Models 840/Sb3 Processor Tower (With Non-Dual Line Cords) - Ac Box (A01); Models 840/Sb3 Processor Tower (With Dual Line Cords) - Ac Box (A01, A03) - Concurrent Maintenance; Model 830 With Fc 9074, Model 840 With Fc 9079 Or Fc 8079 (With Dual Line Cords) - Ac Module (A01, A02) - IBM iSeries 270 Service Manual

Models 840/SB3 - Time of day (TOD) battery

Models 840/SB3 processor tower (with non-dual line cords) - AC box (A01)

For use by authorized service providers.
Use this procedure to remove or replace the AC box (A01) in a Model 840/SB3 processor tower (with
non-dual line cords).
To remove or replace the AC box (A01):
1. Power off the system. See Power on/off the system and logical partitions.
2. Disconnect the ac power cord.
3. Open the rear cover. See Models 840/SB3 - Covers.
4. Refer to Final assembly, rear - Models 840 and SB3 processor tower and perform the following steps.
a. Remove the screws that hold the AC box.
b. Remove the AC box.
5. Install the new AC box by reversing the removal procedure. After exchanging an item, go to Verify the
repair.
This ends the procedure.
Models 840/SB3 Processor Tower (with dual line cords) - AC box (A01, A03) -
concurrent maintenance
For use by authorized service providers.
Use this procedure to remove or replace the AC box (A01, A03) on the Models 840/SB3 Processor Tower
(with dual line cords)- using concurrent maintenance.
To remove or replace the AC box (A01, A03):
1. Swing open the lower rear cover. See Model 840/SB3 - Covers. Perform the following steps from the
rear of the system.
2. Disconnect the ac power cord for the AC box that you are working on.
3. Remove the four screws holding the AC box that you are working on in place. Refer to Final assembly,
rear - Models 840 and SB3 Processor Tower.
4. Remove the AC box.
5. Prior to installing the new AC box, verify that the LED on the concurrent maintenance adapter card is
on.
Is the LED on?
v Yes: Install the new AC box by reversing this procedure.
This ends the procedure.
v No: You must power down the system and replace the concurrent maintenance adapter card before
installing the new AC box.
a. Power off the system. This is no longer a concurrent maintenance operation. See Power on/off
the system and logical partitions.
b. Remove the two screws holding the concurrent maintenance adapter card in place.
c. Install the new concurrent maintenance adapter card and tighten the two screws.
d. Install the new AC box and tighten the four screws.
e. Power on the system.
This ends the procedure.
Model 830 with FC 9074, Model 840 with FC 9079 or FC 8079 (with dual line cords)
- AC module (A01, A02)
For use by authorized service providers.
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Hardware (Remove and Replace; Part Locations and Listings)