Voltage Regulator Card (Model 39H) - IBM 7012 300 Series Installation And Service Manual

Voltage Regulator Card (Model 39H)

Note: Refer to "Handling Static-Sensitive Devices" on page 3-2 before removing or
Removal
1. Set the power switches of the attached devices to Off.
2. Set the power switch of the system unit to Off.
3. Set the key mode switch to the Service position.
4. Remove the top cover by loosening the two thumbscrews located on the back of the
system unit. Slide the cover to the rear of the system unit and lift it straight up.
5. Remove the CPU support bracket.
6. Pull up on the CPU card and the voltage regulator card at the same time.
7. Unplug the voltage regulator card from the CPU card.
8. Remove the voltage regulator card from its slot.
CPU Support Bracket
Voltage
Regulator
Card
Replacement
1. Plug the voltage regulator card into the CPU card.
2. Align the voltage regulator card and the CPU card with the card guides and the card
connectors, and then press the voltage regulator card and the CPU card down into the
connectors.
3. Replace the CPU support bracket.
4. Replace the top cover.
5. Set the power switch of the system unit to On.
6. Set the power switches of the attached devices to On.
installing the CPU card in this system.
CPU Card
Removal and Replacement Procedures
3-33