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Maintenance & Service Guide
Presario 7900 Series Personal Computers
Models: 7922, 7930, 7935, 7940, 7947, 7950, 7970, 7973, 7985

MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications

Presario 7900 Models with K6-2 System Board

Jumper & Switch Information

ga2.jpg (182561 bytes)

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

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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

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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


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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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