IBM 3746-900, Installation And Maintenance Manual

Page: 148 / 264

Battery Exchange
Safety
See Appendix A, “Safety Information” on page A-1.
1. Locate the battery on the board (see “System Board Layout” on page H-5 for
details).
2. Note the orientation of the battery on the system board and remove it.
3. Install the new battery.
4. Reinstall Service Processor cover.
5. Go to “After FRU Exchange” on page 5-9.
Board Exchange
A new system board comes without microprocessor, no memory options on it. You
must transfer all such components from the system board being removed.
Note: Be sure to have read “Before Replacing a System Board” on page 3-22 and
“Asset EEPROM Backup” on page 4-7.
Remove the system board using the following steps:
| 1. Remove the Service Processor top cover (see “Cover Removal” on page H-2
| for details).
2. Remove the token-ring adapter card (Slot 4).
3. Remove the plastic cover of the processor.
4. Remove the diskette and hard disk drive (see “Diskette / Hard Drive Removal”
on page H-3 for details).
5. Remove the cable connectors coming from diskette, disk, CD-ROM, fan, and
panel.
6. Remove the seven screws that secure the board (see Figure 5-1 on page 5-5).
5-4
3745-XXA 5-4 3746-9X0: 6578 SPIM