Control Data Corporation CYBER 180 810 Maintenance And Parts Manual page 113

BULK AUXILIARY POWER SUPPLY
Refer to figure
4-5,
find number 11 for location.
REMOVAL
1. Remove power from computer cabinet following Computer Cabinet Power
Down procedure.
WARNING
If backup battery option is installed,
make sure three cable connectors to the
battery packs are disconnected.
2. Detach circuit breaker's mounting assembly by removing its holding
screws.
NOTE
The bulk auxiliary power supply will
come out with its harness attached.
Hence, you must cut the tied wrap and
subsequently retie the harness when you
reinstall the supply.
3. Disconnect 3-position (red) connector from the battery control box
terminal J4.
4. Disconnect three molex connectors on bulk auxiliary power supply.
5. Disconnect the small molex connector on auxiliary power supply
regulator (figure 4-5, find number 10).
6. Disconnect red connector to power module blower.
7. Open the rear doors of the computer cabinet.
8. Locate the two logic column blower red connectors under blowers and
disconnect them.
9. Return to the bulk auxiliary power supply and remove ground screws on
the right side of ground plane.
10. Loosen three nuts from the left side of ground plane.
11. Slide out the bulk auxiliary power supply.
60469500 A
6--19