DECstation 212LP/316/320SX Service Manual
Contents
1. 2 13 2 6 Hard Disk and Diskette Drive Troubleshooting Procedures 2 16 2 7 Monitor Troubleshooting Procedures 2 17 3 1 DECstation Standard Field Replaceable Units 3 1 3 2 DECstation Optional Field Replaceable Units 3 2 3 3 212LP Main Logic Board J umper Settings 3 35 3 4 316sx Main Logic Board J umper Settings 3 37 3 5 DECstation 316sx Main Logic Board Switch Settings 3 39 3 6 320sx Main Logic Board J umper Settings 3 41 3 7 DECstation 320sx Main Logic Board Switch Settings 3 43 A 1 DECstation Base System Power Consumption A 1 B 1 Parallel I O Port Connector a B 1 B 2 RS 232C Serial Port Connector aasa aaa B 2 B 3 Keyboard and Mouse Connectors B 2 B 4 Video Port Connector 0 ccc ees B 3 About This Guide This service guide is designed to help you diagnose and repair the DECstation 212LP DECstation 316sx and DECstation 320sx personal computers This guide contains information on servicing the base system only Specific information on installing replacing and configuring options is covered in the individual option installation guides supplied with those products and is available to Customer Service personnel in a kit Guide Organization The guide is organized as follows e Chapter 1 provides an overview of the DECstation systems e Chapter 2 details troubleshooting i2. displays the message Abort Retry gnore Diskette drive cannot read or write information Problem exists with the drive or drive adapter Possible corrupted files Hard disk is affected by static electricity The diskette has been demagnetized Improperly formatted diskette The diskette drive is empty Diskette is not formatted Make sure all jumpers are set correctly Restore disk from back up files Move system away from any motors magnetic devices or photocopiers Increase the humidity in the room and use anti static mats around the system Make sure the disk drive cable is correctly installed Replace the diskette Reformat the diskette Insert a diskette into the diskette drive Use a preformatted diskette Troubleshooting 2 17 Table 2 6 Cont Hard Disk and Diskette Drive Troubleshooting Procedures Problem Possible Cause Corrective Action Diskette is worn or damaged Try another diskette 2 6 3 Monitor Problems Table 2 7 lists some common monitor problems possible causes and suggested corrective actions If the corrective action does not work and it is possible to run the Diagnose diagnostics use them to further isolate the problem and then replace the failing FRU Table 2 7 Monitor Troubleshooting Procedures Problem Possible Cause Corrective Action Monitor green LED is not on There is no light at the F1 key whe
3. 1 Power Up Beep Codes 2 Try booting from the operating system startup diskette a If the system does not boot verify that all jumpers are set correctly Reboot the system after verifying the jumper settings b Lack of beep codes and video indicate a possible bad main logic board c If the system still does not boot remove all options and try to boot the system d Replace the Digital certified options one at a time and see if the system powers up and boots each time an option is replaced or a disk drive is reconnected 3 When the system boots refer to Section 2 4 4 2 44 System Boots The DECstation can have a problem but still boot on power up This procedure is to help determine the problem with a DECstation that boots but still emits error beep codes or displays an error message Before starting this procedure be sure you have done the steps in Section 2 4 1 CAUTION The system must be disconnected from any network before running the Diagnose diagnostics Troubleshooting 2 7 1 Determine what the failure is Refer to Section 2 5 for a list of possible error messages If there are no error messages refer to Section 2 6 for a list of symptoms and possible causes 2 Run the Diagnose diagnostics 3 Replace the necessary FRU 2 5 Error Codes and Messages During the power up sequence the DECstation executes built in diagnostic and bootstrap routines During the first portion of power up testing the system g
4. and services offered by Digital computers and servers 1 2 DECstation Base System The DECstation base system unit consists of the following e Main logic board containing 12 MHz Intel 80286 processor DE Cstation 212p only 16 MHz Intel 80386sx processor DECstation 316sx only 20 MHz Intel 80386sx processor DE Cstation 320sx only Socket for optional Intel 80287 DECstation 212LP only or Intel 80387sx DE Cstation 316sx only math coprocessor Socket for optional 386sx math coprocessor 1 minimum to 4 maximum Mbytes of SIMM RAM memory Serial and parallel ports PS 2 compatible mouse port Intelligent Drive Electronics IDE drive connector 16 bit VGA Video Graphics Array controller on the main logic board Three 16 bit also usable as 8 bit expansion slots for industry standard options e 100 watt power supply with auxiliary power output IEC connector e 3 5 inch 1 44 Mbyte diskette drive Overview 1 3 1 3 DECstation Options The following are options available for the DECstation base system Color or monochrome VGA analog monitor 40 80 170 or 320 Mbyte SCSI hard disk drive 150 Mbyte SCSI Tape cartridge system 20 40 120 or 105 Mbyte IDE hard disk drive 60 Mbyte streaming tape drive QI C 40 8514 A Compatible Graphics Adapter 3 5 inch 1 44 Mbyte diskette drive 5 25 inch 1 2 Mbyte diskette drive 5 25 inch 360 Kbyte diskette drive 101 key enhanced keyboard co
5. follows e DECstation 212LP Use a small flat blade screwdriver and alternately lift each end of the coprocessor Figure 3 11 e DECstation 316sx and DECstation 320sx Use a special tool to simultaneously lift each corner of the coprocessor Figure 3 12 NOTE While lifting the coprocessor out of the socket be careful not to damage it or the socket or bend any pins Before installing the new math coprocessor straighten any pins if necessary so they align with the holes in the socket Make sure pin 1 of the math coprocessor is aligned with pin 1 of the socket NOTE Facing the front of the DECstation 212LP the pin 1 location is indicated by a dot near the lower left corner of the socket Figure 3 11 Facing the front of the DECstation 316sx and DECstation 320sx the pin 1 location is indicated by a numeral 1 near the lower right corner of the socket Figure 3 12 Install the new math coprocessor in the socket by alternately pressing each end into the socket Do this until it is firmly seated in the socket Figure 3 11 and Figure 3 12 FRU Replacement 3 23 Insert version LJ 1701 Figure 3 11 Replacing the 212LP Math Coprocessor 3 24 FRU Replacement New Illustration LJ 1700 Figure 3 12 Replacing the 316sx Math Coprocessor FRU Replacement 3 25 New Illustration LJ 1785 Figure 3 13 320sx Math Coprocessor Replacement 3 26 FRU Replacement 3 2 13 Main Logic Board Replacement Replace the main lo
6. only Digital supplied spares Table 3 1 lists standard FRUs and their part numbers for the DECstation systems Table 3 2 lists optional FRUs and their part numbers Table 3 1 DECstation Standard Field Replaceable Units Digital Part FRU Number DECstation 2121p main logic board with 1 Mbyte 29 28137 01 memory DECstation 316sx main logic board with O Kbyte 29 28112 01 memory DECstation 320sx main logic board with 1 Mbyte 29 28679 01 memory fixed 100W power supply with fan and IEC assembly 29 28113 01 Rear bezel with IEC 29 28114 01 Card guide 29 28115 01 Speaker with cable assembly 29 28138 01 3 2 FRU Replacement Table 3 1 Cont DECstation Standard Field Replaceable Units Digital Part FRU Number Actuator with LED assembly 29 28116 01 Reset button assembly 29 28117 01 DECstation 2121P battery and real time dock 29 28242 01 DECstation 316sx 320sx battery 29 27439 01 Floppy drive ribbon cable assembly 29 28108 01 Floppy drive 3 5 inch 1 44 Mbyte 30 30942 01 Option slot PCB assembly 29 28109 01 Keyboard adapter plug 29 28100 01 Top front cover assembly without nameplate 29 28110 01 Bezel 212 nameplate not available Bezel 316sx nameplate 29 28117 01 DECstation 2121r utilities diskette 29 28243 01 DECstation 316sx utilities diskette 29 28111 01 DECstation 320sx utilities diskette 29 28854 01 DECstation VGA Graphics Utilities and User Guides n a set of two diskettes DECstation VGA 1024 Graphics Utilities an
7. with 640 x 480 resolution South Hemisphere IEC plug 1 8 Overview Table 1 2 Cont Monitors Model Number Part Number Description PC4XV A5 30 32318 01 VGA monochromatic 14 international version 120 Vac 60 Hz with 640 x 480 resolution South Hemisphere IEC plug PC4XV A6 30 33966 01 VGA monochromatic RGB 14 international version 240 Vac 50 Hz with 640 x 480 resolution North Hemisphere IEC plug PC4XV A7 30 33967 01 VGA monochromatic RGB 14 international version 240 Vac 50 Hz with 640 x 480 resolution South Hemisphere IEC plug PC4XV BA 30 30901 01 VGA color RGB 14 for all versions of DECstation personal computers Requires PC4XG AA or AB VGA adapter except on the PC44 models Displays at 640 x 480 colors 120 Vac 60 Hz US and Canada PC4XV B2 30 32313 01 VGA color RGB 14 international version 120 Vac 60 Hz with 1024 x 768 resolution North Hemisphere IEC plug PC4XV B3 30 32315 01 VGA color RGB 14 international version 240 Vac 50 Hz with 640 x 480 resolution North Hemisphere IEC plug PC4XV B4 30 32316 01 VGA color RGB 14 international version 240 Vac 50 Hz with 640 x 480 resolution South Hemisphere IEC plug PC4XV B5 30 32314 01 VGA color RGB 14 international version 120 Vac 60 Hz with 1024 x 768 resolution South Hemisphere IEC plug Overview 1 9 Table 1 2 Cont Monitors Model Number Part Number Description PC4XV B6 30 33968 01 SVGA color RGB 14 i
8. 1 Remove the cover Section 3 2 4 and open the system unit Section 3 2 5 2 Remove the two screws that secure the chassis support to the system unit one in the front of the system unit and one in the rear of the chassis support Figure 3 5 3 Lift the chassis support and option slot PCB upward and out of the system unit Figure 3 5 4 Remove the two screws securing the option slot PCB to the chassis support Figure 3 5 5 Secure the new option slot PCB to the chassis support Figure 3 5 6 Reinstall the chassis support and option slot PCB by reversing these steps CAUTION There is a mylar insulator in back of the option slot PCB Make sure it is installed and in position when replacing the option slot PCB NOTE When replacing the chassis support make sure the slotted tab at the rear connects to the rear panel 3 14 FRU Replacement New Illustration LJ 1707 Figure 3 5 Removing the Bus Adapter Board FRU Replacement 3 15 3 2 8 Speaker Replacement Replace the speaker as follows 1 Remove the cover Section 3 2 4 and open the system unit Section 3 2 5 Disconnect the speaker cable from the main logic board Figure 3 1 Remove two 5 16 inch nuts and lock washers securing the speaker to the bottom of the chassis Figure 3 1 Remove the speaker Replace the speaker and connect the cable to the main logic board 3 2 9 Battery Replacement Replace the battery as follows 1 Remove t
9. 21 installed 1Default Setting 3 42 FRU Replacement 3 3 5 DECstation 320sx Main Logic Board Switch Settings Figure 3 23 shows the location of the switch on the main logic board Table 3 7 describes the switch configurations and provides a recommended default setting for each switch New Illustration LJ 1788 Figure 3 23 DECstation 320sx Main Logic Board Switch Location FRU Replacement Table 3 7 DECstation 320sx Main Logic Board Switch Settings Switch Feature Description Setting Parallel port Enabled Sw1 on Disabled SW off Parallel port LPT1 378 37F HEX SW2 on address LPT2 278 27F HEX SW2 off Serial port Enabled SW3 on Disabled SW3 off Serial port COMM1 3F8 3FF HEX SW4 on address COMM2 2F8 2FF HEX SW4 off Parallel port mode Enabled unidirectional SW5 on Enabled bi directional SW5 off Diskette drive Primary 3F0 3F7 HEX SW6 on address Secondary 370 377 HEX SW6 off IDE drive Enable IDE connector SW7 on Disable IDE connector SWT7 off IDE drive address Primary 1F0 1F7 HEX for CSO SW8 on 376 377 HEX for CS1 Secondary 170 177 HEX for CSO SW8 off 376 377 HEX for CS1 1Default Setting 3 43 A Power Consumption The following table lists the power consumption for the DECstation base systems NOTE The reserve current row indicates the amount of current available for options and may be distributed between the other slots as needed Table A 1 DECstation Base Sys
10. Bh ae ee 2 2 Normal Power Up 0000 cece eee tees 2 3 Troubleshooting Procedures 000 cee es 2 3 Getting Started 2 2 20 2 000202 2 2 eee 2 4 NGO POWEN da A ey AE eee ae LERET AN 2 5 System Does Not Boot 00 cece eee 2 6 System Boots ma kei wuld a 2 6 iv Contents 2 5 Error Codes and Messages a 2 7 2 5 1 Power Up Beep Codes cece es 2 7 2 5 2 Fest Messages aa andres aye Res we ae a ea Ge ee Za 2 11 2 6 Troubleshooting by Symptom 000 cece 2 13 2 6 1 System Unit Problems 0000 e eee eee ees 2 13 2 6 2 Disk Related Problems 00 00 eee eeeees 2 16 2 6 3 Monitor Problems 2 17 2 7 Troubleshooting Problems Occurring During System Operation Ste Saad Aiea Stead Soe 2 20 2 8 Using the System Utilities Diskette 2 21 2 8 1 Running the Setup Program 000 eee eee 2 21 3 FRU Replacement 3 1 Introdudhionisciewcs rt tido Seed NTG a Seed 3 1 3 1 1 Before Replacing FRUS 00 cece eee eee 3 5 3 2 Replacing FRUS oid ed oan ee ee de deena 3 5 3 2 1 Keyboard Replacement 000 cece eee ees 3 8 3 2 2 Monitor Replacement 0000 c cece eee eee 3 8 3 2 3 Mouse Replacement 0000 cece eee ees 3 8 3 2 4 System Cover Removal 0 000 cee eee 3 9 3 2 5 Opening the System Unit aaa 3 10 3 2 6 Option Board Replacement 3 12 3 2 7 Option Slot Printed Circuit Board
11. DECstation 212LP 316sx 3208x Service Guide Order Number EK PC44A SV 002 Digital Equipment Corporation Second Edition October 1990 The information in this document is subject to change without notice and should not be construed as a commitment by Digital Equipment Corporation Digital Equipment Corporation assumes no responsibility for any errors that may appear in this document The software described in this document is furnished under a license and may be used or copied only in accordance with the terms of such license No responsibility is assumed for the use or reliability of software on equipment that is not supplied by Digital Equipment Corporation or its affiliated companies Restricted Rights Use duplication or disclosure by the U S Government is subject to restrictions as set forth in subparagraph c 1 ii of the Rights in Technical Data and Computer Software clause at DFARS 252 227 7013 Copyright O Digital Equipment Corporation 1990 All Rights Reserved Printed in U S A FCC NOTICE The equipment described in this manual has been certified to comply with the limits for a Class B computing device pursuant to Subpart J of Part 15 of FCC Rules Only peripherals computer input output devices terminals printers etcetera certified to comply with the Class B limits may be attached to this computer Operation with noncertified peripherals may result in interference to radio and television reception This equipme
12. I R eboot other keys to continue 31 Unexpected type 02 interrupt at xxxx Type S hut off NMI R eboot other keys to continue 32 Enter Password 33 Password is incorrect 34 Password OK 35 Password has been removed 36 New password has been installed 37 System halted Must power down Troubleshooting 2 13 2 6 Troubleshooting by Symptom This section describes causes and corrective actions for minor system problems that you can fix The troubleshooting procedures are separated into system unit hard disk and diskette drives monitor and pointing device problems 2 6 1 System Unit Problems Table 2 5 lists some common problems with the system unit possible causes and suggested corrective actions If the corrective action does not work and it is possible to run the Diagnose diagnostics use them to further isolate the problem and then replace the failing FRU Table 2 5 System Unit Troubleshooting Procedures Problem Possible Cause Corrective Action No response when the system is turned on Power is on but there is no monitor display System is not plugged in No power at wall outlet Voltage select switch incorrectly set Brightness and contrast controls are not set properly Monitor is off Monitor cable incorrectly installed Turn the system off Plug in the system then turn the system on again Use a working wall outlet Make sure the 115 230 Vac voltage select switc
13. IBOL UNIBUS DEC CMS EduSystem VAX DEC MMS IAS VAXcluster DECnet MASSBUS VMS DECsystem 10 PDP VT DECSYSTEM 20 PDT DECUS RSTS DE Cwriter RSX dliloli tlal i MS DOS is a registered trademark of Microsoft Corporation Velcro is a trademark of VELCRO USA Inc IBM and IBM PC AT are registered trademarks of International Business Machines Corporation Intel is a trademark of Intel Corporation This document was prepared and published by Educational Services Development and Publishing Digital Equipment Corporation 4 1 1 1 2 1 3 1 3 1 1 4 1 4 1 1 4 2 1 4 3 1 4 4 1 4 5 1 4 6 1 4 7 2 1 2 2 2 3 2 4 2 4 1 2 4 2 2 4 3 2 4 4 Contents About This Guide vii Overview INtrOdUCtiON ns oe eee hee Ren ies Bee he Eee es 1 1 DECstation Base System ee 1 2 DECstation Options 1 3 System Unit Layout 2 0 0 eee 1 4 DECstation System Configurations 1 4 DECstation 212LP Main Logic Board 1 6 DECstation 316sx Main Logic Board 1 6 DECstation 320sx Main Logic Board 1 6 Power Supply occcoccococc ees 1 7 MONITO austero rios Bie Pak a Gd Ge hee 1 7 Enhanced Keyboards 00 0c cece eee ees 1 9 1 4 6 1 101 K ey Enhanced Keyboard 0000 1 9 1 4 6 2 LK250 Keyboard 00 cece eee es 1 9 Math Coprocessor 0 0 0 000 cece eee ees 1 10 2 Troubleshooting Special TOOS a bee ee ek te RA 2 1 Diagnostic da we
14. OS error numbers and the corresponding error messages that displays on the screen Table 2 4 BIOS Error Messages Error Number Error Message 01 Gate A20 failure 02 Unexpected interrupt in protected mode 03 Unexpected SW interrupt at xxxx xxxx Type S hut off NMI R eboot other keys to continue 04 Memory tests terminated by keystroke 05 Memory yyyyy failure at xxxx read xxxx expecting xxxx 06 Display adapter failed using alternate 07 No timer tick interrupt 08 Shutdown failure 09 Timer chip counter 2 failed 10 Keyboard xxxxx failure 11 Diskette subsystem reset failed 12 Diskette drive 0 seek failure 13 Diskette drive 1 seek failure 14 Hard disk configuration error 15 Hard disk controller failure 16 Hard disk failure 17 Time of day dock stopped 18 Invalid configuration information please run SETUP program 2 12 Troubleshooting Table 2 4 Cont BIOS Error Messages Error Number Error Message 19 Time of day not set please run SETUP program 20 Keyboard is locked please unlock 21 Optional ROM bad checksum xx 22 Strike the F1 key to continue 23 Diskette read failure 24 Not a boot diskette 25 No boot device available 26 Hard disk read failure 27 No boot sector on hard disk 28 Insert system diskette and Strike the F1 key to retry boot 29 I O card parity interrupt at xxxx xxxx Type S hut off NMI R eboot other keys to continue 30 Memory parity interrupt at xxxx xxxx Type S hut off NM
15. Parallel Port Enabled unidirectional 1 SW5 on Mode SW5 Enabled bi directional SW5 off Diskette Drive Primary 3F 0 3F 7 HEX SW6 on Address SW6 Secondary 370 377 HEX SW6 off IDE Drive Enable IDE connector SW7 on Enable SW7 Disable IDE connector SW7 off IDE Drive Primary 1F0 1F7 HEX for CSO SW8 on Address SW8 376 377 HEX for CS1 Secondary 170 177 HEX for CSO SW8 off 376 377 HEX for CS1 1Default Setting 3 40 FRU Replacement 3 3 4 320sx Main Logic Board Jumpers Figure 3 22 shows the location of the jumpers on the main logic board Table 3 6 describes the jumper configurations and provides a recommended default setting for the jumpers New Illustration LJ 1787 Figure 3 22 320sx Main Logic Board Jumper Locations FRU Replacement 3 41 Table 3 6 320sx Main Logic Board Jumper Settings Feature Description J umper Setting BIOS ROM Type 256 Kbyte E5 and E6 installed 32 KBx8 El and E2 installed Reserved for future use Parallel port interrupt Serial port interrupt Video mode Video interrupt On Board video enable Reserved for future use IRQ5 IRQ7 IRQ3 IRQ4 Color Monochrome monitor Disable Enabled IRQ9 Enabled VGA disabled Reserved for future use E13 and E 14 installed E14 and E 15 installed E17 and E 18 installed E16 and E 17 installed E8 and E9 installed E7 and E8 installed E22 E23 and E24 fixed E19 and E20 installed E20 and E
16. Replacement 3 13 3 2 8 Speaker Replacement eee 3 15 3 2 9 Battery Replacement 0 00 cece ees 3 15 3 2 10 Reset Button Removal 0 00 c eee eee 3 17 3 2 11 Single ln Line Memory Module Replacement 3 19 3 2 12 Math Coprocessor Replacement 05 3 22 3 2 13 Main Logic Board Replacement 4 5 3 26 3 2 14 Floppy Drive Replacement a 3 30 3 2 15 Replacing An Optional Floppy Drive 3 30 3 2 16 Replacing an Optional Hard Disk or Tape Drive 3 30 3 2 17 DECstation Power Supply Removal 3 32 3 3 Main Logic Board J umpers 00 0c eee ees 3 34 3 3 1 212LP Main Logic Board J umpers 3 34 3 3 2 316sx Main Logic Board J umpers 3 36 Contents v 3 3 3 DECstation 316sx Main Logic Board Switch Settings 3 3 4 320sx Main Logic Board J umpers 3 3 5 DECstation 320sx Main Logic Board Switch Settings A Power Consumption B Peripheral Interface Index Figures 1 1 DECstation Personal Computer 0 00 1 2 System Unit Layout 0 00 00 000000 3 1 Exploded View of DECstation Chassis 3 2 Exploded View of DECstation Main Logic Board and Options 3 3 Removing the DECstation System Cover 3 4 Opening the DECstation System Lhnit 3 5 Removing the Bus Adapter Board 3 6 Re
17. Serial port interrupt Video mode Video port interrupt On board video 128 Kbyte 16 KB 256 Kbyte 32 KB 512 Kbyte 64 KB IRQ5 select IRQ7 select IRQ3 select IRQ4 select Color monitor Monochrome monitor Disable RQ9 Enabled IRQ9 VGA enabled VGA disabled E2 and E3 installed E5 and E6 installed El and E2 installed E5 and E6 installed E1 and E2 installed E4 and E5 installed E19 and E20 installed E20 and E21 installed E16 and E18 installed E14 and E16 installed E7 and E8 installed E8 and EQ installed E25 and E26 No connection E26 and E27 installed E33 and E 34 installed E34 and E35 installed 1Default Setting 3 38 FRU Replacement 3 3 3 DECstation 316sx Main Logic Board Switch Settings Figure 3 21 shows the location of the switch on the main logic board Table 3 5 describes the switch configurations and provides a recommended default setting for each switch New Illustration LJ 1693 Figure 3 21 8 DECstation 316sx Main Logic Board Switch Location FRU Replacement 3 39 Table 3 5 DECstation 316sx Main Logic Board Switch Settings Switch Feature Description Setting Parallel Port Enabled SW1 on Enable SW1 Disabled SW1 off Parallel Port LPT1 378 37F HEX SW2 on Address 5W2 LPT2 278 27F HEX SW2 off Serial Port Enabled SW3 on Enable SW3 Disabled SW3 off Serial Port COMM1 3F8 3FF HEX SW4 on Address SW4 COMM2 2F8 2FF HEX SW4 off
18. ar insulator under the main logic board Make sure it is installed and in position when replacing the main logic board Figure 3 14 and Figure 3 15 New Illustration LJ 1699 Figure 3 14 Removing the 212LP Main Logic Board 3 28 FRU Replacement New Illustration LJ 1698 Figure 3 15 Removing the 316sx Main Logic Board FRU Replacement 3 29 New Illustration LJ 1786 Figure 3 16 Removing the 320sx Main Logic Board 3 30 FRU Replacement 3 2 14 Floppy Drive Replacement Replace the floppy drive as follows Figure 3 17 1 w o O NoU A Remove the cover Section 3 2 4 and open the system unit Section 3 2 5 Remove the ribbon cable from the back of the drive Remove the three mounting screws that hold the drive in place One screw is located underneath the left side and two are on the right side of the floppy Remove the floppy disk drive Set the switch on the new drive to match that of the old drive Install the new drive and re install the three mounting screws Reconnect the ribbon cable to the floppy drive After replacing the drive reconnect all system cables Verify the operation of the new drive 10 Reinstall the system cover 3 2 15 Replacing An Optional Floppy Drive To remove or replace an optional floppy disk drive refer to the appropriate option installation guide 3 2 16 Replacing an Optional Hard Disk or Tape Drive To remove or replace an optional hard disk or tape drive refer to th
19. ary Beep Codes Possible Beep Code Problem Corrective Action Two short Keyboard Be sure the keyboard cable is firmly beeps failure connected Hard disk Be sure the drive cables are firmly failure connected and all drive and adapter jumpers are set correctly Diskette drive Be sure drive cables are firmly failure connected and the drive switch is set correctly Tape drive Be sure the drive cables are firmly failure connected and all drive and host adapter jumpers are set correctly Invalid Check the information entered with configuration the Setup utility Configuration Check the information entered with record bad the Setup utility See the hard disk installation guide for configuration information Check the CMOS battery connection Clock chip Turn the computer off wait 20 lost power seconds and then turn it on again Check the CMOS battery connection Long short Video failure Be sure the VGA jumper setting is long short enabled on the main logic board beep Several BIOS ROM Check cable connections and jumper bursts of CMOS and switch settings If the problem beeps DMA RAM persists there might be a problem interrupt or on the main logic board read write errors 11f the system generates bursts of beeps refer to Table 2 3 for a list of specific failure locations corresponding to the particular numeric beep code pattern Troubleshooting 2 9 When several bursts of beeps are generated listen carefully and remembe
20. ble 3 3 describes the jumper configurations and provides a recommended default setting for the jumpers New Illustration LJ 1695 Figure 3 19 212LP Main Logic Board Jumper Locations FRU Replacement 3 35 Table 3 3 212LP Main Logic Board Jumper Settings Feature Description J umper Setting Video interrupt On board video BIOS ROM type Expansion bus speed Memory parity check Standard IRQ9 Enabled Disabled 4 Mbyte or 8 Mbyte ROM Two 32 Kbyte EEPROMs U17 and U18 Same as system clock speed 1 One half system clock speed Enabled Disabled E12 and E13 No connection E12 and E13 installed E15 and E16 installed E14 and E15 installed E10 and E11 installed E9 and E10 installed E2 and E4 installed E4 and E8 installed E5 and E6 installed E6 and E7 installed 1Default Setting 3 36 FRU Replacement 3 3 2 316sx Main Logic Board Jumpers Figure 3 20 shows the location of the jumpers on the main logic board Table 3 4 describes the jumper configurations and provides a recommended default setting for the jumpers New Illustration LJ 1694 Figure 3 20 316sx Main Logic Board Jumper Locations FRU Replacement 3 37 Table 3 4 316sx Main Logic Board Jumper Settings Feature Description J umper Setting Math 80387sx installed E30 and E31 installed coprocessor 80387sx not installed E31 and E 32 not installed BIOS ROM type Printer port interrupt
21. d User n a Guides set of two diskettes Table 3 2 DECstation Optional Field Replaceable Units Digital Part FRU Number 14 VGM100 Monochrome monitor US 30 30902 01 14 VGM300 Color monitor US 30 30901 01 14 Color monitor 120V North Hemisphere 30 32313 01 FRU Replacement Table 3 2 Cont DECstation Optional Field Replaceable Units Digital Part FRU Number 14 Color monitor 120V South Hemisphere 30 32314 01 14 Color monitor 240V North Hemisphere 30 32315 01 14 Color monitor 240V South Hemisphere 30 32316 01 14 Color monitor 120V North Hemisphere 30 32317 01 14 Color monitor 120V South Hemisphere 30 32318 01 14 Color monitor 240V North Hemisphere 30 32319 01 14 Color monitor 240V South Hemisphere 30 32320 01 512 Kbyte 80 ns SIMM Memory Kit 320sx 19 32974 02 512 Kbyte 100 ns SIMM Memory Kit 2121p 316sx 19 32974 01 2 Mbyte 80 ns SIMM Memory Kit 320sx 19 32975 02 2 Mbyte 100 ns SIMM Memory Kit 2121p 316sx 19 32975 01 1 2 Mbyte diskette drive 5 25 30 31071 01 360 Kbyte diskette drive 5 25 30 33156 01 16 bit SCSI adapter board AHA 1540 A 20 30945 01 16 bit SCSI adapter board AHA 1540 B 20 33154 01 SCSI drive ribbon cable assembly 29 27441 01 SCSI hard disk drive 40 M byte 3 5 30 30903 01 SCSI hard disk drive 80 M byte 3 25 30 30904 01 SCSI hard disk drive 170 Mbyte 5 25 30 30905 01 SCSI hard disk drive 320 Mbyte 5 25 30 33157 01 Tape drive 60 Mbyte QIC 40 30 34181 01 Mini Tape cart
22. e System Configurations Model Number Description PC443 A3 Same as PC443 A2 but with the power supply factory set at 240 Vac 50 Hz 1 4 1 DECstation 212LP Main Logic Board The DECstation 212LP main logic board contains a 12 MHz Intel 80286 CPU microprocessor a socket for an optional Intel 80287 math coprocessor floppy disk drive controller serial and parallel ports PS 2 compatible mouse port IDE drive connector 16 bit VGA controller 800 x 600 four SIMM memory expansion slots and one bus expansion adapter connector The bus expansion adapter plugs into the main logic board and contains three 16 bit also usable as 8 bit expansion slots 1 4 2 DECstation 316sx Main Logic Board The DECstation 316sx main logic board contains a 16 MHz Intel 80386 CPU microprocessor a socket for an optional Intel 80387sx math coprocessor floppy disk drives controller serial and parallel ports PS 2 compatible mouse port IDE drive connector 16 bit VGA controller 800 x 600 four SIMM memory expansion slots and one bus expansion adapter connector The bus expansion adapter plugs into the main logic board and contains three 16 bit also usable as 8 bit expansion slots 1 4 3 DECstation 320sx Main Logic Board The DECstation 320sx main logic board contains a 20 MHz Intel 80386 CPU microprocessor a socket for an optional Intel 80387sx math coprocessor floppy disk drives controller serial and parallel ports PS 2 compatible mouse p
23. e appropriate option installation guide FRU Replacement 3 31 New Illustration LJ 1697 Figure 3 17 Replacing the Floppy Disk Drive 3 32 FRU Replacement 3 2 17 DECstation Power Supply Removal Remove the DECstation power supply as follows Figure 3 18 1 Remove the cover Section 3 2 4 and open the system unit Section 3 2 5 Remove the ribbon cable from the back of the drive Disconnect the power supply and power on LED cables from the main logic board Remove the LED actuator arm from the power supply by sliding the tie wrap toward the front of the system unit and lifting the arm up and off the power supply switch Facing the front of the system unit remove the three mounting screws on the right side of the power supply Tilt the carriage up 90 and remove the two screws on top of the carriage holding the power supply Separate the power supply unit from the system unit by sliding it away from the front of the system unit NOTE Check the power supply fuse before installing a new power supply The fuse is rated at 4 AMPS 250 Vac and is approx 3 4 inch in length To replace the power supply unit perform the previous steps in reverse order FRU Replacement 3 33 New Illustration LJ 1696 Figure 3 18 Removing the DECstation Power Supply 3 34 FRU Replacement 3 3 Main Logic Board Jumpers 3 3 1 212LP Main Logic Board Jumpers Figure 3 19 shows the location of the jumpers on the main logic board Ta
24. e diagnostics are run at system power up and verify the operation of the machine Error messages are given in two formats beep codes and message displays on the screen These error messages are explained in Section 2 5 Troubleshooting 2 3 2 3 Normal Power Up In anormal system power up the following takes place 1 Power to the monitor and system unit is turned on Both power indicators are on The system executes its power up tests displays the BIOS ROM version assorted copyright information and the memory size Depending on the option s installed in the system additional information may be displayed If there is an error during any of the power up tests the system either generates a beep error code or displays an error message The system generates a single beep displays information about the operating system and gives the date prompt Note that the actual information displayed at this time depends on the system software 2 4 Troubleshooting Procedures This section describes three troubleshooting procedures that can be used depending on the state of the system Each procedure will get the system to a state where it can run the Diagnose diagnostic package Perform the steps in Section 2 4 1 and then go to the recommended procedure CAUTION Before troubleshooting the DE Cstation it must be disconnected from any network 2 4 Troubleshooting 2 4 1 Getting Started The following steps prepare you for troubleshoot
25. e following sections Special tools Diagnostics Normal power up Troubleshooting procedures Error codes and how to use them Troubleshooting by symptom Troubleshooting during system operation Using the System Utilities diskette For information about jumper settings troubleshooting and servicing of the DEC EtherWORKS option board and related network connections refer to the DEC Etha WORKS Service Guide 2 1 Special Tools The special tools needed to troubleshoot the DE Cstation system are given in Table 2 1 2 2 Troubleshooting Table 2 1 Troubleshooting Tools Tool Part Number Definition Diagnose 29 27462 01 These standalone diagnostics Diagnostics are available separately For information about using these diagnostics refer to the accompanying manual Tri wrap FD 10164 00 This triple connector consists Loopback of a male 25 pin parallel Connector loopback connector a female 25 pin serial loopback connector and a female 9 pin serial loopback connector bundled together and housed in a streamlined package DECstation 29 28243 01 Use to reconfigure the CPU 2121r Utilities when options are installed Diskette DECstation 29 28111 01 Use to reconfigure the CPU 316sx Utilities when options are installed Diskette DECstation 29 28854 01 Use to reconfigure the CPU 320sx Utilities when options are installed Diskette 2 2 Diagnostics The DECstation has internal ROM based diagnostics to aid in troubleshooting Thes
26. em administrator that you are going to disconnect the ThinWire T connector from the computer Do not disconnect any cable or terminator from the T connector Doing so disrupts network operation CAUTION Always use a grounded wrist strap and grounded work surface to earth ground when opening the system unit or handling any external component and its replacement Static electricity can damage printed circuit boards and mass storage devices e After replacing a FRU verify that it and the system function properly 3 2 Replacing FRUs This section describes how to remove and replace the various FRUs in the DECstation Figure 3 1 shows an exploded view of the DECstation chassis Figure 3 2 shows an exploded view of the DECstation main logic board and options 3 6 FRU Replacement New Illustration LJ 1711 Figure 3 1 Exploded View of DECstation Chassis FRU Replacement 3 7 New Illustration LJ 1710 Figure 3 2 Exploded View of DECstation Main Logic Board and Options 3 8 FRU Replacement 3 2 1 Keyboard Replacement Replace the keyboard as follows 1 2 3 4 Turn power to the system unit and monitor off Disconnect the keyboard cable from the system unit Connect the cable from the new keyboard to the system unit Turn the power on again 3 2 2 Monitor Replacement Replace the monitor as follows 1 2 6 Turn power to the system unit and monitor off Unplug the power cord to the system unit from the aux
27. enerates beep codes on the speaker if the test program detects a fatal error The system uses the beep codes to report test results only until screen initialization and screen retrace verification have occurred After screen initialization and verification the built in diagnostic sends non fatal error messages to video memory and the system displays the messages on the monitor CAUTION Do not connect or disconnect the video cable from the monitor or system when the monitor and or system is on This can cause damage to the system Always turn the monitor and system off then wait 20 seconds and disconnect the power cord before you remove the system unit cover Observe anti static precautions 2 5 1 Power Up Beep Codes During the power up self test the system generates two levels of beep codes The primary level consists of a combination of long and short beeps which indicate possible system malfunction conditions The secondary level utilizes bursts of beeps in a numeric beep code pattern to indicate specific malfunction locations on the main logic board Table 2 2 lists the primary beep codes The primary beep codes indicate a main logic board failure memory failure memory configuration error or a video error If a memory failure is indicated check and reseat the single in line memory modules SIMMs on the OK Memory Adapter If you suspect a bad SIMM first replace one SIMM and then the other 2 8 Troubleshooting Table 2 2 Prim
28. gic board as follows 1 10 11 Remove the cover Section 3 2 4 and open the system unit Section 3 2 5 Remove all option boards and their cables if any Section 3 2 6 Remove the system unit chassis support and bus adapter board Section 3 2 7 Remove all the SIM Ms installed on the main logic board Section 3 2 11 Remove the math coprocessor if one is installed Section 3 2 12 Remove the power supply power on LED floppy hard tape drive interface and IDE interface cables attached to the main logic board Figure 3 14 and Figure 3 15 NOTE When removing the cables note their location and routing Remove six 3 16 inch hex standoffs that secure the serial parallel and monitor connectors to the system unit Figure 3 14 and Figure 3 15 NOTE The connectors are soldered to the main logic board Each connector and main logic board is secured to the system unit by the six standoffs Remove the six screws securing the main logic board to the system unit Figure 3 14 and Figure 3 15 Remove the main logic board Figure 3 14 and Figure 3 15 Set all switches and jumpers on the new main logic board to the same positions as those set on the old main logic board Install all options if any that were removed from the old main logic board onto the new main logic board FRU Replacement 3 27 12 Replace the main logic board by reversing the steps used to remove the board NOTE There is a myl
29. h is set correctly Adjust brightness and contrast controls Turn on the monitor Make sure the monitor cable is installed properly 2 14 Troubleshooting Table 2 5 Cont System Unit Troubleshooting Procedures Problem Possible Cause Corrective Action An Ethernet network adapter is installed but the node does not boot when you try to reboot after using the utilities diskette System does not boot from the hard disk Tape does not work in the tape drive Main logic board failure Using a diskette generated reset is not compatible with the Ethernet board There is no software on the partition System software is not on the hard disk Requested partition does not exist or is not formatted Primary and secondary drives are set incorrectly Hard disk is not installed properly Tape is not fully inserted into the tape drive Tape is worn or damaged Make sure the VGA jumper is enabled on the main logic board If so replace the main logic board Press Ctrl Alt Del at the same time a soft reset to properly reset the hardware then turn system power off and then on Install software on the partition Load the system software on the hard disk Check the partition Format the partition re partition if necessary Make sure the drive jumpers are correctly set Check hard disk installation Make sure the tape is fully inser
30. he cover Section 3 2 4 and open the system unit Section 3 2 5 Remove the battery as follows e On the DECstation 212LP remove the battery by lifting it out of the socket on the main logic board Figure 3 6 e On the DECstation 316sx and DECstation 320sx remove the cable from J 3 on the main logic board Figure 3 7 Remove the battery from the system unit by pulling it off the Velcro mounting strip WARNING Do not dispose of the battery at the customer site Do not burn the battery or take it apart Replace the battery by reversing the steps 3 16 FRU Replacement New Illustration LJ 1706 Figure 3 6 Removing the DECstation 212LP Battery FRU Replacement 3 17 New Illustration LJ 1705 Figure 3 7 Removing the DECstation 316sx 320sx Battery 3 2 10 Reset Button Removal Remove the reset button as follows 1 Remove the cover Section 3 2 4 and open the system unit Section 3 2 5 2 Remove all option boards from the system unit if any Section 3 2 6 3 18 FRU Replacement 3 Disconnect the reset button cable from the main logic board Figure 3 8 4 Depress the option board card guide dip Figure 3 8 Slide the card guide to the left and remove it from the system unit Figure 3 8 6 Fromthe back of the card guide push the reset button and cable forward through the card guide Figure 3 8 Replace the reset button by reversing these steps New Illustration LJ 1704 Figure 3 8 Removing
31. illiary outlet of the DECstation Disconnect the monitor cable from the system unit Connect the cable from the new monitor to the system unit Plug the power cord from the system unit into the auxilliary outlet of the DECstation Turn the power on again 3 2 3 Mouse Replacement Replace the mouse as follows 1 Turn power to the system unit and monitor off CAUTION All power must be off when connecting or disconnecting the mouse or damage to the mouse and or main logic board will result Disconnect the mouse cable from the system unit Connect the cable from the new mouse to the system unit Turn the power on again FRU Replacement 3 9 3 2 4 System Cover Removal Remove the system cover as follows 1 Turn power to the system unit and monitor off CAUTION To avoid damage to the hard disk do not move or perform the following procedure for at least 20 seconds after you turn power to the system off 2 Disconnect all cables from the back of the system unit 3 Remove the two countersunk screws that secure the cover to the chassis of the system unit Figure 3 3 4 Slide the cover forward about three inches to clear the locating pins on the inside of the front bezel and remove the cover Figure 3 3 New Illustration LJ 1709 Figure 3 3 Removing the DECstation System Cover 3 10 FRU Replacement 3 2 5 Opening the System Unit Open the system unit as follows Figure 3 4 1 Using the key unlock the s
32. ing 2 7 Troubleshooting Problems Occurring During System Operation Sometimes problems occur during system operation Use the following list to help isolate a problem to a specific subsystem by determining how or when the problem occurs The problem occurs during diskette drive access e Check the diskette drive and the jumper setting e Lock for slightly loose cables e Check the main logic board jumper settings e f possible run the diagnostics The problem may be with the main logic board decoding resistor pack or faulty loading on the data bus See also Section 2 6 The problem occurs during hard disk drive access e Check the hard disk drive including jumper and switch settings e Check for loose drive cables e Check the SCSI board Make sure it is seated properly and its jumpers are set correctly The problem seems to be video related e Check the main logic board VGA jumper setting The problem seems to be keyboard related e Keyboard lock may be partially engaged e Check the keyboard connection e Run the Diagnose diagnostics The problem may be the keyboard interface on the main logic board The problem is reproducible or intermittent e Expansion options may be competing for interrupt request lines 1 O address range or memory address range Troubleshooting 2 21 The problem seems to be heat related e Make sure there is sufficient air flow around the system e The system unit may be clogged w
33. ing a DECstation 1 Ask the customer to describe the problem You need to find out When the problem started If any new hardware options were added to the system around the time the problem started and if the options are Digital certified or third party If any new software was added to the system 2 Havethe customer supply you with a copy of the operating system diskette s that came with the system 3 Have the customer provide you with the system configuration Type of monitor Type of keyboard Type and number of disk drives Type and amount of memory Type of network adapter Type of mouse Type of disk adapter if on board disk adapter is disabled Type of video graphics adapter if on board VGA is disabled Any other options installed in the system 4 Observethe problem Based on what you observe refer to one of the following procedures If the system does not power up see Section 2 4 2 No Power If the system powers up but will not boot see Section 2 4 3 System Does Not Boot Troubleshooting 2 5 If the system powers up and boots see Section 2 4 4 System Boots 2 4 2 No Power This procedure is to help determine the cause of the problem when the DECstation does not power up Before starting this procedure be sure you have done the steps in Section 2 4 1 1 2 3 Check the system for loose cables and connections Check the 115 230 Vac switch on the back of the system unit Plug the
34. ith dust 2 8 Using the System Utilities Diskette The menu driven System Utilities diskette shipped with the system and required as a Customer Service tool must be used when options are added to the system A language option menu displays first when the System Utilities diskette is booted After a language is selected an option menu displays Selecting Setup from the option menu displays the Setup utility menu The Setup utility must be run anytime the following occur e Theamount of memory in the system is changed e Diskette drives are added or removed e A different video display board is installed in the system e The battery backed up date and time are changed e TheCMOS battery is disconnected or changed NOTE MS DOS and OS 2 users should use the format command present in their operating system Do not use the format command provided on the System Utilities diskette 2 8 1 Running the Setup Program NOTE If you have installed a new SCSI hard disk drive format the drive before you run the Setup utility See your SCSI hard disk installation guide You need the following information when you run the Setup utility e Thetype of diskette drive for drive A and optional drive B e System base memory size displayed on the screen at power Up 2 22 Troubleshooting Expansion memory size displayed on the screen at power up Primary video adapter type VGA CPU and BUS dock speeds CPU speed is the CPU processing
35. lity with these architectures Support for MS DOS requires a defined set of ROM BIOS read only memory basic I O system services which the DECstation offers Ordering Parts Customers who maintain their own equipment can order spare parts by either phone or mail or through any Digital sales office To order parts by phone call 1 800 DIGITAL from 8 30 am to 8 00 pm Eastern Standard Time To order parts by mail send a purchase order to Digital Equipment Corporation P O Box CS2008 Nashua NH 03061 About This Guide ix Related Documentation The following related documents are available as supplements to the information provided in this guide Document Part Number DECstation 212 User s Guide ER PC441 UG DECstation 316sx User s Guide ER PC442 UG DECstation 320sx User s Guide ER PC443 UG DECstation 212 Technical Reference ER PC44Y AA Manual DECstation 316sx Technical Reference ER PC44Y BB Manual DECstation 320sx Technical Reference ER PC44Y CC Manual DECstation Option Installation Guides ER 4XOPS SV Service Kit PCSA Network Troubleshooting Guide AA J U54A TH DEC EtherWORKS Service Guide EK DE21A SV DECconnect System Stand alone EK DECSY TG ThinWire Networks Planning and Installation Guide DECconnect System Planning and EK DECSY CG Configuration Guide DECconnect System Installation and EK DECSY VG Verification Guide Digital personnel may order documents with part numbers beginning with either ER o
36. moving the DECstation 212LP Battery 3 7 Removing the DECstation 316sx 320sx Battery 3 8 Removing the Reset Button 00 0c eee 3 9 Removing and Replacing the 212LP SIMM 3 10 Removing and Replacing the 316sx 320sx SIMM 3 11 Replacing the 212LP Math Coprocessor 3 12 Replacing the 316sx Math Coprocessor 3 13 320sx Math Coprocessor Replacement 3 14 Removing the 212LP Main Logic Board 3 15 Removing the 316sx Main Logic Board 3 16 Removing the 320sx Main Logic Board 3 17 Replacing the Floppy Disk Drive o oocccccco 3 18 Removing the DECstation Power Supply 3 19 212LP Main Logic Board J umper Locations 3 20 316sx Main Logic Board J umper Locations 3 21 DECstation 316sx Main Logic Board Switch Location 3 38 3 40 3 42 vi Contents 3 22 320sx Main Logic Board J umper Locations 3 40 3 23 DECstation 320sx Main Logic Board Switch Location 3 42 Tables 1 1 Base System Configurations a 1 5 152 MONOS A A AAA A eee eos 1 7 1 3 Math COPrOcessoOrS o o o ocoooccco ee 1 10 2 1 Troubleshooting Tools 2 2 2 2 Primary Beep Codes 0 0000 c ces 2 8 2 3 Secondary Beep Codes 0 ees 2 9 2 4 BIOS Error Messages 0 cee eee 2 11 2 5 System Unit Troubleshooting Procedures
37. n you start the system Screen is blank and monitor LED is on Monitor is not turned on Power cord is not connected No power at wall outlet Setup utility was not run Contrast and brightness controls set to minimum Turn on the monitor and then the system Make sure the power cord is connected to the wall outlet Use another outlet Run the Setup utility Use your monitor and adapter board manuals and utilities diskette s Adjust the contrast and brightness controls 2 18 Troubleshooting Table 2 7 Cont Monitor Troubleshooting Procedures Problem Possible Cause Corrective Action Screen goes blank after successful power up monitor LED is off Monitor LED is off but display is OK Monitor is on but no cursor or text displays Main logic board failure Power or monitor failure Faulty LED System is not on Contrast control is set to minimum Main logic board failure Replace the monitor If that doesnt fix the problem make sure the VGA jumper is enabled on the main logic board If it is enabled replace the main logic board Turn the monitor and system off Disconnect the monitor from the system and wall Plug the monitor into an working wall outlet If the monitor LED does not turn on there is a problem with the monitor or monitor LED Replace the monitor Turn on the system Turn up the contrast control Replace the monit
38. nstructions e Chapter 3 contains procedures for removing and replacing field replaceable units For information about network troubleshooting refer to the PCSA Network Troubleshooti ng Guide For additional information about PC architecture and the Digital Ethernet Personal Computer Bus Adapter DEPCA and DEC EtherWORKS option boards refer to the appropriate Service Guides Intended Audience The procedures in this guide are for service technicians trained only by Digital Equipment Corporation vii viii About This Guide Conventions This document uses the following conventions Convention Meaning Warning Provides information to prevent personal injury Caution Provides information to prevent damage to equipment Note Provides general information you should be aware of CtriJAlt Del Press and hold Ctrl while you press both Alt and Dell Control key sequences have special functions Strike the Fl key What the screen displays as a prompt or an instruction is shown in monospaced type Throughout this guide DECstation refers to the DECstation 212P DECstation 316sx and the DECstation 320sx When information applies to a specific DE Cstation the full title is used The computer industry recognizes two open architectures as industry standards the IBM PC AT bus structure and the Microsoft disk operating system MS DOS The term industry standard refers to compatibi
39. nt generates and uses radio frequency energy and if not installed and used properly that is in strict accordance with the manufacturer s instructions may cause interference to radio and television reception It has been type tested and found to comply with the limits for a Class B computing device in accordance with the specifications in Subpart J of Part 15 of FCC Rules which are designed to provide reasonable protection against such interference in a residential installation However there is no guarantee that interference will not occur in a particular installation If this equipment does cause interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient the receiving antenna Move the computer away from the receiver Plug the computer into a different outlet so that computer and receiver are on different branch draits If necessary the user should consult the dealer or an experienced radio television technician for additional suggestions The user may find the following booklet prepared by the Federal Communications Commission helpful How to Identify and Resolve Radio TV Interference Problems This booklet is available from the US Government Printing Office Washington DC 20402 Stock No 004 000 00398 5 The following are trademarks of Digital Equipment Corporation DEC D
40. nternational version 240 Vac 50 Hz with 1024 x 768 resolution North Hemisphere IEC plug PC4XV B7 30 33969 01 SVGA color RGB 14 international version 240 Vac 50 Hz with 1024 x 768 resolution South Hemisphere IEC plug 1 4 6 Enhanced Keyboards There are two different keyboards available as options on the DECstation The 101 key enhanced keyboard and the LK250 keyboard NOTE Keyboards used with the DE Cstation 212LP DE Cstation 316sx and DE Cstation 320sx must be equipped with a 6 pin miniature PS 2 compatible connector 1 4 6 1 101 Key Enhanced Keyboard The 101 key enhanced keyboard provides the industry standard I BM PC AT style key arrangement on a smaller desktop keyboard 1 4 6 2 LK250 Keyboard The LK250 keyboard provides the standard Digital key arrangement available in several country specific language variations 1 10 Overview 1 4 7 Math Coprocessor The math coprocessors listed in Table 1 3 plug into the main logic board and allow each DECstation to process numeric data faster Table 1 3 Math Coprocessors Model Number Description PC44P AA 10 MHz optional Intel 80287 coprocessor for the DE Cstation 212 p PC46P BB 16 MHz optional Intel 80387 coprocessor for the DE Cstation 316sx PC44P CC 16 MHz optional Intel 80387sx coprocessor for the DE Cstation 320sx 2 Troubleshooting This chapter provides troubleshooting instructions for the DECstation systems It is divided into th
41. or If that doesnt fix the problem make sure the VGA jumper is enabled on the main logic board If it is enabled replace the main logic board Troubleshooting 2 19 Table 2 7 Cont Monitor Troubleshooting Procedures Problem Possible Cause Corrective Action Screen display distorted rolling flickering or wrong or uneven color Screen displays distorted images or goes blank when you run the software Screen displays partially highlighted characters You have a color monitor and the display is monochrome Monitor cable connector pins bent or broken Electromagnetic interference exists Software is not configured for or is incompatible with the current settings of the VGA board Main logic board VGA board jumpers incorrectly set System was turned on before turning on the monitor Straighten pins or replace the monitor Move any electromechanical device away from the monitor or move the monitor Reconfigure the software for VGA or set the VGA jumper on the main logic board to a standard supported by your software See Section 3 3 1 and Section 3 3 2 of this manual or the software manual Make sure the VGA jumper is enabled on the main logic board If so replace the main logic board If that doesn t fix the problem replace the monitor Turn off the monitor and system Wait at least 20 seconds Turn on the monitor then the system unit 2 20 Troubleshoot
42. ort IDE drive connector Super VGA controller 1024 x 768 with 512 Kbytes 1 Mbyte system RAM fixed with four SIMM video memory expansion slots and one bus expansion adapter connector The bus expansion adapter plugs into the main logic board and contains three 16 bit also usable as 8 bit expansion slots Overview 1 7 1 4 4 Power Supply The DECstation is supplied with a 100 watt power supply that includes an auxiliary ac power output IEC connector The power supply is switch selectable between either 115 Vac 60 Hz or 230 Vac 50 60 Hz power input 1 4 5 Monitors The DECstation supports both color and monochrome VGA analog monitors The monitors are available in different voltage input variations and video alignments to meet international requirements See Table 2 7 Table 1 2 Monitors Model Number Part Number Description PC4XV AA 30 32317 01 VGA monochromatic 14 for all versions of DECstation personal computers Requires PC4XG AA or AB VGA adapter except on the PC44 models Displays 64 shades of grey 640 x 480 resolution 120 Vac 60 Hz US and Canada PC4XV A2 30 32317 01 VGA monochromatic 14 international version 120 Vac 60 Hz with 640 x 480 resolution North Hemisphere IEC plug PC4XV A3 30 32319 01 VGA monochromatic 14 international version 240 Vac 50 Hz with 640 x 480 resolution North Hemisphere IEC plug PC4XV A4 30 32320 01 VGA monochromatic 14 international version 240 Vac 50 Hz
43. r EK from Digital Equipment Corporation 444 Whitney Street Northboro MA 01532 Attn Publishing and Circulation Services NRO2 2 Order Processing Section On line orders can be sent ALL IN 1 mail to Order NRO or VMS mail to NEST ORDER x About This Guide Digital personnel may order documents with part numbers beginning with AA from Digital Equipment Corporation Digital Drive Westminster MA 01473 0471 Attn Attention Order Administration Digital self maintenance customers may order documents with part numbers beginning with either EK ER or AA by mail or phone from Digital Equipment Corporation Peripherals and Supplies Group P O Box CS2008 Nashua NH 03061 Or by phone between 8 30am and 8 00pm Eastern Standard Time call 1 800 DI GITAL 3 Overview 1 1 Introduction The DECstation Figure 1 1 is a desktop computer It can be used as a standalone personal computer or as a node on a network to a VAX computer or another DECstation with network server software The DECstation runs Digital and other industry standard applications LJ 1713 Figure 1 1 DECstation Personal Computer 1 2 Overview As a node on a Personal Computing System Architecture PCSA network the DECstation is the user s interface with the applications and services that the PCSA family of products provides As part of a network the DECstation communicates with other computers on the network and shares the various resources
44. r the numeric beep code pattern This pattern establishes the secondary level of beep codes Table 2 3 lists the secondary beep codes and the test in progress or test failure that corresponds to the numeric beep code pattern For example 2 1 4 a burst of two beeps a single beep and a burst of four beeps indicates that a failure of bit 3 in the first 64K of RAM has been detected Table 2 3 Secondary Beep Codes Beep Code Description of Test or Failure 1 1 3 CMOS write read test in progress or failure 1 1 4 BIOS ROM checksum test in progress or failure 1 2 1 Programmable Interval Timer test in progress or failure 1 2 2 DMA initialization test in progress or failure 1 2 3 DMA page register write read test failure 1 3 1 RAM refresh verification test in progress or failure 1 3 3 1st 64K RAM chip of data line failure multi bit 1 3 4 1st 64K RAM odd even logic failure 1 4 1 1st 64K RAM address line failure 1 4 2 1st 64K parity test in progress or failure 2 1 1 1st 64K RAM chip or data line failure bit 0 2 1 2 1st 64K RAM chip or data line failure bit 1 2 1 3 1st 64K RAM chip or data line failure bit 2 2 1 4 1st 64K RAM chip or data line failure bit 4 2 2 1 1st 64K RAM chip or data line failure bit 4 2 2 2 1st 64K RAM chip or data line failure bit 5 2 2 3 1st 64K RAM chip or data line failure bit 6 lAny of the RAM failures can be caused by a SIMM not being properly seated in its socket 2 10 Trouble
45. ridge 1 4 QIC 40 30 01 IDE hard disk drive 20 M byte 3 5 30 32375 01 IDE hard disk drive 40 M byte 3 5 30 32345 01 3 3 3 4 FRU Replacement Table 3 2 Cont DECstation Optional Field Replaceable Units Digital Part FRU Number IDE hard disk drive 105 M byte 3 5 30 34429 01 IDE hard disk drive 120 M byte 3 5 30 32344 01 IDE dual drive ribbon cable assembly 29 27912 01 2400 BPS integral modem 30 31072 01 1200 BPS integral modem 30 31073 01 10 MHz Intel 80287 math coprocessor 19 30951 01 16 MHz Intel 80387sx math coprocessor 19 30973 01 20 MHz Intel 80387sx math coprocessor 19 01 8514 A Compatible graphics adapter 20 34173 01 8514 A Compatible graphics adapter utilities diskette 29 28680 01 8514 A Compatible VGS ribbon cable 29 28680 01 01 Keyboard 101 key enhanced MD 29 32503 01 Two Button mouse PS 2 Type Microsoft compatible 30 25322 01 DEPCA adapter 70 24252 01 DEPCA Turbo 115 Vac system box power cord 70 22837 01 or 02 17 02607 01 FRU Replacement 3 5 3 1 1 Before Replacing FRUs The following criteria apply when removing or installing DECstation FRUs CAUTION After you turn power to the system off do not disconnect the power cord from the system unit or wall outlet for at least 20 seconds e Always turn power to the system and monitor off and disconnect all external cables before removing any FRU NOTE Before disconnecting the DECstation from a network inform the syst
46. scription PC441 AA DECstation 2121p 80286 12 MHz base system box 1 M byte minimum SIMM RAM 3 5 inch 1 44 Mbyte floppy diskette drive on board IDE device interface serial parallel port mouse and keyboard port on board VGA 3 PC AT expansion slots full size 2 additional front panel storage bays 3 5 and 5 25 inch with the power supply factory set at 120 Vac 60 Hz PC441 A2 Same as PC441 AA but with no power cord and keyboard PC441 A3 Same as PC441 A2 but with no power cord and keyboard and is factory set at 240 Vac 50 Hz PC442 A2 DECstation 316sx 80386 16 MHz base system box 1 M byte minimum SIMM RAM 3 5 inch 1 44 M byte floppy diskette drive on board IDE device interface serial parallel port mouse and keyboard port 3 PC AT expansion slots full size 2 additional front panel storage bays 3 5 and 5 25 inch with the power supply factory set at 120 Vac 60 Hz No power cord or keyboard PC442 A3 Same as PC442 A2 but with the power supply factory set at 240 Vac 50 Hz PC443 A2 DECstation 320sx 80386 16 MHz base system box 1 M byte minimum SIMM RAM 3 5 inch 1 44 M byte floppy diskette drive on board IDE device interface serial parallel port mouse and keyboard port on board SVGA 3 PC AT expansion slots full size 2 additional front panel storage bays 3 5 and 5 25 inch with the power supply factory set at 120 Vac 60 Hz No power cord or keyboard 1 6 Overview Table 1 1 Cont Bas
47. sed 5 Ground 6 Red return ground 7 Green return ground 8 Blue return ground 9 Key no pin 10 Sync return ground 11 Monitor ID bit O not used 12 Monitor 1D bit 1 not used 13 Horizontal sync 14 Vertical Sync 15 Not used NOTE The monitor type color or monochrome is determined when power to the system is turned on NOTE Monochrome monitors use the green video for all video input and ignore the red and blue video NOTE A monochrome monitor does not use the monitor ID bits
48. shooting Table 2 3 Cont Secondary Beep Codes Beep Code Description of Test or Failure 2 2 4 2 3 1 2 3 2 2 3 3 2 3 4 2 4 1 2 4 2 2 4 3 2 4 4 3 1 1 3 1 2 3 1 3 3 1 4 3 2 4 3 3 4 3 4 1 3 4 2 1st 64K RAM 1st 64K RAM 1st 64K RAM 1st 64K RAM 1st 64K RAM 1st 64K RAM 1st 64K RAM 1st 64K RAM 1st 64K RAM chip or data line failure bit 7 chip or data line failure bit 8 chip or data line failure bit 9 chip or data line failure bit A chip or data line failure bit B chip or data line failure bit C chip or data line failure bit D chip or data line failure bit E chip or data line failure bit F Slave DMA register test in progress or failure Master DMA register test in progress or failure Master interrupt mask register test in progress or failure Slave interrupt mask register test in progress or failure Keyboard controller test in progress or failure Screen memory test in progress or failure Screen initialization test in progress or failure Screen retraces tests in progress or failure 2Test failures from this point on can usually be attributed to the VGA adapter or the slot connector Try moving the adapter to a different slot Troubleshooting 2 11 2 5 2 Test Messages After screen initialization and verification the built in diagnostics send non fatal error messages to video memory and the system displays the messages on the monitor Table 2 4 lists the BI
49. speed and BUS speed is the O expansion bus transmission speed The Setup utility is run as follows 1 2 Turn power to the monitor on Insert the Utilities diskette in the drive and turn power to the system on The power up tests run then the monitor displays a language selection menu Select a language then press Enter The monitor displays an option menu Select option 4 SETUP then press Enter The monitor displays the Setup utility menu Follow the instructions on the bottom of the screen and select the correct system configuration then press F2 to save and exit the menu NOTE Use the keyboard arrow keys to select a configuration in the Setup utility menu do not use the keypad arrow keys Reboot the system using one of the following methods e Press the Ctrl Alt Del keys simultaneously preferred method e Press the Reset button on the front of the system unit When the system displays the copyright page the setup procedure is complete NOTE If the hard disk is not formatted a hard disk failure message might display on the copyright screen 3 FRU Replacement 3 1 Introduction This chapter contains procedures for removing and replacing each DECstation field replaceable unit FRU To install many of the FRUs perform the reverse of the procedure when so noted Only qualified service technicians should remove and replace FRUs Use
50. system unit and monitor power cord into a working ac outlet Turn on power to the monitor and system unit Check for system power The following are indications that the system and monitor have powered up Power indicators on the system unit and monitor are on You can hear the fan running You can hear the hard disk spinning If the system does not power up a b C Turn off power to the system unit and monitor Unplug the system and monitor from the ac outlet Disconnect power to all the hard disk drives and remove all options Plug the monitor and system into a working ac outlet Turn the monitor and system power on If the system powers up there was either a faulty device too many options installed or another power related problem Try booti ng the system from the operating system startup diskette Replace the Digital certified options one at a time and see if the system powers up each time an option is replaced or a disk drive is reconnected 2 6 Troubleshooting 6 If the system powers up and does not boot refer to Section 2 4 3 7 If the system powers up and boots refer to Section 2 4 4 2 4 3 System Does Not Boot This procedure is to help determine why the DECstation does not boot Before starting this procedure be sure you have done the steps in Section 2 4 1 1 Remove any third party options and try to reboot the system If the system generates any beep codes refer to Section 2 5
51. ted and the cartridge release handle is locked down Try another tape Troubleshooting 2 15 Table 2 5 Cont System Unit Troubleshooting Procedures Problem Possible Cause Corrective Action System does not boot from the diskette drive System does not reboot when the power is turned off and on Diskette is not in the diskette drive Drive switch is set incorrectly Diskette is not bootable Diskette is worn or damaged Hardware conflict remote boot Power was not off long enough Insert a diskette containing bootable system software Make sure the drive switch is set correctly Use a diskette containing bootable system software Try another diskette Make sure system is not set for remote boot Turn the power off for at least 20 seconds before rebooting 2 16 Troubleshooting 2 6 2 Disk Related Problems Table 2 6 lists some common disk related problems possible causes and suggested corrective actions If the corrective action does not work run the Diagnose diagnostics to further isolate the problem and then replace the failing FRU Table 2 6 Hard Disk and Diskette Drive Troubleshooting Procedures Problem Possible Cause Corrective Action Hard disk cannot read or write information Intermittent hard disk read write problems Hard disk works but produces extra characters or garbled text System won t start from the diskette drive or
52. tem Power Consumption 12 12 DC 45 Volts Volts Volts 12 Peak Power Current Amps Amps Amps Amps VA Available 12 80 0 300 2 700 5 00 current Current 2 70 0 024 0 030 required Reserve 10 10 0 280 2 670 5 00 current Power 13 50 0 120 0 150 13 77 consumed Power 86 23 available Peripheral Interface The following tables list the pin assignments and function of each peripheral interface connector on the rear panel of the DECstation systems Table B 1 Parallel I O Port Connector Pin Number Function 1 Strobe 2 Data bit 0 3 Data bit 1 4 Data bit 2 5 Data bit 3 6 Data bit 4 7 Data bit 5 8 Data bit 6 9 Data bit 7 10 Acknowledge 11 Busy 12 Paper end 13 Select 14 Auto feed 15 Error 16 Initialize B 1 B 2 Peripheral Interface Table B 1 Cont Parallel I O Port Connector Pin Number Function 17 Select in 18 to 25 Ground Table B 2 RS 232C Serial Port Connector Pin Number Function Carrier detect Receive data Transmit data Data terminal ready Signal ground Data set ready Request to send Clear to send O AN AD Ui bb qu N H Ring indicator Table B 3 Keyboard and Mouse Connectors Pin Number Function Data Reserved Ground 5 Vdc Clock Reserved xm Ul A WN H Peripheral Interface B 3 Table B 4 Video Port Connector Pin Number Function 1 Red video 2 Green video 3 Blue video 4 Monitor 1D bit 2 not u
53. the Reset Button FRU Replacement 3 19 3 2 11 Single In Line Memory Module Replacement Replace the Single In Line Memory Modules SIM Ms as follows 1 Remove the cover Section 3 2 4 and open the system unit Section 3 2 5 2 Remove any option boards that might obstruct the removal and installation of SIMMs 3 Use both hands and spread the retaining clips that hold the SIMM in place Figure 3 9 and Figure 3 10 4 Movethe SIMM forward to the vertical position Figure 3 9 and Figure 3 10 5 Use your index fingers to pull the SIMM away from the retaining brackets Figure 3 9 and Figure 3 10 and remove the SIMM 6 Grasp the SIMM at both ends and insert it into the socket Figure 3 9 and Figure 3 10 and replace the SIMM Make sure the SIMM is fully seated in the connector 7 Press backward and down on the SIMM to lock it into place NOTE The number of chips on the SIMM modules may vary based on the vendor 3 20 FRU Replacement Insert version LJ 1703 Figure 3 9 Removing and Replacing the 212LP SIMM FRU Replacement 3 21 Insert version LJ 1784 Figure 3 10 Removing and Replacing the 316sx 320sx SIMM 3 22 FRU Replacement 3 2 12 Math Coprocessor Replacement Replace the math coprocessor as follows 1 2 Remove the cover Section 3 2 4 and open the system unit Section 3 2 5 Locate the math coprocessor on the main logic board Figure 3 11 and Figure 3 12 Remove the math coprocessor as
54. untry specific PS 2 compatible mouse Power cord country specific 16 bit SCSI host adapter Serial parallel adapter 1200 300 internal baud modem 2400 internal baud modem 10 MHz Intel 80287 math coprocessor DE Cstation 212LP 16 MHz Intel 80387sx math coprocessor DE Cstation 316sx 20 MHz Intel 80387sx math coprocessor DE Cstation 320sx DEC EtherWORKS bus adapter NOTE Options listed were available at the time of printing Additional options may be available at this time 1 4 Overview 1 3 1 System Unit Layout Figure 1 2 shows the location of both standard and optional equipment within the system unit Standard equipment the equipment that is induded in the base system is represented by solid lines Optional equipment is represented by dotted lines LJ 1712 Figure 1 2 System Unit Layout 1 4 DECstation System Configurations The DECstation personal computers are each available in two base system configurations 115 or 230 Vac These systems are available for customers who elect to purchase DE Cstation supported options separately and configure their own systems Overview 1 5 Additionally customers can order one of several packaged systems which offer optional system memory configurations mass storage devices and video adapters installed at the factory The base system configurations are listed in Table 1 1 The packaged systems are listed in Table 1 2 Table 1 1 Base System Configurations Model Number De
55. ystem box 2 Remove the two shake proof fittings that secure the system unit option cover and carriage metal fold outs Lift the option cover left side counter clockwise and remove 4 Lift the carriage right side clockwise FRU Replacement 3 11 New Illustration LJ 1708 Figure 3 4 Opening the DECstation System Unit 3 12 FRU Replacement 3 2 6 Option Board Replacement The procedure for replacing an option board in the DECstation is similar for the different options in the system 1 Remove the cover Section 3 2 4 and open the system unit Section 3 2 5 Note the position of all cables if any connected to the option board and disconnect them NOTE When removing an option board note it s location and the location and routing of all cables if any attached to the option board Remove the mounting screw that secures the option board to the chassis Remove the board by sliding it to the left and out of the expansion slot connector Configure the jumpers and switches on the new board to match those on the old board Install the new board in the slot from which the old board was removed Make sure the board is firmly seated in the connector s on the bus adapter board Secure the board to the chassis with the mounting screw Reconnect any cables you removed FRU Replacement 3 13 3 2 7 Option Slot Printed Circuit Board Replacement Remove the option slot printed circuit board PCB as follows
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