Control Data Corporation CYBER 180 810 Maintenance And Parts Manual page 116

4. Replace ac to de converter assembly to cabinet by following AC to DC
Convertor Assembly Replacement procedure steps 2 through 3.
5 KVA TRANSFORMER ·
Refer to figure
4-6
find number 22 for location. Transformer weighs more than
45 kg-(100 lb) so you should arrange to have help when performing this
procedure.
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. Open the back doors of the computer cabinet.
3. Detach the back cover of the power module by removing three holding
screws.
4. Disconnect yellow wires from terminal block and label them for
replacement.
5. Disconnect ground wire from the frame.
6. Remove two frame holding bolts from the transformer mounting plate.
7. Slide out transformer and mounting plate with help from other
personnel.
REPLACEMENT -
1. Remove faulty transformer from mounting plate and install new
transformer onto the mounting plate.
2. Replace transformer by reversing removal procedure steps 2 through 7.
3. Apply power to computer cabinet following Computer Cabinet Power Up
procedure.
6-22 60469500 A