Maintenance
and Service Guide
Compaq Presario 4900, 5000, & 5100
Series Computers
|
|
JUMPER
& SWITCH INFORMATION
5000
& 5100 Series System Boards (3rd board of 3)
For other boards used in the 5000
& 5100 series models, or for the board used in the 4900
series model, click the appropriate link.
Click on a jumper designator to get its function and a
connector description.
|
JP1 (CPU clock multiplier) |
| CPU
clock speed |
100 MHz bus |
200 |
250 |
300 |
350 |
400 |
450 |
500 |
550 |
| 95 MHz bus |
190 |
238 |
285 |
333 |
380 |
428 |
475 |
523 |
| pins 1-2 |
on |
on |
off |
off |
on |
on |
off |
off |
| pins 3-4 |
off |
on |
on |
off |
off |
on |
on |
off |
| pins 5-6 |
off |
off |
off |
off |
on |
on |
on |
on |
JCK3 (CPU bus speed select) |
| CPU bus speed (MHz) |
95 |
100 |
| Pins 1-2 |
on |
off |
The factory default settings of the following
jumpers are marked with an asterisk. These settings will not normally
need to be adjusted.
JCK1 (SDRAM clock source) |
| CMOS state |
CPU clock* |
AGP clock |
| Jumper position |
pins 1-2 |
pins 2-3 |
JCK2 (CPU bus clock select) |
| CMOS state |
66 MHz bus |
95 or 100 MHz bus* |
| Jumper position |
pins 1-2 |
pins 2-3 |
VS1 (CPU pin U33 voltage select) |
| U33 voltage |
3.3 V* |
3.45 V |
| Jumper position |
pins 1-2 |
pins 2-3 |
|
JP3 (CPU core
voltage select)
|
| VCC2H/L# low |
2.0 |
2.1 |
2.2* |
2.3 |
2.4 |
2.5 |
2.6 |
2.7 |
| VCC2H/L# high |
2.8 |
2.9 |
3.0 |
3.1 |
3.2 |
3.3 |
3.4 |
3.5 |
| pins 1-2 |
off |
on |
off |
on |
off |
on |
off |
on |
| pins 3-4 |
off |
off |
on |
on |
off |
off |
on |
on |
| pins 5-6 |
off |
off |
off |
off |
on |
on |
on |
on |
|
Connector information
| Function |
Description |
Reference Designator |
| Keyboard |
Miniature 6-pin |
½J1 |
| Mouse |
Miniature 6-pin |
½J1 |
| Parallel port |
DSUB 25-pin |
J4 |
| Serial port |
DSUB 15-pin |
J8 |
| Ethernet connector |
RJ45 |
J2 |
| Flat panel monitor connector |
20-pin DFPP |
J3 |
| Video |
15-pin VGA |
J5 |
| Microphone in |
Mini stereo |
½J7 |
| Speaker out |
Mini stereo |
½J6 |
| Line out |
Mini stereo |
½J7 |
| Line in |
Mini stereo |
½J6 |
| DIMM sockets |
168-pin DIMM |
DIMM 1 - 3 |
| SODIMM socket |
144-pin SODIMM |
J16 |
| Socket 7 |
321-pin PGA |
U25 |
| Socket 7 clock multiplier |
6-pin header |
JP1 |
| SDRAM clock source |
3-pin header |
JCK1 |
| CPU bus clock select |
3-pin header |
JCK2 |
| CPU bus speed select |
2-pin header |
JCK3 |
| Battery socket |
Battery holder |
BAT1 |
| Power supply |
6- and 12-pin ATPWR headers |
J15, J12 |
| PCI slots |
32-bit PCI connector |
J13, J14 |
| ISA slots |
16-bit ISA connector |
J9, J10 |
| CD-ROM audio |
4-pin header, key 2 |
J11 |
| IDE drives |
40-pin headers, key 20 |
J18, J19 |
| Diskette drive |
34-pin header |
J24 |
| Headphone board |
5-pin 2mm connector |
J22 |
| Internal speakers |
2-pin header |
J20, J21 |
| Game |
DSUB 15-pin |
J23 |
| CPU core voltage select |
6-pin header |
JP3 |
| Second fan |
4-pin header, key 2 |
J17 |
| CPU pin U33 voltage select |
3-pin header |
VS1 |
| CMOS clear |
3-pin header |
JP2 |
| Button board |
5-pin header |
J25 |
|
