Maintenance & Service Guide
Presario 7900 Series Personal Computers
Models: 7922, 7930, 7935, 7940, 7947, 7950, 7970,
7973, 7985
Presario 7900 Models with K6-2 System
Board

Number |
Function |
Description |
Reference
Designator |
1 |
Diskette Drive |
34-pin |
FDD1 |
2 |
Primary IDE Drive |
40-pin |
IDE1 |
3 |
Secondary IDE Drive |
40-pin |
IDE2 |
4 |
Front I/O Panel |
10-pin |
USB2 |
5 |
Button Board |
20-pin |
J2 |
6 |
N/A |
|
|
7 |
Processor Bus Frequency Jumper |
4, 2-pin |
JP12-15 |
8 |
CMOS |
3-pin |
JP3 |
9 |
Battery Socket |
Battery holder |
BAT1 |
10-12,14 |
PCI Slots |
32-bit PCI connector |
PCI 1 to 4 |
13 |
CD Audio |
4-pin |
CD1 |
15 |
Fan |
3-pin |
Fan1 |
16 |
N/A |
|
|
17 |
Socket 7 |
321-pin PGA |
U6 |
18 |
Power Supply |
20-pin |
CN1 |
19 |
CPU Core Voltage Select |
5, 2-pin |
JP7-11 |
20 |
Clock Multiplier |
3, 2-pin |
JP4-6 |
21-23 |
DIMM Sockets |
168-pin DIMM |
DIMM 1 to 3 |
24 |
Mouse |
Miniature 6-pin |
PS1 (1/2) |
25 |
Keyboard |
Miniature 6-pin |
PS1 (1/2) |
26 |
Back USB |
Dual 4-pin |
USB1 |
27 |
Serial Port |
DSUB 9-pin |
Con1 |
28 |
Parallel Port |
DSUB 25-pin |
PJ1 |
29 |
VGA Connector |
DSUB 15-pin |
VGA1 |
30 |
Line Out |
Mini Stereo |
Game1D |
31 |
Line In |
Mini Stereo |
Game1B |
32 |
Microphone |
Mini Stereo |
Game1C |
33 |
Game Port |
DSUB 15-pin |
Game1A |
Jumper Settings
Jumper 3 |
CMOS Normal |
CMOS Clear |
pins 1-2 |
pins 2-3 |
Top
Jumpers 4-6 |
JP4 |
JP5 |
JP6 |
CPU/Host Ratio |
ON |
ON |
OFF |
2.5 |
OFF |
ON |
OFF |
3.0 |
ON |
OFF |
OFF |
2.0 |
OFF |
OFF |
OFF |
1.5/3.5 |
ON |
ON |
ON |
4.5 |
OFF |
ON |
ON |
5.0 |
ON |
OFF |
ON |
4.0 |
OFF |
OFF |
ON |
5.5 |
Top
Jumpers 7-11 |
JP11 |
JP10 |
JP9 |
JP8 |
JP7 |
VCC2 |
OFF |
OFF |
OFF |
OFF |
OFF |
0 |
OFF |
OFF |
OFF |
OFF |
ON |
2.1 |
OFF |
OFF |
OFF |
ON |
OFF |
2.2 |
OFF |
OFF |
OFF |
ON |
ON |
2.3 |
OFF |
OFF |
ON |
OFF |
OFF |
2.4 |
OFF |
OFF |
ON |
OFF |
ON |
2.5 |
OFF |
OFF |
ON |
ON |
OFF |
2.6 |
OFF |
OFF |
ON |
ON |
ON |
2.7 |
OFF |
ON |
OFF |
OFF |
OFF |
2.8 |
OFF |
ON |
OFF |
OFF |
ON |
2.9 |
OFF |
ON |
OFF |
ON |
OFF |
3.0 |
OFF |
ON |
OFF |
ON |
ON |
3.1 |
OFF |
ON |
ON |
OFF |
OFF |
3.2 |
OFF |
ON |
ON |
OFF |
ON |
3.3 |
OFF |
ON |
ON |
ON |
OFF |
3.4 |
OFF |
ON |
ON |
ON |
ON |
3.5 |
Top
Jumpers 12-15 |
JP12 |
JP13 |
JP14 |
JP15 |
CPU |
ON |
OFF |
OFF |
OFF |
66.6 |
OFF |
ON |
ON |
OFF |
95 |
OFF |
OFF |
ON |
OFF |
97 |
ON |
ON |
ON |
OFF |
100 |
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Jumpers
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