Compaq 850 manual System Board Layout

Technical Reference Guide

2.3.3 BOARD LAYOUT

These systems use an ATX-type system board. Figure 2-5 shows the location of sockets, connectors, headers, switches, jumpers, and LEDs.

1	2	1	3	4	5	6	7	8	9
27
26
25
24
23
22	21	20	19	18	17		16

10

11

12

13

14

15

System Board (PCA# 010821)

Item	Description	Item	Description
1	PCI expansion bus slot connectors	15	Power supply connector
2	AGP slot connector	16	Secondary IDE connector
3	Auxiliary audio input header	17	Power/LED connector [1]
4	Chassis fan header	18	Primary IDE connector
5	Line In, HP/Line Out, Mic In connectors	19	Power supply on / 5V Aux power LED
6	USB ports (4)	20	Diskette drive connector
7	Top: Serial port B; Bottom: serial port A	21	CMOS clear button
8	Top: mouse connector, Bot.: Kybd conn.	22	Power button LED
9	Parallel port connector	23	Speaker connector
10	CD audio input header	24	Battery
11	CPU power connector	25	3.3V aux power LED
12	Processor socket	26	AOL/SOS header
13	Channel B RIMM sockets 3, 4	27	Password clear jumper [2]
14	Channel A RIMM sockets 1, 2	--	--

NOTE:

[1]Connector for power button, Power/HD LEDs, and SCSI HD LEDs.

[2]Jumper installed, password enabled. Jumper removed, password cleared.

Figure 2–5.System Board Layout

Compaq Deskpro EXS and Workstation 300 Personal Computers 2-7

Featuring the Intel Pentium 4 Processor

First Edition - December 2000