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Over Current Isolation
Over Current Isolation
You are here because:
• An overcurrent condition has occurred on an output of one or both OCAs.
• You have been directed here by another Map (Map120).
This problem can be caused by any of the following:
• Any defective Off Line Converter (OCA).
• Any defective logic card.
• Any defective media device.
• Any defective logic board.
• Defective EPO Card Assembly.
• Any defective cable connecting the SBC card to the bidi Board.
• Defective cable connecting Floppy Drive to EPO Card Assembly.
DANGER
Service of any subassemblies under power outside of their machine frame mounts is
strictly prohibited.
1
Check the indicators labelled LOAD FL T on both
OCAs
Are the LOAD FL T indicators ON for BOTH OCAs?
NO
YES
~
Go to step 4.
2
On the OCA with the LOAD FL T off:
• Check the green indicator labelled PWR OUT.
Is the PWR OUT indicator on?
YES
NO
t
For the OCA with the LOAD FL T indicator
OFF, exchange the following FRU:
• OCA
When complete, continue on step 37.
190
Service Guide
For exchange procedures, see "OCA (Offline
Converter Assembly) Removal and Replacement"
on page 156.
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