Internal Assemblies - Top Case
4-34 Removal and Replacement
Lithium Backup Battery
The Lithium Battery maintains the unit’s stored information on the Control
PCA when the main battery is removed or depleted. A cable tie wrap and a
package of ProGold wipes are included in the Lithium Battery replacement
kit. Make sure that you clean the contact clips and new battery terminals with
a ProGold wipe and replace the cable tie wrap that holds the battery in place.
See Table 5-5 on page 5-11 for the replacement kit part number.
Preparation
1. Save the configuration.
If possible, save the customer’s configuration onto a Data Card (or print
the configuration) so the configuration can be restored after the repair is
complete.
2. Open the case safely.
See "Opening the Case" on page 4-24.
3. Disconnect and remove the Control PCA.
See "Control PCA" on page 4-36.
Removal
Remove the existing battery.
a. Using a pair of fine nose wire cutters, cut and remove the cable tie
wrap that holds the battery in place. See Figure 4-20 and Figure 4-21
for location.
b. Remove the battery from the holder.
Cleaning
a. Thoroughly clean the contact clips and new battery terminals with a
ProGold wipe.
Replacement
Install the new Lithium battery.
a. Insert the battery into the holder.
CAUTION Be sure to install the new battery with the correct orientation. Follow the
polarity markings on the bottom of the battery holder (under the battery).
b. Secure it in place with a new cable tie wrap.
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