GE C70 Instruction Manual page 478

10.2 BATTERIES
b) REPLACE BATTERY FOR SH/SL POWER SUPPLY
The power supply module contains the battery.
To replace the battery:
1. Turn off the power to the unit.
2. Wait a minimum of three minutes to ensure that there is no power to the battery.
3. As outlined in the previous section, open the unit by sliding up the plastic latch on the right side of the front panel (stan-
dard front panel) or unscrewing the panel (enhanced front panel).
4. For the standard front panel, it needs to be removed in order to access the power supply module, which is typically in
the first slot on the left side and blocked by the hinge of the front panel. To remove the front panel, unscrew the bracket
on the front left side of the unit.
5. Simultaneously pull the ejector clips at the top and bottom of the power supply module and remove the module.
6. Unscrew all four screws (not three) that attach the metal cover to the module.
7. Slide the metal cover away from the clips about 1 cm (1/4 inch) and remove the cover.
8. Unclip the black plastic holder that keeps the battery in place. The plastic clips into the socket at the bottom on both
sides. Use a flat-head screwdriver if you cannot unclip the plastic with your fingers.
9. Observe the + and - polarity of the battery and replace it with the same polarity as marked on the battery holder.
Replace the battery with the identical make and model. For example, do not use a rechargeable battery.
10. Reinstall the battery clip and the metal cover, and reinsert the power supply module into the unit.
11. Power on the unit.
12. Dispose of the old battery as outlined in the next section.
10
10-4
To avoid injury, ensure that the unit has been powered off for a minimum of three minutes
before replacing the battery.
Risk of fire if battery is replaced with incorrect type or polarity.
Figure 10–4: BATTERY LOCATION ON SH/SL POWER SUPPLY MODULE
C70 Capacitor Bank Protection and Control System
10 MAINTENANCE
GE Multilin