IBM iSeries Series Hardware Problem Analysis And Isolation page 70

b. Use a multimeter to measure the DC voltage at the battery charger unit outlets or ac voltage at
the AC module and power distribution unit to the power supplies.
Is the DC voltage from 145 V dc to 259 V dc for the battery charger unit or 200 V ac to 240 V ac for
dual line cord units and power distribution units?
No: Exchange the following (as installed):
v
– Battery charger unit (see symbolic FRU "BATCHGR" on page 285
– AC module (see Type, model, and part number list)
– Power distribution unit
This ends the procedure.
Yes: Continue with the next step.
v
12. DANGER
Dangerous voltage being measured. (RSFTD005)
Perform the following:
a. Connect the ac power jumper cables to the AC module, battery charger unit, or power distribution
unit.
b. Disconnect the ac power jumper cable at the power supplies.
c. Use a multimeter to measure the DC voltage of the power jumper cables input to the power
supplies.
Is the DC voltage from 145 V dc to 259 V dc (200 V ac to 240 V ac for dual line cord units and power
distribution units) for each power jumper cable?
No: Exchange the power jumper cable.
v
This ends the procedure.
v Yes: Continue with the next step.
13. Exchange the following parts one at a time.
SPCN card unit (see symbolic FRU "TWRCARD" on page 470).
v
Display unit (see symbolic FRU "CTLPNL" on page 323).
v
Power supply (see Type, model, and part number list), with a new unit, replace one of the power
v
supplies 1, 2, or 3 until the failing unit is found.
This ends the procedure.
14. Perform the following:
a. Disconnect the mainline ac power cable from the customer's ac power outlet.
b. Exchange one of the following FRUs:
SPCN card (see symbolic FRU "TWRCARD" on page 470)
v
Power supply (see Type, model, and part number list)
v
System unit card enclosure
v
c. Reconnect the mainline ac power cables to the power outlet.
d. Attempt to power on the system.
e. If the system powers on, the FRU you exchanged is the failing item. If the system does not
power on, repeat this step, exchanging the next FRU in the list.
f. If the system does not power on after exchanging all the FRUs in the list, ask your next level of
support for assistance.
This ends the procedure.
15. Is there an SRC displayed on the control panel for the unit that does not power on?
No: Replace the SPCN card (see symbolic FRU "TWRCARD" on page 470)
v
This ends the procedure.
Yes: Continue with the next step.
v
58
iSeries: iSeries Server 270, 800, 810, 820, 825, 830, 840, 870, 890, SB2, and SB3 Hardware Problem Analysis and Isolation