Service Manual ()
Contents
1. Runs selected tests from all test groups to quickly locate a failure or to indicate where further testing is needed to isolate a failure e Run All Tests Runs all tests for a thorough test of the system e Run Specific Tests Tests a particular area or subsystem 2 6 Dell Dimension XPS M166s M200s and M233s Systems Service Manual Getting Help If none of the troubleshooting procedures in this chapter or the tests in the diskette based diagnostics reveals the source of the problem or leads to the proper troubleshooting steps for determining the source of the problem call Dell for technical assistance For instructions see Contacting Dell in the online System User s Guide or the chapter titled Getting Help in the Diagnostics and Troubleshooting Guide Basic Troubleshooting 2 7 2 8 Dell Dimension KPS M166s M200s and M233s Systems Service Manual Codes and Error Messages This chapter describes beep codes and system error messages that can occur during system start up or in the case of some failures during normal system operation In some cases the system may display error messages and emit beep codes simultaneously In other cases such as when a video problem occurs the system may emit a beep code even though it cannot display an error message If a faulty system does not emit beep codes or display system error messages to indicate a failure run the appropriate tests in the diskette based diagnostics to help2. T technical specifications 1 18 troubleshooting boot routine 2 3 external visual inspection 2 2 initial procedures 2 1 internal visual inspection 2 4 Index 3 4 Dell Dimension XPS M166s M200s and M233s Systems Service Manual
3. T mm _ t 0 reset button z Figure 1 4 Mini Tower Computer Front Panel Features 1 4 Dell Dimension XPS M166s M200s and M233s Systems Service Manual cooling fan power supply secondary hard disk system board drive bracket filler brackets drive cage drive bays typical card guide assembly and 3 5 inch diskette primary hard disk drive drive power button eet button hard disk drive bant Basal access indicator Figure 1 5 Internal View of the Mini Tower Computer parallel port connector MIDI game port connector video connector voltage selection switch AC power receptacle G G microphone port connector serial port mouse connector connector line in port connector keyboard connector USB connectors 2 line out port connector Figure 1 6 Desktop and Mini Tower Computer Back Panel Features System Overview 1 5 1 6 CAUTION To avoid possible data or file structure corruptions the reset button should only be used when the system cannot be rebooted by pressing lt Ctrl gt lt Alt gt lt Delete gt Before you use the reset button to initiate a hardware reset close any open application programs and files if possible CAUTION Ensure that all expansion card slots have either a card mounting bracket or a metal filler bracket installed Omitting these brackets can disturb the normal airflow in the computer resulting in possible damage to system com
4. 1 17 drive cage removal 4 5 drives 3 5 inch diskette drive removal 4 9 5 25 inch drive removal 4 6 lower 3 5 inch drive removal 4 8 primary hard disk drive removal 4 10 secondary hard disk drive removal 4 11 upper 3 5 inch drive removal 4 7 E EIDE subsystem 1 6 error messages list of 3 3 expansion card guide removal 4 16 expansion cards removal 4 15 external visual inspection 2 2 Index 1 F messages error 3 3 microprocessor heat sink assembly fan removal 4 14 removal 4 21 front bezel removal 4 3 front panel features desktop 1 3 P mini tower 1 4 PCI expansion card connectors 1 6 POST beep codes 3 1 front panel insert removal 4 4 power supply H about 1 8 DC power distribution 1 9 hard disk drives 1 7 removal 4 13 primary drive removal 4 10 voltage ranges 1 8 secondary drive removal 4 11 power switch removal 4 17 help getting 2 7 R resource conflicts eliminating 2 6 l interrupt assignments 1 16 ISA expansion card connectors 1 6 S J system battery removal 4 23 system board jumpers 1 14 components 1 13 hooked standoffs 4 25 jumpers 1 14 K mounting bracket 4 26 removal 4 24 key combinations A 1 system board jumper locations 1 14 system error messages 3 3 system power supply removal 4 13 M main memory 1 13 system setup program A 1 math coprocessor 1 2 2 Dell Dimension XPS M166s M200s and M233s Systems Service Manual
5. ensure a firm connection 4 Verify that any devices attached to the serial port USB connectors audio jacks MIDI game port and parallel port connectors are properly connected Each of the interface cables must be firmly attached to an appropriate con nector on the back of the computer as well as to the interface connector on the device The captive screws that secure these connectors at each end of the interface cable must be secure enough to ensure a firm connection 5 Verify that the video interface cable is firmly attached to the video con nector on the video expansion card and to the connector on the back of the monitor For proper connection of the video cable see the documentation for the monitor 6 Inspect all external monitor controls for any obvious damage or improper settings For proper settings of the monitor controls see the documentation for the monitor 7 Inspect the keyboard to ensure that no keys are sticking If one or more keys are sticking it may be necessary to replace the keyboard Dell Dimension XPS M166s M200s and M233s Systems Service Manual 8 Inspect the exterior of the computer all controls and indicators and all user accessible data storage devices for any signs of physical damage Does the inspection reveal any problems Yes Refer to the appropriate procedure in Chapter 4 Removing and Replacing Parts No Proceed to the next section Observing the Boot Routine Obs
6. lay it flat on the work surface Loosen the cover mounting thumbscrew that secures the cover to the back of the computer NOTE The thumbscrew is captive and should be retained in the cover when loosened As you face the front of the chassis press the left cover release latch see Figure 4 1 with your left hand and grip the back lip of the cover near the latch with your right hand Pry the cover away from the back left corner of the computer with your right hand while pushing back with your left hand Then press the right cover release latch with your right hand while using your left hand to pry the cover lip away from the back right cor ner of the computer Slide the loosened cover back about half an inch and then lift the cover straight up to remove it from the computer Dell Dimension XPS M166s M200s and M233s Systems Service Manual Front Bezel front bezel N gt X 22 2 Z J A tabs 3 Z NA Figure 4 2 Front Bezel Removal Mini Tower Chassis tabs 3 1 front bezel Figure 4 3 Front Bezel Removal Desktop Chassis Europe Only To remove the front bezel follow these steps 1 Press the three tabs along the edge of the front bezel 2 Rotate the front bezel away from the chassis and disengage the retain ing hooks Removing and Replacing Parts 4 3 4 4 Dri ves The following subsections explain how to remove the drive cage front panel inserts and the vario
7. mini tower For best results any installed hard disk drives should be connected to the pri mary EIDE interface and any other EIDE devices should be connected to the secondary EIDE interface System Overview 1 7 1 8 System Unit The following subsections provide service related information about the system unit Power Supply The 200 W power supply can operate from an AC power source of 115 VAC at 60 Hz or 230 VAC at 50 Hz The power supply provides the DC operating volt ages and currents listed in Table 1 1 NOTE The power supply produces DC voltages only under its loaded condi tion The DC power cable connectors must be connected to their corresponding power input connectors on the system board or drives in order to measure these voltages Table 1 1 DC Voltage Ranges Maximum Voltage Range Output Current 13 3 VDC 3 14 to 43 47 VDC 14 00 A 5 VDC 4 90 to 5 25 VDC 22 00 A 5 VDC 4 50 to 5 50 VDC 0 300 A 12 VDC 11 40 to 12 60 VDC 6 00 A 12 VDC 10 80 to 13 20 VDC 0 300 A 5 VSB 4 75 to 5 25 VDC 0 010 A 1 The 43 3 VDC and 5 VDC outputs are limited to a maximum combined power of 140 W The 12 VDC output line can withstand surges of up to 11 0 A to support disk start up operations The 5 VSB volts standby is sometimes called flea power Dell Dimension XPS M166s M200s and M233s Systems Service Manual DC Power Distribution Figures 1 7 through 1 10 provide the
8. the procedures in this chapter assumes the following The computer cover has already been removed A part can be replaced by performing the removal procedure in reverse order Precautionary Measures Before performing any of the procedures in this chapter read the following warning WARNING FOR YOUR PERSONAL SAFETY AND PROTECTION OF THE EQUIPMENT Before you start to work on the system perform the following steps in the sequence listed 1 Turn off the computer and any attached peripherals 2 Disconnect the computer and any attached peripherals from their power sources to reduce the potential for personal injury 3 Disconnect any telephone or telecommunications lines from the computer 4 Wear a wrist grounding strap and clip it to an unpainted metal sur face such as the padlock ring on the back of the chassis If a wrist grounding strap is not available touch an unpainted metal surface on the back of the computer to discharge any static charge from your body Removing and Replacing Parts 4 1 4 2 Computer Cover cover mounting thumbscrew he cover release latches 2 C chassis foot Figure 4 1 Computer Cover Removal To remove the computer cover from a desktop or mini tower system follow these steps 1 If you are working on a mini tower computer lay the computer on its right side with the chassis foot off the edge of the work surface If work ing on a desktop computer
9. 4 18 each have two latches securing them to the system board Press the latch on each end of the cable connector and pull to release the cable from the system board Determine how the system board is mounted in the computer see Fig ures 4 25 and 4 26 If the system board is secured by five screws proceed to step 6 If the system board is secured by hooked standoffs skip to step 8 Remove the five screws that secure the system board to the computer see Figure 4 25 4 24 Dell Dimension XPS M166s M200s and M233s Systems Service Manual screws 5 Figure 4 25 System Board Mountings Five Screws 7 Carefully lift the system board out from the 1 0 gasket see Figure 4 24 and remove the board from the computer Then skip to step 11 8 If the system board is secured with hooked standoffs see Figures 4 26 and 4 27 remove the mounting screw from the back of the computer mounting screw see o hooked standoffs 5 plastic standoff system board mounting bracket Figure 4 26 System Board Mountings Hooked Standoffs Removing and Replacing Parts 4 25 back of computer system board mounting mounting bracket Screw Figure 4 27 Mounting Screw and Bracket Systems With Hooked Standoffs 9 Grasp the two front corners of the system board and lift the board slightly to free it from the plastic standoff see Figur
10. Oana 5 is dsl em UE oil Pe a AILES oe tl AA 1 13 Main Memory KR 0 R R RR R Ka K RR tee NR tiraia REEL 1 13 System Board Jumpers 1 14 Interrupt Assignments 1 16 DMA Channel Assignments 1 17 Technical Specifications 1 18 Chapter 2 Basic Troubleshooting 2 1 Initial User Contact EA De a E AAA ARR EA 2 1 External Visual Inspection 2 2 Observing the Boot Routine 2 3 Internal Visual Inspection 2 4 Eliminating Resource Conflicts 2 6 Running the Diskette Based Diagnostics 2 6 Getting Help aeter oL Se ud s ek dol Lua eth WA MNA 2 7 Vi Chapter 3 Beep Codes and Error Messages 3 1 POST Bee Codes iis terer Sex VERS Sx EM NNN MEME dex 3 1 System Error Mai sore Loc RI ud c SL LU E ete 3 3 Chapter 4 Removing and Replacing Parts 4 1 Precautionary Measures 4 1 Computer Cover sabs pari pev GE S EA RE R R R R ee RT p R 4 2 Front Bezel ayie aree Het ae AA ea AUA AA 4 3 DEE WA AU e AA D OIM AA WA IA 4 4 Front Panel UAE E EXE dA 4 4 Drive Cages ose Psd bye EO aque e Ra TRR DE pue AR qe 4 5 3 2 Ss Ine DEVE e estes ar abest
11. Slide the secondary hard disk drive assembly toward the back of the chassis and lift it out Removing and Replacing Parts 4 11 5 To remove the secondary hard disk drive from the drive bracket remove the screw from the side of the hard disk drive and then pivot the bracket away from the drive screw secondary hard disk drive ee drive bracket tabs Figure 4 12 Secondary Hard Disk Drive Removal When you insert the replacement hard disk drive into the drive bracket be sure the two tabs on the bracket fit into the mounting holes on the side of the drive When you replace a hard disk drive be sure to set the jumpers on the replace ment drive the same as the jumpers on the drive you removed For additional information about jumper settings on EIDE drives see EIDE Subsystem in Chapter 1 4 12 Dell Dimension XPS M166s M200s and M233s Systems Service Manual Power Supply power supply mounting screws 2 power supply Figure 4 13 Power Supply Removal To remove the power supply follow these steps 1 Disconnect the AC power cable at the power supply 2 Disconnect the DC power cables from the system board see Figure 4 18 3 Disconnect the DC power cables from all the drives 4 Remove the two power supply mounting screws from the back of the chassis and a third mounting screw inside the chassis 5 Lift the power supply out of the chassis Remo
12. XPS M166s M200s and M233s systems include the following new and or advanced features Intel Pentium microprocessor with MMX technology specifically designed to handle complex multimedia and communications software External cache with 512 KB of single bank pipelined burst SRAM Math coprocessor functionality internal to the Pentium microprocessor An ISA and PCI expansion subsystem connected to the PCI bus Full Plug and Play capability Two high performance EIDE interfaces that each support up to two devices for a total of four EIDE devices Of these four EIDE devices up to two can be 1 inch high internal EIDE hard disk drives Memory that can be expanded up to 64 MB using SDRAM DIMMs SDRAM DIMMs are available in capacities of 16 and 32 MB A high speed high resolution PCI video controller card installed in an expansion card slot rather than an integrated video controller to provide video flexibility for customers Support for SCSI hard disk drives tape drives and CD ROM drives when a SCSI controller is installed in an expansion card slot An integrated high performance serial port An integrated bidirectional parallel port Two USB ports which can simplify connecting peripheral devices A 16 bit integrated audio controller that provides sound functions found on the Sound Blaster Vibra 16 expansion card A MIDI game port for connecting a MIDI device joystick game pad or other game input device Most of these featu
13. carefully press down on the ejector tabs at each end of the DIMM socket To replace a DIMM position it in its socket as shown in Figure 4 20 Carefully press one end of the DIMM and then the other into the socket until the DIMM is completely seated Secure the DIMM by snapping the ejector tabs over each end of the DIMM CAUTION Pressing on the center of the DIMM may damage the DIMM back of computer ejector tabs 2 notches Figure 4 20 DIMM Replacement Removing and Replacing Parts 4 19 Cache Card cache memory card 5 WN ae socket Figure 4 21 Cache Card Removal To remove the cache card rock the cache card from side to side while pulling up on it When you replace the cache card be sure that the pin 1 end of the cache card which has a etched near the connector faces the back of the system board NOTE The cache card connector is available only on early versions of the sys tem board Later versions of the system board have the cache memory chips soldered directly on the system board 4 20 Dell Dimension XPS M166s M200s and M233s Systems Service Manual Microprocessor Heat Sink Assembly microprocessor securing clip hooks over tabs on h socket front and back press nere microprocessor socket release lever Figure 4 22 Microprocessor Heat Sink Assembly Removal To remove the microprocessor heat sink assembly follow these steps WARNING The microprocessor chi
14. the system power supply If the troubleshooting procedure indicates that the system power supply is operational troubleshoot the memory subsystem Basic Troubleshooting 2 3 4 During the boot routine observe the system for any of the following e Diskette drive and hard disk drive access indicators These indicators light up in response to data being transferred to or from the drives If either of these indicators fails to light up during the boot routine troubleshoot the diskette drive or hard disk drive subsystem as appropriate Beep codes A beep code is a series of beeps that indicates an error condition If the system emits a beep code see Table 3 1 NOTE The system beeps once during the boot routine This single beep is normal and is not a beep code e System error messages These messages can indicate problems or provide status information If a system error message is displayed see Table 3 2 5 Observe the monitor screen for the Diagnostics Menu Does the Diagnostics Menu appear Yes See Running the Diskette Based Diagnostics found later in this chapter No Proceed to step 6 6 Insert another copy of the diagnostics diskette into the diskette drive and reboot the system Does the Diagnostics Menu appear Yes See Running the Diskette Based Diagnostics found later in this chapter No Proceed to the next section Internal Visual Inspection Internal Visual Inspection CAUTION Before yo
15. value in a field enter a number or use the left or right arrow key icroprocessor External Cache System Memory Service Tag Pentium 200 with MMX TM 512 KB PB 32768 KB SD XXXXX Time 13 17 02 Date Mon Nov 04 1996 Diskette Drive A 3 5 inch 1 44 MB Diskette Drive B Not Installed Drives Primary Type Cyls Hds Pre LZ Sec Size Drive 0 Auto 2099 16 63 1083 Drive 1 None Secondary Drive 0 Auto FX120T Drive 1 None Base Memory 640 KB Extended Memory 31360 KB Reserved Memory None CPU Speed 200 MHz um Lock On Tab Shift Tab change fields lt change values Alt P next Esc exit Alt B reboot Page 2 o 2 Dell Computer Corporation System XPS M200s Setup BIOS Version AXX Keyboard Errors System Password Password Status Setup Password Boot Sequence Report Not Enabled Unlocked Not Enabled Diskette First This category det rmines whether keyboard related rror messages ar reported at system startup Power Management Disabled Video Power Down Disabled Integrated Devices Sound On Serial Port Auto icroprocessor Pentium 200 Parallel Port 378h with MM TM Parallel Mode AT External Cache 512 KB PB Hard Disk Auto System Memory 32768 KB SD Diskette Auto Service Tag XXXXX Speaker On USB On Tab Shift Tab change fields lt gt change values Al
16. 00 nn P 1 2 3 4 5 6 L 48 8 VDC orange 3 3 VDC orange 3 3 VDC orange common black common black common black Figure 1 10 DC Power Connectors P2 P3 P4 P5 P6 and P7 1 12 Dell Dimension XPS M166s M200s and M233s Systems Service Manual System Board The subsections that follow provide service related information about system board components NOTE The cache card connector COAST appears only on early versions of the system board Later versions have the cache memory chips soldered directly on the system board keyboard microprocessor cache card socket power input microprocessor fan connector socket U3L1 COAST connector connector J7M1 KEYBD POWER mouse connector MSE battery socket BH9L1 3 3 V power input connector 3 3V USB connectors USBO and USB1 Z 1205 primary EIDE channel connector PRI IDE serial port connector COM1 parallel port diskette drive interface connector connector FLOPPY PARALLEL integrated audio secondary EIDE channel controller jacks connector SEC IDE E e s E DIMM sockets K BANKO and BANKT below MIDI game port control panel GAME above connector J9E1 CD ROM drive audio cable connector CD SCSI hard disk drive access indicator cable connector HDLED cable attaches to pins 1 4 on header wave table expansion card connector WAVE I
17. 11 Figure 4 12 Figure 4 13 Figure 4 14 Figure 4 15 Figure 4 16 Figure 4 17 Figure 4 18 Figure 4 19 Figure 4 20 Figure 4 21 Figure 4 22 Figure 4 23 Figure 4 24 Figure 4 25 Computer Orientation 1 3 Desktop Computer Front Panel Features Europe Only 1 3 Internal View of the Desktop Computer 1 4 Mini Tower Computer Front Panel Features 1 4 Internal View of the Mini Tower Computer 1 5 Desktop and Mini Tower Computer Back Panel Features 1 5 DC Power Cables woes e ay 4x eed ee tenes ek es 1 9 DC Power Distribution 1 10 DC Power Connector P1 1 11 DC Power Connectors P2 P3 P4 P5 P6 and P7 1 12 System Board Features 1 13 System Board Jumpers 1 14 Computer Cover Removal 4 2 Front Bezel Removal Mini Tower Chassis 4 3 Front Bezel Removal Desktop Chassis Europe Only 4 3 Front Panel Insert Removal 4 4 Drive Cage Removal 4 5 5 25 Inch Drive Removal 4 6 Upper 3 5 Inch Drive Removal 4 7 Lower 3 5 Inch Drive Removal 4 8 3 5 Inch Diskette Drive Removal 4 9 Primary Hard Disk Drive Removal 4 10 Seco
18. 32 MB SDRAM Minimum RAM 32 MB Maximum RAM 64 MB SDRAM External cache BIOS addresses 512 KB single bank pipelined burst SRAM F0000h FFFFFh Ports Externally accessible Serial DTE Parallel bidirectional PS 2 style keyboard PS 2 compatible mouse MIDI game Line in input Line out output Microphone Internally accessible Primary EIDE Secondary EIDE Diskette drive Wave table expansion 9 pin connector 25 hole connector 6 pin mini DIN connector 6 pin mini DIN connector two USB compliant connectors 15 pin connector miniature jack miniature jack miniature jack 15 hole connector on video card 40 pin connector 40 pin connector 34 pin connector Dart gd hee oido 8 pin connector Video Videotype PCI video card in an expansion card slot see manufacturer s specifications System Overview Table 1 5 Technical Specifications continued Drive Bays Externally accessible bays Mini tower chassis Desktop chassis Internally accessible bays five total two bays for 5 25 inch diskette tape or CD ROM drives two bays for 3 5 inch dis kette or tape drives and one bay for a 3 5 inch diskette drive four total two bays for 5 25 inch diskette tape or CD ROM drives one bay for a 3 5 inch di
19. Dell Dimension XPS M166s M200s and M233s Systems DAL Information in this manual is subject to change without notice 1997 Dell Computer Corporation All rights reserved Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden Trademarks used in this text Dell the DELL logo and Dell Dimension are registered trademarks of Dell Computer Corporation Microsoft MS DOS and Windows are registered trademarks of Microsoft Corporation Intel and Pentium are registered trademarks and MMX is a trademark of Intel Corporation IBM is a registered trademark of International Business Machines Corporation Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products Dell Computer Corporation disclaims any proprietary interest in trademarks and trade names other than its own December 1997 P N 84858 Rev A01 Contents Chapter 1 System Overview lt lt lt lt lt lt lt e e e ee 1 1 System SLT TTT 1 2 Advanced Expansion Subsystem 1 6 BIDE Subsystem Ia EKA ALE ZA Mie kha LS 1 6 Hard Disk Drive Options 1 7 System UA AA KIE Eo edes os 1 8 Power Supply RR py Se aN Va px ib de N RTA E PONO 1 8 DC Power Distribution 1 9 DC Power Connector Pin Assignments 1 11 STG m
20. IDE hard disk drive interface or installed hard disk drive control ler card Defective hard disk drive controller card if one is installed Defective system board Hard Disk category in system setup program not set to Auto INTR 1 Error Failure detected in inter rupt channel 1 during POST Defective system board INTR 2 Error Failure detected in inter rupt channel 2 during POST Defective system board Beep Codes and Error Messages 3 5 3 6 Table 3 2 System Error Messages continued Message Definition Probable Causes Invalid Boot Diskette System cannot boot from diskette in drive A Diskette in drive A contains on operating system Diskette in drive A is faulty Drive A interface or power cable faulty or improperly connected Drive A defective KB Interface BEITOCZ Error detected at key board connector Keyboard improperly connected or faulty Keyboard Error Keyboard has a timing problem Keyboard may still operate if this problem is detected To disable reporting of keyboard problems set Key board Errors category in system setup pro gram to Do Not Report Dell Dimension XPS M166s M200s and M233s Systems Service Manual Removing and Replacing Parts This chapter provides procedures for removing and replacing components assemblies and subassemblies of the computer Unless otherwise noted each of
21. M remove it from its socket and reinstall it as described in DIMMs in Chapter 4 If you need to reseat an expansion card use a 1 4 inch nut driver to remove the screw that secures the card mounting bracket Grasp the card by its top corners and carefully pull it out of its connector Reinsert the card in its connector and carefully push it in until it is fully seated Then reinstall the card mounting bracket s retaining screw 4 Verify that all system board jumpers are set correctly For information about these jumpers see System Board Jumpers in Chap ter 1 5 Check all cable connectors inside the computer to verify that they are firmly attached to their appropriate connectors 6 Reinstall the computer cover 7 Reconnect the computer and any attached peripherals to their power sources and turn them on Does the problem appear to be resolved Yes No further steps are necessary No Proceed to the next sections Eliminating Resource Conflicts Run ning the Diskette Based Diagnostics and Getting Help Basic Troubleshooting 2 5 Eliminating Resource Conflicts Devices within the computer may require dedicated memory spaces interrupt levels or DMA channels all of which must be allocated during installation of the devices Because devices may be installed at different times it is possible that the same resource is assigned to two or more devices Resource conflicts can result in disorderly or erra
22. SA expansion card system board jumpers connectors J1A1 J1A2 and J1B1 PCI expansion card connectors J2C1 J2D1 J2E1 and J2E2 Figure 1 11 System Board Features Main Memory The two DIMM sockets BANKO and BANKI accommodate SDRAM DIMMs Memory can be expanded up to 64 MB Unlike SIMMs which must be added in matched pairs DIMMs may be added individually or in pairs SDRAM DIMMs improve the performance of the computer s memory sub system by reducing the need for wait states SDRAM devices have a synchronous interface to the devices to which they are connected and are gov erned by the system clock These features reduce wait states which are often required for conventional memory devices to ensure that timing signals have been set up correctly System Overview 1 13 System Board Jumpers Z 205 Eer jumpered eoo unjumpered Figure 1 12 System Board Jumpers 1 14 Dell Dimension XPS M166s M200s and M233s Systems Service Manual D ORO ORO C C CO CG G CIS ojo fo ojo RIJ re 1 k d 3 1 Table 1 2 System Board Jumper Descriptions Jumper Description Settings A pins 1 3 Enables or disables the Set to pins 2 3 then turn on the password password features system to clear the pass allows clearing of the word s system and setup pass words Turn off power and set the jumper back to pins 1 2 to enable the password features A pins 4 6 Clears NVRAM
23. X PClIset NOTE The Dell Dimension XPS M166s M200s and M233s systems do not support the use of Pentium microprocessors without MMX technology These Dell systems incorporate an ISA expansion bus as well as a high performance PCI local bus These buses are built into the system board which also integrates the Pentium microprocessor with MMX technology and all other elements of the basic computer system The microprocessor in the Dell Dimension XPS M166s system operates at an internal frequency of 166 MHz and an external frequency of 66 MHz The Dell Dimension XPS M200s system operates at an internal frequency of 200 MHz and an external frequency of 66 MHz The Dell Dimension XPS M233s system operates at an internal frequency of 233 MHz and an external frequency of 66 MHz These microprocessors are installed in a ZIF socket to allow future upgrades when more powerful microprocessors become available The system s main memory uses one or two DIMMs in sockets on the system board Synchronous dynamic random access memory SDRAM DIMMs are supported The front of the computer has two 5 25 inch drive bays one desktop systems or two mini tower systems 3 5 inch drive bay s plus a 3 5 inch diskette drive bay The 5 25 inch and 3 5 inch drive bays can hold diskette drives tape drives or CD ROM drives System Overview 1 1 1 2 System Features In addition to the standard features found in a traditional PC the Dell Dimen sion
24. al Specifications 1 18 POST Beep COdes site one soe E AUTRE RN YO 3 2 System Error Messages 3 3 System Setup Categories A 3 Read This First A prereguisite for using this manual to service Dell computer systems is a basic knowledge of IBM2 compatible PCs and prior training in IBM compatible PC troubleshooting techniques In addition to information provided in this manual and the online System User s Guide that came with the system Dell provides the Diagnostics and Troubleshooting Guide for troubleshooting procedures and instructions on using the Dell diagnostics to test the computer system Warnings Cautions and Notes Throughout this manual there may be blocks of text printed in bold type or in italic type These blocks are warnings cautions and notes and they are used as follows WARNING A WARNING indicates the potential for bodily harm and provides instructions for how to avoid the problem CAUTION A CAUTION indicates either potential damage to hard ware or loss of data and provides instructions for how to avoid the problem NOTE A NOTE provides helpful information about using the computer system System Overview The Dell Dimension XPS M166s M200s and M233s systems are high speed single processor computer systems that use the Intel Pentium microprocessor with MMX technology and Intel 430V
25. and Set to pins 5 6 then turn on the clear CMOS causes CMOS settings system to clear NVRAM to revert to their default values at system start Turn off power and set the up jumper back to pins 4 5 to restore default CMOS settings upon start up B pins 1 3 Enables or disables Set to pins 23 to prevent load setup access to the system ing the system setup program setup program Set to pins 1 2 to allow use of the system setup program B pins 4 6 Reserved No jumper installed C D Controls the micro 166 MHz Pins 1 2 and 5 6 microprocessor processor s internal on jumper C and pins 2 3 and speed speed 5 6 on jumper D 200 MHz Pins 1 2 and 5 6 on jumper C and pins 1 2 and 5 6 on jumper D 233 MHz Pins 1 2 and 5 6 on jumper C and pins 1 2 and 4 5 on jumper D System Overview 1 15 Interrupt Assignments Table 1 3 Interrupt Assignments IRO Line Used By Available IRQO Generated by system timer IRO Generated by I O controller to indicate full keyboard output buffer IRQ2 Generated internally by interrupt controller to enable IRQ8 through IRQ15 IRQ3 Available for use by an expansion card IRQ4 Generated by I O controller to indicate that the device connected to the serial port requires service COMI or COM3 IRQ5 Available for use by an expansion card IRQ6 Generated by I O controller to indicate that the diskette drive or tape drive attached to the FLOPPY connector requires servic
26. ard Figure 1 8 DC Power Distribution 1 10 Dell Dimension XPS M166s M200s and M233s Systems Service Manual DC Power Connector Pin Assignments The power supply output voltages can be measured at the back wire side of the DC power connectors without disconnecting the connectors Figures 1 9 and 1 10 show the wire side of the connectors 5 VDC white 5 VDC red common black 5 VDC red common black 5 VDC red not connected common black PSON brown 4 5 VDC red 11 12 13 14 15 16 17 18 19 20 S 0000 000000 D D D 0 0 0 0 0 0 D 1 2 3 45 VDC red 4 5 6 7 8 9 10 common black 45 VDC red common black L common black common black 12 VDC blue 12 VDC yellow 5 VFP purple PWRGOOD grey 1 Pin 5 PWRGOOD is a status signal generated by the power supply to notify the system that the DC operating voltages are within the ranges required for proper system operation 2 Pin 11 PSONE is activated by pressing and releasing the power button while the power supply is in its standby state This action connects the power supply s PSON input to ground thereby switching the power supply to its full on condition Figure 1 9 DC Power Connector P1 System Overview 1 11 N yt P5 P6 12 34 1 2 3 4 L 45 VDC red 5VDC red common black common black common black common black 12 VDC yellow 12 VDC yellow aoo
27. d interface cables from the back of the 3 5 inch diskette drive 3 Press the two drive release tabs and slide the drive out of the bay Transfer the drive release tabs to the replacement diskette drive before install ing the new drive Removing and Replacing Parts 4 9 Primary Hard Disk Drive primary hard disk drive card guide assembly mounting screws 2 Figure 4 10 Primary Hard Disk Drive Removal To remove the primary hard disk drive follow these steps 1 2 3 4 Disconnect the power and interface cables from the back of the primary Remove the front bezel Remove the two mounting screws Lift the primary hard disk drive out of the card guide assembly hard disk drive When you replace a hard disk drive be sure to set the jumpers on the replace ment drive the same as the jumpers on the drive you removed For additional information about jumper settings on EIDE drives see EIDE Subsystem in Chapter 1 4 10 Dell Dimension XPS M166s M200s and M233s Systems Service Manual Secondary Hard Disk Drive secondary hard disk drive assembly gt e drive assembly Ql mounting screws 2 Figure 4 11 Secondary Hard Disk Drive Assembly Removal To remove the secondary hard disk drive follow these steps 1 Remove the front bezel 2 Disconnect the power and interface cables from the back of the second ary hard disk drive 3 Remove the two drive assembly mounting screws 4
28. e IRQ7 Generated by I O controller to indicate that the device connected to the parallel port requires service IRQ8 Generated by I O controller for each tick of the RTC IRQ9 Available for use by an expansion card IRQ10 Available for use by an expansion card IRQI1 Default PCI IRQ IRQ12 Generated by I O controller to indicate full mouse output buffer Available for use if no PS 2 type mouse is used IRQ13 Generated by math coprocessor to indicate a coprocessor error IRQ14 Generated by a device connected to the primary EIDE interface to indicate that the device requires service IRQ15 Generated by a device connected to the secondary EIDE interface to indicate that the device requires service If no device is con nected to the secondary EIDE interface IRQ15 is available for use by an expansion card 1 16 Dell Dimension XPS M166s M200s and M233s Systems Service Manual DMA Channel Assignments Table 1 4 DMA Channel Assignments DREQ Line Used By Available DREOO Available for use by an expansion card DREQI Available for use by an expansion card DREQ2 Generated by I O controller to enable DMA cycle for attached diskette drive DREQ3 Available for use by an expansion card DREQ4 Reserved DREQ5 Available for use by an expansion card DREQ6 Available for use by an expansion card DREO Available for use by an expansion card System Overview 1 17 Technical Specifications Table 1 5 Technical Specificat
29. e 4 26 Then slide the system board toward the front of the system unit slightly to free the board from the hooked standoffs and lift the system board out of the chassis 10 Remove the mounting bracket see Figure 4 28 from the back of the system board C ULL system board system board mounting bracket Figure 4 28 Bracket Removal Systems With Hooked Standoffs 4 26 Dell Dimension XPS M166s M200s and M233s Systems Service Manual 11 Remove the microprocessor DIMMs and cache card if present from the old system board for installation on the replacement board Before installing the replacement system board transfer the system board mounting bracket for computers with hooked standoffs only DIMMs cache card if present and microprocessor to the new system board Also set the system board jumpers to match the old system board When installing a replacement system board angle the back of the board down ward and carefully align the connectors on the back edge of the board with the cutouts in the I O gasket see Figure 4 24 When properly aligned the board connectors slide into the I O gasket as you seat the board lowering it into posi tion in the chassis For systems with hooked standoffs press down on the left front edge of the sys tem board to seat the board firmly over the plastic standoff see Figure 4 26 Then install the mounting screw as shown in Figure 4 27 For systems with five m
30. ermine if he or she is making an error such as typing an incorrect key combination or entering a command incorrectly Is the problem a result of user error Yes Instruct the user in the proper procedure or direct him or her to the appropriate user documentation for the correct procedure No Proceed to the next section External Visual Inspection Basic Troubleshooting 2 1 2 2 External Visual Inspection The external visual inspection consists of a quick inspection of the exterior of the computer the monitor the keyboard any peripherals and cables While per forming the visual inspection make any necessary corrections To perform the external visual inspection follow these steps 1 Turn off the computer the monitor and all peripherals 2 Verify that all power cables are properly connected to the computer the monitor and peripherals and their power sources 3 Verify that the keyboard and mouse interface cables are firmly attached to the proper connectors on the back of the computer For a PS 2 compatible mouse the keyboard and mouse interface cable connectors are identical except for their labels Verify that the keyboard and mouse interface connectors are firmly attached to their proper connectors on the back of the computer If needed see Figure 1 6 in Chapter 1 For a serial mouse the mouse interface cable must be firmly attached to the serial port connector and its captive screws must be secure enough to
31. erving the Boot Routine After you have performed an external visual inspection as described in the pre vious section you should boot the system and while the boot routine is running observe the system for any indications of problems NOTE Most of the steps in this procedure require observation of system func tions and indications some of which can occur simultaneously It may be necessary to reboot the system several times in order to complete all of these steps To observe problem indications during the boot routine follow these steps 1 Insert the diagnostics diskette into drive A Turn on all peripherals and the computer NOTE If the computer is already on save and close all open files and application programs if possible to avoid losing any data Then perform an orderly shutdown of the operating system see the operating system doc umentation for instructions before rebooting the system by pressing the reset button or Ctrl Alt Delete keys 2 Check the power supply fan Does the fan run normally Yes Proceed to step 3 No Troubleshoot the system power supply 3 Watch the Num Lock Caps Lock and Scroll Lock indicators on the upper right corner of the keyboard After all three indicators flash momentarily the Num Lock indicator should light up and remain on Do these indicators flash on and off within approximately ten seconds after the boot routine starts Yes Proceed to step 4 No Troubleshoot
32. following information about DC power distribution Power supply cable identification Typical DC power connections for diskette tape CD ROM and hard disk drives e Pin assignments of DC power connectors Power distribution to sockets and connectors on the system board J E SO d N L b Ay Y RIT SS Ps M WV Wr IA D b p N Figure 1 7 DC Power Cables System Overview 1 9 5 25 inch drive P2 3 8 VDC GND 5 25 inch PWRGOOD e e i drive 12 VDC P3 power 5 VDC A e supply 5 VDC 3 5 inch drives e second drive 5 VDC e uses Y cable P5 GND e e 5 VSB 3 5 inch PSON e diskette drive P4 primary hard disk drive power O switch L i Ld secondary P6 f hard disk drive uses Y cable POWER 3 3 VDC battery RTC PSON GND l T oe GND T H 5 VSB J1A1 COAST LJ J1A2 GND J1B1 45 VDC 4 5 VDC 5 VDC J2C1 BANKO WM wp 12 VDC e J2D1 12 VDC Ue t 2E2 mwe BANK1 i GND GND fuse e 5 VDC KEYBD Ny d GND 45 VDC MSE 2 8 VDC converter GND fuse e 5 VDC USBO dv USB1 CPU syst Ed M s system 12 VDC logic GND e system bo
33. ing screws and remove the drive bracket from the drive If you are working on a desktop chassis the small plastic filler panel remains in place on the front face of the drive bracket When you replace a drive be sure to set the jumpers on the replacement drive the same as the jumpers on the drive you removed For additional information about jumper settings on EIDE drives see EIDE Subsystem in Chapter 1 Removing and Replacing Parts 4 7 Lower 3 5 Inch Drive N sa screws 3 Figure 4 8 Lower 3 5 Inch Drive Removal NOTE The following procedure applies only to the mini tower chassis The lower 3 5 inch drive attaches to the left side and bottom of the drive cage To remove a drive from the lower 3 5 inch drive bay follow these steps 1 Remove the front bezel 2 Remove the drive cage and drives as an assembly 3 Remove the three drive mounting screws from the left side and bottom of the drive cage When you replace a drive be sure to set the jumpers on the replacement drive the same as the jumpers on the drive you removed For additional information about jumper settings on EIDE drives see EIDE Subsystem in Chapter 1 4 8 Dell Dimension XPS M166s M200s and M233s Systems Service Manual 3 5 Inch Diskette Drive drive release tabs 2 Figure 4 9 3 5 Inch Diskette Drive Removal To remove the 3 5 inch diskette drive follow these steps 1 Remove the front bezel 2 Disconnect the power an
34. ions Microprocessor Microprocessor type Microprocessor speeds Compatibility speeds Internal cache Math coprocessor Intel Pentium microprocessor with MMX technology 166 66 MHz internal external 200 66 MHz 233 66 MHz slower speed can be set through system setup program 32 KB internal to microprocessor System Information System chip set Data bus width Address bus width DMA channels Interrupt levels System BIOS chip System clock frequency Diskette communications ports frequency Intel 430VX PCIset 64 bits 32 bits seven 15 128 KB 66 MHz matches microprocessor s external frequency 24 MHZ derived from system clock Expansion Bus BUS ly pes S4 exe y te es PCI specification ISA bus frequency PCI bus frequency ISA expansion card connectors PCI expansion card connectors ISA and PCI 2 1 8 25 MHz 33 MHz three one connector shares card slot opening with PCI expansion card connector four one connector shares card slot opening with ISA expansion card connector 1 18 Dell Dimension XPS M166s M200s and M233s Systems Service Manual Table 1 5 Technical Specifications continued Memory DIMM sockets two DIMM capacities 16 and
35. isolate the source of the problem For instructions on starting and using the diskette based diagnostics see Running the Diskette Based Diagnostics in Chapter 2 Posr Beep Codes If the monitor cannot display error messages during the POST the system may emit a series of beeps that identifies the problem or that can help you identify a faulty component or assembly All beep codes except beep code 8 indicate a fatal error that prevents the system from completing the boot routine until the indicated condition is corrected NOTE It is normal for the computer to emit a single beep during the boot rou tine If the boot routine completes successfully this single beep is not considered a beep code When the system emits a beep code record the code and then find it in Table 3 1 If Table 3 1 does not lead to the source of the problem run the appro priate tests in the diskette based diagnostics Beep Codes and Error Messages 3 1 3 2 Table 3 1 POST Beep Codes Beep Code Error Probable Causes 1 Memory refresh failure Defective system board 2 Error occurred in the first 64 KB of main memory A DIMM is faulty Replace all of the DIMMs Defective system board Reador write error occurred in the first 64 KB of main memory A DIMM is faulty Replace all of the DIMMs Timer on the system board malfunctioned Defective system board Microprocessor error Defective microproce
36. iun obe ue ot alata wae 4 6 Upper 3 5 Inch DEVE WA AA ee ae DR DR Re ee RS 4 7 Lower 3 5 Inch Drive 4 8 3 Inch Diskette Drive 2 33 oes See po Coa ee a ka FA we 4 9 Primary Hard Disk Drive 4 10 Secondary Hard Disk Drive 4 11 Power Supply el cade RE ATI RAT asthe Mi was ae dae Rare DUNS 4 13 Cooling Pan Assembly 4 14 Expansion Cards R Rer N RN ib rd De pos MUR e Aa Mu RS iind 4 15 Card Guide Assembly orere trenge tesia Ka 4 16 Control Panel Board Ls sx prt ee pea R Oe Ee N NURSE 4 17 System Board Components 4 18 DIMMS oria pn EE ha ho RES BRAUN SE OLST ER ew OR ORG HH 4 19 Cache Cardi vios on EX Kyo ele sed Oe Se Ra eek oe Tue Ve 4 20 Microprocessor Heat Sink Assembly 4 21 Battery ives REE eet OE ote be bake RR E ee RE aes ERA 4 23 System Board soe deg Shane gh Gee He Se RES eae Ree eee 4 24 Appendix A System Setup Program A 1 System Setup Screens mo ove oam ves Oe eR WA ha ARS A 2 Index Figures Figure 1 1 Figure 1 2 Figure 1 3 Figure 1 4 Figure 1 5 Figure 1 6 Figure 1 7 Figure 1 8 Figure 1 9 Figure 1 10 Figure 1 11 Figure 1 12 Figure 4 1 Figure 4 2 Figure 4 3 Figure 4 4 Figure 4 5 Figure 4 6 Figure 4 7 Figure 4 8 Figure 4 9 Figure 4 10 Figure 4
37. m 50 to 10 000 ft 16 to 10 600 m 50 to 35 000 ft System Overview 1 21 1 22 Dell Dimension XPS M166s M200s and M233s Systems Service Manual Basic Troubleshooting f chapter describes basic troubleshooting procedures that can help you diagnose a computer system problem These procedures can often reveal the source of a problem or indicate the correct starting point for troubleshooting the system A brief explanation of how to load and start the diskette based diagnos tics is located at the end of the chapter Dell recommends that you perform the following procedures in the order they are presented in this chapter Initial User Contact When you first contact a user who has a problem ask the user to describe the problem and the conditions under which it occurs A verbal description can often indicate the cause of a problem or the appropriate troubleshooting proce dure to use After the user describes the problem follow these steps 1 Ask the user to back up any data on the hard disk drive if the system s condition permits See Maintaining the System in the online System User s Guide for infor mation about backing up data 2 Ask the user to try to duplicate the problem by repeating the operations he or she was performing at the time the problem occurred Can the user duplicate the problem Yes Proceed to step 3 No Proceed to the next section External Visual Inspection 3 Observe the user to det
38. matting Drive interface or power cable not prop erly connected Defective drive inter face or power cable Defective drive C Cache Memory Bad Do Not Enable Cache Cache memory sub system not functioning properly Defective micro processor cache card or system board CH 2 Timer Error Error occurred in sys tem timer 2 Defective system board CMOS Battery State Low System battery not maintaining contents of NVRAM System battery at or near depletion of its charge Beep Codes and Error Messages 3 3 Table 3 2 System Error Messages continued Message Definition Probable Causes CMOS Checksum NVRAM checksum Incorrect settings in Failure value changed since system setup program NVRAM contents were saved CMOS Display Video type in NVRAM Display type detected Type Mismatch does not match type of by system BIOS does video system installed not match type actually installed CMOS Memory Size Mismatch Amount of main mem ory installed on system board does not match amount reflected by NVRAM Amount of main mem ory detected by system BIOS does not match amount actually installed CMOS System Options Not Set System option parame ters in NVRAM not set One or more configura tion settings in system setup program are cor rupted or improperly set CMOS Time and Date Not Set System configuration settings for time and date in
39. ndary Hard Disk Drive Assembly Removal 4 1 Secondary Hard Disk Drive Removal 4 12 Power Supply Removal 4 13 Cooling Fan Assembly Removal 4 14 Expansion Card Removal 4 15 Card Guide Assembly Removal 4 16 Control Panel Board Removal 4 17 System Board Components 4 18 DIMNEReIogal sacii e EE ELMAR 4 19 DIMM Replacement 4 19 Cache Card Removal 4 20 Microprocessor Heat Sink Assembly Removal 4 21 Battery Removal 28 et IR AREE ESTEE 4 23 System Board Removal 4 24 System Board Mountings Five Screws 4 25 vii vili Figure 4 26 Figure 4 27 Figure 4 28 Figure A 1 Tables Table 1 1 Table 1 2 Table 1 3 Table 1 4 Table 1 5 Table 3 1 Table 3 2 Table A 1 System Board Mountings Hooked Standoffs 4 25 Mounting Screw and Bracket Systems With Hooked Standoffs 4 26 Bracket Removal Systems With Hooked Standoffs 4 26 System Setup Screens A 2 DC Voltage Ranges scere Ide ER rh TIE Ix i 1 8 System Board Jumper Descriptions 1 15 Interrupt Assignments 1 16 DMA Channel Assignments 1 17 Technic
40. ort this feature Enabling this feature for drives that do not support it may cause the EIDE drive to become inoperable until the system is restarted and the Power Management category is disabled Video Power Down NOTE When the system is running Windows 95 do not enable this category Use the Display Properties dialog box in the Control Panel to save monitor power Selects reduced power consumption for DPMS compliant monitors CAUTION Before enabling this feature check the monitor documentation to make sure the monitor is DPMS compliant other wise there is a risk of damaging the monitor Sound Enables or disables the integrated audio controller Serial Port Configures the built in serial port The port s I O address can be set to Auto COMI or COM3 or the port may be disabled A 4 Dell Dimension XPS M166s M200s and M233s Systems Service Manual Table A 1 System Setup Categories continued Category Function Parallel Port Configures the built in parallel port The port s I O address may be set to 378H the default 278H or 3BCH or the port may be disabled NOTE Do not set the port to 278H if you have an ECP device attached to the port Parallel Mode Controls whether system s built in parallel port acts as an AT compatible unidirectional PS 2 compatible bidirectional or ECP port NOTE Windows 95 automatically configures the port for ECP mode if an ECP device is a
41. ounting screws continue pushing the system board against the I O gasket while you secure the board to the chassis with the screws CAUTION Failure to install the system board exactly as described may result in EMI leakage that could interfere with other electronic devices Removing and Replacing Parts 4 27 4 28 Dell Dimension XPS M166s M200s and M233s Systems Service Manual JEU Setup Program This appendix describes the system setup program which is used to change the system configuration information stored in NVRAM on the system board To enter the system setup program follow these steps 1 Turn on or reboot the system 2 Press Delete immediately after the computer s speaker emits a beep If you press the Delete key within the time allowed the message Press DEL Key if you want to Run SETUP changes to Entering Setup Please Wait If you wait too long and the operating system begins to load into memory let the system complete the load operation then shut down the system and try again NOTE To ensure an orderly system shutdown consult the documentation that accompanied the operating system System Setup Program A 1 System Setup Screens Page 1 of 2 Dell Computer Corporation System XPS M200s Setup BIOS Version AXX This category sets th time in 24 hour format seconds for the calendar hours minutes internal clock To change the
42. p can get extremely hot during intense system operations Be sure the chip has had sufficient time to cool before you touch it 1 Remove the microprocessor securing clip from the microprocessor heat sink assembly Press down on the folded part of the clip with a small screwdriver to release the clip 2 Push outward and then upward on the microprocessor socket release lever and rotate the lever to its fully vertical position Removing and Replacing Parts 4 21 3 Lift the microprocessor heat sink assembly out of its socket To install the replacement microprocessor heat sink assembly ensure that the microprocessor socket release lever is in its fully vertical position to allow the microprocessor pins to easily slip into the socket When the microprocessor heat sink assembly is in place rotate the microprocessor socket release lever to its hor izontal position Hook the microprocessor securing clip over the socket tab nearest the front of the system board and then snap it over the tab on the back of the socket NOTE Pin 1 on the microprocessor is located on the corner with the largest bevel The pin 1 hole in the microprocessor socket is located on the corner where the holes are in a diagonal pattern 4 22 Dell Dimension XPS M166s M200s and M233s Systems Service Manual Battery m battery socket Ne r3 B Figure 4 23 Battery Removal The battery is a 3 0 V coin cell CR2032 type battery To remove the ba
43. pansion card This feature should not be enabled unless an expansion card that requires special addressing is installed CPU Speed Indicates processor speed at which system boots the processor s rated speed or a slower compatibility speed Num Lock Determines whether keyboard s Num Lock mode is activated at system start up Keyboard Errors Enables or disables reporting of keyboard errors during POST System Setup Program A 3 Table A 1 System Setup Categories continued Category Function System Password Displays current status of system s password security feature Also used to assign and verify a new password Password Status Controls whether the system password is enabled or disabled at boot time Setup Password Displays current status of setup password Also used to assign and verify a new password Boot Sequence Determines whether system boots from a diskette if present or hard disk drive Power Management NOTE When the system is running Windows 95 do not enable this category Use the Display Properties dialog box in the Control Panel to save monitor power Enables reduced power consumption for DPMS compliant monitors and most EIDE drives CAUTION Before enabling this feature check the monitor documentation to make sure the monitor is DPMS compliant other wise there is a risk of damaging the monitor NOTE Not all EIDE hard disk drives supp
44. ponents Advanced Expansion Subsystem This computer offers an advanced expansion subsystem that can support a mix ture of traditional ISA expansion cards called legacy expansion cards Plug and Play ISA expansion cards and PCI expansion cards The Microsoft Windows 95 operating system provides the means to configure the various types of expan sion cards and avoid resource conflicts that might arise After all legacy expansion cards have been configured by the operating system the system automatically assigns any required memory space IRQ lines and DREO lines to any installed Plug and Play expansion cards and PCI expansion cards the next time the system is booted The expansion card slots include three ISA expansion card connectors and four PCI expansion card connectors One PCI expansion card connector and one ISA expansion card connector share a single expansion card slot so a maxi mum of six expansion cards can be installed EIDE Subsystem The EIDE subsystem includes two EIDE interfaces primary and secondary each of which can support up to two EIDE devices such as high capacity EIDE hard disk drives CD ROM drives and tape drives When an EIDE tape drive or CD ROM drive is connected to the same interface connector as a hard disk drive the performance of the hard disk drive is degraded Therefore the primary EIDE interface should be used for connecting hard disk drives only Any EIDE tape drives or CD ROM drives
45. res are briefly described in this chapter For a complete list of system features see Technical Specifications found later in this chapter Dell Dimension XPS M166s M200s and M233s Systems Service Manual When following the descriptions in this manual assume that the locations or directions relative to the computer are as shown in Figure 1 1 NOTE Some service procedures recommend laying the mini tower computer on its right side to improve service access but the descriptions continue to use the directions shown for mini tower computers in Figure 1 1 back back left right side side left right side side front front Mini Tower Computers Desktop Computers Figure 1 1 Computer Orientation 3 5 inch diskette drive EIL I 5 25 inch E u i nS T 3 5 inch s drive bay power button reset button hard disk drive access indicator Figure 1 2 Desktop Computer Front Panel Features Europe Only System Overview 1 3 power supply cooling fan secondary hard disk drive bracket system board drive cage filler brackets drive bays typical card guide assembly and 4 Snch diskette primary hard disk drive drive hard disk drive power Dutton access indicator reset button front bezel Figure 1 3 Internal View of the Desktop Computer 5 25 inch drive bays 2 3 5 inch drive bays 2 3 5 inch diskette cy drive LI power button hard disk drive access indicator z a V
46. s kette or tape drive and one bay for a 3 5 inch diskette drive two bays for 1 inch high EIDE or SCSI hard disk drives Controls and Indicators Reset control push button Power control push button Power indicator green LED Hard disk drive access indicator green LED Power DC power supply Wattage 200 W Input voltage 90 to 135 VAC at 60 Hz or 180 to 265 VAC at 50 Hz Physical Mini tower chassis 43 69 cm 17 2 inches 20 32 cm 8 inches 44 45 cm 17 5 inches 11 3 to 13 6 kg 25 to 30 Ib 16 0 cm 6 3 inches 42 42 cm 16 7 inches 44 45 cm 17 5 inches 11 3 to 13 6 kg 25 to 30 Ib 1 20 Dell Dimension XPS M166s M200s and M233s Systems Service Manual Table 1 5 Technical Specifications continued Environmental Temperature Operating Storage Relative humidity Maximum vibration Operating Storage Mazimum shock Operating Storage Altitude Operating Storage 10 to 35 C 50 to 95 F 40 to 65 C 40 to 149 F 896 to 8096 noncondensing 0 25 G at 3 to 200 Hz at 2 octaves minute 0 50 G at 3 to 200 Hz at 2 octaves minute Bottom only half sine pulse with a velocity change of 20 inches sec 23 G square wave with a velocity change of 200 inches sec 16 to 3048
47. should be con nected to the secondary EIDE interface When two EIDE drives are connected to a single EIDE interface cable a master slave relationship between the two drives must be defined so that they will operate correctly Dell Dimension XPS M166s M200s and M233s Systems Service Manual Assigning the master and slave designations usually involves resetting jumpers on the circuit card on the underside of each drive The master slave relationship is defined in different ways for different types of drives For details about your specific drive refer to the documentation included with the drive When you replace a drive look at the jumpers on the removed drive to set the jumpers on the replacement drive NOTE The externally accessible drive bays at the front of the computer are normally used for diskette drives CD ROM drives or tape drives Hard disk drives should be installed in the internal drive bays described in the next sub section Hard Disk Drive Options For detailed information about the data storage subsystem see Chapter 5 Installing Drives in the Reference Guide Hard Disk Drive Options A inch high EIDE hard disk drive is installed in the primary hard disk drive bay in the card guide assembly at the front of the chassis An optional 1 inch high EIDE hard disk drive can be installed in the secondary hard disk drive bay located to the left of the 3 5 inch diskette drive desktop or below the 3 5 inch diskette drive
48. ssembly Removal To remove the card guide assembly follow these steps 1 Uy So A TK Disconnect any cables connected to full length expansion cards and remove these expansion cards Note the location of each connector and the orientation of any cables attached to the expansion cards before disconnecting these cables Remove the 3 5 inch diskette drive Remove the primary hard disk drive If a secondary hard disk drive assembly is present remove it Disconnect the control panel cable from connector J9E1 on the system board see Figure 4 18 Press the four mounting tabs that secure the card guide assembly to the front panel and press on the tab at the back of the card guide assembly Lift the card guide assembly including the control panel cable out of the chassis 4 16 Dell Dimension XPS M166s M200s and M233s Systems Service Manual Control Panel Board sS i control panel board LA card guide ay bOan Sh q K Figure 4 17 Control Panel Board Removal mounting tab To remove the control panel board follow these steps 1 Remove the front bezel 2 Remove the card guide assembly 3 Press the mounting tab to release the control panel board from the card guide assembly and remove the control panel board Removing and Replacing Parts 4 17 System Board Components Figure 4 18 shows the locations of components on the system board The sub sections that follow explain how to remove the various
49. ssor Gate A20 failure Defective system board Microprocessor exception in terrupt error Defective microprocessor Video memory read write failure Video adapter missing or faulty ROM checksum value does not match value encoded in system BIOS Corrupted system BIOS program Defective system BIOS chip 10 NVRAM shutdown register write read error Defective system board 11 Cache memory error Defective microprocessor cache card or system board Dell Dimension XPS M166s M200s and M233s Systems Service Manual System Error Messages Some system error messages indicate fatal error in which case the system can not usually be rebooted until an appropriate hardware change has been made The following messages indicate a fatal error 8042 Gate Error DMA 1 Error 2 Error DD Control ler Fai A20 error lure D D DMA F H DD Control ler Fai lure INTR 1 Error INTR 2 Error Table 3 2 System Error Messages Message Definition Probable Causes 8042 Gate A20 Gate A20 of keyboard Defective system Error controller is faulty board Address Line Address decoding not Defective system shorts properly executed on board system board C Drive Error No response from drive C Incorrect drive settings in system setup pro gram C Drive Failure Drive C failed Drive C needs refor
50. system board components NOTE The cache card connector COAST appears only on early versions of the system board Later versions have the cache memory chips soldered directly on the system board keyboard microprocessor cache card socket power input microprocessor fan connector socket U3L1 KEYBD COAST connector POWER mouse connector MSE USB connectors USBO and USB1 serial port prat connector COM1 parallel port connector PARALLEL Z 192205 integrated audio controller jacks LINE OUT LINE IN and MIC below MIDI game port GAME above CD ROM drive audio cable connector CD wave table expansion card connector WAVE ISA expansion card connectors J1A1 J1A2 and J1B1 Figure 4 18 System Board Components 4 18 Dell Dimension XPS M166s M200s and M233s Systems Service Manual control panel connector J7M1 battery socket BH9L1 3 3 V power input connector 3 3V primary EIDE channel connector PRI IDE diskette drive interface connector FLOPPY secondary EIDE channel connector SEC IDE DIMM sockets BANKO and BANK1 connector J9E1 access indicator cable connector HDLED cable attaches to pins 1 4 on header i SCSI hard disk drive system board jumpers PCI expansion card connectors J2C1 J2D1 J2E1 and J2E2 DIMMs ejector tabs 2 Figure 4 19 DIMM Removal To remove a DIMM
51. system setup program appear to be incorrect Time and or Date cate gories in system setup program need reset ting D Drive Error No response from drive D Incorrect drive settings in system setup pro gram D Drive Failure Drive D failed Drive D needs reformatting Drive interface or power cable not prop erly connected Defective drive inter face or power cable Defective drive D Diskette Boot Failure System cannot boot from diskette in drive A Diskette in drive A probably does not con tain bootable operating system or bootable operating system is corrupt Dell Dimension XPS M166s M200s and M233s Systems Service Manual Table 3 2 System Error Messages continued Message Definition Probable Causes DMA Bus Time out Device has driven DMA bus signal longer than allowable 7 8 micro seconds Defective system board DMA Error Error condition occurred in DMA controller Defective system board DMA 41 Error Error condition occurred in DMA channel 1 Defective system board DMA 2 Error Error condition occurred in DMA channel 2 Defective system board FDD Controller Failure System BIOS cannot communicate with diskette tape drive controller Operating system cor rupted or not installed properly HDD Controller Failure System BIOS cannot communicate with E
52. t P next Esc exit Alt B reboot Figure A 1 System Setup Screens A 2 Dell Dimension XPS M166s M200s and M233s Systems Service Manual Table A 1 System Setup Categories Category Function Time Resets time on computer s internal clock Date Resets date on computer s internal calendar Diskette Drive A Identifies type of diskette drives installed Tape Diskette Drive B drives are not reflected in these categories Drives Primary Secondary Identifies drives attached to primary and second ary EIDE connectors on system board Each EIDE connector supports two EIDE drives Drive 0 and Drive 1 For most EIDE devices the computer provides an automatic drive type detect feature To use this feature select Auto option If you are using a hard disk drive that does not support automatic drive type detection enter its parameters directly To do so highlight the appro priate Drive category Drive 0 or Drive 1 and type u to display User Press Tab to highlight each of the parameter fields in succession and enter the appropriate number for each field For a non EIDE drive set this category to None Base Memory Displays amount of memory available to MS DOS programs that do not use extended or expanded memory Extended Memory Displays amount of memory available as extended memory Reserved Memory Designates a region of system board memory that can be supplied by an ex
53. tic system operation or failure of the system to operate at all If you suspect that resource conflicts might exist check the system resources and reassign the resources as necessary For more information about solving resource conflicts see Chapter 4 Finding Software Solutions in the Diagnostics and Troubleshooting Guide R unning the Diskette Based Diagnostics The diskette based diagnostics included with the system contains tests that aid in troubleshooting all major components of the computer system CAUTION To prevent damage to the original diagnostics diskette always use a backup copy of the diagnostics diskette when servicing a user s computer Dell recommends that users make several copies of this diskette to ensure that one is always available To start the diagnostics turn off the system insert a diagnostics diskette into drive A and then turn on the system Starting the diagnostics causes the Dell logo screen to display followed by a message indicating that the diagnostics is loading Before the diagnostics loads a program tests the portion of main memory RAM required for loading the diagnostics If a main memory error is detected a message appears on the screen telling you which DIMM has failed If no errors are found in main memory the diagnostics loads and the Diagnos tics Menu appears This menu lets you exit to the MS DOS prompt or choose one of the following options e Run Quick Tests
54. ttached Hard Disk Enables or disables the built in EIDE hard disk drive interface Diskette Enables or disables the built in diskette drive controller Speaker Enables or disables the built in speaker USB Enables or disables the built in USB ports Microprocessor Displays type of microprocessor installed External Cache Displays amount of external cache memory installed on the system board System Memory Displays entire amount of installed memory detected in system except for memory on EMS expansion cards Service Tag Displays the service tag number System Setup Program A 5 A 6 Dell Dimension XPS M166s M200s and M233s Systems Service Manual Index A adapter cards removal 4 15 B back panel features 1 5 battery removal 4 23 beep codes 3 1 bezel removal 4 3 boot routine observing when troubleshooting 2 3 C cache card removal 4 20 card guide assembly removal 4 16 computer back panel features 1 5 front panel features desktop 1 3 front panel features mini tower 1 4 internal view desktop 1 4 internal view mini tower 1 5 orientation 1 3 connector locations 1 13 cooling fan removal 4 14 cover removal 4 2 D DC power connector pin assignments 1 11 diagram 1 10 distribution 1 9 voltage ranges 1 8 DIMM removal and replacement 4 19 diskette drive removal 4 9 diskette based diagnostics 2 6 DMA channel assignments
55. ttery follow these steps 1 If possible enter the system setup program see Appendix A System Setup Program for instructions and make a printed copy of the sys tem setup screens 2 Remove the computer cover 3 Remove the battery by prying it out of its socket with your fingers or a blunt nonconductive object such as a plastic screwdriver To replace the battery install the new battery with the 4 side facing up Then start the system setup program and reset the Date and Time categories Com pare the system configuration settings with the copy made in step 1 Restore any system configuration information that was lost while replacing the battery Removing and Replacing Parts 4 23 System Board LO gasket 3 5 inch diskette drive 1 secondary hard disk drive assembly gt V LESS HT system board r7 E iZ 2 o o Figure 4 24 System Board Hemoval To remove the system board follow these steps 1 Disconnect any cables attached to the I O panel on the back of the sys tem unit Remove any installed expansion cards Note the location of each connector and the orientation of any cables attached to the expansion cards before disconnecting these cables Remove the 3 5 inch diskette drive and the secondary hard disk drive 4 Disconnect all internal cables from the system board The cables attached to the PRI IDE SEC IDE and FLOPPY connectors see Figure
56. u proceed with the internal visual inspection described in this section ensure that the user has saved all open files and exited all open application programs if possible A simple visual inspection of a computer s interior hardware can often lead to the source of a problem such as a loose expansion card cable connector or mounting screw When you perform the visual inspection refer to System Fea tures in Chapter 1 to locate system components To perform the internal visual inspection follow these steps 1 Turn off the system including any attached peripherals and disconnect all the AC power cables from their power sources 2 4 Dell Dimension XPS M166s M200s and M233s Systems Service Manual 2 Remove the computer cover NOTE For your safety and protection of the system observe the guidelines listed in Precautionary Measures in Chapter 4 3 Verify that the DIMMS cache card microprocessor and expansion cards are fully seated in their sockets or connectors WARNING The microprocessor heat sink assembly can get extremely hot Be sure the assembly has had sufficient time to cool before you touch it While reseating the microprocessor heat sink assembly use a wrist grounding strap or maintain contact with a metal surface on the chassis To reseat the microprocessor remove it from its socket and reinstall it as described in Microprocessor Heat Sink Assembly in Chapter 4 To reseat a DIM
57. us types of drives in the drive bays For additional informa tion about drive installation and configuration see Chapter 5 Installing Drives in the Reference Guide Front Panel Insert tabs 2 front panel retaining hook insert Figure 4 4 Front Panel Insert Removal The front panel inserts are attached to the drive cage Any empty bay should have a front panel insert installed To remove a front panel insert follow these steps 1 Remove the front bezel 2 Press the two tabs on the right side of the front panel insert 3 Rotate the right side of the front panel insert outward to disengage the retaining hook on the left side of the insert from the chassis Dell Dimension XPS M166s M200s and M233s Systems Service Manual Drive Cage drive cage Screw Figure 4 5 Drive Cage Removal NOTE The drive cage is the same in both the desktop and mini tower comput ers The drive cage in the mini tower computer is mounted 90 degrees clockwise from the one shown in Figure 4 5 This rotation positions the drives horizontally when the computer is set up Whenever you need to remove or install a drive in the drive cage first remove the drive cage from the chassis as follows 1 Note the location and orientation of all cables attached to drives installed in the drive cage Then disconnect the cables 2 Remove the screw at the top of the drive cage securing it to the chassis 3 Slide the drive cage forward appro
58. ving and Replacing Parts 4 13 Cooling Fan Assembly J7M1 connector cooling fan assembly release buttons Figure 4 14 Cooling Fan Assembly Removal To remove the cooling fan assembly follow these steps 1 Disconnect the cooling fan cable from the J7M1 connector on the sys tem board see Figure 4 18 2 Atthe back of the chassis press the two cooling fan assembly release buttons and lift the cooling fan assembly out of the chassis Maintain upward pressure on the fan assembly while you press the two cooling fan assembly release buttons 4 14 Dell Dimension XPS M166s M200s and M233s Systems Service Manual Expansion Cards retaining screw card mounting bracket n ISA expansion card card edge connector ISA expansion card connector front of computer card guide Figure 4 15 Expansion Card Removal To remove an expansion card follow these steps 1 Disconnect any cables from the expansion card Note the location of each connector and the orientation of any cables attached to the expansion card before disconnecting these cables 2 Remove the retaining screw from the card mounting bracket Grasp the expansion card by its corners and carefully pull it out of its expansion card connector Removing and Replacing Parts 4 15 Card Guide Assembly tab card guide assembly t L I Figure 4 16 Card Guide A
59. ximately one half inch Then lift it up and away from the chassis The side of the chassis contains a detent that locks the drive cage into place The drive cage may be slightly difficult to slide forward until it is detached from this detent Removing and Replacing Parts 4 5 5 25 Inch Drive drive mounting screws 3 Figure 4 6 5 25 Inch Drive Removal To remove a drive from a 5 25 inch drive bay follow these steps 1 Remove the front bezel 2 Remove the drive cage and drives as an assembly 3 Remove the three drive mounting screws and slide the drive out of the bay When you replace a drive be sure to set the jumpers on the replacement drive the same as the jumpers on the drive you removed For additional information about jumper settings on EIDE drives see EIDE Subsystem in Chapter 1 4 6 Dell Dimension XPS M166s M200s and M233s Systems Service Manual Upper 3 5 Inch Drive drive assembly mounting screws 2 drive bracket gaa mounting screws 2 drive bracket Figure 4 7 Upper 3 5 Inch Drive Removal The upper 3 5 inch drive uses a drive bracket between the drive and the right side of the drive cage To remove a drive from the upper 3 5 inch drive bay follow these steps 1 2 3 Remove the front bezel Remove the drive cage and drives as an assembly Remove the two drive assembly mounting screws and slide the drive assembly out of the bay Remove the two drive bracket mount
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