IBM 5786, Процедуры снятия и замены

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9. Have you solved the problem?
No Remove all power from the disk subsystem, and call for assistance.
Yes Go to step “MAP 2410: 7031-D24 or 7031-T24 repair verification” on page 42 to verify the
repair.
MAP 2030: 7031-D24 or 7031-T24 power control
This MAP helps isolate FRUs that are causing a power problem that do not allow the 7031-D24 or
7031-T24 disk subsystem to power off when it should.
Attention: Do not remove power from the host system or the disk subsystem unless you are directed to
in the following procedures. Power cables and external SCSI cables that connect the disk subsystem to the
host system can be disconnected while that system is running.
You are here because power is still present at the disk subsystem although the host system is switched
off.
1. Observe the cards.
Does the disk subsystem remain powered on for more than 30 seconds after the last connected
system powers off?
No Go to “MAP 2410: 7031-D24 or 7031-T24 repair verification” on page 42 to verify the repair.
Yes Go to step 2.
2. Disconnect all SCSI cables and wait 30 seconds.
Is the disk subsystem still powered on?
No Go to step 3.
Yes Suspect an adapter problem in the host system.
3. Remove all SCSI initiator cards.
Is the disk subsystem still powered on?
No
a. Replug the SCSI interface cards one at a time to determine which one is bad.
b. If the disk subsystem powers on after replacing a SCSI interface card, replace that SCSI
interface card.
c.
Go to “MAP 2410: 7031-D24 or 7031-T24 repair verification” on page 42 to verify the
repair.
Yes Go to step 4.
4. Does the disk subsystem have two power supplies?
No
a. In the sequence shown, exchange the following FRUs for new FRUs:
1) Power supply assemblies
2) Frame assembly
b. Go to step 7 on page 41.
Yes
Go to step 5.
5. Do both power supplies have their DC PWR LEDs on?
No Go to step 6 on page 41.
Yes In the sequence shown, exchange the following FRUs for new FRUs. Ensure that for each FRU
exchange, you go to “MAP 2410: 7031-D24 or 7031-T24 repair verification” on page 42 to
verify the repair.
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Removal and replacement procedures