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Technical Reference Guide
Compaq Deskpro EN Series of Personal Computers
Desktop and Minitower Form Factors
Third Edition - September 1998
7-7
7.4 SIGNAL DISTRIBUTION
Figure 7-4 shows general signal distribution between the main subassemblies of the system unit.
NOTES:
[1] CDS models and minitowers. 3200 and 6400 models 4300 and 9100 models
[1] See Figure 7-5 for header pinout.
Figure 7–4
. Signal Distribution Diagram
System
Board
PCI Bus
ISA Bus
Backplane
Board
PCI
Slot
Power
Supply
Assembly
3.3, 5
12 VDC
IDE I/F
5, 12 VDC
Riser
Card
Conn
Power
Conn
Pri. IDE
Conn
Sec. IDE
Conn
IDE I/F
CD-ROM
Ke
y
board
Mouse
Dsk.
Conn
Dsk I/F
Diskette Drive
J50
P1
P20
P21
P10
CD Audio
5, 12 VDC
5, 12 VDC
Kybd/
Mouse
Conn
J6
IDE I/F
Fan Off
Audio
Conn
P7 [1]
CD
Audio
3/5/12
VDC
PS On
Fan/PS
Cntrl
Fan
Conn
P8 [1]
Chassis Fan
Fan Pwr
Spkr
Conn
P6
Audio
Chassis Spkr
Audio
Pwr Btn
Blk LED
PCI Bus
10/100
NIC
Card
WOL
Conn
P9 [1]
WOL
+5AUX
Fan Sens.
Dsk. I/F
WOL
LED
Conn
P5 [1]
Pwr On
HD Activity
Pwr/HD LEDs, Pwr Btn
Power On/Off
Hood Sw
AGP
Slot
Graphics
Card
AGP Bus
Wide Ultra
SCSI
Hard Drive
Wide Ultra SCSI
Controller Card
IDE
Hard Drive
PCI
Slot
PCI Bus
5,
12 VDC
LED
Conn
HD Activity
P29