Main Logic Board Jumpers; Celebris Pentium Main Logic Board Jumper Settings - Digital Equipment CELEBRIS Pentium PC Service Maintenance Manual

Digital CELEBRIS Pentium PC

Main Logic Board Jumpers

Jumper pins allow to set specific computer parameters. They are set by changing the pin location of
jumper blocks. Note that the square pin of each jumper block is pin 1. A jumper block is a small plastic-
encased conductor (shorting plug) that slips over the pins. To change a jumper setting, remove the jumper
from its current location. Place the jumper over the two pins designated for the desired setting. Press the
jumper evenly onto the pins. Be careful not to bend the pins.
CAUTION
Do not touch any electronic component unless you are safely grounded. Wear a
grounded wrist strap or touch an exposed metal part of the system box chassis. A
static discharge from your fingers can result in permanent damage to electronic
components.

CELEBRIS Pentium Main Logic Board Jumper Settings

Settings shown in bold italics are factory defaults.
Feature
Discharge
Password clear
Recovery mode
CPU clock
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Description
Normal
Clear CMOS
Password clear (MFG test)
Normal mode
Recovery mode
Normal
60 MHz
Service Procedures
Setting
J22, pins 1 and 2 jumpered
J22, pins 2 and 3 jumpered
J24, jumpered
J24, open
J25, jumpered
J25, open
J15, open
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