Control Data Corporation CYBER 180 810 Maintenance And Parts Manual page 120

REPLACEMENT
1. Detach securing plate from faulty power supply by removing the two
holding screws and install plate onto new power supply.
2. Replace power supply by reversing removal procedure steps 5 through 10.
3.
Reconnect two terminal wires.
CAUTION
Make sure wire connections are red to +,
blue to -
4. Reconnect 15-position plug to the power supply.
5. Apply power to computer cabinet following Computer Cabinet Power Up
procedure.
6. Measure power output voltage at the bus bar to be sure it is within
range.
7.
Verify the power supply percent deviation on the meter assembly and
the corresponding power interface board.
DC TO DC OUTLET POWER SUPPLY
Refer to figure
4-5,
find number 15 for location.
TOOL REQUIRED
Voltmeter
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. Disconnect connector on the power supply.
3.
Measure the input V de to the power supply at terminals marked +
and - . Make sure voltage level is equal to zero or below 20 V de.
4. Remove two terminal wires and label them for replacement.
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