Specifications

MDS 05-3438A01, Rev. E MDS 4790/9790 Series I/O Guide 83
Invisible place holder
Figure 38. Main Transceiver and Power Supply Removal
8.2 Installation & Removal of Backup Battery
(P/N 28-1575Axx)
To install the backup battery, follow these steps:
1. Make sure AC power is removed and the BATTERY BACKUP switch
is set to
OFF (see Figure 11).
2. Remove the 4 Phillips screws on each side of the chassis and remove
the top cover of the radio.
When handling the backup battery, be careful not to short the
terminals on the radio chassis. Doing so can cause damage to
the battery and cause personal injury.
3. Place the battery in the chassis in the area provided (see Figure 39)
and secure the battery clamp over the battery. The battery should be
a minimum rating of 4.5 A/H.
POWER SUPPLY
MAIN TRANSCEIVER
BOARD
DANGER
PERSONAL
INJURY
HAZARD