Use this procedure to remove or replace the AC module (A01, A02) on the Model 830 with FC 9074, or
Model 840 with FC 9079 or FC 8079 (with dual line cords).
To remove or replace the AC module (A01, A02):
1. Do not power down the tower if it is powered on. This procedure can be done concurrently.
2. Open the rear cover. See Models 830/SB2 with FC 9074 - Covers or Models 840/SB3 - Covers,
depending on the model that you are working on.
3. See Locations and addresses for the tower that you are working on.
4. Trace and disconnect the ac input line cord that connects to the AC module that needs replacing.
Attention: Do not disconnect the other system ac line cord when powered on.
5. Disconnect the power supply jumper cords from the AC module that you are working on.
Attention: Do not disconnect the other system AC module power supply jumper cords.
6. Remove the top and bottom screws that hold the AC module to the frame.
7. Remove the AC module unit.
8. Install the AC module 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) - concurrent maintenance
adapter card (A02)
For use by authorized service providers.
Use this procedure to remove or replace the concurrent maintenance adapter card (A02) on a Model
840/SB3 processor tower.
To remove or replace the concurrent maintenance adapter card (A02):
1. Power down the system. This is no longer a concurrent maintenance operation.
2. Remove the two screws holding the concurrent maintenance adapter card in place. Refer to Final
assembly, rear - Models 840 and SB3 Processor Tower.
3. Install the new concurrent maintenance adapter card and tighten the two screws.
4. Power on the system.
This
ends the procedure.
Models 840/SB3 processor tower - Air moving device (B01, B02, B03, and B04)
For use by authorized service providers.
Use this procedure to remove or replace the air moving device (AMD) - (B01, B02, B03, and B04) in the
Models 840/SB3 processor tower.
To remove or replace Air moving device (B01, B02, B03, and B04):
1. Do not power off the system.
2. Open the front or rear cover depending on the location of the AMD that you are replacing. See Models
840/SB3 - Covers.
3. Refer to Final assembly, front - Models 840 and SB3 processor tower or Final assembly, rear - Models
840 and SB3 processor tower and perform the following steps.
4. Remove the EMC access plate.
5. Perform the following on the control panel:
a. Select function 7 on the system control panel. Press Enter (07** will be displayed).
b. Use the arrow keys to increment/decrement to sub-function A2 (07A2 will be displayed). Press
Enter (07A2 00 will be displayed).
Analyze hardware problems 75
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