Compaq Deskpro EN Series Manual

System Unit
1 Computer cover 226774-001
2 Front bezel 201488-001
3 Expansion card cage not spared
4 Power supply 176763-001
5Chassis assembly with drive cage not spared
6Front trim (below front bezel) 201487-001
Mass Storage Devices
110-GB UATA (66/7200) hard drive 135364-001
*10-GB, 5400 RPM Quiet hard drive 203139-001
*10-GB UATA (100/7200) hard drive 180471-001
*10-GB UATA (100/7200) Quiet hard drive 180472-001
*10-GB UATA (66/7200) Quiet hard drive 192058-001
*15-GB 7200 Quiet hard drive 180473-001
*15-GB 7200 hard drive 180474-001
*15-GB UATA (66/7200) hard drive 192060-001
*15-GB UATA (66/7200) Quiet hard d rive 192059-001
*20-GB UATA, 7200 hard drive 157403-001
*20-GB UATA (100/7200) hard drive 180475-001
*20-GB UATA (100/7200) Quiet hard drive 180476-001
*30-GB UATA, 7200 hard drive 180477-001
2Diskette drive, buttonless, opal 191714-001
340X CD-ROM drive 400807-001
*48X CD-ROM drive 187263-001
*Not shown
Cables
Cable kit, includes: 201486-001
1Diskette drive data cable, 8.5” (168999-001)
2CD-ROM audio cable, 12” (387527-001)
3Hard drive data cable, 18” (180950-016)
*Solenoid cable (174311-001)
*CD-ROM data cable, 18” (108950-017)
Cable kit, includes: 192264-001
* Hard drive/CD-ROM data cable, 18” (108950-019)
* 40-Pin IDE data cable, 12.5” (105876-001)
* Audio cable, 21” (288489-002)
* Audio cable, 21” (387527-001)
* Hard drive/CD-ROM data cable, 9.75” (108950-
021)
Cable kit, includes: 192263-001
* CD-ROM data cable, 18”, (108950-017)
* Audio cable, 21”, (387527-002)
*Not shown
Miscellaneous Parts
1 Mouse, scroll, opal 334689-002
2 Battery 153099-001
3 Solenoid, 2-coil 201485-001
4 Speaker 201273-001
* External speaker 294408-001
5 Front bezel 201488-001
6 Front trim (below front bezel) 201487-001
* Lever, tilt/stop 222052-001
* Security reader 294427-001
* Tamper resistant T-15 wrench 166527-001
* Tamper resistant T-15 bit (5 ea) 166527-002
*Not shown
Standard and Optional Boards
1System board including 16 MB integrated AGP
graphics 187499-001
2System board including 4 MB integrated graphics 187500-001
*System board, Tualatin ready (replaces 187499-001) 239118-001
*System board, Tualatin ready (replaces 187500-001) 239117-001
Intel Celeron Microprocessor with fansink
*733/66 MHz 231588-001
*850/100 MHz 239115-001
Intel Pentium III Microprocessor with fansink
3600/66 MHz (use with 187500-001 & 239117-001) 194972-001
*667/133 MHz (use with 187500-001 & 239117-001) 194973-001
* 733/133 MHz 194974-001
* 800/133 MHz 194975-001
4 866/133 MHz 194976-001
* 933/133 MHz (use with 187499-001 & 269118-001) 201490-001
* 1 GHz (use with 187499-001 & 269118-001) 218317-001
* 1.13 GHz Tualatin (use with 239117-001 and
239118-001) 239112-001
* 1.20 GHz Tualatin (use with 239117-001 and
239118-001) 239113-001
Heatsinks
* 600 thru 933 MHz 228026-001
* 1.0 GHz 245262-001
* 1.13 GHz and greater 240763-001
5 Riser board 171489-001
6 Memory Module, 64 MB, 133 MHz 170080-001
* Memory Module, 128 MB, 133 MHz 170081-001
* Memory Module , 256 MB, 133 MHz 192014-001
7 Modem, 56K, PCI 157071-B21
* nVIDIA PCI Graphics controller, 32 MB 232245-001
* TNT2 Graphics, 16 MB SDRAM 179997-001
* NIC, 10/100 PCI 118042-001
*Not shown
Keyboards (not illustrated)
Easy Access, U.S. 123130-xxx
Spacesaver, Opal 269513-xxx
Basic Smart Card, U.S. 125790-xxx
Enhanced Smart Card, U.S. 125761-xxx
Arabic -171 International -B31
Belgian -181 Latin American Spanish -161
Brazilian Portuguese -201 Norwegian -191
BHCSY* -B41 Polish -B31
Czech -221 Portuguese -131
Danish -081 Russian -251
Dutch/Netherlands -B31 Slovakian -231
Finnish -351 Spanish -071
French -051 Swedish -101
French-Canadian -121 Swiss -111
German -041 Taiwanese -AB1
Greek -151 Thai -281
Hungarian -211 Turkish -141
Italian -061 United Kingdom -031
Japanese -191 U.S. -001
Korean (Hanguel) -AD1
*Bosnia-Herzegovinia, Croatia, Slovenia, and Yugoslavia
Miscellaneous Plastics (not illustrated)
Miscllaneous plastic kit, includes: 201489-001
Bezel blank (171991-001)
Foot, rubber (4 ea) (166932-001)
Documentation and Packaging (not illustrated)
Maintenance & Service Guide 201844-001
Service Reference Guide 225698-001
Quick Troubleshooting Guide 153837-001
Illustrated Parts Map 203723-001
Return kit 212545-001
b
© 2001 Compaq Computer Corporation.
Compaq and the Compaq logo are trademarks of Compaq
Information Technologies Group, L.P.
Intel, Celeron, and Pentium are trademarks of Intel
Corporation in the United States and other countries.
All other product names mentioned herein may be
trademarks of their respective companies.
Compaq shall not be liable for technical or editorial errors
or omissions contained herein. The information in this
document is provided “as is” without warranty of any kind
and is subject to change without notice. The warranties for
Compaq products are set forth in the express limited
warranty statements accompanying such products. Nothing
herein should be construed as constituting an additional
warranty.
August 2001
Part Number 203254-002
Spare Part Number 203723-001
Compaq Deskpro EN
Small Form Factor
Illustrated Parts Map

System Board Connectors and Jumpers (position of some untitled components may vary in location)
CR508 3.3V Aux LED P20 Primary IDE connector
CR570 5V Aux (ON)/PS_ON_(OFF) LED P21 Secondary IDE connector
E49 Password jumper (Installed = Enabled,
Removed = Cleared) P70 CPU fan connector
J30 Riser board P200 Hood lock solenoid connector
P1 Power supply connector SW50 Clear CMOS button
P6 Speaker connector XBT1 Battery
P7 CD-ROM audio XMM1-3 Memory sockets
P10 Diskette drive connector XU1 Processor socket
Riser Board Connectors and Jumpers
J20 PCI slot P12 NIC SOS connector
J21 PCI slot P29 SCSI LED connetor
J22 PCI slot SW1 Security hood switch
P7 CD audio connector
System Hardware Interrupts
IRQ System Function IRQ System Function
0Timer Interrupt 8 Real-Time Clock
1Keyboard 9 Unused
2Interrupt Controller Cascade 10 Unused, available for PCI
3Serial Port (COM B) 11 Unused, available for PCI
4Serial Port (COM A) 12 Mouse
5Unused, available for PCI 13 Coprocessor
6Diskette Drive 14 IDE interface hard drive
7Parallel Port (LPT 1) 15 CD-ROM
System Hardware DMA
DMA System Function DMA System Function
0 Unused 4 DMA Controller Cascading
1 Unused 5 Unused
2 Diskette Drive 6 Unused
3 ECP Parallel Port LPT1
(Default; Alternate = DMA 0) 7 Unused
ICH Fixed I/O Registers
Port Register Name
00h, 02h, 04h, 06h Channel 0, 1, 2, 3 DMA base and current address register
C0h, C4h, C8h, CCh Channel 4, 5, 6, 7 DMA base and current address register
01h, 03h, 05h, 07h Channel 0, 1, 2, 3 DMA base and current count register
C2h, C6h, Cah, CEh Channel 4, 5, 6, 7 DMA base and current count register
10h-1Fh Aliased at 00h-0Fh
20h Master PIC ICW1 Init. Cmd Word 1 register, Master PIC OCW2 Init. Cmd Word 2
register, and Master PIC OCW3 Init. Cmd Word 3 register
21h Master PIC OCW1 Init. Cmd Word 1 register, Master PIC ICW2 Init. Cmd Word 2
register, and Master PIC ICW3 Init. Cmd Word 3 register
24h,-25h, 28-29h, 2Ch-2Dh, 30h-
31h, 34h-35h, 38h-39h, 3Ch-3Dh Aliased at 20h-21h
40h Counter 0 interval time status byte format and Counter 0 counter access port regis-
ter
41h Counter 1 interval time status byte format and Counter 1 counter access port regis-
ter
42h Counter 2 interval time status byte format and Counter 2 counter access port regis-
ter
43h Timer control word register, Timer control word register read back, and Counter
latch command
50h-53h Aliased at 40h-43h
61h NMI status and control register
70h NMI enable registerand Real-time clock (Standard RAM) index register
ICH Fixed I/O Registers (Continued)
I/O Address (Hex) Register Name
71h Real-time clock (Standard RAM) target register
72h Extended RAM index register
73h Extended RAM target register
74h-75h Alaised at 70h-71h
76h-77h Aliased at 72h-73h or 70h-71h
81h, 82h, 83h Channel 2, 3, 1 DMA memory low page register
84h-86h, 88h Reserved page registers
89h, 8Ah, 8Bh Channel 6, 7, 5 DMA memory low page register
8Ch-8Eh Reserved page registers
8Fh Refresh low page register
91h-9Fh (except 92h) Aliased at 81h-8Fh
92h Fast A20 and INIT register
CF9h Reset control register
A0h Slave PIC ICW1 Init. cmd word 1 register, Slave PIC OCW2 Init. cmd word 2 reg-
ister, and Slave PIC 0CW3 Init. cmd word 3 register
A1 Slave PIC ICW2 Init. cmd word 2 register, Slave PIC ICW3 Init. cmd word 3 regis-
ter, Slave PIC ICW4 Init. cmd word 4 register, and Slave PIC OCW1 Init. cmd
word 1 register
A4h-A5h, A8h-A8h, ACh-ADh,
B0h-B1h, B4h-B5h, B8h-B9h,
BCh-Bdh
Aliased at A0h-A1h
B2h Advanced power management control port register
B3h Advanced power management status port register
C0h, C4h, C8h, CCh Channel 4, 5, 6, 7 DMA base and current address register
C1h Aliased at C0h
C5h Aliased atC4h
C9h Aliased at C8h
CDh Aliased at CCh
C2h, C6h, CAh, CEh Channel 4, 5, 6, 7 DMA base and current count register
C3h Aliased at C2h
C7h Aliased at C6h
CBh Aliased at CAh
CFh Aliased at Ceh
D0h Channel 4-7 DMA command register and status register
D1h Aliased at D0h
D4h Channel 4-7 DMA write single mask register
D5h Aliased at D4h
D6h Channel 4-7 DMA channel mode register
D7h Aliased at D6h
D8h Channel 4-7 DMA clear byte pointer register
D9h Aliased at D8h
DAh Channel 4-7 DMA master clear register
DBh Aliased at DAh
DCh Channel 4-7 DMA clear mask register
DEh Aliased at DCh
DEh Channel 4-7 DMA write all mask register
DFh Aliased at DEh
F0h Coprocessor error register
170h-177h PIO mode command block offset for secondary drive
1F0h-1F7h PIO mode command block offset for primary drive
376h PIO mode control block offset for secondary drive
3F6h PIO mode control block offset for primary drive
4D0h Master PIC edge/level triggered register
3F6h PIO mode control block offset for primary drive
4D1h Slave PIC edge/level triggered register
400-47F Super I/O
F800-F87F Reserved (power management)
FA00-FA3F Reserved (GPIO management)
FC00-FC0F Reserved (SMBUS controller)
NOTE: When the POS_DEC_EN bit is set, additional I/O ports get positively decoded by the ICH.
System Memory Map
Size Memory Address System Function
512 KB FFFFFFFFh to FFF80000h System ROM
3839 MB FFFBFFFFh to 10000000h PCI memory expansion
511 MB 0FFFFFFFh to 00100000h Host or PCI memory expansion
128 KB 000FFFFFh to 000E0000h System ROM
96 KB 000DFFFFh to 000C8000h PCI option ROMs
32 KB 000C7FFFh to 000C0000h Video ROM
128 KB 000BFFFFh to 000A0000h Video RAM
640 KB 0009FFFFh to 00000000h Base memory
Clearing CMOS*
The computer's configuration (CMOS) may occasionally be corrupted. If it is, it is necessary to clear the CMOS
memory using switch SW50.
To clear and reset the configuration, perform the following procedure:
1. Prepare the computer for disassembly.
ÄCAUTION: The power cord must be disconnected from the power source before pushing the Clear CMOS
Button (NOTE: All LEDs on the board should be OFF). Failure to do so may damage the system board
2. Remove the access panel.
3. Press the CMOS button located on the system board and keep it depressed for 5 seconds.
4. Replace the access panel.
5. Turn the computer on and run F10 Computer Setup (delete-utility) to reconfigure the system.
*When the CMOS button is pushed or the jumper is removed, both the power-on password and the setup password
become invalid because both are stored in the configuration memory. You will neet to reset the passwords.
Disabling or Clearing the Power-On and Setup Passwords*
1. Turn off the computer and any external devices, and disconnect the power cord from the power outlet.
2. Remove the access panel.
3. Locate the header and jumper labeled E49.
4. Remove the jumper from pins 1 and 2. Place the jumper over pin 2 only, in order to avoid losing it.
5. Replace the access panel.
6. Plug in the computer and turn on power. Allow the operating system to start.
NOTE: Placing the jumper on pin 2 clears the current passwords and disables the password features.
7. To re-enable the password features, repeat steps 1-3, then replace the jumper on pins 1 and 2.
8. Repeat steps 5-6, then establish new passwords.
Refer to the Computer Setup (F10 Setup) instructions to establish new passwords.
*When the CMOS button is pushed or the jumper is removed, both the power-on password and the setup password
become invalid because both are stored in the configuration memory. You will neet to reset the passwords.