 to 10 to 5 to 10 to Figure 9 8 5170 DC Load Requirements Note The power supply also supplies either 115V AC or 230V AC for the IBM Monochrome Display Output Protection If any output becomes overloaded the power supply will switch off within 20 milliseconds An overcurrent condition will not damage the power supply Dummy Load If no fixed disk drive is connected to the power supply a dummy load may be connected to P10 The dummy load is 5 ohms 50 watt resistor Output Voltage Sequencing Under normal conditions the output voltage levels track within 300 milliseconds of each other when power is applied to or removed from the power supply provided at least minimum loading is present No Load Operation No damage or hazardous conditions occur when primary power is applied with no load on any output level In such cases the power supply may switch off and a power on cycle will be required The power supply requires a minimum load for proper operation Power Good Signal The power supply provides a power good signal to indi cate pr
6. Switch LE X40106 Figure 4 23 DIP Slide and Rocker Switch Note The system board type 16Kb 64Kb CPU system board or 64Kb 256Kb CPU system board is printed on the left edge of the system board The following figures show switches on the system board These settings are necessary for the system to address the attached devices and to specify the amount of memory on the system board Switch Block 1 LEX40187 Switch Switch Position Function 7 8 Number of 5 25 inch diskette drives installed 2 Math coprocessor off if coprocessor is installed must be on if coprocessor is not installed 3 4 Amount of memory on the system board 5 6 Type of display adapters installed Note Total system memory includes memory options Switch Block 2 LAS Ao ofS LULL LEX40188 Switch Switch Position Function 2 3 4 5 Amount of memory options installed 6 7 8 Always in the off position Monitor Type Switch Settings The following shows the settings for positions 5 and 6 No Monitor or IBMEGA SWitch Block 1 Switch Block 2 either by itself or in eee ie Ne Da ne ee ae combination with another If FA O F E UU wu IBM Monochrome Display 1 and Printer Adapter l i a alone or in combination with an IBM Color or 2345678 er 2 40x25 Color RG WATCH ROD ui D AWUO HIGDON LEX40311 l OCU ie 345 67 80x25 Color Figure 4 24 Monitor Type Switch Settings Chapter 4 5150 PC 4 15 Diskett
7. 64K options 1 32K option 1 64 256K option with 128K installed 1 32K option 1234 Switch Block 1 il Wh 64 256K Option _ Card Switches i i 224Kb Total Memory 160Kb 64Kb on System Board LEX40203 Chapter 4 5150 PC 4 21 I 256Kb Total Memory 192Kb 64Kb on System Board System Board Switches eg 64 256K Option 64K Option 32K Option Card Switches Card Switches Card Switches 42345678 1 64 256K option with 192K installed N al i I I I i 1 64 256K option with 128K installed bab Ao 8 8 2 5345 7B 1 gt 64K option bd ebe RA 1 64 256K option with 64K installed 2 64K options 3 64K options 1 64 256K option with 128K installed 2 32K options LEX40204 4 22 288Kb Total Memory 224Kb 64Kb on System Board 1 System Board Switches Switch Block 1 Switch Block 2 H 64 256K Option 64K Option 32K Option Card Switches Card Switches Card Switches 1 64 256K option with 192K installed 1 32K option 1 64 256K option with 128K installed 1 64K option 1 32K option LEX40205 Chapter 4 5150 PC 4 23 320Kb Total Memory 256Kb 64Kb on System Board System Board Switches Switch Block 1 256K Option or 64 256K Option Card Switches 1 64 256K option with 128K installed 2 64K options 1 64 256K option with 192K installed 1 64K option 1 64 256K option with 192K installed 2 32K options 1 64 256K optio
8. LEX42345 Figure 1 2 3 5Inch Diskette Types The 3 5 inch diskette consists of a metal positive drive disk attached to the bottom of the circular magnetic recording surface This assembly is permanently encased in a hard plastic shell The 1Mb and 2Mb 3 5inch diskettes can be differentiated by examining the top surface of the plastic case The 2Mb 3 5inch diskette has the letters HD in the top upper right corner of the plastic case and a square opening on the top lower right corner The 1Mb 3 5inch diskettes have no such marking The slim compact size of the 3 5inch diskette and the permanent hard plastic shell in which it is encased provide easy transportability A metal shutter at the front of the diskette covers and protects the magnetic recording surface when the diskette is not in use When the diskette is properly inserted into the system metal shutter end first the shutter is opened automat ically to allow read or write activities A write protect sensor on the bottom of the plastic case can be posi tioned to protect the data stored on the diskette When the square opening on the top lower left corner of the diskette is open you can see through the hole the diskette is write protected and cannot be written The write protect interlock is located on the bottom right corner of the plastic shell It is important to note that some 3 5 inch diskettes con taining valuable programs such as system diagnostics will not ha
9. System On System Off Humidity System On System Off Altitude Heat Output Noise Level Electrical VA 450 Range 1 Nominal Minimum Maximum kva Range 2 Nominal Minimum Maximum kva Chapter 9 5170 Personal Computer AT 9 1 162 mm 6 8 in 540mm 21 3 in 439 mm 17 3 in 19 05 kg 42 Ib 1 8 m 6 ft 18 AWG 15 6 to 32 2 C 60 to 90 F 10 to 43 C 50 to 110 F 8 to 80 20 to 80 2133 6 m 7000 ft max 1100 BTU hr 42 dBa Meets Class 3 120V AC 104V AC 127V AC 6385 max 230V AC 200V AC 240V AC 0 575 max Figure 9 2 5170 Specifications Fixed Disk Drive Option Cards Diskette Drive Signal and Data Cable Control Panel Cable eee A li Battery Power F N Speaker Supply System Board LEX40086 9 3 5170 System Unit Rear View Cover Removed Figure 64Kb RAM Module Module LEX40087 Figure 9 4 5170 System Unit RAM Modules System Board The IBM Personal Computer AT system board uses an Intel 80286 Microprocessor that is generally compat ible with the Intel 8088 Microprocessor used in the rest of the IBM Personal Computers The system board expansion slots in the IBM Personal Computer AT have a 36 pin connector in addition to the 62 pin connector Adapters designed to make use of the 36 pin connector are not compatible with the rest of the IBM Personal Comp
10. 5155 PC and 5160 PC XT switch settings are same Chapter 6 5160 PC XT Diskette Drive System Unit Fixed Disk Drive Keyboard LEX40076 Figure 6 1 5160 PC XT The 5160 Personal Computer XT is an extended version of the 5150 Personal Computer A typical PC XT fea tures one 5 25 inch 360Kb diskette drive 256Kb memory Asynchronous Communications Adapter and a 10Mb or 20Mb fixed disk drive There are numerous configurations ranging from stand alone models to host interactive models Unit Specifications System Unit Size Height 142 mm 5 5 in Length 500 mm 19 6 in Depth 410 mm 16 1 in Weight 14 5 kg 32 lb Power Cable Length 1 83 m 6 ft Size 18 AWG Environment Air Temperature System On 15 6 to 32 2 C 60 to 90 F 10 to 43 C 50 to 110 F System Off Humidity System On System Off 8 to 80 20 to 80 Heat Output 750 BTU hr max 49 5 dBa System unit with monochrome display and expansion unit attached Noise Level Electrical Nominal Minimum Maximum kva 0 41 max 120V AC 104V AC 127V AC Figure 6 2 Part 2 of 2 5160 Specifications System Board Clock Chip System Expansion Trimmer Keyboard I O System Board Power Connections Auxiliary 64 256Kb CPU or El i P 256 640Kb CPU eneid i Intel 8088 Processor ROM BIOS ROM BASIC Up to 640Kb Read Write Bank 1 System Memory Configurati
11. 64K option 1 32K option 3 32K options 4 34 on System Board LEX40223 384Kb Total Memory 128Kb 256Kb on System Board 22345678 12345678 i System Board Switches Switch Block 1 i I i ii l l Switch Block 2 d i E JA i ii 64 256K Option 64K Option 32K Option Card Switches Card Switches Card Switches 64 256K option with 64K installed a y 36 728 64K option i t A 2 64K options 64 256K option with 64K installed 32K options 64K option 32K options LEX40224 Chapter 4 5150 PC 4 35 System Board Switches 64 256K option with 64K installed 64K option 32K option 416Kb Total Memory 160Kb 256Kb on System Board 64K options 32K option 64 256K option with 128K installed 32K option LEX40225 448Kb Total Memory 192Kb 256Kb on System Board Mn 12345678 i System Board Switches Switch Block 2 i I g i I d i 64 256K Option 64K Option 32K Option Card Switches Card Switches Card Switches 1 64 256K option with 64K installed 2 64K options 3 64K options 1 64 256K option with 128K installed 2 32K options LEX40226 Chapter 4 5150 PC 4 37 4 38 System Board Switches 1 64 256K option with 192K installed 1 32K option 1 64 256K option with 128K installed 1 64K option 1 32K option 480Kb Total Memory 224Kb 256Kb on System Board Switch Block 2 ia i i i hi if 32K
12. GROUND PIN 5 GROUND PIN 4 12V DC IBM Display Connector 5 25 Inch Diskette Drive Power Connectors Voltage Selector Switch On Off Power PIN 3 12V DC Switch Supply System Board PIN 2 KEY Fan Power Connectors Key PIN 1 PWR GOOD LEX40157 Figure 4 8 5155 Portable PC System Memory Diagnostic Tips Failing Memory Module Isolation There are times when diagnostics do not show when a memory problem is present on a machine If a cus tomer program or another diagnostic fails the fol lowing procedure may be helpful in identifying the failing memory module A failing memory module can be isolated by changing the configuration switch settings Each bank of memory modules is either 64Kb or 16Kb depending on the system board When a memory failure is detected reducing the size of memory by an entire bank can be achieved by changing the system configuration switches The following procedure should be used while running memory diagnostics 1 Configure the switch settings to reduce one bank of memory at a time until the memory error is no longer present 2 When the error is no longer present the last bank of modules eliminated is the failing bank 3 The failing module can be identified by config uring the machine back to the switch settings of the last failure Then swap out individual modules of the failing bank until the error goes away Potential Memory Module Problem on Adapter Cards Replace adap
13. Load the advanced diagnostics diskette go to the list of installed devices and copy that list 2 Examine the adapter cards installed in the system unit and expansion unit If any cards are located that are not on the list from Step 1 add them to the list 3 Sort the list into the following interrupt levels Note Some adapter cards have a jumper for interrupt selection For those cards and for cards not listed here including non IBM cards see the card s setup guide or technical specifications Due to rapid product announcements this list cannot describe all the available IBM PC option cards a Keyboard b Enhanced Graphics Adapter 3278 79 Emulation Adapter Primary PC Network Adapter c ALT ASYNC Communications Adapter COM2 ALT BISYNC Communications Adapter COM2 ALT Serial Parallel Adapter Serial Port ALT PC Network Adapter SDLC Communications Adapter PC Cluster Adapter selected by a jumper Chapter 9 5170 Personal Computer AT 9 9 Display Station Emulation Adapter selected by jumper d ASYNC Communications Adapter COM1 BISYNC Communications Adapter COM1 Serial Parallel Adapter Serial Port SDLC Communications Adapter e Fixed Disk Adapter except in Personal Com puter AT ALT Serial Parallel Adapter Parallel Port Display Station Emulation Adapter selected by a jumper f Diskette Drive Adapter g Printer Adapter Monochrome and Printer Adapter PC Cluster Adapter selected by a jumper Serial
14. SDLC and or DSEA parame ters are correct look at the system board to identify the processor module located in position U35 5150 or U28 5160 If the module is an AMD 8237 or 9517 look for the presence of a 74LS32 module in one of the following locations on the system board On the 5150 System Board the 74LS32 module will be located in position U101 or the spare position On the 5160 System Board the 74LS32 module will be located in position U90 or the spare position System boards without the 74LS32 module in one of the above locations and experiencing problems with DSEA should be replaced See ECA005 5150 5160 Based System Diagnostic Information For a Symptom to FRU Index and additional diagnos tics information refer to the Service Summary cards supplied with this manual 5150 PC Switch Settings Switches in your system are set to reflect the addition of memory and other installed options Switches are located on the system board Extender card and memory expansion options The switches are dual in line package DIP switches and are easily set with a ballpoint pen Refer to the charts on the following pages to determine the correct switch settings for your system Slide DIP switches are set by sliding the switch with a ballpoint pen while rocker switches are set by pressing the rocker to the desired position as shown in Figure 4 23 ae SN27 0786 00 21 July 1989 to SA38 0037 00 Ballpoint
15. The Service Summary Cards should be inserted into the plastic Summary Card Holder e Plastic Diskette Holders should be inserted in Chapter 20 Advanced Diagnostic Diskettes The Advanced Diagnostic Diskettes should be inserted in the plastic Diskette Holders The assembled manual should then be placed in the three ring binder provided with this package oe Safety The following information has been included in this publication for the use and safety of IBM personnel General Safety during Work Use these rules to ensure general safety Observe good housekeeping in the area of the machines during maintenance and after completing it Use only field supply items such as adhesives cleaning fluids lubricants paints and solvents that have been approved by IBM that is are sup plied under an IBM part number ea When lifting any heavy object 1 Ensure that you can stand safely without slip ping 2 Balance the weight of the object between your two feet 3 Use a slow lifting force Never move suddenly or twist when you attempt to lift 4 Lift by standing or by pushing up with your leg muscles this action removes the strain from the muscles in your back Do not attempt to lift any objects that you think are too heavy for you Do not perform any action that causes hazards to the customer or that makes the equipment unsafe e Put removed covers and other parts in a safe place away from all person
16. Unit Specifications Neve System Unit Size Height 162 mm 6 8 in Length 540 mm 21 3 in Depth 439 mm 17 3 in Weight 19 05 kg 42 lb Power Cable Length 1 8 m 6 ft Size 18 AWG Environment Air Temperature System On 15 6 to 32 2 C 60 to 90 F System Off 10 to 43 C 50 to 110 F Humidity System On 3 to 80 System Off 20 to 80 Altitude 2133 6 m 7000 ft max Heat Output 1100 BTU hr Noise Level 42 dBa Meets Class 3 Electrical VA 575 S Range 1 Nominal 120V AC Minimum 104V AC Maximum 127V AC Range 2 Nominal 230V AC Minimum 200V AC Maximum 240V AC Figure 9 47 5170 AT 370 Specifications Ne PC 370 P2 Card LEX40133 Figure 9 48 PC 370 P2 Card The PC 370 P2 card is the center of the S 370 oper ations for the PCAT 370 The PC 370 P2 card contains the microprocessors and control circuits that enable the PCAT 370 to execute S 370 instructions 3278 79 Emulation Adapter Option 5 Retaining Bracket Front we lt Coaxial Cable Connector LEX40134 Figure 9 49 IBM Personal Computer 3278 79 Emu lation Adapter The 3278 79 Emulation Adapter allows the PCAT 370 to emulate a 3278 79 terminal when the PCAT 370 is linked to a host system This card also allows addi tional functions to those of the 3278 79 when supported with suitable software These additional functions include the ability to print single screens complete listings or other files on the Personal Computer
17. the keyboard sends a make code for that key to the keyboard controller When the key is released its break code is sent the break code for a key is its make code preceded by hex FO All keys are typematic When a key is pressed and held down the keyboard continues to send the make code for the key until the key is released The rate at which the make code is sent is Known as the typematic rate typematic rate is described under Set Typematic Rate Delay When two or more keys are held down only the last key pressed repeats at the typematic rate Typematic operation stops when the last key pressed is released even if other keys are still held down When a key is pressed and held down while the interface is inhibited only the first make code is stored in the buffer This prevents buffer overflow as a result of typematic action Power Supply The system s power supply is contained inside the system unit and provides power for the system board adapters diskette drives fixed disk drives keyboard and the IBM Monochrome Display Inputs The power supply can operate at a freguency of either 60 3 Hz or 50 3 Hz and it can operate at 110V AC 5 A or 220 240V AC 3 0 A The voltage is selected with the switch above the power cord plug at the rear of the power supply The following figure shows the input reguirements Current Amps Maximum 5 0 Nominal Voltage V AC Minimum 100 Range 115V AC Maximum 125
18. ufacturer is identified by information on the tag included with the keys Include the lock number 1501419 and the tag number with your correspond ence 9 6 LEX40092 Fort Lock Co 3000 North River Road River Grove IL 60171 Chicago Lock Co 4311 W Belmont Ave Chicago IL 60641 Figure 9 12 Replacement Key Addresses General Diagnostic Tips Power On Self Test Each time you set the system unit s power switch to on the power on self test POST executes The POST takes 13 to 90 seconds to complete depending on the options installed The POST checks the following e System board e Memory Expansion Adapters e Keyboard e Primary display e Diskette Drive and Adapter e Fixed Disk Drive and Adapter if available To start the POST 1 Turn on all external devices including printer display and plotter 2 Set the system unit power switch to on 3 Turn the brightness and contrast knobs fully clockwise If you have a color monitor ensure that it is set to on 4 Watch and listen for the following responses a A cursor appears on the display in approxi mately 4 seconds b The keyboard status lights blink on then off c While the memory is being tested the memory size appears in the top left corner of the screen and increases in 64Kb increments until the total system memory is tested d The keyboard status lights again blink on then off e One short beep is heard when the POST is suc
19. 1 General Information How to Use This Manual The purpose of this Service Information Manual SIM is to provide its users with the most frequently used Personal Computer service related maintenance and reference information The SIM is not required to service the Personal Com puter family of products This SIM has been made available as a convenience to the servicer This manual is not designed to provide total product support its purpose is to supplement the Hardware Maintenance Library HMS HMR Also included with this manual are two advanced diag nostic diskettes and Service Summary Cards for use with the 5150 5155 5160 5162 and 5170 The advanced diagnostics should be used to e Test each area of the system e Isolate problems to specific areas of the system through the use of error codes e Verify correct installation and operation of the system Information about many Personal Computer options is available in this manual However if additional option information is required refer to the Hardware Maintenance Service HMS manual for your machine Note K is used interchangeably with Kb to mean 1024 bytes Safety Inspection Guide The intent of this inspection guide is to assist you in identifying potentially unsafe conditions on products included in this manual Each machine as it is designed and built has required safety items installed to protect the users and service personnel from injury This guid
20. 5170 hard files Insufficient Storage Space The following information may be used in conjunction with the advanced diagnostics in diagnosing problems encountered involving insufficient storage space on the 5160 20Mb Fixed Disk Note The customer should have backed up the system and the data files prior to beginning any repair actions Backup may not be possible after the repair action has taken place e Ensure that when the customer runs the DOS CHKDSK the number of Bytes in Bad Sectors is subtracted from Bytes Total Disk Space If the resulting number is 20 480 000 bytes 20Mb or greater the fixed disk drive is good and should not be replaced 4 12 If the resulting number is less than 20Mb e Ensure that a 20Mb Fixed Disk Adapter is installed Check for the presence of the drive type switch block e Ensure that the switch settings on the Fixed Disk Adapter card are set for the correct drive type Upon completion of the repair action the customer may need to do the following 1 Perform the DOS FDISK command 2 Run the DOS CHKDSK command to ensure that the fixed disk has 20Mb or more of usable storage space 3 Run the DOS FORMAT command 4 Do a restore of the system and data files 20M b Type 13 Identification Label 5160 Models 088 and 089 contain a 20Mb fixed disk drive The 20Mb Type 13 drive manufactured by IBM can be identified by the designation WD25 on a label at the upper left hand side of the bl
21. AT Personal Computer AT Diagnostics Error 1712 Error 1712 occurs while running advanced diagnostics against the fixed disk drives This error can occur on a system that has no legitimate problem if one of the following situations exists 1 The technician boots DOS 3 1 from the fixed disk and then invokes COMMAND from the diagnostic diskette in drive A 2 The technician boots a copy of the diagnostic diskette that was made by doing a COPY of the diagnostics to a diskette that previously had DOS 3 1 resident Either of these situations will result in an error 1712 while performing test 4 ERROR DETECTION AND CORRECTION test from the fixed disk diagnostic menu The correct method of performing diagnostic tests is to boot the original diagnostic diskette on the machine to be tested Fixed Disk Problems The following service tips and technigues can be useful for diagnosing fixed disk problems on the Personal Computer AT 5170 They are recommended for use during initial setup and at the beginning of a service call 9 16 Before using the service aid check the following items e Setup configuration record e Placement of drive terminator resistors e DOS level must be 3 0 or above e Cable continuity e Power supply voltage switch setting e Power supply voltages General Tips for Fixed Disk Problems 1 Run PREPARE SYSTEM FOR MOVING Option 3 on the main diagnostic menu prior to moving the system uni
22. Figure 2 9 on page 2 4 for the recommended action After you have followed the above steps once all you have to do when asked to perform advanced POST is 1 Set the system unit s power switch to off 2 Wait 5 seconds How to Perform Advanced Tests Advanced tests are the tests you choose from the advanced test menu The advanced test menu is stored in the system unit s read only memo ry ROM When you are asked to bring up the advanced test menu follow these steps 1 Set the system unit s power switch to on 2 Wait until advanced POST completes and the BASIC screen appears 3 Press and hold the Ctrl and Alt keys and then press the Ins key 4 Release all Keys when the screen goes blank The IBM logo appears the diskette drive if attached red light switches on for a moment and you hear one beep Then the advanced test menu appears LEX40137 Figure 2 11 Advanced Test Menu The advanced test menu consists of symbols with each symbol representing one area of the IBM PCjr The letters or numbers below the symbols are IDs of tests you can perform A quick way to determine if you are looking at the advanced test menu or the customer level test menu they look similar is to observe the ID under the joystick symbol The advanced test level has an E there The customer level has a 6 Diskette Drive Test Type MPNP Display and Light Pen Test Joystick Test Sound Test Graphics Printer Test Int
23. Guides PCjr connector guides help eliminate the possibility of connector pins being broken on the 4860 PCjr Planar Board The connector guides snap into the back cover of the system unit The installation of these guides requires no tools however the system unit and attached devices must be powered off as the cables need to be removed to facilitate installation of the guides P N6447163 provides guides along with instructions necessary for installation The part is a no cost item and can be ordered through normal parts distribution If system unit diagnostics require the use of service plugs the connector guides must be care fully removed and reinstalled at the completion of the repair activity PCjr Diskette Drive Inserts There is no specified part number for a shipping insert for the PCjr diskette drive Use the generic insert P N6447190 available from distribution Trim off approximately 0 5 inch or remove the back tab of the generic insert This will allow clearance for the latch lever to swing into the lock position without interfer ence 4860 PCjr Diagnostics Error Codes You might have an error code or an audio response during the power on self test POST If you have both an error code and an audio error disregard the audio error and perform advanced diagnostics on the FRU indicated Chapter 2 4860 PCjr 2 3 Problem POST Error Area Probable Cause No beep No image or image on screen wrong One beep N
24. Installation and Service manual Registered Trademark Installation Installation of a DunsPlus system is accomplished by following the directions in the DunsPlus Installation and Service manual which is included in the customer ship group The IBM customer engineer will be required to install both the hardware and software for each DunsPlus system The IBM customer engineer must bring to each installation a copy of the PC XT HMS manual and the current advanced diagnostic diskette Version 2 05 or later To install 1 Unpack and assemble the system unit including connection of the DunsPlus system cables 2 Run system diagnostic tests including the modem loop back test to verify proper operation 3 Format the fixed disk and install the DunsPlus supplied software using the DunsPlus Installation and Service Diskette 4 Perform the Communications Link Electronic Call Reporting Procedure provided by DunsPlus Any problems encountered while installing a DunsPlus system should be handled by calling the DunsPlus support center hotline The telephone numbers for DunsPlus support will be supplied to the IBM service representative via IBM dispatch Hardware Installation Before starting any DunsPlus installation the IBM customer engineer should be familiar with the DunsPlus Installation and Service manual This manual is part of the customer ship group and will be included in the first container to be opened marked OPEN FIR
25. Library b Insulation must not be frayed or worn Remove the back panel from the system unit Remove the five cover mounting screws from the rear panel and remove the cover Check for any obvious non IBM alterations Use good judgment as to the safety of any non IBM alterations Check inside the unit for any obvious unsafe con ditions such as metal filings contamination water or other liguids or signs of fire or smoke damage Check for worn frayed or pinched cables Ensure that the voltage specified on the voltage tag back panel of the machine matches the voltage of the power receptacle If in doubt the voltage should be verified Examine the power supply and verify the fol lowing a On universal power supplies ensure that the input voltage selection switch is set correctly b Ensure that tamper resistant fasteners in the power supply cover have not been removed or tampered with c Ensure that the grommet is installed where the internal power cables come through the frame of the power supply Check for the following labels a Battery warning Do not dispose of battery unit in fire or water See instruction for dis posal in the battery installation instructions b Caution Hazardous Area Do not remove this cover Trained service people only No serv iceable components inside Check the condition of the battery Diskette Description The recording medium is a flexible magnetic disk enclosed in a pr
26. Note PGCs with the assembly number 62X0914 are the only level PGCs that will operate in the PC AT Model 339 The Model 339 uses an 8 MHz system clock and reguires the 62X0914 assembly to operate Configuring Personal Computer with Displaywriter Attachment Refer to the IBM Displaywriter Personal Computer Attach Program Description Operation manual G544 2280 In Chapter 3 Customer Setup the refer enced documentation fails to instruct the customer on how to configure the Asynchronous Communications Adapter properly in conjunction with this feature The adapter should be set to COM1 The Asynchronous Communications Adapters are already configured from the supplier for COM1 and RS232C The feature will fail to operate with the adapter configured in the current loop mode Refer to the Hardware Mainte nance and Servic manual for the adapter configura tions 4 14 Communication Problems when DSEA Is Installed 5150 PC and 5160 PC XT communications related problems can be caused by down level system boards Some PC and PC XT communications related problems cannot be resolved with normal diagnostics when the Display Station Emulation Adapter DSEA is installed Symptoms include but are not limited to e No communications at all e One or more units dropping offline at any time e Seemingly unrelated error codes 301 516 508 548 and others at various times or simultaneously on a single unit If all ASYNC BISYNC
27. System On 10 to 40 C 50 to 105 F 0 6 to 51 7 C 33 to 125 F System Off Humidity System On 5 to 95 System Off 5 to 95 AC adapter input range 90 265V 50 60 Hz AC Electrical Figure 3 2 5140 Specifications Power Sources Several sources for power are available for the 5140 PC Convertible They are IBM PC Convertible AC Adapter The AC Adapter is designed to be used by the system while simultaneously charging the internal battery The AC Adapter supports 110V AC or 220V AC opera tion Battery Pack The battery pack contains eight rechargeable NiCad cells packaged into a single unit It resides inside the system unit and plugs onto the power supply card under the unit s covers When fully charged the battery pack will provide approximately eight hours of operation This time will vary depending upon the amount of usage of the higher consumption devices such as diskette drives Chapter 3 5140 PC Convertible 3 I IBM PC Convertible Battery Charger The battery charger is designed to be used to trickle charge the internal batteries of the system It does not provide sufficient power output to allow system opera tion while the batteries are being charged IBM PC Convertible Automobile Power Adapter The Automobile Power Adapter is designed to power the system unit while simultaneously charging the system battery pack The adapter attaches to the system unit and plugs into the cigarette lig
28. a twinaxial connector attached directly to the adapter bracket The new level was shipped to customers and is P N6851206 It has a 15 pin D type shell connector attached to the adapter bracket IBM customer engi neers service the new level of adapter only Internal sites with the early level card must go through AAS to acquire the new level Chapter 4 5150 PC 4 13 Communication Problems with Professional Graphics Controller Machines Affected 5160 5161 and 5170 Early level professional graphics controllers PGCs FRU P N6181765 may be subject to communication dif ficulties when installed in a system with communi cation adapters Affected PGCs may limit transmission speed to 300 baud Text received at higher speeds may be garbled The current level of PGC allows trans mission speeds up to 9600 baud Early level cards have the assembly number 6323697 printed on the left edge of the component side of the memory card the only card whose component side is completely visible Later level cards have the 6323697 covered and the assembly numbers 6448811 or 62X0914 printed under the J2 connector J2 is located in the upper left component side of the same card The current level card corrects these communication performance problems by allowing line speeds up to 9600 baud Early level cards assembly number 6323697 that exhibit these communication limitations should be replaced with the new FRU number 62X0912 See ECA013
29. against overvoltage and overcurrent conditions The input voltage selector switch has 115V AC and 230V AC positions If a DC overload or overvoltage condition exists the power supply automatically shuts down until the condition is corrected and the power supply is switched off and then on The internal 5 25 inch diskette drive uses the 5V DC and the 12V DC power levels Both the 12V DC and 12V DC power levels are used in the drivers and receivers of the optional communications adapters The display uses a separate 12V DC power level Chapter 5 5155 Portable 5 1 The 5V DC 5V DC 12V DC and 12V DC power levels are bussed across the system expansion slots Keyboard The IBM Portable Personal Computer keyboard cable is a detachable 4 wire shielded cable that connects to a modular connector in the front panel of the system unit The cable has power 5V DC ground and two bidirectional signal lines in it It is 762 mm 30 in long and is coiled All other functions of the keyboard are identical to the 5150 keyboard 5155 PC Portable Diagnostic Information For diagnostic information refer to 5150 5160 Based System Diagnostics on page 4 3 For a Symptom to FRU Index and further diagnostic informa tion refer to the Service Summary cards supplied with this manual 5155 PC Portable Switch Settings For 5155 PC switch setting information refer to 5160 PC XT Switch Settings on page 6 3 Note
30. be used in the store system environment 4800 Baud Modem A special 4800 baud RPQ modem is being used with the 5170 Personal Computer AT Store Controller This is an under the cover modem It operates at 4800 bps with a backup half speed of 2400 bps The interface is EIA RS232 It operates synchronously and uses auto matic adaptive equalization There is a voltage surge protection on telecommunication line connections A User s Guide GA27 3782 is supplied with the feature With the User s Guide is a diagnostic diskette P N6164858 which allows stand alone testing of the modem Loop Cables The loop cabling used in the 4680 Store System com plies with the IBM Cabling System These cables have a modular connector on one end and a data connector on the other The data connectors are self shorting when disconnected However note that if the cable is disconnected at the modular connector end at the ter minal or controller the loop will be opened If the loop is opened all the terminals on that loop will go offline The standard loop cable from the Controller Loop Adapter card is P N6316840 A different loop cable P N63X4998 is part of the special bid for the Model 819 When either end of this cable is disconnected the loop is opened The customer should supply a shorting plug at each receptacle Note The customer receptacle is not serviced by IBM The service strategy for the controller loop cable is to replace the cable as
31. breathing after an electrical accident e Use Caution If the victim is still in contact with the electrical current source remove the power to do this you may need to use the room emergency power off EPO switch or disconnecting switch If you cannot find the switch use a dry wooden rod or some other nonconductive object to pull or push the victim away from contact with the electrical current source o Work Quickly If the victim is unconscious he or she possibly needs rescue breathing If the heart has stopped beating the victim may also need external cardiac compression Only a trained and certified person2 should perform external cardiac compressions o Get Medical Aid Call a rescue group an ambu Sw a lance or a hospital immediately Rescue Breathing Procedures Determine if the victim needs rescue breathing 1 Prepare the victim a Ensure that the victim s airway is open and not obstructed Check the mouth for objects such as chewing gum food dentures or the tongue that can obstruct the flow of air b Place the victim on his or her back then put one hand under the victim s neck and the other hand on the victim s forehead c Lift the neck with one hand E and press the forehead backward with the other hand 2 Look listen and feel to determine if the victim is breathing freely a Put your cheek near the victim s mouth and nose b Listen and feel for the breathing out o
32. cessfully completed f The IBM Personal Computer basic screen appears if a diskette or an operating system is not automatically loaded from a fixed disk drive 5170 System Setup The setup program is on the advanced diagnostics diskette You need to know what options are installed in your system unit to run the setup program To set up the system 1 Remove the system unit s cover 2 Make a list of the option adapters installed in your system 3 Look at the labels on the front of the fixed disk drives and make a note of the type of drives installed 4 Look at the front bezel of the diskette drive and make a note of the type of drive installed The bezel of a double sided diskette drive has an asterisk the bezel of a high capacity drive is not marked 5 Ensure that the jumpers in your system are installed correctly 6 Ensure that all switches are set correctly Note If you receive an error code troubleshoot any error identifications other than 16X first If the only error code you receive is 16X and you cannot correct the setup program check battery voltage 7 Insert the advanced diagnostics diskette into drive A 8 Set the system unit s power switch to on The setup program will prompt you for the fol lowing information Time Allows you to set or change the time Date Allows you to set or change the date Diskette Drives Select the number and type high capacity or double sided ins
33. destroy the purpose of the devices if you do not reinstall them before com pleting your service call Reinstall all covers correctly before returning the machine to the customer Safety with Electricity Observe these additional rules when working on equip ment powered by electricity Find the room emergency power off EPO switch or disconnecting switch If an electrical accident occurs you can then operate the switch quickly Do not work alone under hazardous conditions or near equipment that has hazardous voltages Always inform your manager of any possible problem or if you must work alone puile pele e Safety e Disconnect all power Before removing or installing main units Before working near power supplies Before doing a mechanical inspection of power supplies Before installing changes in machine circuits e Before you start to work on the machine unplug the machine s power cable If you cannot unplug the cable easily ask the customer to switch off the wall box switch that supplies power to the machine and either Lock the wall box switch in the off position or Attach a DO NOT OPERATE tag Z229 0231 to the wall box switch Note A non IBM attachment to an IBM machine can be powered possibly from another source and controlled by a different disconnecting switch or circuit breaker If you determine that this condi tion is present ensure that you remove eliminate this
34. inch diskettes that are to be used in IBM Personal Computer configurations that do not have a 5 25inch 1 2Mb high capacity diskette drive This diskette drive can read and write single sided 160Kb 180Kb capacity and double sided 320Kb 360Kb capacity double density soft sectored 5 25 inch diskettes This drive is required in the 5162 to main tain diskette portability only if writing is to be done to single and or double sided diskettes that are also used in IBM Personal Computer configurations without a 5 25 inch high capacity diskette drive Such diskettes can be read only using the high capacity diskette drive 3 5 Inch Internal Diskette Drive One 3 5inch internal diskette drive with a 720Kb capacity can be installed in a 5162 unit to provide approximately 2Mb of online diskette storage when a second 5 25 inch high capacity diskette drive the 5 25 inch 360Kb diskette drive or the 4865 Model 002 External 3 5 inch Diskette Drive is not installed This 3 5inch drive is a half height drive that is installed below the standard high capacity diskette drive It attaches to the Fixed Disk and Diskette Drive Adapter and is addressed as B This 3 5 inch diskette drive reads and writes the 3 5 inch doubled sided high capacity 2 HC diskette and is housed in a rigid plastic case that contains a built in write protect switch The plastic cases have an integrated protection mechanism a metal spring loaded slide cover for the area of
35. is received The interface can request execution of a diagnostic test in the keyboard The system board consists of five functional areas the processor subsystem and its support elements the read only memory ROM subsystem the read write R W memory subsystem integrated I O adapters and the I O channel Microprocessor The heart of the system board is the Intel 8088 Micro processor This is an 8 bit external bus version of Intel s 16 bit 8086 Microprocessor and it is software compatible with the 8086 Thus the 8088 supports 16 bit operations including multiply and divide and supports 20 bits of addressing It also operates in maximum mode so a co microprocessor can be added as a feature The microprocessor operates at 4 77 MHz 5160 Models 010 10 fO 0 JO 2 12 2 1245 15 1517 6171818181816 6 7 7 648 18 8 TE 8 8 6 7 8 917 1817 8 8 181918 Standard Features ak Menon EPEC ais Memory KBE PRK ranee Memos TE KET 360Kb Diskette Drive Full High Hi g i 1li t 360Kb Diskette Drive Half High 10Mb Fixed Disk Drive 20Mb Fixed Disk Drive 10Mb 20Mb Fixed Disk Drive Adapter ASYNC Comm Adapter 83 Key Keyboard 101 Key Keyboard PC 8370 M Card ch l j g E i E f TWW Head au 4 Internal Modem a Unigue HH Extender Card wef Denotes features that are supported only on 5160 Models 088 089 267 268 277 and 278 Bd at SS 1 1 1 MG Power Supp
36. maintenance or repair of the specific machines indicated IBM makes no representations that it is suitable for any other purpose This publication could include technical inaccuracies or typographical errors Changes are periodically made to the information herein these changes will be incorporated in new editions of the publication IBM may make improvements and or changes in the product s and or the program s described in this publication at any time Requests for copies of IBM publications should be made to your IBM representative or to the IBM branch office servicing your locality Address comments concerning the content of this publication to IBM Corporation Dept 90A Bldg 234 2 Internal Zip 4307 951 NW 51st St Boca Raton Florida U S A 33432 IBM may use or distribute whatever information you supply in any way it believes appropriate without incurring any obligation to you References in this publication to IBM products programs or services do not imply that IBM intends to make these available in all countries in which IBM operates Copyright International Business Machines Corporation 1989 INSTRUCTIONS war The Personal Computer Family Service Information Manual should be assembled in the following manner e Tabs should be inserted at the beginning of each appropriate chapter The plastic Summary Card Holder located at the back of the tabs should be inserted in Chapter 21 Service Summary Cards
37. must be used Diskette Drive Type 2 Read Write Errors If you are experiencing read write errors on PCs equipped with Type 2 diskette drives check the file control card on the diskette drive If the numbers stamped or printed along the left edge of the card are 010 remove capacitor C39 from the card This capacitor is mounted on the lower left corner of the card This is the opposite end from the power con nector The capacitor is mounted between modules 4B and 5B This capacitor is generating noise on the card which causes the errors Terminating Resistor on Replacement Drives When replacing a disk diskette drive the terminating resistor should be installed on the replacement drive if one was installed on the defective drive Intermittent problems can occur if the disk diskette drive cable is not terminated The cable is terminated by the use of a terminator resistor installed on the unit logic card When replacing a disk diskette drive check to see whether a terminator is installed on the defective drive If so install a terminator resistor on the replacement drive The terminator resistor should be installed on the drive that is the last physical unit on the cable Both the disk and diskette drive cables must have terminating resistors Diskette Drive Errors Read write errors can occur when the display is mounted on the system unit The errors might he caused by the flyback transformer in the display The problem can oc
38. need only differ slightly to cause serious injury N y bu a Contents Chapter 1 General Information 1 1 How to Use This Manual 1 1 Safety Inspection Guide l l IBM Personal Computer 5150 5160 Based Systems l l Diskette Description l 2 Media Drive Compatibility Table 1 3 Diskette Care 1 4 Handling Static Sensitive Devices 1 4 Chapter 2 4860 PCjr 2 1 System Board 2 2 Power Supply 2 2 Cordless Keyboard 2 3 General Information 2 3 4860 PCjr Diagnostics 2 3 General Diagnostic Tips 2 4 Power Diagnostic Tips 2 7 Chapter 3 5140 PC Convertible 3 1 System Information _ 3 l Power Sources 3 l Options 3 2 Chapter 4 5150 PC 4 1 5150 5160 Based System Diagnostics 4 3 General Diagnostic Tips 4 3 Power Diagnostic Tips 4 3 System Memory Diagnostic Tips 4 4 Diskette Drive Fixed Disk Drive Diagnostic Tips 4 9 Communications Diagnostic Tips 4 13 5150 5160 Based System Diagnostic Information 4 14 5150 PC Switch Settings 4 14 Chapter 5 5155 Portable 5 1 5155 PC Portable Diagnostic Information 5 2 5155 PC Portable Switch Settings 5 2 Chapter 6 5160 PC XT _ 6 1 5160 PC XT Switch Settings 6 3 Memory Option Switch Settings 6 5 5160 DunsPlus System 6 14 5160 XT 370 6 17 Chapter 7 5161 Expansion Unit 7 l Chapter 8 5162 PC XT Model 286 l 5162 PC XT 286 Diagnostic Switch Setting Information 8 6 Error Codes 8 6 5162 PC XT 286 Diagnostics 8 6 Memory Switch Settings 8 6 5162 PC XT 286 Switch Setting Infor
39. og Ge HOODOO Tr DL O BO SUDDO Bf sU000 00000 Keylock Connector Memory Modules Speaker Connector Front LEX40089 Figure 9 6 5170 System Board Full Size Front View Full Size Dimensions 13 5 x 12 Down Size Dimensions 13 5 x 9 5 not shown The system board has the following components Intel 80286 Microprocessor e System support function 7 channel direct memory access DMA 16 level interrupt System clock Three programmable timers 64Kb ROM subsystem expandable to 128Kb e Either a 256Kb or a 512Kb RAM subsystem e Speaker attachment Complementary metal oxide semiconductor CMOS memory RAM to maintain system config uration e Real time clock Battery backup for CMOS configuration table and real time clock e Keyboard attachment e Eight input output I O slots 6 with a 36 and a 62 pin card edge socket 2 with only the 62 pin card edge socket Chapter 9 5170 Personal Computer AT 9 3 Memory The full size system board has four banks of memory sockets each supporting nine 128Kb x 1 modules for a total maximum memory size of 512Kb with parity checking The down size system has two rows of nine 256Kb x 1 memory modules for a total of 512Kb of memory with parity checking Microprocessor The Intel 80286 Microprocessor has a 24 bit address bus a 16 bit data bus and extensive instruction set DMA and interrupt support capabilities a hardware fixed point mul
40. on of the system The POST can be invoked at any time by pressing the Ctrl key the Alt key and the Del key at the same time then releasing them The POST is a series of system checks and initializa tion that verifies the correct operation of the base system Two classifications of malfunctions that can be detected during the POST are critical and non critical NN Critical malfunctions prevent the system from oper ating at all or could cause incorrect results that are apparent to the user Non critical malfunctions are those that cause incor rect results that might not be apparent to the user If a critical error is detected during the POST an attempt is made to indicate the error and all testing will halt On a non critical error an error code is dis played and the testing is stopped Testing can be con tinued on a non critical error by pressing the F1 key After a successful POST in which no critical errors are detected a single short beep will be generated Control is then given to the system boot strap loader It is important to remember that the POST does not test all areas but only those that allow the system to be operational enough to run the advanced diagnostics program 5162 PC XT 286 Diagnostics For a Symptom to FRU Index and additional diagnostic Ne information refer to the Service Summary Cards sup plied with this manual Memory Switch Settings The switches on the memory options are divided in
41. or fewer diskette drives or the next available drive letter if there are more than two diskette drives Note what happens when the first drive has not been FDISKed and the FORMAT C command is given DOS will not find any space allocated for it on the first drive and will go to the next drive and look there for a DOS partition If one is found there it assumes it to be the first drive names it C and begins formatting as instructed Chapter 9 5170 Personal Computer AT 9 15 Program for Parking Heads on Fixed Disk Shutdown exe on the customer diagnostics diskette in the Guide to Operations manual is for parking the heads on the fixed disk It is a stand alone version of the Prepare System for Moving module Shutdown exe should be copied to the fixed disk before executing If executed from the diskette drive Shutdown exe will cause the diskette drive to run continuously Caution Preparing System for Move Do not use PC diagnostics customer or advanced to prepare the system for moving on a Personal Computer AT 5170 Using the PC diagnostics for this purpose can damage the data on the fixed disk The failing symptom would be that the system fails to boot from the fixed disk To recover from this situation you must reformat the fixed disk because the data on cyl inder zero has been altered If the label on the diag nostic diskette does not say Personal Computer AT do not use the diskette on any model of the Personal Com puter
42. performed Note UNCONDITIONAL FORMAT should always be followed by a SURFACE ANALYSIS Tracks found to be defective since the last SURFACE ANALYSIS will be displayed at the end of the CONDITIONAL FORMAT or SURFACE ANALYSIS The defective cylinder and head should be added to the defective track label on the front of the fixed disk Before turning the system over to the customer or transferring customer data back onto the fixed disk perform the DOS FDISK then DOS FORMAT See the DOS manual for FDISK and FORMAT description Chapter 9 5170 Personal Computer AT 9 19 Types of Format SURFACE ANALYSIS The SURFACE ANALYSIS procedure does a complete read write operation on all tracks SURFACE ANALYSIS will flag any tracks that are determined defective during the read write operations SURFACE ANALYSIS does not save a record of previously flagged tracks CONDITIONAL FORMAT The CONDITIONAL FORMAT procedure identifies and flags defective tracks by performing a SURFACE ANALYSIS It also saves a record of all defective tracks flagged as defec tive during manufacturing as well as any found defec tive during the last CONDITIONAL FORMAT or SURFACE ANALYSIS CONDITIONAL FORMAT writes the sector IDs and reads them back for verifica tion UNCONDITIONAL FORMAT UNCONDITIONAL FORMAT does not perform a SURFACE ANALYSIS This format should be performed only when CONDI TIONAL FORMAT is not successful UNCONDI TIONAL FORMAT ignores error co
43. proper operation of the power supply When the supply is switched off for a minimum of 1 second and then switched on the power good signal is generated assuming there are no problems This signal is a logical AND of the DC output voltage sense signal and the AC input voltage sense signal The power good signal is also a TTL compatible high level for normal operation and a low level for fault condi tions The AC fail signal causes power good to go to a low level at least 1 millisecond before any output voltage falls below the regulation limits The oper ating point used as a reference for measuring the 1 millisecond is normal operation at minimum line voltage and maximum load The DC output voltage sense signal holds the power good signal at a low level when power is switched on until all output voltages have reached their minimum sense levels The power good signal has a turn on delay of at least 100 milliseconds but not longer than 500 milliseconds and is capable of sourcing 2 milliam peres and sinking 10 milliamperes The following figure shows the minimum sense levels for the output voltages Level V DC Minimum V DC Figure 8 9 5162 Sense Levels Connectors The following figure shows the pin assignments for the power supply output connectors Load Point Voltage V DC P8 1 Power Good P8 2 P8 3 P8 4 P8 5 P8 6 Ground Ground 5 5 5 5 12 Ground Ground 5 12 Ground Ground 5
44. slots The IBM Monochrome Display has its own power supply receiving its AC power from the system unit s power system The AC output for the display is switched on and off with the power switch and is a nonstandard connector so only the IBM Monochrome Display can be connected Keyboard The 83 key keyboard is standard on all 5160 models excluding Models 089 268 and 278 The 101 key keyboard is standard on 5160 Models 089 268 and 278 Both the 83 key keyboard and the 101 key keyboard are interchangeable only on 5160 Models 088 089 267 268 277 and 278 Models 088 267 and 277 are identical to Models 089 268 and 278 respectively with the excep tion of the keyboards 5160 PC XT Diagnostic Information For diagnostic information refer to 5150 5160 Based System Diagnostics on page 4 3 For a Symptom to FRU Index and additional diagnostics information refer to the Service Summary cards sup plied with this manual 5160 PC XT Switch Settings Figure 6 5 shows switches on the system board These settings are necessary for the system to address the attached devices and to specify the amount of memory on the system board Switch Block LEX40233 Figure 6 5 Switch Block Switch Switch Position Function 1 Normal operation off set to on to loop POST 2 Math coprocessor off if coprocessor is installed on if coprocessor is not installed 3 4 Amount of memory on the system board 5 6 Type of m
45. switch setting for the 256Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed Chapter 4 5150 PC 4 4 608Kb Total Memory 352Kb 256Kb on System Board System Board Switches Switch Block 1 256K Option or 64 256K Option Card Switches 4 64 256K option with 256K installed t 64 256K option with 64K installed 1 32K option 1 64 256K option with 256K installed 1 64K option 1 32K option 64K Option Card Switches 32K Option Card Switches LEX40231 The switch setting for the 256Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed 4 42 ae 640Kb Total Memory 384Kb 256Kb on System Board System Board Switches Switch Block 1 Switch Block 2 256K Optionor 32K Option 64 256K Option Card Switches Card Switches 1 64 256K option with 256K installed 1 64 256K option with 64K installed 1 64K option 1 64 256K option with 256K installed 2 64K options 1 64 256K option with 256K installed 1 64 256K option with 128K installed LEX40232 The switch setting for the 256Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed Chapter 4 5150 PC 4 43 Chapter 5 5155 Portable Se Drive A KI EN FA a AY Y Ss y ras cg ee A SY y See Eels arate XA Bente LEX41803 Figure 5 1 5155 Portable The 5155 consists of a lightweight casing with a car rying handle containing a built in
46. the number of diskette drives attached Chapter 4 5150 PC 4 1 The system board consists of five functional areas the microprocessor subsystem and its support elements the read only memory ROM subsystem the read write R W memory subsystem integrated I O adapters and the I O channel The read write memory is also referred to as random access memory RAM Microprocessor The heart of the system board is the Intel 8088 Micro processor This is an 8 bit external bus version of Intel s 16 bit 8086 Microprocessor and is software compatible with the 8086 Thus the 8088 supports 16 bit operations including multiply and divide and supports 20 bits of addressing It also operates in maximum mode so a co microprocessor can be added as a feature The microprocessor operates at 4 77 MHz Power Supply 5 1 4 Inch Diskette Drive Power Connectors System Board Power System Unit Power Connector On Off Power Connector IBM Monochrome Display Power Connector Internally Switched LEX40073 Figure 4 4 Power Supply The system power supply is located at the right rear of the system unit It is an integral part of the system unit chassis Its housing provides support for the rear panel and its fan furnishes cooling for the whole system It supplies the power and reset signal necessary for the operation of the system board installed options and the keyboard It also provides a switch AC socket for the IBM Monochrom
47. the parity check message If the failing address cannot be identified five question marks are displayed under the parity check message The first character of a parity check error code identi fies the failing bank For example error code 40000 indicates that bank 1 of the system board is failing Failing Memory Bank System board bank 0 System board First Character of Parity Error 4 5 6 or 7 bank 1 Figure 9 21 Parity Check Code lf the first character of the parity check error code is 0 1 2 3 4 5 6 or 7 replace the 18 memory modules in the failing bank If the same parity check error code occurs replace the system board If the first character of the parity check error is 8 or 9 replace the 18 memory modules of the base Memory Expansion Adapter If the same error code occurs replace the adapter Parity Check 2 Message on 5170 Models 068 099 The 5170 Models 068 and 099 system units with system board P N8286112 an Enhanced Graphics Adapter and the 0 5Mb to 2Mb Memory Expansion Adapter message if a soft boot Ctrl Alt Del function is per formed If you have a system with the above configuration and error message install ECA024 Memory Errors Bit Bank Locations Bee Characters of Error Code Problem Area 00 01 02 or 03 04 05 06 07 System Board 128Kb Memory Exoansion Adapter 1 1 lib 12 I l3 1 18 19 1A 1B 1C 1D 1E 1
48. the system unit s power switch to off 2 Remove all installed Memory Expansion Adapters 3 Set the system unit s power switch to on 9 10 4 Run the setup program Ensure that the memory size is correctly set 5 Repeat the diagnostic test that failed Note If the diagnostic test passes on bare system memory configuration you might have a memory failure on one of your Memory Expansion Adapters 6 Set the system unit s power switch to off 7 Install one Memory Expansion Adapter at a time to test Note If you have a 128Kb Memory Expansion Adapter install it first oo Set the system unit s power switch to on 9 Run the setup program Ensure that the memory size is correctly set 10 Repeat the diagnostic test that failed When a memory error is present and location cannot be isolated it is best to break down the system s memory in sections to locate the most probable point of origin Parity Checks Parity check 1 indicates a system board parity error Parity check 2 indicates a Memory Expansion Adapter parity error If the memory test ended without returning a lo character error message the message might be a parity check message as in Figure 9 20 PARITY CHECK X XXXXX LEX40167 Figure 9 20 Parity Check Message After a parity check error the memory is scanned to see if a failing address can be identified If identified the address is displayed as a 5 character alphanumeric code under
49. 0 Chapter 9 5170 Personal Computer AT 9 11 128Kb Memory Expansion Errors A lo character error code that begins with 08 or 09 indicates a 128Kb Memory Expansion Adapter failure The last 4 characters of your error code indicate the failing module of the bank For example error code 080002 0004 corresponds to the failing module indi cated by the arrow in the Figure 9 24 Find the 128Kb Memory Expansion Adapter it is the only Memory Expansion Adapter with no switches Refer to Figure 9 24 and find the failing module for your error code Last 4 Characters of Error Code 0000 P 0001 0 0002 1 0004 2 0008 0010 4 0020 5 0040 6 0080 7 0100 8 0200 9 0400 10 0800 11 1000 12 2000 13 4000 14 8000 15 LEX43139 Figure 9 24 Failing Module Location Note Replace both parity P modules if the last 4 characters of your error code are 0000 512Kb Memory Expansion Errors Refer to Figure 9 25 and find the first 2 characters of your error code make a note of the failing bank 0 or D Compare the switch settings shown for those charac ters with those of all 512Kb Memory Expansion Adapters in your system The failing adapter is the one with switch settings that match those in Figure 9 25 First 2 Characters Of Error Code Memory Expansion Bank Adapter Switch Settings L 2 3 5 T 8 10 11 12 13 0 On On On Off On On On On 14 15 16 17 1 On On On Off On Off
50. 0 mm 19 6 in Depth 410 mm 164 in Weight 14 9 kg 33 lb Power Cable Length 1 83 m 6 ft Size 18 AWG Signal Cable Length 1m 3 28 ft Size 22 AWG Environment Air Temperature System On 15 6 to 32 2 C 60 to 90 F 10 to 43 C 50 to 110 F System Off Humidity System On System Off 8 to 80 20 to 80 Heat Output 750 BTU hr 49 5 dBa Expansion unit attached to system unit with monochrome display Noise Level Electrical Nominal Minimum 104V AC Maximum 127V AC kva 0 41 max 120V AC Figure I Y 5161 Specifications Chapter 7 5161 Expansion Unit 7 1 Expansion Board Expansion Expansion Unit saa Expansion Slots ray pi on Os J1 J2 J3 J4 J5 J6 J7 JB SLLLLLHITHTHEHEDITHHIDFDFDDYNTFFDWD gr Ty YT TTTYFTTTYTTTYWWTN LLLLLTIITT LDT TD TDHTFTHTYU aT TTTTTTTHTT TT TT 7T1TWT ST MELLTH FU ITI AT ATH TT TTTTYTTYTHU N LLLLL Li IT TF 1TH y ALT TT TT7T71TTT N SLIT TITER LTT EE rer Ty ACITITIITET 7111177717771 TYN NLLITITELEEL ITI TELL ec y fi m m w B wm w a a a am ii 4 a m w a Lad Color Trimmer Capacitor LEX40081 Figure 7 4 5161 Expansion Board The expansion board is a support board that carries the I O channel signals from the option adapters and Receiver card Decoupling capacitors provided on the expansion board aid in noise filtering Using Expansion Slot 8 Any card placed in
51. 00 mm 19 6 in 410 mm 16 1 in 12 7 kg 28 lb 1 8 m 6 ft 15 6 to 32 2 C 60 to 90 F 10 to 48 C 50 to 110 F 8 to 80 20 to 80 824 BTU hr max Chapter 8 5162 PC XT Model 286 Noise Level 46 dBa System Unit without display or printer attached Electrical Range 1 57 63 Hz Nominal 115V AC Minimum 90V AC Maximum 137V AC Range 2 47 53 Hz Nominal Minimum Maximum 230V AC 180V AC 265V AC Lithium Battery 6 0V DC 1 amp hr capacity UL Approved Figure 8 2 Part 2 of 2 5162 Specifications 5162 PC XT Standard Features The following are standard features of the 5162 Model 286 Power supply 157 watt Internally switched to support 115V AC or 230V AC System board 80286 Microprocessor 6 MHz Clock 8 Expansion Slots 5 with a 36 pin and 62 pin card edge socket 83 with only the 62 pin card edge socket _640Kb base random access memory RAM Complementary metal oxide semiconductor CMOS RAM to maintain the system setup configuration Battery to keep CMOS active when power is off e Speaker e Half high 1 2Mb diskette drive e 20Mb fixed disk drive e 101 102 key keyboard Chapter 8 5162 PC XT Model 286 sia Incompatible Adapters System Differences Certain option adapters are not compatible when used This section shows the differences between the PC XT ee in the same system 5162 and the rest of the PC family
52. 3 watt three voltage level two stage supply The first stage is an external power transformer that provides a single fuse protected extra low AC voltage output The second stage is an internal printed circuit board which is vertically mounted into the system board The second stage converts the transformer s AC output into three DC output levels Power is supplied to the system board through a printed circuit board edge connector The diskette drive is powered through a separate 4 pin connector mounted on the front edge of the power board The power for the diskette drive fan is provided by a 3 pin Berg type connector mounted directly below the diskette drive connector Power is removed from the system board and diskette drive by a switch mounted on the rear of the power board Both the switch and the transformer connector are accessible from the rear of the system ee Cordless Keyboard FLEE cee i ef Y ia aadaaag sn dd F H K L T E A 7 Neie ee eet A si le TI ui eee E LEX41744 Figure 2 8 4860 Cordless Keyboard The keyboard is a low profile 62 key detached key board with full travel keys The keys are arranged in a standard typewriter layout with the addition of a func tion key and cursor control keys The keyboard is battery powered and communicates to the system unit with an infrared IR link The IR link makes the remote keyboard a truly p
53. 60 PCjr 2 LEX40143 Figure 2 19 Diskette Drive Pin Placement Diskette Drive Fan Voltage at the Power Board The voltages at the diskette drive fan connector on the power board should be within the ranges listed below LowV DC HighV DC Pin 2 to Pin 1 11 4 12 6 Pin 2 to Pin 3 114 12 6 Figure 2 20 Fan Power Board Voltage Levels LEX40144 Figure 2 21 Fan Power Board Pin Placement Display Voltage at the System Board The voltages at connector D should be within the ranges listed below Low V DC High V DC Pin A2 to Pin A4 Pin A2 to Pin A5 Pin A2 to Pin A6 Pin A2 to Pin A7 Pin A2 to Pin B1 Pin A2 to Pin B3 Figure 2 22 Display Board Voltage Levels 2 8 123456789 A e9eoooeooo B 99eeo0eeoee LEX40145 Figure 2 23 Display Board Pin Placement Continuity of Color Display Adapter Cable S pin Connector 2 x S pin Connector from Position to Position Fe gn i ee ee Figure 2 24 Color Display Adapter Cable Con nections LEX40146 Figure 2 25 Color Display Connector Locations Continuity of Serial Device Adapter Cable 25 pin Connector 2 xS pin Connector from Position to Position 1 2 3 4 5 6 7 8 2 Figure 2 26 Serial Device Adapter Cable Continuity LEX40147 Figure 2 27 Serial Device Adapter Cable Pin Place ment Continuity of Keyboard Cable 2x 3 Connector Keyboard Plug from Pin to Pin Figure 2 28 Ke
54. 8 12345678 System Board Switches Switch Block 1 ATT a LHL Switch Block 2 AAA ni LEX40198 Chapter 4 5150 PC 4 17 96Kb Total Memory 32Kb 64Kb on System Board System Board Switches Switch Block 1 64 256K Option 64K Option 32K Option Card Switches Card Switches Card Switches 1 32K option LE X40199 128Kb Total Memory 64Kb 64Kb on System Board System Board Switches Switch Block 1 64 256K Option 64K Option 32K Option Card Switches Card Switches Card Switches 1 64 256K option with 64K installed 1 64K option 2 32K options LEX40200 4 18 160Kb Total Memory 96Kb 64Kb on System Board System Board Switches Switch Block 1 64 256K Option 64K Option 32K Option Card Switches Card Switches Card Switches 1 64 256K option with 64K installed mae ORE WE EHEEE 182K option inet Wu RH aAAAAR 23 5 67b 2 5 A 6 7 Ba RWBER BMRWRAARH 1 64K option 1 32K option 3 32K options LEX40201 Chapter 4 5150 PC 4 19 64 256K Option 64K Option Card Switches Card Switches Gad SE 1 64 256K option with 64K option installed le WAG AUU 1 64K option in R WAG AUU 2 64K options 1 64 256K option with 64K installed 2 32K options 1 64K option 2 32K options 1 64 256K option with 128K installed N LEX40202 4 20 Nee System Board Switches 1 64 256K option with 64K installed 1 64K option 1 32K option 2
55. 9 inch amber com posite display and one 5 25 inch Slimline double sided diskette drive with space available for an optional second drive The system board is the same as that of the 5160 PC XT with 256Kb of memory Unit Specifications Size Hei ght 204 mm 8in Wi dth 500 mm 20 in Depth 430 mm 17 in Wei ght 13 6 kg 30 Ib Power Cable Length 1 83 m 6 ft Size 18 AWG Environment Air Temperature System On 15 6 deg to 32 2 deg C 60 deg to 90 deg F System Off 10 deg to 43 deg C 50 deg to 110 deg F Humi di ty System On 8 to 88 System Off 20 to 80 Heat Output 650 BTU hr max Figure 5 2 Part 1 of 2 5155 Specifications Noise Level 49 5 dBa System unit with monochrome display and expansion unit attached Electrical Nomi nal 120V AC Mi ni mum 104V AC Maxi mum 127V AC kva 0 32 max Figure 5 2 Part 2 of 2 5155 Specifications Power Supply Power Supply Fan Connector IBM Display Connector 5 25 Inch Diskette Drive PI 3 Power Connectors PI 2 PI 1 Voltage N TF Selector P10 Switch n On Off Switch Power Supply Fan System Board Power Connectors LEX40075 Figure 5 3 5155 Power Supply and Connectors The system unit s power supply is a 114 watt switching regulator that provides five outputs It supplies power for the system unit and its options the power supply fan diskette drive composite display and keyboard All power levels are protected
56. AT printer and the ability to transfer data between the PCAT 370 and the host system disks Chapter 9 5170 Personal Computer AT 9 27 PC 370 M2 Card LEX40135 Figure 9 50 PC 370 M2 Card The PC 370 M2 card contains 512Kb of parity checked RAM which can be used by either the PC 370 P2 card or by the Personal Computer AT In 8 370 mode this applies 480Kb of memory for program use and 32Kb of control storage for microcode use From the IBM Per sonal Computer AT only 128Kb of S 370 memory is addressable at any one time Personal Computer AT Store Controller This section contains information specific to the Per sonal Computer AT Store Controller Additional system information that is common to the base system 5170 AT can be found in the 5170 product specific section Information that is unique to the store con troller is included in this section Unique parts for the store controller can be found in the parts section of this document under the title of 5170 AT Store Con troller 9 28 LEX42628 Figure 9 51 Store Controller The store controller system unit based on the 5170 Personal Computer AT operates with the 4680 Oper ating System Programs These licensed programs provide the 5170 Model 8XX Store Controller with the capability to control the IBM 4683 Point of Sale Ter minal with a multitasking multiuser environment nec essary for the user to run application programs manage system services and define s
57. Cable 10Mb Fixed Disk Drive When installing the cable P N8529271 from the 10Mb or 10Mb 20Mb Adapter card to the 10Mb fixed disk drive the cable must be plugged into the adapter with the trace wires facing up away from the system board 20Mb Fixed Disk Drive When installing the cable P N6480086 from the 10Mb 20Mb Adapter card to the 20Mb fixed disk drive the cable must be plugged into the adapter with the trace wire facing down toward the system board Communications Diagnostic Tips ASYNC Card Jumper Expansion slot 8 on the system board is slightly dif ferent in that any card placed in that slot is expected to respond with a Card Selected Signal Only one IBM card provides this signal the Asynchronous ASYNC Communications Adapter To provide this signal the ASYNC Communications card must have Jumper J 13 installed Any card placed in that slot that does not provide a Card Selected Signal will not be recognized as being installed 1101 Errors When running the asynchronous diagnostics on a 5150 PC or a 5160 PC XT the ASYNC card P N8529150 must be set for RS232C Interface Otherwise 1101 errors will result during testing After testing return the card to its original position if the customer uses current loop interface Down Level DSEA IBM Customer Engineer Only There are two levels of the PC Display Station Emu lation Adapter DSEA The early level P N6851163 was shipped only to IBM internal accounts It has
58. DITIONAL FORMAT If the time between cylinders still exceeds 5 seconds replace the fixed disk drive a Load the advanced diagnostics diskette and select the FIXED DISK DRIVE S AND ADAPTER test b Select option 1 CONDITIONAL FORMAT Note CONDITIONAL FORMAT will mark those tracks listed on the front drive label and tracks identified as bad during a surface anal ysis as unusable Any defective tracks that are not already listed on the drive label should be added to the list c If no error occurs during CONDITIONAL FORMAT go to Step 7g this section d If an unrecoverable error occurs during CON DITIONAL FORMAT select option 2 UNCONDITIONAL FORMAT e Use the label on the front of the fixed disk drive as input for the bad track data at the start of the routine f After an UNCONDITIONAL FORMAT retry the CONDITIONAL FORMAT If the CONDI TIONAL FORMAT fails replace the fixed disk drive See Step 6 on page 9 18 in this section and retry the CONDITIONAL FORMAT If it still fails replace the Fixed Disk Diskette Adapter See Step 5 on page 9 18 in this section g If this is a replacement fixed disk drive repeat Step 3 on page 9 17 in this section and then go to Step 8 in this section h If this is not a replacement fixed disk drive go to Step 8 in this section 8 Final Checkout a Re check all cable connections b Install the system unit cover c Power on the system unit load the advanced diagnostics and sel
59. F 512Kb Expansion Memory Adapter 1 512Kb Memory Expansion Adapter 2 Figure 9 22 Part 1 of 2 Memory Problem Area Location First Two Characters of Error Code 20 21 22 28 24 25 26 27 28 29 2A 2B 2C 9D 9E 2F 380 31 32 39 84 85 36 37 Problem Area 612Kb Memory Expansion Adapter 3 512Kb Memory Expansion Adapter 4 512Kb Memory Expansion Adapter 4 Figure 9 22 Part 2 of 2 Memory Problem Area Location System Board Errors A lo character error code that begins with 00 01 02 03 04 05 06 or 07 indicates a system board memory failure The first 2 characters of your error code indicate which bank has the failing memory module The last 4 characters indicate the failing module of the bank For example error code 04002 8000 corresponds to the failing module indicated by the arrow in the Figure 9 23 Refer to Figure 9 23 and find the failing module for your error code Last 4 Characters of Error Code ah z 0000 P 0001 O BUR GG HT Bank 0004 2 04 96 0008 3 06 or 07 A 0010 4 i 0020 5 A 0040 6 0080 7 0100 8 0200 9 00 01 eg Foe ea ee ek 0400 10 l i TE 0800 11 oos E U cd EA D E A IL SA a 2000 13 4000 14 Front 8000 15 LEX40168 Figure 9 23 System Board Top View Note Replace both parity P modules in the failing bank if the last 4 characters of your error code are 000
60. K option 1 32K option LEX40247 6 10 512Kb Total Memory 256Kb 256Kb on system Board 256K Option or 64 256K Oion 64K Option 32K Option Card Switches Card Switches p Card Switches b3 45s6Jds N ial i Tafnfnfnlu 1 64 256K option with 128K installed 2 64K options 78 ia alata 1 64 256K option with 192K installed EEO IEU 1 64K option ial efo Ff 1 64 256K option with 192K installed 2 32K options 1 64 256K option with 256K installed LEX40248 The switch setting for the 256Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed 544Kb Total Memory 288Kb 256Kb on System Board 64 256K Option 64K Option 32K Option Card Switches Card Switches Card Switches 1 64 256K option with 192K installed 1 64K option 1 32K option 1 64 256K option with 256K installed 1 32K option LEX40249 The switch setting for the 256Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed Chapter 6 5160 PC XT 6 11 576Kb Total Memory 320Kb 256Kb on System Board as o 64K Option 32K Option L PHON Card Switches Card Switches Card Switches 1 64 256K option with 192K installed 2 64K options 1 64 256K option with 256K installed 1 64 256K option with 64K installed 1 64 256K option with 256K installed 1 64K option 1 64 256K option with 256K installed 2 32K options LEX40250 The switch setting for the 256
61. Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed 608Kb Total Memory 352Kb 256Kb on System Board 256K Option or SM 64 256K Option Card Switches 64K Option 32K Option Card Switches Card Switches 1 64 256K option with 256K installed 1 64 256K option with 64K installed 1 32K option 1 64 256K option with 256K installed 1 64K option 1 32K option LEX40251 The switch setting for the 256Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed 640Kb Total Memory 384Kb 256Kb on System Board 256K Option or 64K Option 32K Option GN Son Option Card Switches Card Switches Card Switches 1 64 256K option 256K installed 1 64 256K option 64K installed 1 64K option 1 64 256K option 256K installed 1 64 256K option 128K installed 1 64 256K option 256K _ installed 2 64K options The switch setting for the 256Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed eae Chapter 6 5160 PC XT 6 13 Extender Card Switches Set the switches on the extender card to reflect total system memory System Extender Card Memory Switch Block 16K to 64K 96K to 128K 160K to 192K 288K to 320K Zo zoO CH CN mu Li gt zo CHE C Wo a m Cc WN o m_J gt E 480K to 512K zo CE ln ie CH LEX40253 Note Model 5160 XT 370 20Mb
62. Kb to expansion memory 512Kb Memory Expansion Option Bank 0 Bank 1 Switches 6 7 8 6 7 8 On On On Off On Off This card adds 512Kb to expansion memory 512K b 2Mb Memory Expansion Option This option adds from 512Kb to 2Mb of expansion memory O 5Mb to 3Mb or 0 5Mb to 6Mb Memory Expansion Option Switches 6 and 7 are set for the amount of base memory in the system Switches 6 7 256Kb On Off 512Kb Off On 640Kb Off Off 640Kb must be allocated to base memory If the system has less than 640Kb of base memory a portion of memory on the Expansion Adapter card is used as base memory When switches 6 and 7 are set for the actual amount of base memory in the system the system determines the amount of memory needed from the Expansion Adapter card to bring base memory up to 640Kb If multiple 0 5Mb to 6Mb Memory Expansion cards are installed the card with the highest address has switches 6 and 7 set for the actual base memory in the system Switches 6 and 7 on the other cards are set to indicate 640Kb of base memory There cannot be any gap between newly added memory and existing memory in the expansion memory area If multiple memory expansion cards are used the 0 5Mb to 6Mb Expansion card must always be the last card if a portion of its memory is used for base memory Switch 8 Used to enable switch on or disable switch off the I O ports on the card O 5Mb to 3Mb or 0 5Mb to 6Mb Memory Expansion Adapter Setup Note
63. O Block 1 TI 16K or 64k Unit Specifications Renda Bank2 Access Bank 3 Memory Modules System Unit Pinl Speaker Cassette Microphone Size Output or Auxiliary Select Height 142 mm 5 5 in Length 500 mm 19 6 in Depth 410 mm 16 1 in LEX40072 Weight 11 4 kg 25 1b Figure 4 3 5150 System Board O 1 83 m 6 ft The system board fits horizontally in the base of the Ge 18 AWG system unit It is a multilayer single land per channel design with ground and internal planes provided DC Environment power and a signal from the power supply enter the Air Temperature board through two 6 pin connectors Other connectors System On 15 6 to Ue on the board are for attaching the keyboard audio cas 60 to 90 F sette and speaker Five 62 pin card edge sockets are System Off 10 to 439C 50 to 110 F also mounted on the board The I O channel is bussed Hanidity across these five I O slots System On 8 to 80 System Off 20 to 80 Two dual in line package DIP switches two eight switch packs are mounted on the board and can be Heat Output 365 BTU hr max read under program control The DIP switches provide rn a the system software with information about the a oe Pa installed options how much storage the system board has what type of display adapter is installed what Figure 4 2 Part 1 of 2 5150 PC1 Specifications operation modes are desired when power is switched on color or black and white 80 or 40 character lines and
64. On Off 18 19 1A 1B On On On Off Off On On On 1C 1D 1K 1F On On On Off Off Off On Off 20 21 22 23 On On Off On On On On On 24 25 26 27 On On Off On On Off On Off 28 29 2A 2B On On Off On Off On On On 2C 2D 2E 2F On On Off On Off Off On Off 30 31 32 33 0 On On Off Off On On On On 34 25 36 37 1 On On Off Off On Off On Off Figure 9 25 Failing Adapter Location The first 2 characters of your error code indicate which bank has the failing memory module The last 4 characters indicate the failing memory module of the bank For example error code 100002 0080 corre sponds to the failing module indicated by the arrow in Figure 9 26 Refer to Figure 9 26 and find the failing module for your error code Last 4 Characters of Error Code 0000 P N 0001 0 Bank ope gul oos Bank PPRRRRRREORARAAAHAACOO Jig oo10 a Dnnnnnennnu Dpungng oos 0080 7 0100 8 0200 9 0400 10 0800 11 1000 12 2000 13 4000 14 8000 15 LEX40170 Figure 9 26 Failing Module Location Note Replace both parity P modules if the last 4 characters of your error code are 0000 Parity 1 Check Some planar boards P N8286112 with the RAM jumper J18 were installed on the wrong pins For a 256Kb planar this jumper should be on pins 2 and 3 and for a 512Kb planar on pins 1 and 2 If the jumper is installed wrong and an Enhanced Graphics Adapter EGA is installed the system will get parity 1 chec
65. Option Card Switches LEX40227 7 f ee System Board Switches Switch Block 1 256K Option or p 64 256K Option Card Switches 1 64 256K option with 128K installed 2 64K options 1 64 256K option with 192K installed 1 64K option 1 64 256K option with 192K installed 2 32K options 1 64 256K option with 256K installed The switch setting for the 256Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed 512Kb Total Memory 256Kb 256Kb on System Board 64K Option Card Switches LEX40228 Chapter 4 5150 PC 4 39 544Kb Total Memory 288Kb 256Kb on System Board System Board Switches 1 64 256K option with 192K installed 1 64K option 1 32 option 1 64 256K option with 256K installed 1 32 option LEX40229 The switch setting for the 256Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed 4 40 i f br _ 976Kb Total Memory 320Kb 256Kb on System Board System Board Switches Switch Block 1 Switch Block 2 256K Option or 64K Opti B Opti MAU ption 32K Option 64 256K Option Card Switches Card Switches Card Switches 1 64 256K option with 192K installed 2 64K options 1 64 256K option with 256K installed 1 64 256K option with 64K installed 1 64 256K option with 256K installed 1 64K option 1 64 256K option with 256K installed 2 32K options LEX40230 The
66. P N8483772 and P N8483773 Since channel problem isolation requires I O isolation from the 5170 containing this feature a CE trained on the attached device should perform the channel wrap diagnostic test when needed This test will aid in iso lation to the failing FRU for channel related problems in the S 370 Channel Emulator or the attached I O device The test will identify the failing line providing the line name and the channel cable pin number An ohmmeter can then be used to isolate the FRU with the failing line Successful completion of the internal card test verifies proper operation of 90 of this feature Successful wrap tests conducted with the wrap plugs attached at the end of the interface cable verify proper operation of the entire feature For a 3820 attachment any simple customer job when successfully sent to the printer from the remote host will verify the proper operation of the complete system attachment 5170 PC AT Switch Settings Display Switch fires Eat LTT CG aun ooon orl E N a 00 NU f iz Keylock Connector RAM Jump r Speaker Connector LEX40254 Figure 9 41 5170 System Board Full Size Front View Full Size Dimensions 13 5 x 12 Down Size Dimensions 13 5 x 9 5 not shown J umper The system board has a 3 pin Berg strip connector The placement of a jumper across the pins of the con nector determines whether the system board s second 256Kb of RAM is enabled or dis
67. PY Problems Using Type 3 Diskette Drive DOS DISKCOPY might not function correctly under certain unique circumstances when using the same diskette drive for both source and target diskettes on the PC 5150 and PC XT 5160 The DOS DISKCOPY procedure might not function correctly on a Personal Computer or Personal Com Diskette Drive B Diskette Drive B puter XT which has a Type 3 diskette drive s less Signal Cable Connector Signal Cable Connector than 416Kb of memory and is using an unformatted Even Pin Numbering Odd Pin Numbering target diskette To prevent this problem use for Diskette Adapter Diskette Adapter matted target diskettes when running DISKCOPY After using DISKCOPY a directory should be run to ensure that all files were copied If the use of for matted diskettes is not an acceptable solution exchange the diskette drive See ECA015 Diskette Drive Inserts Diskette drive inserts can be ordered from Parts Dis tribution using P N6447190 The inserts prevent head damage when the unit is shipped An insert should be placed inside the diskette drive for the following condi tions e Shipping a machine to and from a repair center e Returning a machine to customers when transpor tation is involved e Returning defective drives Figure 4 19 Diskette Drive Connector Adapters This insert should be used on the 5150 and 5160 Types 1 2 and 3 diskette drives only 4 10 Nor SNe te Ma SRR LO Diskette D
68. Parallel Adapter Parallel Port GPIB Adapter s Data Acquisition Adapter s 4 If you find two cards with the same interrupt remove one of them and see if the failure symptom disappears These steps are similar to the intermittent problem steps in the Hardware Maintenance and Service HMS manual The most important point of this tip is that when a failure symptom is isolated to one adapter card that card is not necessarily defective but might be incompatible with the other cards in the PC Incompatibility can also be caused by factors other than interrupt such as memory address and DMA Also conflicting interrupts will not always cause fail ures New 5170 System Boards The memory module sockets located on system boards P N8286112 P N6480170 and P N6480072 have been redesigned The contacting surface for the memory modules is located below the top of the pin holes and is not visible from the top of the socket The new style socket provides a good contact surface for the memory module and is functionally equivalent to the old style Note When replacing a system board remember to reinstall the math coprocessor if present in the new system board Memory Error Isolation This hint is to help diagnose memory and or parity check errors if memory bank and bit position is not found during either the power on self test POST or memory diagnostics Read each step of the following instructions before beginning 1 Set
69. Personal Computer Family Service Information Manual SA38 0037 00 Preface The purpose of this Service Information Manual SIM is to provide its user with the most frequently used service related maintenance and reference information The SIM is not required to service the Personal Computer family of products The SIM has been made avail able as a convenience to the user The SIM is divided into sections by product specific information for each machine type with additional sections for general Personal Computer information This document can also be ordered by specifying Bill of Forms BOF 2481 Other items included in this BOF are diskettes service summary cards tabs binders and plastic diskette holders Individual form numbers for these additional items are Diskettes IBM Advanced Diagnostic for the 5150 5155 and 5160 Version 2 25 SA380033 IBM Advanced Diagnostic for the 5162 and 5170 Version 2 07 SA38 0034 Service Summary Cards 5162 and 5170 Service Summary Card SA38 0035 5150 5155 and 5160 Service Summary Card SA38 0036 Printer Supplement SA38 0040 Tabs SA38 0038 Plastic Diskette Holders 5 25Inch 2 U M SA38 0015 First Edition January 1989 This major revision obsoletes SR28 0280 02 The drawings and specifications contained herein shall not be reproduced in whole or in part without written permission IBM has prepared this Service Information Manual for the use of IBM customer engineers in the installation
70. S format parameters for the drive type and media type being used Refer to the DOS manual for media interchangeability rules under DOS ee Diskette Disk File Limitations Floppy diskettes are limited to 64 112 or 224 files in their root directory depending on the type of diskette and the type of format used Fixed disks can have up to 512 files in the root directory depending on the size of the DOS partition If the allowed number is exceeded in either case disk full errors will result The problem can be resolved by placing the excess files in subdirectories See the DOS technical reference for additional information Disk Diskette Adapter Replacement The Disk Diskette Adapter P N8286125 has a resistor pack on the card guide edge of the adapter This resistor pack is located approximately 1 5 inches from the top of the adapter and is labeled Z2 Caution should be used when replacing this adapter because the resistor could hit the card guide and crack or break the resistor If this happens a damaged resistor could cause solid or intermittent 17XX errors fixed disk type failures When replacing the dual card P N8286125 the redesigned guide that has been pro vided should be used This guide is beveled to prevent component damage Diskette Drive Signal Cable Continuity To check continuity of the diskette drive signal cable 1 Set the system unit s power switch to off 2 Check the diskette drive s sig
71. SIZE 0 512 1824 1536 2048 ENTER THE CORRECT EXPANSIon MEMORY SIZE To enter the correct expansion memory size perform the following two calculations 1 640Kb minus the amount of base memory installed in your system board 256Kb 512Kb or 640Kb 2 Amount of memory installed in your Expansion Adapter card minus the number found in Step 1 Note The amount of memory installed in your Expansion Adapter card is 512Kb for 0 5Mb 1024Kb for 1Mb 2048 for 2Mb 2 x 1024 3072Kb for 3Mb 3 x 1024 and so on The correct expansion memory size will be egual to the number found in Step 2 9 26 Example You are installing a 0 5Mb to 3Mb Memory Expansion Adapter with 3Mb of storage installed Your system board has 512Kb of storage The correct expansion memory size is 1 640Kb 512Kb 128Kb 2 3 x 1024Kb 128Kb 3072Kb 128Kb 2944Kb Expansion memory size is 2944Kb 9170 AT 370 7 20Mb Fixed Disk Drive So gt em Sen Keyboard LEX40132 Figure 9 46 5170 AT 370 The AT 370 is an extended version of the 5170 AT with 512Kb of memory on the system board The system unit has an AT 370 Adapter which consists of two cards plugged into adjacent expansion slots in the system board e The 512Kb Memory card PC 370 M2 e The Processor card PC 370 P2 Options available include e A Remote Display Terminal Device Emulation Adapter card e 3278 79 Emulation Adapter
72. ST After the initial installation and after each service call the servicer is reguired to do a com munication link checkout This is accomplished by fol lowing the procedure in the DunsPlus Installation and Service manual The checkout procedure for the com munication link is part of the DunsPlus software package The DunsPlus software must be installed prior to running the communication link checkout pro cedure Software Installation The IBM customer engineer will install the DunsPlus software from the customer supplied diskettes onto the fixed disk in the DunsPlus system This will be accom plished by first inserting the DunsPlus Installation and Service Diskette switching power on and then fol lowing the prompts on the menu driven screens The step by step instructions on installing the DunsPlus software are included in the DunsPlus Installation and Service manual DunsPlus Installation and Service Manual A copy of the DunsPlus Installation and Service manual will be shipped with each system and an addi tional two copies will be shipped to each IBM BO ser vicing DunsPlus installations The DunsPlus Installation and Service Diskette is included with the manual Maintenance The DunsPlus system will be serviced in a unique manner IBM customer engineers will provide on site installation of the hardware and software and on site service of the hardware The hardware is the same as other PC XTs except for two new adapt
73. Specifications Chapter 2 4860 PCjr 2 1 Interface Locations Interface Location Compact printer Compact printer Diskette drive Diskette drive adapter Display System board and 64Kb memory and display expansion Graphics printer Parallel printer attachment Internal modem Internal modem Joystick System board Light pen System board Memory System board and 64Kb memory and display expansion RS232C System board System board Figure 2 5 4860 Interface Locations System Board 64Kb Memory Expansion Connector Power Board Connector Left Side Internal Modem Connector Power Adapter Grounding nternal Modem Grounding Pins Diskette Drive Adapter Connector LE X40068 Figure 2 6 4860 System Board 2 2 The system board contains the following major func tional components e 8088 Microprocessor e 64Kb read only memory ROM 128Kb ROM cartridge interface 64Kb dynamic RAM e 64Kb memory and display expansion interface e Serial port RS232 e Audio alarm beeper e Sound subsystem Cassette interface Joystick interface e Keyboard interface Modem interface Diskette interface e Video graphics subsystem Light pen interface e I O expansion bus e 9 level interrupt Power Supply 1 Supply to 7 Diskette 4 Drive Input from Transformer 3 Grounding Pin Connector LEX40069 Figure 2 7 4860 Power Board Component Side The system power supply is a 3
74. The 0 5Mb to 3Mb Hardware Maintenance and Service HMS manual has been replaced with the 0 5Mb to 6Mb HMS The Hardware Maintenance Service manual for the 0 5Mb to 6Mb Memory Expansion Adapter G570 2239 might be confusing The switches on the adapter are rocker type switches A red dot is at each end of the switch To set the switch depress the red dot at the appropriate on or off end The opposite end will protrude making the red dot visible Example A switch set to the off position will have the dot visible at the on side of the switch After installing a 0 5Mb to 6Mb Memory Expansion Adapter you must run the setup function location on the diagnostic diskette Chapter 9 5170 Personal Computer AT 9 25 Boot the system using the diagnostic diskette and at the menu screen select Option 4 Set Up Function When the following screen is displayed BASE MEMORY IS COMPOSED OF 256KB 512KB 640KB OF BASE MEMORY CONSISTING AND 128KB on THE 128KB MEMORY EXPANSION OPTION BASE MEMORY SIZE IS XXXKB IS THIS CORRECT Y N Kk Note The line BASE MEMORY SIZE IS XXXKB will display 256 512 or 640 in the XXX position If XXX displays 640 answer yes The next screen will ask for expansion memory size If XXX displays any other number answer no The next screen will display ENTER CORRECT BASE MEMORY SIZE 256 512 640 Enter 640 at this screen The following screen will appear EXPANSIon MEMORY
75. a bl fF f ka Ed I MS4 416 15NL up 2k Ok Y Top View 8535 Through 8544 Numbering G Plant Affected Gx xxxxxxxx U singapore Bottom View LEX41870 64Kb memory module locations are designated by location numbers on the adapter card Refer to the 39 52 53 63 64 74 and 75 5150 4450 Failing Memory Module Bit Bank Location Connections Color 16 64K CPU or Trimmer 64Kb 256Kb Capacitor CPU Switch Block 2 Switch Block 1 16K or 64K mw Random a Access Memory sa Modules Pin 1 LEX40149 Figure 4 9 5150 4450 Memory Module Bit Bank Location 16Kb to 64Kb System Unit When there is a memory failure the address of the failure appears as a 4 character alphanumeric error code followed by 201 If the first character of the error code is 0 you have a system board failure The second character 0 4 8 or C indicates which bank has the failing module The third and fourth characters of the 4 character error code indicate which bit module of the bank failed P 0 1 2 3 4 5 6 7 For example Chapter 4 5150 PC 4 5 error code OC40 201 means that the module indicated by the arrow in Figure 4 10 on page 4 6 bank 3 bit 6 is the one that failed or N OO r O o r a al SUL Ul ili DDDDDDUC tli DODDDDDC ili QOQ00080 01 02 04 08 10 20 40 80 Last 2 characters of error code Top View of System Board LEX40150 Figure 4 10 System Board Top Vie
76. abled Chapter 9 5170 Personal Computer AT 9 23 Jumper Positions Function 1 and 2 Enable second 256Kb of system board RAM 2 and 3 Disable second 256Kb of system board RAM Figure 9 42 Jumper Positions The RAM jumper in the disable position 256Kb RAM enables the user to utilize additional RAM provided on option cards without fully populating the system board Note The normal position is enable mode The disable mode permits the second 256Kb of RAM to reside on adapters plugged into the I O bus This also pertains to cards like the Enhanced Graphics which have memory to support their function Type of Display Adapter Switch yor TTN Monochrome Display Color Graphics Display LEX40090 Figure 9 43 5170 System Board Video Switch Switch Bank 0 Switch Bank 1 LEX40256 Figure 9 44 5170 Memory Expansion Switch Bank Location 9 24 Switch Bank 1 Switch Bank 0 1st 512Kb Memory Expansion Adapter 2nd 512Kb Memory Expansion Adapter 3rd 512Kb Memory Expansion Adapter 4th 512Kb Memory Expansion Adapter 5th 512Kb Memory Expansion Adapter LEX40257 Figure 9 45 512Kb Memory Expansion Adapter Switch Settings 5170 Memory Adapters Switch ae Settings Definitions Base Memory Memory Address 0 640Kb Reserved Memory Memory Addresses 640Kb 1Mb Expansion Memory Memory Addresses 1Mb and up The purpose of the eight position switches on the Memory Ex
77. ack cover enclosing the drive when the Type 13 sticker is not present 10Mlb Fixed Disk Noise IBM manufactured Personal Computer fixed disks of 10Mb serial number F274092 or lower could create a high pitched noise IBM manufactured fixed disks with a serial number of F274092 or lower could produce a high pitched noise from the static eliminator during normal customer operation This will not cause any operational prob lems If your system is exhibiting this noise problem ensure that all data programs on the fixed disk are backed up Replace the fixed disk The drive can be identified by a black cover over the disk area and a label at the rear of the drive which reads Manufactured by IBM See ECA019 Formatting a Fixed Disk Drive Su Warning Formatting will destroy all data on the fixed disk drive After formatting your fixed disk drive the drive will have to be made ready to accept data Refer to your disk operating system manual for the needed commands The backup data may then be loaded onto the fixed disk drive Before replacing a failing fixed disk drive first try to format it then run the diagnostic tests again After formatting it perform the diagnostic tests Because formatting destroys all data on the drive do it as the last step before replacing the drive After you format the drive you may reload the data from your backup diskette To format a fixed disk drive 1 Set the power switch on the syste
78. acter of the error code is 0 1 2 or 3 you have a system board failure The 0 1 2 or 3 indicates which bank has the failing module The sixth and seventh characters of y ae the 7 character error code indicate which bit module of the bank failed P 0 1 2 3 4 5 6 7 For example error code 3COO0 40 201 means that the module indi cated by the arrow in Figure 4 13 bank 3 bit 6 is the one that failed Memory error memory lock or a blank display may occur if you plug one or more chips in wrong when you are replacing the system board or system memory Bits AN EUMHIE TEMBER EYE Handeni FNAB AGU 00 01 022 04 08 lO 20 4 Front Left Side Bank 1 Bank O Bank 2 Bank 3 LEX40153 Figure 4 13 System Board Top View 256Kb 640Kb System Board Memory Problems The E 2 jumper located next to the power supply on the system board is needed to support 256Kb modules in banks 0 and 1 Without this jumper 640Kb on the system board will appear in POST and diagnostics as 256Kb 256Kb 640Kb System Board Labeled Wrong PC XT 5160s Models 088 089 267 277 278 have some system boards labeled wrong The boards are labeled 64Kb 256Kb They should be labeled 256Kb 640Kb A 256Kb 640Kb board can be identified by looking for the presence of a module in position U84 The 64Kb 256Kb board has no module in this position Interrupt Level Information Interrupt levels are used by PCs to pri
79. ation code is provided by the user IBM provides I O driver code to interface between PC DOS and the 4683 002 I O devices The driver code is a licensed program that is not warranted by IBM It will be the user s responsibility to get it serviced The 4683 002 diagnostics have also been modified to run from the PC under PC DOS A new problem deter mination manual BM 4683 Model 002 Attachment Adapter System Problem Determination Manual SA27 3790 is shipped with each feature This docu ment tells how to run and interpret the diagnostic and verification tests and how to configure the user s system for the unique I O configuration The diag nostic results error messages symptoms will be com patible with the diagnostic results for the 4680 system The IBM customer engineer must be aware however that the PC controller and the 4683 2s will be offline to the user while the diagnostics are being run It is pos sible for the application coder to include the capability of running the application and the diagnostics concur rently but this should not be assumed System Board The system board for the Models 839 and 899 uses a 6 MHz oscillator The Models 819 and 849 use an 8 MHz oscillator All of these models use the Intel 80286 E Step Microprocessor When operating the controller with the 4680 program products the E Step Micro processor allows multitasking Due to this program requirement other system boards part numbers cannot
80. before using Test stops immediately Message Keyboard them to abort the test Test stops immediately Message is Joystick Test stops immediately Message Light pen is Figure 2 17 Response Messages The FFFF message lets you know that the test was stopped before completion When you want to remove the advanced test menu from your screen press and hold the Ctrl and Alt keys and then press the Del key Customer Error Codes When reguesting service customers may reference an error code found in the Error Message Table on page 6 17 of the Guide to Operations GTO manual These are not advanced diagnostic error codes and cannot be found in the Hardware and Maintenance Service HMS manual A list of the codes follow Action Have system serviced Keyboard problem move away fram bright light Cassette problem if the cassette is not in use press Enter and continue Modem problem if modem is not reguired press Enter to continue These errors are for reference only Actual failures should be determined by using the advanced diagnos tics Power Diagnostic Tips Diskette Drive Voltage at the Power Board The voltages at the diskette drive power cable con nector on the power board should be within the ranges listed below Low V DC High V DC 12 6 5 3 Figure 2 18 Diskette Drive Power Board Voltage Levels Pin 1 to Pin 2 11 4 Pin 4 to Pin 3 1 4 7 Chapter 2 48
81. ctrical Nominal Minimum Maximum Keyboard Size Height Length Depth Weight 142 mm 5 5 in 500 mm 19 6 in 410 mm 16 1 in 14 5 kg 32 lb 1 83 m 6 ft 18 AWG 15 6 to 32 2 C 60 to 90 F 10 to 42 C 50 to 110 F 8 to 80 20 to 80 650 BTU hr 49 5 dBa System unit with monochrome display and expansion unit attached 120V AC 104V AC 127V AC 57 mm 2 2 in 500 mm 19 6 in 200 mm 7 87 in 2 9 kg 6 5 lb Figure 6 16 5160 XT 370 Specifications 6 18 PC 3277EM Card LEX40129 Figure 6 17 PC3277EM Card Used in PC XT 370 only The PC 3277EM card allows the PC XT 370 to emulate a 3277 2 terminal when the PC XT 370 is linked to a host system This card also allows additional func tions to those of the 3277 when supported with suitable software These additional functions include the ability to print single screens complete listings or other files on the PC XT printer and the ability to transfer data between the PC XT 370 and the host lt system disks i PC 370 P Card LEX40130 Figure 6 18 PC 370 P Card The PC 370 P card is the center of the S 370 operations for the PC XT 370 The PC 370 P card contains the microprocessors and control circuits that enable the oy PC XT 370 to execute S 370 instructions PC 370 M Card LEX40131 Figure 6 19 PC 370 M Card The PC 370 M card contains 512Kb of parity checked random access memory RAM
82. cur with both the color and monochrome monitors The transformer creates a mag netic field around the PC which causes the errors The preferred solution to the problem is to move the display if this cannot be done replace the failing diskette drive Some of the diskette drives are less sus ceptible than others to this problem Chapter 4 5150 PC 4 9 Track 40 Error Type 3 Drives Diskette Drive Cable Continuity 1 Set the meter on the ohms x 1 scale 2 Refer to Figure 4 19 and check the continuity of the signal cable The meter should indicate approximately 0 ohms The Type 3 diskette drive will not read data from track 40 of diskettes The IBM specifications allow the use of tracks 0 39 and the Type 3 drive meets these spec ifications The use of track 40 or above is not sup ported by IBM Some software vendors have used k 40 in thei ft k ae Rig cept ear we re elo Diskette Drive A Diskette Drive A da l Signal Cable C t Signal Cable C t The Type 3 drive can be identified by a large heat sink ee diu saa za anal aa acai aa on the rear of the drive logic board Further identifi Even Pin Numbering Odd Pin Numbering Diskette Adapter Diskette Adapter cation can be made by checking for an E at the begin ning of the serial number The serial number on the Type 3 drive is located inside the drive on the right front corner and is visible through the top of the drive with the diskette removed and the diskette latch open DISKCO
83. cylinder by redoing DOS FDISK with new values Otherwise the disk must be replaced DOS 3 1 will automatically start loading the system files beyond the defective cylinder It will be transparent to the customer To use the following Symptom Action table locate the symptom in the column on the left Read across the row and perform the steps in the order given until the problem is resolved With the exception of System Won t Boot from Fixed Disk all symptoms and actions are applicable to either fixed disk drive C or D Nou a Steps Symptom 1 2 3 Post Error 1780 or 90 ata at st Post Error 1782 5 Cold Start Problem System Won t Boot from Fixed Disk Read Write Errors Fixed Disk Write Fault or 1706 Error Code Files or Data Lost Intermittent Errors Track 0 Error during DOS Format pete pat fell ad il Ul Fo ea l2el l a 712 PE Figure 9 33 Symptom Action Table Fixed Disk Trouble Shooting Perform the following steps to determine the cause of fixed disk problems 1 Initial checkout a b Power off the system unit and remove the system unit cover Power on the system unit and load the Per sonal Computer AT Advanced Diagnostics Diskette and select the FIXED DISK DRIVE S and ADAPTER test Select Option 6 READ VERIFY If a 1796 error occurs see Fixed Disk Write Fault in Figure 9 33 If any tracks or cylinders between 1and 10 are flagged defective or
84. directional signal lines and one wire used as a reset line The cable is approximately 182 88 cm 6 ft long and coiled like that of a telephone handset The keyboard uses a capacitive technology with a microprocessor Intel 8048 performing the keyboard scan function The keyboard has two tilt positions for operator comfort 5 or 15 degree tilt orientation The keyboard has 83 keys arranged in three major groupings The central portion of the keyboard is a standard typewriter keyboard layout On the left side are 10 function keys These keys are defined by the software On the right is a 15 key keypad These keys are also defined by the software but have legends for the functions of numeric entry cursor control calcu lator pad and screen edit The keyboard interface is defined so that system soft ware has maximum flexibility in defining certain key board operations This is accomplished by having the keyboard return scan codes rather than American Standard Code for Information Interchange ASCII codes In addition all keys are typematic if held down they will repeat and generate both a make and a break scan code For example key 1 produces scan code hex 01 on make and code hex 81 on break Break codes are formed by adding hex 80 to make codes The keyboard I O driver can define keyboard keys as shift keys or typematic as required by the application ae a The microprocessor in the keyboard performs several funct
85. drive 1 Check the voltages at the diskette drive s power connector as shown below Note If the system unit has two diskette drives check the voltages at both connectors 2 Check the voltages at the failing fixed disk drive s power connector as shown below Min V DC Max V DC Lead Figure 9 38 Correct Voltage at Connectors LEX40178 Figure 9 39 Power Connector Locations Fixed Disk Signal Data Cables Continuity To check continuity of the fixed disk signal data cables 1 Turn the system unit s power switch to off 2 Remove the system unit s cover 3 See Figure 9 40 and check the fixed disk drive s data and signal cables for continuity Fixed Disk Drive LEX40179 Data Cable LE X40180 Figure 9 40 Signal Data Cable Continuity Check Points Stack Errors Using DOS 3 1 and 3 2 A fatal stack error can occur in DOS Release 3 1 and 3 2 DOS 3 2 defaults to nine stack pages nine successive depressions of the pause key cause an error The depression of any other key resumes operation and clears the stack The situation also occurs with DOS 3 1 However no error message is given 5170 Model Identification A variety of problems can occur if replacement parts for Personal Computers are installed in the wrong model The following is an example e Installing a 5170 Model 239 System Board P N6480170 in a 5170 Model 339 will result in the incorrect operation of the 101 key keyboard
86. e Display and two separate con nectors for power to the 5 25inch diskette drives The two different power supplies available are designed for continuous operation at 63 5 watts They have a fused 120V AC or 220 240V AC input and provide four regulated DC output voltages 7 A at 5V DC 2 A at 12V DC 0 3 A at 5V DC and 0 25 A at 12V DC These outputs are overvoltage overcur rent open circuit and short circuit protected If a DC overload or overvoltage condition occurs all DC outputs are shut down as long as the condition exists The 12V DC and 12V DC power the EIA drivers and receivers on the Asynchronous Communications Adapter The 12V DC also powers the system s dynamic memory and the two internal 5 25 inch diskette drive motors It is assumed that only one drive is active at a time The 5V DC powers the logic on the system board and diskette drives and allows about 4 A of 5V DC for the adapters in the system unit expansion slots The 5V DC is for dynamic memory bias voltage it tracks the 5V DC and 12V DC very quickly at power on and has a longer delay on power off than the 5V DC and 12V DC outputs All four power supply DC voltages are bussed across each of the five system unit expansion slots Keyboard The IBM Personal Computer keyboard has a perma nently attached cable that connects to a DIN con nector at the rear of the system unit This shielded 5 wire cable has power 5V DC ground two bi
87. e Drive Adapter T Printer Adapter Monochrome and Printer Adapter Cluster Adapter selected by a jumper Serial Parallel Adapter Parallel Port General Process Interface Bus GPIB Adapter s Data Acquisition Adapter s D If you find two cards with the same interrupt remove one of them and see whether the failure symptom disappears These steps are similar to the intermittent problem steps in the HMS manual The most important point of this tip is that when a failure symptom is isolated to Chapter 4 5150 PC 4 7 one adapter card that card is not necessarily defec tive but may be incompatible with the other cards in the PC Incompatibility can also be caused by factors other than interrupt such as memory address and DMA Also conflicting interrupts will not always cause failures Note Some adapter cards have a jumper for interrupt selection For those cards and for cards not listed here including non IBM cards see the card s setup guide or technical specifications Due to rapid product announcements this list cannot describe all the avail able IBM PC option cards Math Coprocessor Installation 5150 Only Installation of the math coprocessor feature requires the replacement of the 8088 Processor module on the system board and addition of an 8087 Math Coprocessor module If the 8088 Processor is soldered to a 16Kb 64Kb system board P N8529205 or P N8529328 which prevents installation of a new 8088 th
88. e Drive Switch Settings The following are the settings for positions 7 and 8 switch 1 is always on L gt CI L iw CJA L___ um Lo CE CLE o gt gt omes HUN somes I UU MM somes HJ UUN LEX40240 Figure 4 25 5 25Inch Diskette Drive Switch Settings Extender Card Switch Settings The following chart shows the switch settings of the extender card switch block in conjunction with memory of various sizes System Extender Card Memory Switch Block Segment TU I NEAN N A gt za CH UN z gt zo IE LE Eic CH zO tO CE C EE 1 El Cou je C EE CH EU gt 20 CH mu S ED CE ER Mes C RO CH i jw Ee xo Cw UN C gt zo O E i Cni C Mca CC Cm a LEX40194 Figure 4 26 Extender Card Switch Settings 4 16 SN27 0786 00 21 July 1989 to SA38 0037 00 aw Switch Settings System Board Memory 16Kb 64Kb CPU a The following figures show switch settings for a range of system board memory from 16Kb to 64Kb plus addi tional memory up to 576Kb 16Kb Total Memory had 45578 System Board Switches Switch Block 1 i 1 I HUN bwitch Block 2 LEX40195 32Kb Total Memory System Board Switches Switch Block 1 R Switch Block 2 LEX40196 48Kb Total Memory A System Board Switches Switch Block 1 Switch Block 2 LEX40197 64Kb Total Memory 1234567
89. e addresses only those items However good judgment should be used to identify potentially unsafe conditions not covered by this inspection guide If any unsafe conditions are present a determination must be made on how serious the apparent hazard could be and whether you can continue without first correcting the problem Consider these conditions and the safety hazards they present Electrical hazards especially primary power primary voltage on the frame can cause serious or fatal electrical shock e Explosive hazards a damaged CRT face or bulging capacitor can cause serious injury Mechanical hazards loose or missing hardware can cause serious injury IBM Personal Computer 5150 51 60 Based Systems To inspect the IBM Personal Computer 1 Set the power switch to off and disconnect the power cord from the electrical outlet 2 Check the exterior covers for damage loose broken or sharp edges 3 Check the power cord for the following a A third wire ground connector in good condi tion Use a meter to measure third wire ground continuity for 0 1 ohms or less between the external ground pin and the frame ground as specified in the Hardware Maintenance Library b The cord set should be the appropriate molded type as specified in the Hardware Maintenance Library c Insulation must not be frayed or worn 4 Remove the cover mounting screws from the rear panel and remove the cover 5 Check for any obviou
90. e board must be replaced with a new 16Kb 64Kb system board from stock See ECA004 Speaker Continuity 1 Set the power switch on the system unit to off 2 Set your meter to the ohms x 1 scale 3 Remove the speaker connector from the system board 4 Connect the meter leads to the speaker as shown to check for continuity System Board Bank 2 Bank 5 d UUUUL O o W NE T Beer 2 i o o A ee Speaker LEX40160 Figure 4 14 Speaker Continuity Check 4 8 Keyboard Voltage Check at System Board Pin TTL Signal 1 Keyboard Clock 2 Keyboard Data 3 Keyboard Reset Not used by keyboard Power Supply Voltages Voltage 4 Ground 0 5 5 Volts 5V DC Signal Level 5V DC 5V DC Figure 4 15 Keyboard Interface Connector Specifica tions 5150 Rear Panel Keyboard Connector 5 Pin DIN Connector LEX40161 Figure 4 16 Keyboard Connector Location 5155 Portable Keyboard Voltage NN Check Keyboard Cable Connections DIN Modular Keyboard Connector Connector Connector LA 1 0 olg O 4 o O 5 2 LEX40162 Figure 4 17 Keyboard Cable Connections Connector 65432 1 Modular Connector LEX40163 Figure 4 18 Modular Connector Location Diskette Drive Fixed Disk Drive Diagnostic Tips Hard Sector Diskettes Hard sectored double index hole diskettes will not work with IBM PC products Soft sectored single index hole diskettes
91. e drive can be installed in a 5162 to provide an online diskette capacity of 2 4Mb The two drives attach to the Fixed Disk and Diskette Drive Adapter The second high capacity diskette drive has the same characteristics as the standard high capacity diskette drive The second high capacity diskette drive is installed below the standard high capacity diskette drive in the 5162 and addressed as drive B It is mutually exclusive with the 5 25 inch 360Kb diskette drive 3 5 inch internal diskette drive and the 4865 Model 002 External 3 5 inch Diskette Drive Chapter 8 5162 PC XT Model 286 8 3 The high capacity diskette drive uses a different 5 25inch diskette from that used in the IBM PC config urations with the 8088 Microprocessor to achieve a 1 2Mb capacity This drive can also read from both sides of a double sided 320Kb 360Kb capacity 5 25inch diskette or from one side of a single sided 160Kb 180Kb capacity 5 25 inch diskette However if these diskettes have been written on by a high capacity diskette drive they might not be readable Note Diskettes designed for use in this drive cannot be used in either a 160Kb 180Kb or 320Kb 360Kb diskette drive in the 1 2Mb mode 5 25 Inch 360Kb Diskette Drive One 5 25 inch 360Kb diskette drive can be installed in a 5162 System Unit in addition to the standard high capacity diskette drive It attaches to the Fixed Disk and Diskette Drive Adapter and is offered to read and write 5 25
92. ead the two tabs apart while lifting at a slight angle on the memory module package Retention Tab LEX42509 Figure 8 13 Memory Module Package 5162 PC XT 286 Switch Setting Information For further information on Memory Expansion Adapter switch settings refer to Chapter 17 Chapter 8 5162 PC XT Model 286 8 7 Chapter 9 5170 Personal Computer AT Fixed Disk Drive A ma p KRD Des ra ASA xz Ses d MAA WN EP es FS xy PA LS Keyboard LEX41703 Figure 9 l 5170 Personal Computer AT The 5170 Personal Computer AT features the 32bit 80286 Processor 7 channel direct memory access DMA 12SKb read only memory ROM 256Kb or 512Kb random access memory RAM on system board RAM expandable to 3Mb with 512Kb Memory Expan sion options eight I O slots Keyboard one 1 2Mb high capacity diskette drive a 20Mb or 30Mb fixed disk drive and a keylock for security System Differences This section shows the differences between the IBM Personal Computer AT and the rest of the IBM Per sonal Computer family 5170 Base Models There are five base models of the Personal Computer AT the different models can be identified by serial number ranges Serial Number Range 5000000 5999999 0000001 0999999 6000000 6999999 919 339 7000000 7999999 Unit Specifications System Unit Size Height Length Depth Weight Power Cable Length Size Environment Air Temperature
93. ect the FIXED DISK DRIVE S AND ADAPTER test d Select option 5 RUN ALL TESTS Select option 6 READ VERIFY f If any errors occur refer to the Personal Com puter AT Hardware Maintenance and Service manual o If DOS is installed ensure that the system will boot properly from the fixed disk If this is a replacement fixed disk and DOS is not installed it is recommended that DOS FDISK and DOS FORMAT be performed by the customer or an IBM customer engineer to load the DOS system files Ensure that the system will then boot properly from the fixed disk before returning the system to the customer or leaving the cus tomer location g Return to the main diagnostic menu and select option 3 PREPARE SYSTEM FOR MOVING h Power the system unit off Formatting a 5170 Fixed Disk 20Mb 30Mb Before replacing a fixed disk attempt to format the disk as follows Warning Formatting results in complete loss of data Refer to the DOS manual and back up all data if pos sible L 2 Ensure that all power and data cables connected to the diskette drive s and fixed disk are tight Load advanced diagnostics select option SYSTEM CHECKOUT and verify that the installed option list is correct Select option 17 FIXED DISK AND ADAPTER Select FORMAT MENU enter desired drive and select CONDITIONAL FORMAT Always perform conditional format first If CON DITIONAL FORMAT fails to complete UNCON DITIONAL FORMAT should be
94. ed 1 64 256K optin with 128K installed 1 64K option Pon 1 64 256K option with 256K installed 1 64 256K option with 192K installed LEX40212 The switch setting for the 256Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed Chapter 4 5150 PC 4 29 544Kb Total Memory 480Kb 64Kb on System Board 342345678 52345678 swith Block 1 FATT WOU Ser ot fit Ad 266K Option or 64K Opti i l ption 32K Option 64 256K Option Card Switches Card Switches Card Switches 1 64 256K option with 256K installed i 1 64 256K option with 192K installed 1 32K option a The switch setting for the 256Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed System Board Switches LEX40213 576Kb Total Memory 512Kb 64Kb on System Board System Board Switches Switch Block 1 256K Option or 64 256K Option Card Switches 1 64 256K option with 256K installed 1 64 256K option with 192K installed 1 64K option 2 64 256K option with 256K installed LEX40214 The switch setting for the 256Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed 4 30 608Kb Total Memory 544Kb 64Kb on System Board WY System Board Switches Switch Block 1 256K Option or 32K Option 64 256K Option Card Switches Card Switches 2 64 256K option with 256K installed 1 32K option LEX40215 The switch settin
95. er being powered on for 2 or more hours then properly work after power off and the machine cools down If this problem is experienced the power supply must be replaced S 8 System Board Voltage To w N e 4 5 Check for a voltage of 2 4V to 5 2V DC check the system board voltage Set the system unit s power switch to off Remove the system unit s cover Set your meter to the 12V DC scale Connect the common lead to pin 5 and the voltage lead to pin 1 on the system board s power connector P8 Set the system unit s power switch to on Check the rest of the power supply voltages at the system board 1 Set your meter to the 12V DC scale 2 Refer to Figure 9 17 and check the system board s power connectors for the correct voltages Voltage Connectors Min V DC System Board Connectors GAA wan o 0m e gt ao mw LEX40177 Figure 9 18 System Power Supply Battery Voltage To check battery voltage 1 Set the system unit s power switch to off 2 Remove the system unit s cover 3 Disconnect battery from system board 4 Set your meter to the 12V DC scale Connect the common lead to pin 1 and the voltage lead to pin 4 on the battery connector Check for a voltage of 6 0V DC minimum Note A 161 Battery Defective or New Battery Installed message appears during the first POST after a battery installation or replacement If you just installed a n
96. ernal Modem Test Compact Printer Test Serial Port Test Keybdard Test Cluster Test LEX40138 Figure Z 12 Advanced Test Symbols Chapter 2 4860 PCjr 2 5 Some symbols and IDs appear on the advanced test menu only when their particular options are attached to the system unit If you see an in the lower right hand corner of the advanced test menu the menu has another page of symbols When the cursor is moved to the last ID on the screen moving it again causes this next menu page to appear On the last menu page an Q is in the lower right hand corner When the cursor is moved to the last ID on this screen moving it again causes the first menu page to reappear O aera LE X40139 Figure 2 13 Last Menu Page When the IBM PCjr senses the presence of a device interface the ID under the symbol for that device blinks The device interface is the electronic circuitry necessary for the system unit to control a particular device In Figure 2 14 the interfaces for diskette drive display joystick and sound are sensed LEX40140 Figure 2 14 Interface Device Sensory 2 6 The IDs for joystick and sound always blink because their interfaces are on the system board The blinking does not mean a joystick or external speaker is installed The diskette drive interface is on the diskette drive adapter The ID under the diskette drive symbol there fore blinks only when the diskette drive adapter is insta
97. ers that have their own diagnostics and PICs Both installation and service will be directed by the DunsPlus Installation and Service manual in conjunc tion with the PC XT HMS manual Some of the DunsPlus diagnostics are installed on the advanced diagnostic diskette and some are installed on the fixed disk The diagnostics installed on the fixed disk are maintained by DunsPlus The unique diagnostics that are on the advanced diagnostic diskette can only be invoked after the diagnostic program senses it is being run on a DunsPlus system A DunsPlus support center will provide an interface between a DunsPlus user and IBM customer engineer The DunsPlus support center will provide the IBM cus tomer engineer with FRU element exchange informa tion when placing a service call The IBM customer engineer will also be furnished with the DunsPlus host dialing sequence to be used in testing the communi cation link and to report service call information at the completion of each service call The DunsPlus Installation and Service manual and its own special diskette will be shipped with each system as part of the shipping group Service Cal Is Service calls are placed via DunsPlus customer support which screens the calls prior to notifying IBM Installations are handled in the same manner Using this technique DunsPlus customer support will not only minimize installation problems but also reduce unnecessary service calls Whenever possible t
98. ew battery run the setup program When checking the battery voltage you must discon nect the battery from the system board The drain from the system board will cause various readings if you attempt to check the voltage with it plugged into the system board LEX40182 Figure 9 19 Battery Voltage Check System Memory Diagnostic Tips Blank Display No Beep During Power On Reset POR Some 5170 planar boards were manufactured in error with the math coprocessor socket installed with the notch to the rear of the board The installation instructions state to align the coprocessor notch to the socket notch If the coprocessor is installed with the notch to the rear the system will fail during power on diagnostics the display will be blank and there will be no beep Installing the coprocessor with the notch to the front of the planar will correct this problem Interrupt Levels Interrupt levels are used by PCs to prioritize oper ations and are also known as groups or interrupt requests IRQs Diagnostics will not necessarily fail on a PC with interrupt conflicts yet the operator will keep getting errors Although the customer is respon sible for solving interrupt conflicts an IBM customer engineer can use this information to reduce diagnostic time no trouble founds NTFs unnecessary parts replacements and callbacks To determine if an unusual PC problem is caused by conflicting interrupt levels follow these steps 1
99. expansion slot 8 is expected to respond with a card select signal Only one IBM Card provides this signal the Asynchronous Communi cations Adapter In order to provide this signal jumper J13 must be installed on the card Any card not providing this signal will not be recognized Expansion Unit Cable q LEX40082 Figure 7 5 Expansion Unit Cable 7 2 The expansion unit cable consists of a 56 wire foil shielded cable terminated on each end with a 62 pin D shell male connector Either end of the expansion unit cable can be plugged into the extender card or the receiver card Extender Card Switch Settings The following chart shows the switch settings of the extender card switch block in conjunction with memory of various sizes The adapter is found inside the system unit not in the 5161 Expansion Unit System Extender Card Memorv Memory Switch Block Segment 123 4 16K to 64K R es inlaid 1 23 4 ee BR LEX40194 Figure 7 6 Extender Card Switch Settings N Nel j Extender Card P N6323445 LEX40083 Figure 7 7 Extender Card Right View The Extender card is a four plane card It redrives the I O channel to provide sufficient power to avoid capacitive effects of the cable The Extender card pre sents only one load per line of the I O channel The Extender card has a wait state generator that inserts a wait state on memory read and memory write operations except refreshing for all me
100. f air At the same time look at the victim s chest and upper abdomen to see if they move up and down If the victim is not breathing correctly and you decide that you want to give rescue breathing 3 Continue to press on the victim s forehead with your hand and pinch together the victim s nostrils with the thumb and finger 4 CAUTION Use extreme care when giving rescue breathing to a victim who possibly has breathed in toxic fumes Do not breathe in air that the victim has breathed out Open your mouth wide and take a deep breath Make a tight seal with your mouth3 around the victim s mouth El and blow into it 2 If you want to be trained in giving this aid ask a suitable organization such as the Red Cross in your area 9 A rescue breathing face covering mask or similar unit can be used if you have been taught how to use it Safety V 5 Remove your mouth and let the victim_breathe out while you check that the victim s chest moves down 6 Repeat steps 4 and 5 once every 5 seconds until the victim breathes normally again or until medical aid comes Reporting Accidents Report to your manager or to your IBM site all acci dents possible hazards and accidents that nearly occurred Remember An accident that nearly occurred can be caused by a design problem Quick reporting ensures quick solving of the problem Report also each small electric shock because the con ditions that caused it
101. former s power cord to a functioning properly grounded outlet 4 Install all connectors securely in their proper locations l 5 Remove any cartridge cassette or diskette from the system unit and attached devices 6 If the cordless keyboard is being used without its optional keyboard cord e Position the keyboard within 12 inches of the front of the system unit e Remove any obstructions between the infrared Internal Modem IR emitter in the back of the keyboard and the IR receiver on the system unit 7 Plug the service plug into the system unit J con Adapter Adapter Turn the display s brightness contrast and volume controls to midrange Set the display s power switch to on Set the system unit s power switch to on Ensure that Service Plug is good and installed correctly Repeat advanced POST If same message replace System Board Advanced POST begins as soon as the system unit power switch is set to on It takes as long as 1 minute to complete While advanced POST is running You see a stable IBM logo and 16 color test pattern on your screen 2 9 4360 PCjr Advanced POST Error Table Mil ull I HHI nll eet rae eee ar LEX40136 Figure 2 10 Screen Test Pattern If advanced POST detects a failure you will receive an incorrect audio response no beep two beeps or three beeps an incorrect screen an error message or any combination of these In these cases see
102. g for the 256Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed 640Kb Total Memory 576Kb 64Kb on System Board System Board Switches Switch Block 1 256K Option or 64 256K Option Card Switches 2 64 256K option with 256K installed 1 64K option 2 64 256K option with 256K installed 1 64 256K option with 64K installed 1 23 5678 RR WN LEX40216 The switch setting for the 256Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed Chapter 4 5150 PC 4 31 Switch Settings System Board Memory 64Kb 256Kb CPU 64Kb Total Memory 2345678 ob Za 428678 System Board Switches Switch Block 1 TWF TODDI Switch Block 2 ah PI LEX40217 128Kb Total Memory Switch Block 2 ih i tal Switch Block 1 i ifi i i i LEX40218 LEX40219 LEX40220 64 256K Option 64K Option i Card Switches Card Switches 12545678 _ 1 32K option NENHEAUH LEX40221 4 32 32K Option Card Switches N Yl 320Kb Total Memory 64Kb 256Kb on S system Board Switches Switch Block 1 l 64 256K Option Card Switches 1 64 256K option with 64K installed 1 64K option 2 32K options ystem Board Switch Block 2 64K Option 32K Option Card Switches Card Switches LEX40222 Chapter 4 5150 PC 4 33 352Kb Total Memory 96Kb 256K System Board Switches 64 256K option with 64K installed 32K options 1
103. gure 9 14 5170 System Board Full Size Top View Full Size Dimensions 13 5 x 12 Down Size Dimensions 13 5 x 9 5 not shown Input Voltage Reguirements The 115 230V AC selector switch at the rear of the system units power supply must be set for the voltage present at the outlet Chapter 9 5170 Personal Computer AT 9 7 Switch Position Voltage Range 115V AC 100 to 125V AC 230V AC 200 to 240V AC Figure 9 15 Input Voltage Switch Page Ballpoint LEX40166 Figure 9 16 Input Voltage Switch Location Removal of Locked Cover To remove the top cover when the lock is in the locked position the 5170 must remain on a flat surface The five cover screws in the rear of the system unit must be removed before performing this procedure Locate the system unit to gain access to approximately 3 inches of the bottom of the unit at the front side There is a small gap between the frame and the top cover underneath the system unit While standing in front of the system unit insert a screwdriver in this gap from the bottom going up approximately 2 to 3 inches in line with the lock Pull the screwdriver toward you and in an upward motion This will raise the cover lip over the lock latch and the top cover can now be removed To run diagnostics under this condi tion remove one wire from the lock switch This will enable the keyboard Power Diagnostic Tips Power Supply Failures Some 5170 power supplies might fail aft
104. hazard before you start work If you need to work on a machine that has exposed electrical circuits observe the following precautions Ensure that another person who is familiar with the power off controls is near you Remember Another person must be there to switch off the power if necessary CAUTION Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical cir cuits Use only those tools and testers that are suit able for the job you are doing Use only one hand when working with powered on electrical eguipment keep the other hand in your pocket or behind your back Remember There must be a complete circuit to cause electrical shock By observing the above rule you may prevent a current from passing through the vital parts of your body When using testers set the controls correctly and use the IBM approved probe leads and accessories intended for that tester 1 Trademark of the Gardner Denver Co iV CAUTION Many customers have near their eguip ment rubber floor mats that contain small ecto conductive fibers to decrease electrostatic discharges Do not use this wrong type of mat to protect yourself from electric shock Stand on suitable rubber mats obtained locally if necessary to insulate you from grounds such as metal floor strips and machine frames Observe the special safety precautions when you work
105. he IBM customer engineer will be asked to bring a particular FRU to a service call again minimizing outage Chapter 6 5160 PC XT 6 15 Electronic Call Reporting The IBM customer engineer will supply the DunsPlus support center via direct entry into the DunsPlus system the following information e Machine type and serial for repairs element exchange and installations e Major code for FRU replacement incidents Internal IBM incident reporting will remain the same DunsPlus Hardware Two new pieces of hardware and a specific hardware rule are part of the DunsPlus system e The Internal Modem Adapter is a microprocessor based modem that operates at 300 or 1200 bps and provides auto dial and auto answer capabilities The Printer Register Adapter is like the Parallel Printer Adapter with special register for DunsPlus system security It is not interchangeable with a Parallel Printer Adapter Internal Modem Adapter LEX40044 Figure 6 10 Internal Modem Adapter The Internal Modem Adapter contains auto call logic that is used by the customer to establish a connection with the host system The DunsPlus documentation may refer to autocall as Dialer or Auto Dialer The Internal Modem Adapter functions as an alternate Asynchronous Communications Adapter with a built in modem The advanced diagnostic tests identify this adapter as Alt Async Communications Adpt on the Installed Devices screen When the advanced diagnos t
106. he underside of the diskette drive To adjust the speed carefully insert an insulated screwdriver into the resistor s slot Turn the screw until the speed shown on the screen is within the reguired specifications Variable Resistor LEX40176 Figure 9 30 Diskette Drive Bottom View Erroneous Diskette Drive Failures If a diskette drive failure is reported and replacing the drive and or the adapter card does not resolve the problem remove the cables from the fixed disk drive and remove the fixed disk from the setup table Rerun the diagnostics and or have the customer rerun the job If no failures occur replace the fixed disk drive Formatting Scratch Diskettes The 5170 Advanced Diagnostic Diskette includes an option to format a scratch diskette for diagnostic use When performing this routine the proper diskette media must be used to ensure reliable results Other wise CRC errors might occur during the format routine Use the following diskettes for reliable results e 1 2Mb drive use only high capacity scratch diskettes e 360Kb drive use only dual density scratch diskettes Note The 5170 Diagnostic Diskette is a dual density diskette Dual density diskettes P N6023450 and high density diskettes P N6109660 can be ordered through administrative personnel as a supply item not as a repair part or tool Customers experiencing diskette format errors under DOS should verify that they are correctly using the DO
107. her unreliable operation will occur or the product cannot perform the function Chapter 1 General Information 1 3 TWN a LLL gt gt 7_ 1 Wear the ESD wrist band any time ESD sensitive Diskette Care devices are handled This will place your body the option and the system unit at the same ground The figure below shows proper and improper ways of potential thus preventing an accidental static dis handling your diskettes Proper handling will greatly charge reduce the possibility of damaging them Proper Grasp by When Not in Use Corner No Pencils No LEX40289 Clips No Figure 1 6 Anti Static Bag Removal 2 Carefully remove the option from its anti static bag Be sure to grasp circuit boards by the edges only do not touch the component pins or solder joints Grasp diskette drives by their frames to avoid touching the electronics board Grasp chips by their narrow ends only not by their pins LEX40287 Figure 1 4 Diskette Handling Procedures Handling Static Sensitive Devices Some of the components that make up the options for your IBM Personal Computer can be damaged by electrostatic discharges To prevent this damage the options are wrapped in a conductive anti static bag certain precautions must be taken before removing an option from its bag LEX40290 Figure 1 7 Option Insertion 3 When inserting an option adapter into the system board hold the adapter by its top edge or
108. ht cause read write errors on the fixed disk If READ VERIFY still shows any tracks as UNABLE TO READ a CONDITIONAL FORMAT might be required to remove the bad data d Go to Step 8 on page 9 19 of this section 6 Replace Fixed Disk Drive a Load the advanced diagnostics and select option 3 PREPARE SYSTEM FOR MOVING b Remove the failing fixed disk drive and install the replacement c Power on the system unit and load the advanced diagnostics and select the FIXED DISK DRIVES S AND ADAPTER test d Select option 5 RUN ALL TESTS e Select option 6 READ VERIFY f If the replacement drive fails remove and reseat all cables and retest the drive prior to replacing it g Go to Step 8 on page 9 19 of this section Note If UNABLE TO READ problems persist after the fixed disk is replaced it might indicate a defective disk drive or the problem New might be caused by a defective Fixed Disk Diskette Drive Adapter or power supply 7 Fixed Disk Drive Format Warning Formatting results in a complete loss of data on the fixed disk drive refer to the DOS manual and ensure that all customer information has been backed up Note CONDITIONAL FORMAT UNCONDI TIONAL FORMAT and SURFACE ANALYSIS will post the current cylinder number as they move through their routines If the time between cylinders is greater than 5 seconds replace the Fixed Disk Diskette Drive Adapter see Step 5 on page 9 18 and perform a CON
109. hter outlet in a vehicle with a 12V negative ground electrical system Options FEDD Adapter Parallel Printer Adapter y Printer LEX41041 Figure 3 3 Option Configuration IBM PC Convertible Printer The IBM PC Convertible Printer is a matrix printer designed to attach to the back of the IBM PC Convert ible and to draw its power from the system unit s battery pack An all points addressable APA mode is provided for graphics IBM PC Convertible Monochrome Display The IBM PC Convertible Monochrome Display is a 9 inch composite video display with 80 x 25 and 40 x 25 text modes and 640 x 200 and 320 x 200 graphics support IBM PC Convertible Color MM Display Nyfer The IBM PC Convertible Color Display is a 13 inch RGBI direct drive display with 320 x 200 lines graphics support and text modes of 40 x 25 and 80 x 25 The display includes a speaker for external audio output IBM PC Convertible Cathode Ray Tube CRT Display Adapter The IBM PC Convertible CRT Display Adapter attaches to the IBM PC Convertible and is operable when the system is powered with the AC Adapter The IBM PC Convertible Monochrome Display the IBM PC Convertible Color Display the IBM Personal Com puter Color Display and the IBM PCjr Color Display are supported IBM PC Convertible Internal Modem The IBM PC Convertible Internal Modem gives users the capability of communication between the IBM PC Convertible and other compat
110. ible systems over existing telephone lines at speeds of either 300 or 1200 baud IBM PC Convertible Serial Parallel Adapter The IBM PC Convertible Serial Parallel Adapter pro vides an RS232C asynchronous communications inter face and a parallel printer interface Supported Options The IBM Personal Computer options that are sup ported on the IBM 5140 are e IBM 5152 Graphics Printer e IBM 4201 Proprinter e IBM Personal Computer Printer Cable IBM 5153 PC Color Display IBM 4863 PCjr Color Display e IBM Communications Adapter Cable Diagnostic Tip Error Code 5103 When running diagnostics on the 5140 PC and it responds with a 5103 error make sure that there is paper in the printer the ribbon is installed correctly and the ribbon cassette is not out of ribbon Any of these conditions can cause a 5103 error Chapter 4 5150 PC Diskette Drive Electrical Nominal 120V AC Minimum 104V AC Maximum 127V AC kva 0 22 max Figure 4 2 Part 2 of 2 5150 PC1 Specifications System Board Keyboarts Keyooarg Cassette Math System Expansion Slots bS Coprocessor System LEX40671 Board Power Connections Figure 4 1 5150 PC Color Trimmer The 5150 PC uses a 16 bit 8088 Processor 16Kb to ed Capacitor 640Kb of RAM It uses 0 1 or 2 diskette drives with a CPU et storage range of 160Kb to 320Kb The 5150 has five Su I O slots and a 4 channel direct memory access DMA Yi Block 2 40Kb ROM Ue Ll Switch Bank
111. ics have finished testing the adapter they will direct the IBM customer engineer to the DunsPlus Installa tion and Service manual to complete the communi cation link test The part number for the Internal Modem Adapter will be included in the DunsPlus 6 16 Installation and Service manual The adapter is easily identified by the two modular telephone jacks on the rear of the adapter The telephone plugs into the bottom receptacle and the wall connector plugs into the top receptacle Printer Register Adapter LEX40110 Figure 6 11 Printer Register Adapter The Printer Register Adapter is included in the DunsPlus system It contains the normal Parallel Printer Adapter as well as an 8 bit register used by the DunsPlus system for security This 8 bit register stores the users identification which allows them access to the DunsPlus network The part number for the Printer Register Adapter is included in the DunsPlus Installation and Service manual Printers Two printers are available for the DunsPlus system e The standard IBM 80 CPS Graphics Printer 5152 e The NEC Model 3550 Letter Quality Printer which is a FRU Both printers are serviced on an exchange basis through IBM Service LEX40111 Figure 6 12 IBM 5152 Printer Sey LEX40112 Figure 6 13 NEC 3550 Printer FRU Locations The FRU locations on the PC XT board are fixed They are shown in Figure 6 14 and are as follows Position 1 Color G
112. ions including a power on self test when requested by the system unit This test checks the microprocessor ROM tests memory and checks for stuck keys Additional functions are keyboard scan ning buffering of up to 16 key scan codes maintaining bidirectional serial communications with the system unit and executing the handshake protocol required by each scan code transfer 5150 5160 Based System Diagnostics General Diagnostic Tips Power On Self Test Each time you set the system unit s power switch to on the power on self test POST executes The POST takes 13 to 90 seconds to complete depending on the options installed The POST checks the following System board Memory expansion adapters e Keyboard e Primary display e Diskette drive and adapter e Fixed disk drive and adapter if available To start the POST 1 Turn on all external devices including printer display and plotter 2 Set the power switch on the expansion unit if attached to on 3 Set the system unit power switch to on 4 Turn the brightness and contrast knobs fully clockwise If you have a color monitor ensure that it is set to on 5 Watch and listen for the following responses a A cursor appears on the display in approxi mately 4 seconds b While the memory is being tested the memory size appears in the top left corner of the screen and increases in 64Kb increments until the total system memory is tested This
113. is not applicable to the 5150 PC c One short beep is heard when the POST is suc cessfully completed d The IBM Personal Computer basic screen appears if a diskette or an operating system is not automatically loaded from a fixed disk drive Vertical Mounting Not Supported IBM does not support operating the 5160 in a vertical position Loss of customer data could occur if the system is operated in this manner Power Diagnostic Tips Dead Machine Tips Verify that the outlet has good power and that power cord is good e Disconnect all external I O cables from PC external I O may cause power problems e If installed remove the math coprocessor e Remove disk drive power connectors one at a time from the disk drive logic board a failing logic board may cause power problems e Check voltages exiting power supply to system board Check system board ohm resistance System Board Power 1 Set the power switch on the system unit to off 2 Set your meter to the 12V DC scale 3 Refer to Figure 4 6 on page 4 4 and connect the common lead to pin 5 and the voltage lead to pin 1 of the system board power connector 4 Set the power switch on the system unit to on 5 Check for a voltage reading of 2 4V DC to 5 2V DC Leave your meter set on the 12V DC scale and check the rest of the power supply voltages to the system board see Figure 4 5 Voltage Connectors Min V DC Max V DC Figure 4 5 Power Suppl
114. ks on a soft boot operation Ctrl Alt Del The system might not fail diagnostics with the standard configura tion There might be adapters other than the EGA that will produce this failure mm oa a ww System Clock N_ _ If the 5170 is operating under DOS and the time and date are changed the system clock is not updated You must go to the time and date function to update the system clock If the system clock is not operating correctly the system board must be changed Keylock Switch Continuity To check keylock switch continuity 1 Set the system unit s power switch to off 2 Remove the system unit s cover 3 Disconnect the control panel cable from the system board 4 Set your meter to the ohms x 1 scale 5 Check the control panel s switch as shown in Figure 9 27 e Keylock locked continuity 0 ohms e Keylock unlocked no continuity infinity wv Unlocked X a ee Locating Pin LEX40183 Figure 9 27 Keylock Switch Continuity Check Speaker Continuity To check speaker continuity 1 Set the system unit s power switch to off 2 Set your meter to the ohms x 1 scale 3 Disconnect the speaker cable from the system board 4 Refer to Figure 9 28 and check the continuity of the speaker au LEX40184 Figure 9 28 Speaker Continuity Check Keyboard Failures If a keyboard failure occurs at setup time remove the keyboard covers and check to see whether the cable i
115. l Computer AT A store controller can support up to two loop adapters If your controller has two adapters installed one must be jumpered to serve loop 1 and the second adapter must be jumpered as loop 2 A marked decal is on the end of the adapter to which the loop cable connects Multiprotocol Communications Adapter P N62361 78 This adapter a new feature available for all 5170 models provides the capability to select under program control the desired communication protocol to be used Supported protocols are asynchronous binary synchro nous or SDLC The interface is an EIA RS232C In asynchronous mode a programmable baud generator allows operation from 50 to 9600 baud The user can select 5 6 7 or 8 bit characters with 1 1 5 or 2 stop bits In synchronous mode the adapter operates in half duplex The maximum transmission rate is 9600 bits per second bps as generated by the attached modem or other data communication equipment The interrupt levels are programmable 4683 Model 2 Attachment Adapter Kit FC 8314 This feature code can be installed in a PC 5150 PC 5160 PC 5170 Model 339 and the Personal System 2 Model 8530 It allows direct attachment of one or two 4683 Model 002 Point of Sale Terminals POSTs In this configuration the PC operates as a store controller and the 4683 002 as a POST for the small store environment The small store configuration uses DOS 3 3 or later as an operating system Applic
116. lled The IDs 4 and 5 under the display symbol blink all the time ID 8 blinks when the 64Kb memory and display expansion is present While the advanced test menu is on your screen a memory test is running continuously The number incrementing at the bottom of the screen shows what segment of memory is being tested If a memory failure is detected the number stops incrementing and the next to it is replaced by an error message If this failure occurs make a note of the error message and go to PIC Memory LEX40141 Figure 2 15 Memory Segment Testing You move the cursor to the test s ID by pressing the Ins key When you are ready to start the test press the Enter key and the test begins The test is finished when a message appears under the symbol s ID If appears no failure was detected LEX40142 Figure 2 16 Test Completion If something other than appears a failure was detected If you want to stop a test that is running press the FN key and then press the B key Depending on which test is running you can get one of several responses after pressing FN B The following table lists the responses Test Running Response to Pressing FN B Diskette drive Graphics printer If the system unit beeps press FN B again Test may not stop immediately Message is FFFF Compact printer Internal modem Sound RS232 is FFFF The FN and B keys must be shown on the screen
117. ly 5 25 Inch Diskette Drive Power Connector Fixed Disk Drive Power Connector System Board Power ns Unit Power Connector On Off Power Connector IBM Monochrome Display Power Connector Internally Switched LEX40078 Figure 6 4 5160 Power Supply The system DC power supply is a 130 watt four voltage level switching regulator It is integrated into the system unit and supplies power for the system unit its options and the keyboard The supply provides 15 A of 5V DC 4590 4 2 A of 12V DC 5 300 mA of 5V DC 10 and 250 mA of 12V DC 10 All power levels are regulated with overvoltage and over current protection There are two power supplies 120V AC and 220 240V AC Both are fused If DC overcurrent or overvoltage conditions exist the supply automatically shuts down until the condition is cor rected The supply is designed for continuous opera tion at 130 watts The system board takes approximately 2 to 4 A of 5V DC thus allowing approximately 11 A of 5V DC for the adapters in the system expansion slots The 12V DC power level is designed to power the internal 5 25 inch diskette drive and the 1OMb fixed disk drive The 5V DC level is used for analog circuits in the diskette adapter s phase lock loop The 12V DC and 12V DC are used for powering the Electronic Indus tries Association EIA drivers for the communications adapters All four power levels are bussed across the eight system expansion
118. ly two BIOS modules they will be located in positions U27 and U47 Since swapping BIOS modules between system boards can either downgrade or upgrade a system to a dif ferent model and possibly affect system performance these modules should never be swapped from one system board to another The system board for Models 068 and 099 do not support the use of an IBM 30Mb Fixed Disk Drive However a customer may purchase a 30Mb fixed disk upgrade kit This kit will include a set of BIOS modules that when installed will convert the Model 068 or 099 System Board to a Model 239 System Board 9 22 FRU No Planar Bd Memory Memory Size Module P N8286112 256Kb P N6480170 256Kb 1 10 84 6 10 85 P N6480072 512Kb P N6489922 5l2Kb 6 10 85 11 15 85 Potential Overwriting Problem with Two Diskette Drives A combination of changing diskettes and accessing the drives might cause the diskette drive change latch to be erroneously reset This could happen only if the user e Had diskettes in drives A and B e Performs an operation on the diskette in drive A e Changes diskettes in drive A diskette change latch set e Performs an operation on diskette in drive B accessing drive B which will cause the diskette change latch for drive A to be reset The next operation performed on the diskette presently in drive A could use the file allocation table and direc tory of the diskette that was previously in drive A Thi
119. m is reguired Marketing should be contacted for this patch Remote emulation cannot be run on the 5170 Model 339 because the Enhanced Keyboard is not supported S 370 Channel Emulator Diagnostic Information Additional diagnostics beyond the normal PC AT diag nostics are reguired to service this feature For this reason a separate Problem Determination Diskette and a Hardware Maintenance and Service HMS manual are included with each S 370 Channel Emu lator ship group These diagnostics and the Guide to Operations GTO manual should be kept and made available to you at the installation by the customer The HMS will direct you on how to use the menu driven tests that will isolate failures in this feature to the card or cable and verify proper operation The ship group diagnostics perform extensive checks on the internal operations of the card while connected to devices no disconnection required A channel wrap test also available on the Problem Determination Diskette can be run from the 5170 by following instructions located in the HMS This diagnostic test can be run using 3090 308X or 43XX wrap connectors This choice is provided through a simple menu driven selection When the wrap diagnostic test must be run it is is a IBM customer engineer CE responsiblity to obtain one of the following pairs of wrap connectors e 3090 Wraps P N5479141 and P N5479139 e 308X Wraps P N6028031 and P N6028032 43XX Wraps
120. m unit and expansion unit if attached to off 2 Install the fixed disk drive and connect any data and control connectors that were disconnected during testing 3 Insert your advanced diagnostics diskette in drive A 4 Set the power switch on the expansion unit if attached and system unit to on 5 After the diskette loads press 0 RUN DIAG NOSTIC ROUTINES then Enter 6 Depending on the configuration of your system questions about attached devices might appear on your screen Press Y or N as required then press Enter 7 Press Y or N IS THE LIST CORRECT then Enter If the list is not correct follow the instructions on your screen and correct the list before answering yes If you cannot correct the list you still must answer yes before you can con tinue a When the System Checkout menu appears press 0 RUN TEST ONE TIME then Enter 9 Select 17 FIXED DISK DRIVE S amp ADAPTER then press Enter 10 Press 2 FORMAT FIXED DISK then Enter 11 When ENTER DRIVE ID C D appears press C or D depending on which drive you want to format then press Enter 12 When ARE YOU SURE YOU WANT TO ConTINUE appears press Y then Enter 13 Before turning system over to customer or trans ferring customer data to fixed disk perform the DOS FDISK and then the DOS FORMAT This will further ensure proper operation of the fixed disk See your DOS manual for FDISK and FORMAT procedures Installing Fixed Disk Drive
121. mation 8 7 Chapter 9 5170 Personal Computer AT 9 1 System Differences 9 1 Hardware Considerations 9 3 System Board 9 3 General Information 9 5 General Diagnostic Tips 9 6 Power Diagnostic Tips 9 8 System Memory Diagnostic Tips 9 9 Diskette Drive Fixed Disk Drive Diagnostic Tips 9 14 5170 PC AT Switch Settings 9 23 5170 AT 370 9 26 Personal Computer AT Store Controller 9 28 Chapter 10 3270 PC Products 10 1 System Units 10 1 3270 PC 10 1 3270 Personal Computer AT 10 2 Diagnostic Tips and Information on the 3270 PC and the 3270 PC AT 10 3 3270 PC G 10 4 3270 PC GX 10 6 5279 Color Display and 5278 Display Attachment Unit 10 8 5379 Displays and 5378 Display Attachment Units 10 9 5277 Mouse and 5083 Tablet Model 002 10 10 3270 Unique Error Codes 10 11 Diagnostic Tips and Information on PC G PC GX AT G and AT GX 10 12 Memory Option Switches 10 13 3270 Personal Computer G and GX AT Based Only Extended Memory Adapter 10 14 Chapter 11 Tempest Products 11 l Tempest System PC AT Based 11 8 Debug Guide for 5Mb and 10Mb Removable Hard Files Used with IBM Systems 4455 4456 4459 and 4460 11 12 Chapter 12 Industrial Products 12 1 5531 XTC Industrial Computer 12 1 5532 Color Display 12 3 7531 Industrial Computer 12 3 7532 Industrial Computer 12 3 Options 12 4 7534 Industrial Enhanced Color Display 12 8 7544 Industrial Enhanced Color Display 12 9 7552 Industrial Computer 12 9 7494 Ent
122. mory con tained in the expansion unit The address range for wait state generation is controlled by switch settings on the Extender card The dual in line package DIP switch on the Extender card should be set to indicate the maximum contiguous read write memory in the system unit Receiver Card P N8529251 LEX40084 Figure 7 8 Receiver Card Right View The Receiver card is a four plane card that fits in expansion slot 8 of the expansion unit It redrives the I O channel to provide sufficient power for additional options and to avoid capacitive effects Directional control logic is contained on the Receiver card to resolve contention and direct data flow on the I O channel Steering signals are transmitted back through the expansion unit cable for use on the Extender card Chapter 7 5161 Expansion Unit 7 3 Figure 8 1 5162 PC XT LEX42627 The IBM Personal Computer XT Model 286 is an enhancement of the Personal Computer XT family A standard configuration includes an Intel 80286 6 MHz Microprocessor with zero wait state 640Kb of memory one diskette drive and one fixed disk Extensive special features and software are available which provide compatibility with the rest of the IBM PC family Unit Specifications System Unit Size Height Length Depth Weight Power Cable Length Environment Air Temperature System On System Off Humidity System On System Off Heat Output 142 mm 5 5 in 5
123. must have extender card switches set for 608Kb to 640Kb Figure 6 8 Extender Card Switch Settings 6 14 5160 DunsPlus System DunsPlus Perzonel Computer XF Manufactured hy BM LEX40109 Figure 6 9 5160 DunsPlus System The DunsPlus system consists of a unigue 5160 IBM Personal Computer XT Model 788 IBM 5153 Color Display and an IBM 5152 Graphics Printer or an ec optional NEC letter guality printer and its own unique software It can be used for desktop computing as well as access to data bases on remote computers The IBM customer engineer will install both the hard ware and software for the DunsPlus system The DunsPlus system is a specially designed IBM PC XT built by IBM exclusively for the Dun amp Bradstreet Company Maintenance is accomplished by IBM cus tomer engineers using the DunsPlus Installation and Service manual the PC XT Hardware and Maintenance Service HMS manual and the DunsPlus support center Both installation and service are guided by the DunsPlus Installation and Service manual The DunsPlus support center will screen both installation and service calls The IBM customer engineer will supply DunsPlus with type and serial numbers on installations or element exchange incidents and major code on FRU replacement incidents The feedback to DunsPlus is accomplished via direct entry into the DunsPlus system Communications Link Electronic Call Reporting Procedure guided by the DunsPlus
124. n with 256K installed LEX40206 The switch setting for the 256Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed 4 24 352Kb Total Memory 288Kb 64Kb on System Board ba System Board Switches Switch Block 1 256K Option or 64 256K Option 64K Option 32K Option Card Switches Card Switches Card Switches 1 64 256K option with 192K installed 1 64K option 1 32K option 1 64 256K option with 256K installed 1 32K option LEX40207 The switch setting for the 256Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed Chapter 4 5150 PC 4 25 384Kb Total Memory 320Kb 64Kb on System Board System Board Switches Switch Block 1 256K Option or 64 256K Option Card Switches 1 64 256K option with 192K installed 2 64K options 1 64 256K option with 256K installed 1 64 256K option with 64K instalied 4 64 256K option with 256K installed 1 64K option 1 64 256K option with 256K installed 2 32K options Switch Block 2 64K Option 32K Option Card Switches Card Switches LEX40208 The switch setting for the 256Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed 4 26 I 416Kb Total Memory 352Kb 64Kb on System Board System Board Switches Switch Block 1 256K Option or 64 256K Option Card Switches 1 64 256K option with 256K installed 1 64 256K option with 64K installed 1 32K o
125. nal cable for conti nuity The line numbers at one end of the cable match the line numbers at the other end except for those in Figure 9 31 Diskette Drive A Diskette Drive B Signal Cable Connector Signal Cable Connector Pin Numbering Adapter End Pin Numbering Drive End Drive End Adapter End Figure 9 31 Signal Cable Line Numbers Diskette Dri Diskette Drive B Diskette Drive A 33 DU 34 LEX40181 Figure 9 32 Signal Cable Line Numbers Format D Drive When C Was Specified DOS sometimes formats what a user believed to be the D drive when the C drive was specified This usually happens after one of the fixed disks has been replaced or a diagnostic format has been run on one of the hard files This only occurs on systems with two fixed disk drives When FDISK is not run before Format DOS will not recognize the first drive as C but will think the next drive D is C and format it The safest way to avoid the problem is to always run FDISK before formatting Choose option 4 Display Partition Data and if there is no partition use option 1 Create DOS Partition to create one When DOS boots up it first asks the BIOS how many fixed disks are installed on the machine If any are found DOS will then go out and read the partition table from each drive to see if any space on that disk is assigned to DOS If so it will then assign that drive a drive letter sequentially starting with C if there are two
126. nditions and writes the necessary sector IDs without reading them back for verification The SURFACE ANALYSIS must always be performed after UNCONDITIONAL FORMAT is used to ensure that there are no defective areas left unflagged The purpose of UNCONDITIONAL FORMAT is to remove any erroneous defect flags caused by a faulty Fixed Disk Adapter card or other system malfunction These erroneous defect flags if not removed would make the fixed disk appear to have too many defective areas and cause unnecessary replacement of the fixed disk Failure to Recognize Drive C If you experience this problem you should remove all cards from the system unit except the Disk Diskette Attachment card and the Display Attachment card Retry the load operation both by power on and soft load several times If diagnostics and read verify do not indicate a problem but the problem persists replace the fixed disk drive DOS Loading Problems Cylinders 1 2 3 and 4 must be defect free for DOS 3 0 to operate correctly If any of these tracks are found to be defective the fixed disk should be replaced DOS 3 0 requires that the disk have at least 14 contiguous non defective tracks to load If one of these tracks is defective when you attempt to load DOS you will receive a cylinder zero defective error logical cyl inder zero not physical cylinder zero If a customer does not want the fixed disk replaced for this problem perform FDISK and answer no t
127. nel while you are servicing the machine e Always keep your tool case away from walk areas so that other persons will not trip over it for example put it under a desk or table Do not wear loose clothing that can be trapped in the moving parts of a machine Ensure that your sleeves are fastened or are rolled up above the elbows If your hair is long fasten it Do not wear jewelry chains metal frame eyeglasses or metal fasteners for your clothing Remember A metal object lets more current flow if you touch a live conductor e Insert the ends of your necktie or scarf inside other clothing or fasten the necktie with a clip preferably nonconductive approximately 8 cm 3 in from the ends Wear safety glasses when you are Using a hammer to drive pins or similar parts Drilling with a power hand drill Using spring hooks or attaching springs Soldering parts Cutting wire or removing steel bands Cleaning parts with solvents chemicals or cleaning fluids Working in any other conditions that might be hazardous to your eyes Before you start the machine ensure that other service representatives and the customer s per sonnel are not in a hazardous position After maintenance reinstall all safety devices such as shields guards labels and ground wires Exchange any safety device that is worn or defec tive for a new one Remember Safety devices protect personnel from hazards You
128. o image or image on screen wrong Two beeps No image or image on screen wrong Three beeps No image or image on screen wrong Advanced POST or portion of it goes into loop No beep Memory System Board ERROR OAXX No beep ERROR OBXX No beep ERROR OCXX No beep ERROR 1YXX No beep ERROR 2000 No beep ERROR 21XX No beep ERROR 22XX No beep ERROR 23XX No beep ERROR 24XX No beep ERROR 25XX No beep ERROR 26XX No beep ERROR 27XX No beep ERROR 28XX Any ERROR message not listed in this table Figure Display System Board Cassette or Serial Cartridge Diskette Drive Service Plug General Diagnostic Tips System Board or Power Board Required Items for Diagnostics System Board or 64Kb Memory and Display Expansion In order to perform all of the advanced diagnostics you must have e A system unit A known good display television receiver e A service plug P N6447196 e A POST loop plug P N6447197 A parallel printer attachment wrap plug P N8529228 e A serial wrap plug P N6447198 o A Triplet Model 310 Multimeter or equivalent How to Perform Advanced POST System Board or Power Board 64Kb Memory and Display Expansion Display Expansion Before you perform advanced POST do the following 1 Set the system unit s power switch to off Display Expansion 2 Set the display s power switch to off 3 Connect the power trans
129. o the question Do 9 20 you wish to use the entire fixed disk for DOS and try loading DOS starting at cylinder 004 or higher If this does not resolve the problem the fixed disk must be replaced Software Loading Problems A limited number of Personal Computer software appli cations might fail to load or cause the system to hang up However these software applications might not fail on all systems For instance the same application might run on one 5170 and fail on another Software applications that use and or check for the presence of a math coprocessor must be installed using the information in the technical reference manuals This information can be found in the BIOS listing under the interrupt 11 preamble The technical refer ence manuals for some systems indicate that Bit l of the AX register is not used However it is used to detect the presence of a math coprocessor Other technigues used can yield unreliable results and are not supported by IBM Users guestions should be referred to their software vendor or point of sale Backup Restore Problems A DOS 3 0 backup command error might manifest itself in different ways as a file sharing error or an out of seguence error during a restore operation If errors of these types are experienced or suspected a patch diskette is available upon reguest through the point of sale Fixed Disk Diskette Drive Voltage To check the voltage of a fixed disk diskette
130. on with Parity DIP Checking Switches Pin 1 Speaker Output LEX40077 Figure 6 3 5160 System Board Component Diagram The system board fits horizontally in the base of the system unit of the Personal Computer XT and Portable Personal Computer It is a multilayer single land per channel design with ground and internal planes pro vided DC power and a signal from the power supply enter the board through two 6 pin connectors Other connectors on the board are for attaching the keyboard and speaker Eight 62 pin card edge sockets are also mounted on the board The I O channel is bussed across these eight I O slots Slot J8 is slightly dif ferent from the others in that any card placed in it is expected to respond with a card selected signal when ever the card is selected A dual in line package DIP switch one 8 switch pack is mounted on the board and can be read under program control The DIP switch provides the system Chapter 6 5160 PC XT 6 1 programs with information about the installed options how much storage the system board has what type of display adapter is installed what operation modes are desired when power is switched on color or black and white 80 or 40 character lines and the number of diskette drives attached The system board contains the adapter circuits for attaching the serial interface from the keyboard These circuits generate an interrupt to the micro processor when a complete scan code
131. onitor you are using 7 8 Number of 5 25 inch diskette drives attached Math Coprocessor Switch Settings Figure 6 6 shows the settings for position 2 Math Coprocessor Installed Math Coprocessor Not Installed i iI l LEX40234 Figure 6 6 Math Coprocessor Switch Settings System Board Memory Switch Settings The following figures show the settings for positions 3 and 4 for the amount of memory on the system board om GRAIG om NN IDDI iii LEX40235 Chapter 6 5160 PC XT 6 3 Display Adapter Switch Settings The following figures show the settings for positions 5 and 6 No Display or IBM EGA either by itself or in combination with another Display Adapter IBM Monochrome Display and Printer Adapter alone or in combination with an IBM Color Graphics Monitor Adapter 40x25 Color 80x25 Color Switch Block 1 2345678 E a CEE C CI Eu gt zo gt ZO E rg CJN Ea C Ee Ee CN Cin ZO SS CJN Dau amie U No CI C 2G EEA C Lla Es EN majo LEX43131 Figure 6 7 Monitor Type Switch Settings Note See Chapter 10 3270 PC Products for 3270 unique switch settings 10 20Mb Fixed Disk Drive Adapter Card Switch Settings we FAT woe BALL we Ha ew FL Drive C Note os joo jee CoN foo oor C ce eo m_ i gt e L EN LE lE CS Drive D LEX41701 Type 1 is an IBM 10Mb Fixed Disk Drive
132. oper operation of the power supply When the supply is switched off for a minimum of 1 second and then switched on the power good signal is generated assuming there are no problems This signal is a logical AND of the DC output voltage sense signal and the AC input voltage sense signal The power good signal is also a TTL compatible high level for normal operation or a low level for fault condi tions The AC fail signal causes power good to go to a low level at least 1 millisecond before any output voltage falls below the regulation limits The oper ating point used as a reference for measuring the 1 millisecond is normal operation at minimum line voltage and maximum load The DC output voltage sense signal holds the power good signal at a low level when power is switched on until all output voltages have reached their minimum sense levels The power good signal has a turn on delay of at least 100 milliseconds but not longer than 500 milliseconds The following figure shows the minimum sense levels for the output voltages Level V DC Minimum V DC 5 5 12 12 Figure 9 9 5170 Sense Levels Fan Out Fan out is the number of inputs that one output can drive The power good signal can drive six standard TTL loads General Information Speaker The system unit has a 2 25 inch permanent magnet speaker which can be driven from e The I O port output bit e The timer counter s clock out e Both Jumper The
133. oritize oper ations Diagnostics will not necessarily fail on a PC with interrupt conflicts yet the operator will keep getting errors Although the customer is responsible for solving interrupt conflicts an IBM service repre sentative can use this information to reduce diagnostic time NTFs unnecessary parts replacements and callbacks To determine whether an unusual PC problem is caused by conflicting interrupt levels follow these steps A Load the advanced diagnostics diskette go to the list of installed devices and copy that list B Examine the adapter cards installed in the system unit and expansion unit If any cards are located that are not on the list from Step 1 add them to the list C Sort the list into the following interrupt levels 1 Kevboard 2 Enhanced Graphics Adapter 3278 79 Emulation Adapter Primary PC Network Adapter 3 ALT ASYNC Communications Adapter COM2 ALT BISYNC Communications Adapter COM2 ALT Serial Parallel Adapter Serial Port ALT PC Network Adapter SDLC Communications Adapter PC Cluster Adapter selected by a jumper Display Station Emulation Adapter selected by a jumper 4 ASYNC Communications Adapter COMI BISYNC Communications Adapter COM1 Serial Parallel Adapter Serial Port SDLC Communications Adapter 9 Fixed Disk Adapter except in Personal Com puter AT ALT Serial Parallel Adapter Parallel Port Display Station Emulation Adapter selected by a jumper 6 Diskett
134. ortable hand held device An optional cord connection to the system unit is available Power is sent to the keyboard and serially encoded data is received by the system unit through the optional cord When connected the cord s keyboard connector removes the battery power and the CABLE CONNECT signal disables the infrared receiver circuit The disabling of the circuit also allows other infrared devices to be used without inter fering with the system The data which is received through the IR link or by the cord have the same format The keyboard electronics are designed with low power complementary metal oxide semiconductor CMOS integrated circuitry for battery power operations Four AA size batteries are required Because the key board is normally in the standby power down mode which uses very little power no on off switch is needed The 4860 Keyboard was manufactured in two versions The old Chicklet version was replaced with the version that is currently in use The new keyboard is electron ically identical to the older version but is improved mechanically for easier use It has bigger keys that are easier to press and the key designations are on the key tops rather than printed on the keyboard itself The 4860 Keyboard is a field replaceable unit FRU nothing on it can be repaired Batteries in the key board are the customer s responsibility A failing key board should be replaced General Information Connector
135. otective jacket The protected disk free to rotate within the jacket is continuously cleaned by the soft fabric lining of the jacket during normal operation Read write erase head access is made through an opening in the jacket Openings for the drive hub and diskette index hole are also pro vided The following figure is a drawing of the diskette used with the IBM 5 25Inch Diskette Drive Oxide Coated Mylar Disk Write Protect 3 56 mm 6 30 0 25 mm 0 140 in 7 0 25 0 01 in Sealed Protective Jacket 133 4 mm 5 25 in 96 5 0 25 mm 3 80 0 01 In Spindle Access Aperture Recording Medium LEX41771 Figure l l 5 25 Inch Diskette Simplified 1Trademark of E I du Pont de Nemours and Co Inc Types of 5 25 Inch Diskettes You can use the following types of diskettes to read and write information e Single sided 160Kb 180Kb e Double sided 820Kb 360Kb e High capacity 1 2Mb It is important to remember that if you write on a single sided or double sided diskette using a high capacity diskette drive you might not be able to read the diskettes in a single or double sided diskette drive Types of 3 5 Inch Diskettes Distinguishing features 720Kb diskette 1 44Mb diskette Locking tab In closed position allows writing on diskette Locking tab In closed position allows writing on diskette Note Format 1 OMb media to 720Kb Format 2 OMb media to 1 44Mb
136. oving use the following procedure Load the diagnostic routines and select Option 3 Prepare Fixed Disk for Relocation This moves the disk head over the highest available cylinder beyond the data area This is the designated position when moving the system or expansion unit Fixed Disks Ready for Shipping appears on the monitor when the relocation routine completes successfully The system or expansion unit is now ready to be pre pared for shipment Chapter 4 5150 PC 4 11 Determining Available Space on Fixed Disk DOS CHKDSK checks for the amount of usable space on the disk surface Do not replace the fixed disk if the usable area exceeds the specified disk capacity that is 10 or 20 megabytes The following process may be used to determine the number of bytes required for different capacity drives Note 1 byte 1 024 1 024 x Disk Capacity Total Number of Bytes Required Examples follow 1 024 x 10 000 000 10 240 000 bytes 10Mb 1 024 x 20 000 000 20 480 000 bytes 20Mb 1 024 x 30 000 000 30 720 000 bytes 30Mb After determining the number of bytes reguired refer the customer to the DOS manual to run the CHKDSK procedure To calculate the number of good bytes on the disk do the following Subtract Bytes in Bad Sectors From Bytes Total Disk Space If the resulting number is greater than the calculated total number of bytes reguired above the drive is good This tip also applies to the
137. pansion Adapters is Switches 1 5 Starting address in the expan sion memory area Special assignments for each type of memory option Switches 6 8 Switches 1 5 The first Memory Expansion card will always have a starting address of 1Mb Other Memory Expansion Adapters starting addresses are dependent upon the amount of memory previously installed in the system Switch The off position Settings will enable 1 8Mb 2 4Mb 2Mb 1Mb 0 5Mb Example Assume you have 3 5Mb of expansion memory installed in your system and you are installing another memory option 1 0Mb Starting address for expansion memory 3 5Mb Amount of expansion memory installed 4 5Mb Starting address of new memory option to be installed New memory option should have switches 2 and 5 off and 1 3 and 4 on The 512Kb Memory Expansion Card has two banks of eight switches each Switches 1 5 on both banks are set the same Switches 6 7 and 8 Switches 6 7 and 8 are dependent on the type of memory option 128Kb Memory Expansion Adapter e No switches e Adds 128Kb to base memory 128Kb 640Kb Memory Expansion Adapter This card fully populated will provide 128Kb to the base memory and 512Kb to expansion memory 128Kb 640Kb with only 128Kb installed Switches 6 7 8 Off On Off Adds 128Kb to base memory 128Kb 640Kb fully populated or with only 512Kb of system expansion memory installed Switches 6 T 8 On On Off Adds 512
138. ption 1 64 256K option with 256K installed 1 64K option 1 32K option LEX40209 The switch setting for the 256Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed Chapter 4 5150 PC 4 27 448Kb Total Memory 384Kb 64Kb on System Board System Board Switches 4 64 256K option with 256K installed 1 64 256K option with 64K installed 1 64K option 1 64 256K option with 256K installed 2 64K options 1 64 256K option with 256K installed 1 64 256K option with 128K installed 256K Option or 64 256K Option Card Switches Switch Block 2 64K Option 32K Option Card Switches Card Switches LEX40210 The switch setting for the 256Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed 4 28 480Kb Total Memory 416Kb 64Kb on System Board 256K Option or 64K Opti i l ption 32K Option 64 256K Option Card Switches Card Switches Card Switches 1 64 256K option with 256K installed 1 64 256K option with 128K installed 1 32K option LEX40211 The switch setting for the 256Kb option is the same as that for the 64Kb 256Kb option with 256Kb installed 512Kb Total Memory 448Kb 64Kb on System Board System Board Switches 256K Option or 64K Opti i ption 32K Option 64 256K Option Card Switches Card Switches Card Switches 2ed y 5678 ma TT h 42345678 N i WT 1 7 8 TW 1 64 256K option with 256K install
139. raphics Monitor Adapter Position 2 Open Position 3 Open Position 4 Internal Modem Adapter Position 5 Fixed Disk Adapter Position 6 Diskette Drive Adapter Position 7 Printer Register Adapter Position 8 Asynchronous Communications Adapter LEX40113 Figure 6 14 PC XT Board FRU Locations 9160 XT 370 Diskette Drive System Unit Keyboard LEX40128 Figure 6 15 5160 XT 370 The XT 370 is an extended version of the 5160 XT with 256Kb of memory on the system board The system unit has two XT 370 Adapter cards plugged into the system board e The Processor card PC 370 P in expansion slot 4 e The 512Kb Memory card PC 370 M in expansion slot 3 Options available include A Remote Display Terminal Device Emulation Adapter card e IBM 3278 79 Emulation Adapter Note A Remote Display Terminal Device Emulation Adapter card can be in expansion slot 2 The XT 370 can be used as a 10Mb system one fixed disk drive in the system unit or a 20Mb system two fixed disk drives in an expansion unit Note Older models of the PC XT 370 might contain a PC 3277EM card This option provides 3277 2 emu lation when the PC XT 370 is attached to a host system Chapter 6 5160 PC XT 6 17 Unit Specifications System Unit Size Height Length Depth Weight Power Cable Length Size Environment Air Temperature System On System Off Humidity System On System Off Heat Output Noise Level Ele
140. rent Amps Minimum 90 115V AC Maximum 4 6 Maximum 137 Minimum 180 Maximum 2 3 230V AC Maximum 265 Figure 8 7 5170 Input Requirements outputs The power supply provides 5 5 12 and 12V DC The following figure shows the load current and regu lation tolerance for these voltages The power to the IBM Monochrome Display is controlled by the power N supply pee Warning The voltage provided to the monochrome display from the power supply is the same as the input line voltage to the power supply Ensure that the monochrome display is the correct model for the input line voltage Nominal Load Current A Regulation Output Minimum Maximum Tolerance 5 to 4 10 to 8 5 to 4 10 to Figure 8 8 5162 DC Load Requirements DC Output Protection An overcurrent condition will not damage the power supply Output Voltage Sequencing Under normal conditions the output voltage levels track within 50 milliseconds of each other when power is applied to or removed from the power supply pro vided at least minimum loading is present No Load Operation No damage or hazardous conditions occur when primary power is applied with no load on any output level In such cases the power supply may switch off and a power on reset will be required The power supply requires a minimum load for proper operation Power Good Signal The power supply provides a power good signal to indi cate
141. rive Power a Diskette Drive Cable Check the diskette drive power connector for the volt Check the diskette drive signal cable for shorts as follows 1 Set the power switch on the system unit and expansion unit if attached to off 2 Disconnect the diskette drive signal cable from the Diskette Drive Adapter and the diskette drive 3 Carefully inspect the cable connectors for bent or broken contacts Inspect the connectors on the adapter and on the diskette drive logic board for cracks or corrosion Set the meter on the ohms x 1K scale 5 Using the adapter end of the cable check for shorts by touching the other meter probe to pin 2 The meter should indicate infinity Check pin 2 to pin 3 pin 3 to pin 4 and so on until all pins have been checked aN Adapter End Drive A Connector 34 yN gt 2 33 1 Cable Twisted Drive B All Three Connectors Connector Are Numbered The Same LEX40158 Figure 4 20 Diskette Drive Cable Connectors ages shown in the table below Diskette Drive Power Connector Figure 4 21 Diskette Drive Power Connector Volt ages LEX40159 Figure 4 22 Connector Pins Moving System with Fixed Disk Warning Normal shipping and handling can result in permanent loss of all data on the fixed disk drives and increase the possibility of shipping damage for a 5160 or a 5161 To prepare the system unit and expansion unit fixed disk for m
142. roximately 50 pounds Chapter 9 5170 Personal Computer AT 9 17 LEX40173 Figure 9 35 Vertical Operation c Power on the system unit and load the advanced diagnostics diskette and select the FIXED DISK DRIVE S AND ADAPTER test Select option 5 RUN ALL TESTS Select option 6 READ VERIFY f If no error occurs return to the Symptom Action Table g If an error occurs run PREPARE SYSTEM FOR MOVING and shut off power Restore the system to the horizontal position and go to 6 4 Fixed Disk Diskette Drive Adapter Visual Checks a Visually inspect resistor pack Z2 for cracks or damage see Figure 9 36 o a Data Cable Connector LEX40174 Figure 9 36 Fixed Disk Diskette Adapter Visual Checks b Inspect data cable connections for proper seating see Figure 9 37 Resistor pack 24 might be interfering with the connector Locating Key Data Cable Connector Data Cable Connector LEX40175 Figure 9 37 Data Cable Connection c If either visual defect is found go to Step 5 of this section Otherwise return to the Symptom Action Table 5 Replace Fixed Disk Diskette Drive Adapter a Remove the Fixed Disk Diskette Drive Adapter b Carefully install the replacement adapter to avoid damage to resistor pack Z2 and ensure proper connector seating c If the replacement card fails reseat the card all cables and retest the adapter prior to replacing it Note Damaged or defective adapters mig
143. ry Level Facility ELF Data Collection Terminal 12 11 Chapter 13 5126 Technician Terminal 13 1 5126 System 13 1 Chapter 14 Personal Computer Series 1 14 1 4950 System 14 1 Series l to Personal Computer Channel Attachment 14 4 5170 495 System 14 6 Chapter 15 Display Units 15 1 Contents vii 4863 PCjr Color Display 15 1 5151 Monochrome Display 15 1 5153 Color Display 15 2 5154 Enhanced Color Display 15 2 5175 Professional Graphics Display 15 3 5272 Color Display 15 4 4055 InfoWindow Display 15 4 IBM PC Cards and IBM PC to IBM 4055 InfoWindow Interface Cables 15 8 Displays Diagnostic Tips 15 9 Chapter 16 Additional I O 16 1 3363 Optical Disk Drive 16 1 5173 IBM PC Network Baseband Extender 16 2 5178 Translator Unit 16 4 IBM 5841 1200 bps Modem 16 5 6157 Streaming Tape Drive 16 6 6180 Color Plotter 16 7 7371 Color Plotter 16 7 7372 Color Plotter 16 8 8228 Multistation Access Unit for IBM Token Ring Network 16 9 Chapter 17 PC Family Options and Adapters 17 1 System to Adapter Compatibility 17 1 Options Parameters 5150 5160 5161 17 4 Option to Adapter Compatibility 17 5 4860 PCjr Options 17 6 PC Family Options 17 11 Chapter 18 Personal Computer Parts Catalog 18 1 Chapter 19 Engineering Change Announcements ECAs 19 1 Chapter 20 Advanced Diagnostic Diskettes 20 1 Making a Backup Copy 20 1 Chapter 21 Service Summary Cards _ 21 I Part Number Index X l Index x 3 Chapter
144. s plugged into the connector The apparent cause for the cable coming loose is that the black insulation extends too far inside the keyboard To relieve the pressure on the connection you can trim the insu lation to within 0 5 inch of the opening where it comes through the keyboard or split the insulation the same distance This problem will be fixed on future key boards Keyboard Cable Continuity To check keyboard cable continuity 1 Set the system unit s power switch to off 2 Disconnect the keyboard cable from the keyboard 3 Refer to Figure 9 29 on page 9 14 and check the keyboard cable for continuity Note Check the continuity of wires 1 2 4 and 5 wire 3 is not used Chapter 9 5170 Personal Computer AT 9 13 Keyboard Cable LEX40185 Figure 9 29 Keyboard Cable Continuity Check Diskette Drive Fixed Disk Drive Diagnostic lips Diskette Drive Motor Speed Adjustment To adjust the diskette drive motor speed 1 Insert the advanced diagnostics diskette into drive A 2 Set the system unit s power switch to on 3 Advance to Diagnostic Menu 9 4 In Menu 9 select option 4 Speed Test for the diskette drive you are testing The drive motor speed and the adjustment specification appear on the screen 5 The indicated speed should be 1640 to 1695 If it is not continue to Step 6 6 The adjustment for the drive motor speed is a vari able resistor on the diskette drive circuit board on t
145. s could result in the file allocation table directory or data being overwritten If the above symptoms occur inspect the manufacturer s label on the rear of the drive If the first 3 digits of the g digit number below the bar code are 345 or 346 and there is no label next to the manufacturer s label with P N59X7184 replace the 1 2Mb diskette drive s The 360Kb drive is software controlled and is not affected Refer to ECA016 Problem with Format A 4 DOS 3 2 and 5170 Model 339 DOS Release 3 2 command Format A 4 used to format 360Kb diskettes on the 1 2Mb diskette drive does not function properly on a 5170 Model 339 The format command displays large amounts of bad diskette space To circumvent the problem enter the command DIR with the diskette mounted before issuing a format command 5250 Remote Emulation Problem with SDLC Card The remote 5250 Emulator either will not come up or else it drops the line after a short period when using SDLC in a 5170 There is a critical timing link between the CPU the SDLC card and the emulator program Because of the timing incompatability a data overrun condition is created by software and the terminal drops The same card will work perfectly in a 5150 or a 5160 and with 3270 emulation on any PC A patch is needed for the 5250 Emulation Program This patch is on the HONE Equal System as item number 434CH DOS Debug should be used and prior knowledge of this progra
146. s non IBM alterations Use good judgment as to the safety of any non IBM alterations 6 Check inside the unit for any obvious unsafe con ditions such as metal filings contamination water or other liquids or signs of fire or smoke damage 7 Check for worn frayed or pinched cables 8 Ensure that the voltage specified on the voltage tag back panel of the machine matches the voltage of the power receptacle If in doubt the voltage should be verified 9 Examine the power supply and verify the fol lowing a Ensure that the non removable fasteners in the power supply cover have not been removed or tampered with b Ensure that the grommet is installed where the internal power cables come through the frame of the power supply 10 Check for the following labels a Caution Hazardous Area Do not remove this cover Trained service people only No serv iceable components inside Chapter 1 General Information 1 IBM Personal Computer AT 5170 Based Systems To inspect the IBM Personal Computer AT l 10 11 12 lb Set the power switch to off and disconnect the power cord Check exterior covers for damage loose broken or sharp edges Check the power cord for the following a A third wire ground connector in good condi tion Use a meter to measure third wire ground continuity for 0 1 ohms or less between the external ground pin and the frame ground as specified in the Hardware Maintenance
147. sembly Chapter 9 5170 Personal Computer AT 9 29
148. shown as UNABLE TO READ refer to Step 4 on page 9 16 and Step 5 on page 9 16 of General Tips If more than 20 tracks are shown as UNABLE TO READ go to Step 6 on page 9 18 of General Tips Return to the Symptom Action Table 2 Power Supply Connector Check a b Power off the system unit and remove the system unit cover Power on the system unit load the advanced diagnostics diskette and select the FIXED DISK DRIVE s and ADAPTER test Select Option 5 RUN ALL TESTS Lightly tap the power supply connector at the fixed disk drive with an insulated tool or a pencil see Figure 9 34 Fixed Disk Drive C Power A Connector Fixed Disk Drive D LEX40172 Figure 9 34 Power Connector e If no error occurs return to the Symptom Action Table f If an error occurs the power connector might be loose To correct this problem gently squeeze the female power connector contacts together to create a tighter connection g Repeat Step 2 if no error occurs go to Step 8 h If errors continue return to the Symptom Action Table 3 Fixed Disk Drive Vertical Operation a Run PREPARE SYSTEM FOR MOVING to move the read write heads off the data area then power down the system b Carefully stand the system unit on end power on off switch pointing up Ensure that the power supply end is up see Figure 9 35 on page 9 18 CAUTION You might need two people to move the system unit It weighs app
149. system board has a 3 pin Berg strip connector The placement of a jumper across the pins of the con nector determines whether the system board s second 256Kb of RAM is enabled or disabled The following shows how the jumper affects RAM Jumper Function Positions 1and 2 Enable second 256Kb of system board RAM Disable secomd 256Kb of system board RAM 2and 3 Figure 9 10 5170 RAM Jumper Chapter 9 5170 Personal Computer AT 9 5 Note See Figure 9 14 on page 9 7 The normal mode is the enable mode The disable mode permits the second 256Kb of RAM to reside on adapters plugged into the I O bus System Unit Keylock Locked Position Uniocked Position Power On Keylock Indicator Light LEX40091 Figure 9 11 5170 System Unit Keylock The keylock deactivates the keyboard and locks the cover on for security You can lock the system whether the power is on or off Turn the key clock wise to lock the system or counterclockwise to unlock it The key may be removed in either position When the system unit s power is on the green power on indicator light is on Duplicate keys for system unit keylock devices are the responsibility of the customer Key reorder informa tion is located in the 5170 Guide to Operations manual Customers can obtain information for ordering IBM Personal Computer AT replacement keys and their cost by writing to the address listed below The lock man
150. t or removing replacing a fixed disk drive This will move the read write heads off the data area of the disk to prevent damage to the media 2 When formatting the fixed disk drive with the advanced diagnostics use CONDITIONAL FORMAT If CONDITIONAL FORMAT will not run perform an UNCONDITIONAL FORMAT fol lowed by a SURFACE ANALYSIS If an UNCON DITIONAL FORMAT is performed the defective cylinder head information found on the front label of the fixed disk must be entered at the start of the routine 3 Any new cylinder head locations flagged as defec tive during CONDITIONAL FORMAT or SURFACE ANALYSIS should be noted on the label at the front of the fixed disk 4 It is recommended that DOS FDISK and DOS FORMAT be performed by the customer or a cus tomer engineer on a replaced fixed disk prior to returning the system to the customer or prior to leaving the customer location This will further ensure proper functioning of the replaced drive 5 To enable booting from the fixed disk DOS FORMAT loads the three system files at the begin ning of the fixed disk DOS partition This reguires five contiguous error free cylinders at the begin ning of the partition If cylinders O 1 2 3 or 4 have any defective tracks flagged the DOS 3 0 format routine will fail with a track 0 error or a Disk Unsuitable For System Disk error To resolve this situation the customer can move the beginning of the DOS partition beyond the defec tive
151. talled Select a number and type 20Mb or 30Mb of fixed disk installed Select the amount of base and expansion memory installed Set the primary display if two display adapters are installed Fixed Disk Drives Memory Amount Display Note If Menu 2 Select an Option appears after the POST select option 4 SETUP and verify that the options are correctly set J umper The system board has a 3 pin Berg strip connector The placement of a jumper across the pins of the con nector determines whether the system board s second 256Kb of RAM is enabled or disabled Jumper Positions Function Enable second 256Kb of system board RAM Disable second 256Kb of system board RAM Figure 9 13 5170 Jumper Positions for Full Size System Board Only The RAM jumper in the disable position 256Kb RAM allows the user to utilize additional RAM provided on option cards without fully populating the system board Note All 20Mb drives manufactured by IBM or for IBM are Type 2 and 30Mb drives are Type 20 Also to enter the correct type 20 for a 30Mb drive requires diagnostics at Level 2 0 or higher and the correct level of BIOS Battery Connector Keyboard Connector Adapter Slots Math Coprocessor Connector Power Supply Connector Display Switch Variable Capacitor ee i sma joe El TNO snt E ETODIDON L Unwn Memory Modules nn RAM Jumper Speaker Connector LEX40164 Fi
152. te drive that information can only be read by a high capacity diskette drive Note Diskettes designed for use in this drive cannot be used in either a 160Kb 180Kb or a 320Kb 360Kb diskette drive in the 1 2Mb mode Hardware Considerations The following are hardware features of the IBM Per sonal Computer AT that are not supported by the rest of the IBM Personal Computer Family Adapters The IBM Personal Computer AT 128Kb Memory Expansion Option the IBM Personal Computer AT 512Kb Memory Expansion Option the IBM Personal Computer AT Prototype Adapter and the IBM Per sonal Computer AT Fixed Disk and Diskette Drive Adapter use the additional 36 pin system board expan sion slot and are not compatible with the rest of the IBM Personal Computer Family The IBM Personal Computer AT does not support e Expansion unit e IBM Asynchronous Communications Adapter oe IBM 64Kb 256Kb Memory Expansion Adapter e IBM Printer Adapter e Other keyboards Incompatible Adapters Certain option adapters conflict with each other when used in the same system The following adapters should not be installed together in your system unit e Synchronous Data Link Control SDLC e Alternate Binary Synchronous Communications Alt BSC System Board Keyboard Connector Math Coprocessor Connector Power Supply Connector Battery Connector Adapter Slots Display Switch Variable Capacitor dynnu qoute EEE iota il annn att
153. ter cards containing potentially defective soldered memory modules and pluggable memory modules on the Enhanced Graphics Adapter EGA Expansion card when diagnostics indicate an adapter or memory module failure Machines and Devices Affected Hardware Maintenance and Service HMS manual maintenance analysis procedures MAPs for bank and module locations e EGA Memory Expansion card P N6323468 has pluggable memory modules P N8854219 located in bank 01 02 and 03 The following adapters have soldered modules Modules Positions EGA Card P N8654215 APA Card P N8654390 PS XT Card P N8654381 XGA AT Card P N2683118 U1 2 10 11 40 41 50 and 51 U65 78 91 and 103 U10 23 36 49 62 and 75 U11 12 24 25 38 Type Device Description 4450 EGA Expansion Card 4455 EGA Card 5150 PS AT Card 5160 PS XT Card 5161 Extended Graphics Adapter XGA Card 5170 All Points Addressable APA Card 5271 5273 5373 5531 75381 7532 Replace memory modules numbered 8535 through 8544 that are labeled plant code G when diagnostics indi cate a memory module or adapter failure When the memory modules are soldered refer only to the number code 8635 through 8544 on the top of the memory module and replace the adapter card if applicable When the memory modules are pluggable refer to both top and bottom view and replace all of the affected modules during a repair action The affected modules do not affect dat
154. the diskette that will be accessed by the read write heads of the diskette drive DOS Version 3 2 is required to use a 3 5 inch diskette drive 8 4 Fixed Disk and Diskette Drive Adapter N One Fixed Disk and Diskette Drive Adapter is present in slot 6 and is the only Fixed Disk and Diskette Drive Adapter that can be installed in a 5162 configuration Up to three drives two diskette drives and one fixed disk drive can be attached to this adapter The two attached diskette drives can be e Two 5 25 inch high capacity diskette drives e One high capacity diskette drive and one 5 25 inch 360Kb diskette drive e One high capacity diskette drive and one 3 5 inch diskette drive 3 5 inch internal diskette drive or 4865 Personal Computer 3 5 Inch External Diskette Drive Model 002 The External Diskette Drive Adapter provided with the 4865 Model 002 External 3 5 Inch Diskette Drive also attaches to the Fixed Disk and Diskette Drive Adapter Power Supply The system power supply located inside the system unit provides power for the system board the adapters the diskettes drives the fixed disk drive the keyboard and the IBM Monochrome Display Duoz Inputs The power supply can operate at 110V AC 4 6A or 220 240 V AC 2 3A at frequencies of either 60 3 Hz or 50 3 Hz The power supply automatically adjusts to input voltages of 110V AC or 220V AC The following figure shows the input requirements Voltage V AC Cur
155. tion 1 64K option 1 32K option 3 32K options LEX40243 Chapter 6 5160 PC XT 6 384Kb Total Memory 128Kb 256Kb on System Board 64 256K Option 64K Option 32K Option Na UA Card Switches Card Switches Card Switches mb 64 256K option with 64K installed a id blond Tf mb N 64K options 64 256K option with 64K installed 32K options oh 64K option 32K options N ok 5d 23445 678 64 256K option with 128K installed A I I A uf We LEX40244 6 8 416Kb Total Memory 160Kb 256Kb on System Board 64 256K Option 64K Option 32K Option Card Switches Card Switches Card Switches 1 64 256K option with 64K installed 1 64K option 1 32K option 2 64K options 1 32K option 1 64 256K option with 128K installed 1 32K option LEX40245 Chapter 6 5160 PC XT 6 9 448Kb Total Memo ry 192Kb 256Kb on System Board 64 256K Option 64K Option 32K Option Card Switches Card Switches Card Switches 1 64 256K option with 192K installed 1 64 256K option with 128K installed 1 64K option 1 64 256K option with 64K installed 2 64K options 3 64K options 1 64 256K option with 128K installed 2 32K options LEX40246 480Kb Total Memory 224Kb 256Kb on System Board 64 256K Option 64K Option 32K Option Card Switches Card Switches Card Switches 1 64 256K option with 192K installed 1 32K option 1 64 256K option with 128K installed 1 64
156. tiply and divide integrated memory management four level memory protection 1 gigabyte 1 073 741 824 bytes of virtual address space for each task and two operating modes the 8086 compatible real address mode and the protected virtual address mode Interface The keyboard uses a bidirectional serial interface to carry signals between the keyboard and system unit Sequencing Key Code Scanning The keyboard is able to detect all keys that are pressed and their scan codes will be sent to the inter face in correct sequence regardless of the number of keys held down Keystrokes entered while the inter face is inhibited when the keylock is on will be lost Keystrokes are stored only when the keyboard is not serviced by the system Buffer The keyboard has a 16character first in first out FIFO buffer where data is stored until the interface is ready to receive it A buffer overrun condition will occur if more than 16 codes are placed in the buffer before the first keyed data is sent The 17th code will be replaced with the overrun code hex 00 The 17th position is reserved for overrun codes If more keys are pressed before the system allows a keyboard output the data will be lost When the keyboard is allowed to send data the charac ters in the buffer will be sent as in normal operation and new data entered will be detected and sent 9 4 Keys All keys are classified as make break which means when a key is pressed
157. to two sections e Switches 1 5 determine the starting address for the expansion memory installed on the option e Switches 6 7 and 8 are not used on the 512Kb 2Mb Memory Expansion option Starting Address Switches 1 through 5 The switch settings can be determined through the fol lowing procedure Assume you have 3 5Mb of expan sion memory installed in your system and you are installing another memory option 1 Establish your starting address by adding the amount of expansion memory already installed 3 5Mb to the starting address for expansion memory 3 5M Amount of expansion memory installed 41 0M Starting address for expansion memory 4 5M Starting address for next option LEX42507 2 In the following table find the values that when added equal 4 5Mb Value in o Open Off umber Position a M 5 4 0M Switch 2 set to Off Position 5M Switch 5 set to Off Position A 12345678 on AUPAGTOC 4 5M Switch Setting for new option LEX42508 _ Figure 8 12 Memory Switch Settings Memory Module Package 1 Power off the system 2 Remove the system unit cover 3 Find the failing memory module package on the system board MAP 0200 Memory in the HMS manual 4 Grasp the memory module packages and lift them from the system board Note Some memory module packages are held in place by two retention tabs The rear memory module package must be removed first Gently spr
158. upper corners LEX40288 bh Figure l 5 Option Static Charge 1 4 Chapter 2 4860 PCjr Infrared Emitter Infrared Receiver LEX40065 Figure 2 l 4860 PCjr The 4860 is a low cost compact desktop microcom puter It is available in two models the 04 and 67 It utilizes an 8088 Microprocessor 64Kb of random access memory RAM and two cartridge slots Fea tures include a 360Kb disk drive and memory expan sion up to 512Kb Infrared Receiver Top Cover Base Diskette Drive Face Plate Kevboard Cord Optional Cordless Keyboard LEX40066 Figure 2 2 4860 PCjr Front view Modem On Off Switch _ External a Audio e i a VO Gii WDD E Power Cassette Serial Direct Keyboard Drive Video Light Pen Composite Television Video Joystick Joystick Spare LEX40067 Figure 2 3 4860 PCjr Rear view Unit Specifications Size Height 97 mm 3 8 in Length 354 mm 13 9 in Depth 290 mm 11 4 in Weight With Diskette Drive W o Diskette Drive 3 71 kg 8 lb 4 oz 2 61 kg 5 lb 8 oz Environment Air Temperature System On 15 6 to 32 2 C 60 to 90 F System Off 10 to 43 C 50 to 110 F Humidity System On 8 to 80 System Off 8 to 80 Heat Output 283 BTU hr max Noise Level 45 dBa Electrical Nominal 120V AC Minimum 104V AC Maximum 127NAC kva 0 082 max Figure 2 4 4860 System Unit
159. uters power Supply EE Battery Keylock Diskette Drive Slots Speaker Control Panel Fixed Disk Drive Slots LEX40088 9 5 5170 System Unit Front View Cover Removed Figure Keyboard The IBM Personal Computer AT utilizes two styles of keyboards The 84 key unit is used on the Models 068 099 239 and 319 The 101 key enhanced unit is used on the Model 339 only However it may be used on _ the Model 319 but it is not supported on the other models 20Mb Fixed Disk Drive The fixed disk drive used in the IBM Personal Com puter AT can store up to 20Mb of data Reading from and writing to this drive is initiated in the same way as with the Personal Computer XT however the IBM Personal Computer AT Fixed Disk and Diskette Drive Adapter may be addressed from different BIOS locations 30Mb Fixed Disk Drive The 30Mb disk drive is a standard feature on Models 239 319 and 339 and is available as an option on other models The 30Mb fixed disk drive can be purchased as a 30Mb upgrade kit and installed in Models 068 and 099 The 30Mb upgrade kit includes the 30Mb fixed disk drive and two BIOS modules to be installed on the system board High Capacity Diskette Drive This diskette drive is capable of reading and writing diskettes in 160Kb 180Kb 320Kb 360Kb and 1 2Mb modes However if a diskette formatted in either the 160Kb 180Kb or 320Kb 360Kb mode is written on by this disket
160. ve this selectable write protect interlock in order to prevent accidental overwriting Note 720Kb diskette drives can use only the 1Mb diskettes Media Drive Compatibility Table The following table identifies the minimum supported level of DOS required to read write or format the applicable media in the installed diskette drives DOS levels are downward compatible with respect to diskette formatting therefore prior formats are sup ported Operation 5 25 Inch 5 25 Inch 3 5 Inch Drives Drives Drives PCjr Convertible PC 4865 XT External Portable Internal 4869 B 5 25 inch diskette formatted to DOS 1 00 DOS 3 00 160Kb Read Write DOS 1 00 NO N A Format No 180Kb Read DOS 2 00 DOS 3 00 Write DOS 2 00 NO N A Format DOS2 00 No 320Kb Read DOS 1 10 Write Format 360Kb DOS 2 00 DOS 2 00 DOS 2 00 DOS 3 00 1 2Mb Read No DOS 3 00 Write No DOS 3 00 N A Format No DOS 3 00 3 5 inch diskette formatted to 720Kb Read DOS 3 20 Write N A N A DOS 3 20 Format DOS 3 20 Figure 1 3 Media Drive Compatibility Table To use this chart find your diskette drive and IBM Personal Computer across the top of the table Then coming down the left column find your media The intersection of the read write format row and your diskette drive and IBM Personal Computer column identifies the minimum DOS level reguired to support the function Where N A appears it indicates eit
161. w 64Kb to 256Kb System Unit When there is a memory failure the address of the failure appears as a 4 character alphanumeric error code followed by 201 If the first character of the error code is 0 1 2 or 3 you have a system board failure The 0 1 2 or 3 indicates which bank has the failing module The third and fourth characters of the 4 character error code indicate which bit module of the bank failed P 0 1 2 3 4 5 6 or 7 For example error code 3040 201 means that the module indicated by the arrow in Figure 4 11 bank 3 bit 6 is the one that failed 4 6 O olz w m all DID Hall UUUUUUUU iU ODDDDDS Of 02 04 OB 10 20 40 80 First 2 characters of error code Last 2 characters of error code Top View of System Board LEX40151 Figure 4 l System Board Top View 5160 5155 XT370 5531 4455 Failing Memory Module Bit Bank Location Color Trimmer Capacitor Keyboard I O System Board Power Connections ETAL pii Tn ne CICIO ii ANON AHA tow hee ee 64K Bank O Random Bank 1 Access Memory Bank 2 Modules Bank 3 Speaker Output Note Banks 0 and 1 may contain 256K RAM modules on 5160 modules 088 089 267 268 277 and 278 LEX41700 Figure 4 12 5160 5155 XT370 5531 4455 Bit Bank Location When there is a memory failure the address of the failure appears as a 7 character alphanumeric error code followed by 201 If the first char
162. which can be used by either the PC 370 P card or by the PC XT This pro vides 512Kb of memory for use in S 370 mode or a total of 640Kb of memory for use in PC XT mode Chapter 6 5160 PC XT ol Chapter 7 5161 Expansion Unit 1 OMb Fixed Disk Drive LEX40079 Figure 7 1 5161 Expansion Unit Expansion Board 7 Receiver Card Power Supply 130 Watt Option Adapt amp Slot for Fixed Fixed Disk Disk D Drive C LEX40080 Figure 7 2 5161 Expansion Unit Cover Removed Note This unit is not supported on 5160 Models 088 089 267 268 277 and 278 The 5161 Expansion Unit provides additional config uration flexibility for the 5150 Personal Computer and the 5160 Personal Computer XT Each expansion unit contains a 10Mb fixed disk drive and eight option extension card slots One additional 1OMb fixed disk drive may be installed for a total of 20Mb of fixed disk storage The power supply used in the expansion unit is a PC XT 130 watt power supply The IBM Expansion Unit option enhances the system unit by adding expansion slots in a separate unit This option consists of an Extender card expansion unit cable and the expansion unit The expansion unit con tains a power supply an expansion board and a Receiver card This option utilizes one expansion slot in the system unit to provide seven additional expan sion slots in the expansion unit Unit Specifications Size Height 142 mm 5 5 in Length 50
163. with very high voltages these instructions are given in IBM safety service memorandums SMs and the safety sections of maintenance information Use extreme care when measuring high voltages Do not use worn or broken tools and testers Ensure that electrical hand tools such as power drills and Wire Wrapl tools are inspected regu larly Never assume that power has been disconnected from a circuit First check that it has been switched off Always look carefully for possible hazards in your work area Examples of these hazards are moist floors nongrounded power extension cables power surges and missing safety grounds Do not touch live electrical circuits with the glass surface of a plastic dental mirror The surface is conductive such touching can cause personal injury and machine damage Unless the maintenance information specifically lets you do not service the following parts with power on them when they are removed from their normal operating places in a machine Power supply units Pumps Blowers and fans Motor generators and similar units This rule ensures correct grounding of the units If an electrical accident occurs _ Use caution do not become a victim your self Switch off power Send another person to get medical aid j Ifthe victim is not breathing decide whether to give rescue breathing These actions are described below Emergency First Aid When giving rescue
164. y Voltages Chapter 4 5150 PC 4 3 mb ek AD CO CD OFT 00 A N System _ Board Connectors Power Supply LEX40155 Figure 4 6 Board Power Connectors Power Supply Voltage Checks If the power supply is not connected to the system board or the disk diskette drives the power supply voltages cannot be correctly measured unless loaded with a 1 5 ohm 25 watt resistor The resistor must be connected across the power supply connector P 9 pins 1 and 6 There is a 3 ohm 25 watt wire wound resistor P NO337213 available Use two resistors in parallel to obtain 1 5 ohms resistance 5 25 Inch Diskette Drive HIN a ee OUND Power Connectors PIN 2 GROUND PIN 1 12V DC PIN 4 F5V DC PIN 3 GROUND PIN 2 GROUND PIN 1 12V DC PIN 6 5V DC PIN 5 5V DC PIN 4 5V DC PIN 3 5V DC PIN 2 GROUND PIN 1 GROUND PIN 6 GROUND PIN 5 GROUND PIN 4 12V DC PIN 3 12V DC PIN 2 KEY PIN 1 PWR GOOD System Board Ww Power Power Connectors On Off System Unit Power Connector IBM Monochrome Display Power Connector Internally Switched LEX40156 Figure 4 7 Voltage Checks Power Supply Fan Connector PIN 2 GROUND PIN 1 12V DC 7 PIN 2 GROUND koz PIN 1 12V DC PIN 4 5V DC PIN 3 GROUND r g PIN 2 GROUND PIN 1 12V DC PIN 4 5V DC PIN 3 GROUND PIN 2 GROUND PIN 1 12V DC PIN 6 5V DC PIN 5 5V DC PIN 4 5V DC PIN 3 5V DC PIN 2 GROUND IN
165. y blank con sisting of two parity modules and four 64Kb x4 memory modules Rear Panel Memory Module Packages Power Supply Connector N 128Kb Memory Display Switen Math Coprocessor Processor LEX42455 Figure 8 5 5162 System Board Keyboard The 5162 PC XT Keyboard is a 101 102 key keyboard This keyboard has a serial interface and attaches to a 5 pin connector in the back of the 5162 via a 9 foot coiled cable Cabling The keyboard cable connects to the system with a 5 pin DIN connector and to the keyboard with a six position SDL connector The following table shows the pin configuration and signal assignments SDL Connector SDL Connector Signal Name Signal Type Pins KBD CLK input Output KBD DATA Input Output Reserved Ground 5 0 Vde Not used Frame Ground Ground Power LEX42456 Figure 8 6 5162 Keyboard Connectors Serial Parallel Adapter One Serial Parallel Adapter is standard in the 5162 This adapter provides one serial port and one parallel port 20Mb Fixed Disk Drive The fixed disk drive used in the 5162 PC XT can store up to 20Mb of data Reading from and writing to this drive is initiated in the same way as the other models of PC XT however the 5162 PC XT Fixed Disk and Diskette Drive Adapter may be addressed from dif ferent BIOS locations High Capacity Diskette Drive One 5 25 inch high capacity diskette drive in addition to the standard high capacity diskett
166. yboard Cable Continuity Connections B3 LEX40148 Figure 2 29 Keyboard Cable Pin Placements Chapter 2 4860 PCjr 2 9 wN Chapter 3 5140 PC Convertible LEX41040 Figure 3 1 5140 PC Convertible System Information The IBM 5140 PC Convertible is a portable personal computer designed for professional applications and personal productivity It is designed to enhance per sonal computing capability with multiple power options The uniqueness of the system unit is the inte gration of microprocessor display diskette drives key board memory battery power supply and optional modem within a full function system that can be carried in one hand and used in most environments The IBM 5140 maintains compatibility with 5 25inch drive systems through asynchronous communications and 3 5inch drive options IBM 4865 on existing PCs The IBM PC Convertible features an 80C88 Micro processor and 256Kb of user memory User memory can be expanded to 512Kb with the addition of 128Kb memory cards installed by the user The 3 5 inch diskette drive is a double sided drive with 720Kb of formatted storage capacity The 80 column x 25 line detachable liquid crystal display features a bonding process that reduces glare and increases visibility Unit Specifications Size Height 68 0 mm 2 68 in Length 374 0 mm 14 72 in Width 312 0 mm 12 28 in Weight 5 5 kg 12 17 1b Environment Air Temperature
167. ystem configura tion data Attachment is provided for the 5170 Key board and a display unit The display can be either the 5151 Monochrome Display or a 5153 Color Display This system can attach to a host system via any of the communication adapters however it is not host dependent Model 899 Includes a new system board and a Store Loop Adapter All other avail able features are the same as the Model 099 Includes a new system board and a Store Loop Adapter All other avail able features are the same as the Model 239 Includes a new system board and a Store Loop Adapter All other avail able features are the same as the Model 339 This is a special bid model It is the same as the Model 849 with the IBM 30Mb Hard File and the Serial Parallel card removed This is a special bid model It is the same as the Model 849 with the IBM 30Mb Hard File the Serial Parallel card and the Loop Adapter card removed It has the Token Ring Adapter added FC 3391 and FC 3390 Model 839 Model 849 Model 819 Model 820 Input to the system is via a keyboard same as the appropriate base Models 099 239 339 and 849 Loop Adapter P N6347798 This s an S Loop Adapter and allows the store con troller to drive up to 64 4683 Model 001s Each 4683 Model 001 can have a 4683 Model 002 attached The 4683 Terminal can have multiple I O devices attached This adapter is standard in the store controller models of the 5170 Persona

Personal Computer Family Service Information Manual - IBM

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