NEC PowerMate VT 300i Series, Service And Reference Manual

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4-4 System Board
Locating System Board Jumpers
A – Power On Mode Jumper JP1 C – Clear CMOS Jumper JBAT1
B – Processor/Bus Speed Jumpers SW1 D – Wake-On LAN Jumper JWOL
Changing Processor Speed
To change processor speed, the system must be jumpered for the correct
processor/bus speed. Use the following steps to change the processor/bus speed
after installing an upgrade processor.
!
CAUTION
Jumpers are set correctly at the factory for the system
configuration. Only change (or check) the appropriate
jumper setting if upgrading the processor.
1.
Power off and unplug the system and any external options.
!
WARNING
System power must be off before changing a jumper setting.
2.
Remove the left side cover (see “Removing the Left Side Cover” in
Section 3).
3.
Locate jumper block SW1 on the system board.
4.
Use needle nose pliers to move the jumpers according to the settings shown
in the following figure.