IBM Magstar MP 3570 C Series, Maintenance Information

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MAPS
and continuity check the
cable. If it checks OK, do
not replace it.
037
Both the power supply fan and the drive fan
are rotating with power ON, but the drive
LEDs fail to switch ON.
Perform the following removal procedures:
1. “Decorative Cover—Drive-Only Models”
on page CARR-5.
2. “Drive Assembly Top Cover” on
page CARR-11.
3. “FID B2: Cooling Pack” on
page CARR-12.
You now have access to the power cable
going from the power supply to the mother
board. Also, refer to Figure 14 on
page MAPS-27 for a power diagram.
Unplug the power cable from mother board
at connector CD3, and switch power ON.
Check for the appropriate voltages at the
cable pins shown in the referenced figure.
Does power check OK at the cable end?
Yes No
038
Power is missing at the cable.
Replace the following FRUs in the
order listed.
| 1. Power supply (80%) “FID C1:
| Power Supply” on
| page CARR-16.
| 2. Power cable from the power
| supply to the Tape Drive. (20%)
| “FID DB: AC Switch and Cable
| Assembly” on page CARR-35.
At the completion of repairs, go to
“Verify Fix” on page PROC-7, then go
to “End of Call” on page PROC-12.
039
| Power to the mother board checks OK.
| Replace the Tape Drive. See “FID
| B3—Drive Pack, Library Models” on
| page CARR-7.
(Step 039 continues)
039 (continued)
At the completion of repairs, go to “Verify
Fix” on page PROC-7, then go to “End of
Call” on page PROC-12.
040
Drive LEDs switch ON and the power supply fan
rotates, but a power problem may still exist.
Does the drive pack fan rotate with power ON?
Yes No
041
Replace the following FRUs in the order
listed:
| 1. Drive cooling fan (80%) “FID BE: Drive
| Cooling Fan” on page CARR-12.
| 2. Power supply (15%) “FID C1: Power
| Supply” on page CARR-16.
| 3. Cable from the power supply to the
| drive pack fan (no FID) (5%).
Note: An alternative to replacement of
this cable is to disconnect both
ends and continuity check the
cable. If it checks OK, do not
replace it.
At the completion of repairs, go to “Verify
Fix” on page PROC-7, then go to “End of
Call” on page PROC-12.
042
The power supply appears to be OK, but there
may be an intermittent failure or a failure in the
cable from the power supply to the electronic
controls. Perform “Verify Fix” on page PROC-7
and if a failure occurs, restart into the MAPs from
the START section. If unable to get the failure to
occur, but the customer is getting failures, call the
support center.
MAPs
MAPS-17