IBM H Series, Installation And Service Manual

Page: 311 / 438

Power Distribution Board
Attention: Note the disk bay positions of all disk drives in each bank before you
remove them from the drawer.
Removal
1. Place the drawer in the rear service position, as described in “Rear Service
Position” on page 7-28.
2. Remove the screws (one on each side near center) holding the central elec-
tronics complex (CEC) in position.
3. Slide the CEC back no more than 2 inches (50mm). To slide the CEC out more
may cause damage to some cables.
1P 2P 3P 4P 5P 6P 7P 8P/I 9P/I 1P 2P 3P 4P 5P 6P 7P 8P/I 9P/I
Screws Screws
H70
H50
1P 2P 3P 4P 5P 6P 7P 8P 1P 2P 3P 4P 5P 6P 7P 8P
Note: Do not replace the rear covers at this time.
4. Slide the drawer back into the rack unit.
5. Place the drawer in the front service position, as described in “Front Service
Position” on page 7-59.
6. Note the locations of the cables that attach to the power distribution board.
7. Disconnect the cables that attach to the power distribution board.
8. Remove the screws that hold the power distribution board in place.
Chapter 7. Removal and Replacement Procedures
7-57