Models 830/Sb2 With Fc 9074 - Time Of Day (Tod) Battery - IBM iSeries 270 Service Manual

5. Remove the mounting screws from the EMC shield that is covering the processor/CEC cage
assembly.
6. Remove the EMC shield.
7. Remove the mounting screws from the processor/CEC cage assembly.
8. Remove the EMC access plate that is located directly above the PCI cage (CB1).
9. Reach under the processor/CEC cage assembly and remove the internal (copper) HSL cable and the
three ribbon cables from the system unit backplane.
10. Reach under the processor/CEC cage assembly and loosen the thumbscrew on the interlock plate.
11. Pivot the interlock plate downward.
12. Grasp the handle bar on the processor/CEC cage and pull the drawer out until it stops.
13. Remove the screws from the air baffle that is located in the center and remove it from the cage.
14. Label and remove the M01 - processor regulator card, M02 and M05 - memory riser cards, M03 and
M04 - processors, and the M06 - Network interface controller (NIC) card from inside the
processor/CEC cage. For location information, refer to Locations — Models 830, SB2 system unit
with FC 9074 base I/O tower. The associated table will direct you to the remove and replace
procedures.
15. Remove the mounting screws that are holding the processor/CEC cage assembly to the rails.
16. Lift the processor/CEC cage assembly from the rails.
17. Remove the mounting screws that hold the backplane to the sheet metal cage.
18. Disconnect the cable carrier from the sheet metal cage (snip the mounting dart).
19. Rotate the lever handles that hold the processors in place to the closed (downward) position and
separate the sheet metal cage from the backplane by lifting it up and off of the board.
20. Install the new system unit backplane by reversing the remove procedure. After exchanging an item,
go to Verify the repair.
This ends the procedure.

Models 830/SB2 with FC 9074 - Time of day (TOD) battery

For use by authorized service providers.
Use this procedure to remove or replace the time of day (TOD) battery in the Models 830/SB2 with FC
9074. The TOD battery is located in the FC 9074 base I/O tower.
CAUTION:
This product contains a lithium battery. To avoid possible explosion, do no burn, exchange, or
charge the battery. Discard the battery as instructed by local regulations for lithium batteries.
(RSFTC232)
To remove or replace the time of day battery:
1. Power off the expansion tower. See Power on/off the system and logical partitions.
2. Remove the power cord from the base I/O tower.
3. Open the rear cover. See FC 5074, FC 5079, FC 5094, FC 5294, FC 9079, FC 9094 - Covers.
4. From the rear of the expansion tower do the following:
a. Remove the EMC access plate that is located directly above the PCI card enclosure. Press the
surfaces of the two latching mechanisms together and tilt the top of the cover away from the frame
to remove it.
b. Remove the cables from the top of the PCI cards and note their locations.
Attention: All cards are sensitive to electrostatic discharge (see Work with electrostatic
discharge-sensitive parts).
c. Remove the screws that hold the PCI card enclosure to the frame.
Analyze hardware problems
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