Compaq Presario 5900T, Maintenance & Service Manual

Page: 57 / 71

United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
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Removal &
Replacement
Jumpers & Switches Specifications
Presario 7800 and 5900T Models with Pentium III
System Board
Jumper & Switch Information
Number Function Description
Reference
Designator
1
Secondary IDE
Drive
40-pin J13
2 Diskette Drive 34-pin J14
3 Primary IDE Drive 40-pin J12
4 Not used
5
Secondary fan
connector
J20
6 Button Board 20-pin J10
7 CMOS 3-pin JP1
8 Battery Socket
Battery
holder
BT1
9-13 PCI Slots
32-bit PCI
connector
PCI 1 to 5
14 AGP Slot Connector AGP1
15 Slot 1 321-pin PGA J18
16 Front side bus
four, 2-pin
jumpers
JP5-7*
17
Heat sink fan
connector
3-pin J15
18-20 DIMM Sockets
168-pin
DIMM
DIMM 1 to 3
21 IEEE 1394 10-pin JP3
22 Front I/O panel 10-pin JP4
23
Single front I/O
panel
30-pin J11**
24 Mouse
Miniature 6-
pin
J1
25 Keyboard
Miniature 6-
pin
J1
26 Back USB Dual 4-pin J2
27 Serial Port DSUB 9-pin J4
28 Parallel Port
DSUB 25-
pin
J21
29
IEEE 1394
Connector
6-pin J7
Fan 3-pin
Power Supply 20-pin J9
Clock Multiplier 3, 2-pin JP2
* JP7 always set to the ON position. JP5, JP6, and JP8 always set to the OFF position.
** Single front I/O panel and USB and IEEE1394 connectors are not used concurrently.
Jumper Settings
●
Clearing CMOS
●
Frequency Selection (JP2)
Clearing CMOS JP1
CMOS
Normal
CMOS Clear
pins 1-2 pins 2-3
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Frequency Selection (JP2)
Multiplier Pin (1-
2)
Pin (3-
4)
Pin (5-
6)
Pin (7-
8)
FSB 66
MHz
FSB
100
MHz
FSB
133
MHz
2 ON ON ON ON 133 200 266
3 ON OFF ON ON 200 300 400
4 OFF ON ON ON 266 400 533
5 OFF OFF ON ON 333 500 667
5/2 ON ON OFF ON 166 250 333
7/2 ON OFF OFF ON 233 350 466
9/2 OFF ON OFF ON 300 450 600
11/2 OFF OFF OFF ON 366 550 733
6 ON ON ON OFF 400 600 800
7 ON OFF ON OFF 466 700 933
8 OFF ON ON OFF 533 800 1066
Reserved OFF OFF OFF OFF *** *** ***
13/2 ON ON OFF OFF 433 650 866
15/2 ON OFF OFF OFF 500 750 1000
3/2 OFF ON OFF OFF 100 150 200
2 OFF OFF OFF OFF 133 200 266
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