Compaq 4000N - Manual (Page 140)

Chapter 7 Power and Signal Distribution
Compaq Deskpro 4000N and 4000S Personal Computers
First Edition - September 1997
7-6
7.4 SIGNAL DISTRIBUTION
Figure 7-4 shows general signal distribution between the main subassemblies of the system unit.
NOTES:
[1] Deskpro 4000S only
[2] No cable used for interface; direct connection between PS assembly and system board.
CD Models only. An audio card must be added by the user if audio is desired.
Figure 7–4. Signal Distribution Diagram
System
Board
32-Bit PCI Bus
16-Bit ISA Bus
Riser Card
ISA Connector [1]
PCI Connector
+3.5, +/- 5,
+/- 12 VDC [2]
IDE I/F
IDE
Hard Drive
5, 12 VDC
Riser
Card
Conn
Power
Conn
IDE
Conn
IDE
Conn
IDE I/F CD-ROM
Keyboard
Mouse
Dsk.
Conn
Dsk I/F Diskette Drive
J4
P17
P20
P21
J1
J14
SW/LED
Conn
P16
Power On
HD Activity
PWR SW, PWR LED, HD LED
5, 12 VDC
5, 12 VDC
Mouse
Conn
Kybd
Conn
J13
Power
Supply
Assembly
Power Button