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TROUBLESHOOTING
IIOIS12 DC POWER TEST
I-E96-107-2N
6 - 3
2. Apply power to the IIOIS12/IIOIC12 by switching on the
line circuit breaker located at the front of the power entry
panel (PEP).
3. Use a digital voltmeter to measure the AC power at each of
the outlets (J1 through J3) on the PEP. The line voltage should
be 102-130 VAC RMS for a 120-VAC input and 204-250 VAC
for a 240-VAC input.
4. Use the digital voltmeter to check each outlet and insure
that neutral, live and ground are wired correctly, and there are
no ground faults.
5. Turn off the power to the IIOIS12. Verify that it removes
power from all outlets.
6. Plug the color monitor power cord and the computer power
cord into the AC sockets in the rear of the power entry panel.
DO NOT
plug in the power supply yet.
IIOIS12 DC POWER TEST
1. Turn the power off to the IIOIS12.
2. Unplug DC power distribution cables from all peripheral
devices (disk drives and keyboard interface module, if present).
Disconnect the power cables at the distribution side of the
cables.
NOTES:
1. Do NOT disconnect the power wiring from the multibus card cage.
2. Turn power off before removing or inserting multibus modules.
3. Unplug all four modules from the multibus card cage. The
modules do not have to be pulled all the way out. Pull them
out only a few inches from the module edge connectors.
4. Plug the power line cord for the power supply into the
power entry panel.
5. Ensure that ALL power supply wiring is correct.
NOTE: Check fuse in DC Power Supply.
6. Apply power to the IIOIS12.
7. Using a digital voltmeter, measure the DC voltages at the
multibus card cage. Refer to Figure
for the location to mea-
sure the backplane voltages.
Table
lists the DC voltage levels at the multibus card cage
backplane.