Remove and Replace
WFM90D and WFM91D ServiceManual 6-31
Bottom Cover Assembly
The bottom cover assembly containsreplaceable subparts. Procedures for
removing and installingthe subparts are included below.
Remove. Toremove the bottom cover:
1. Remove any installed batteries.R eferto Batteries on page 6--28.
2. Remove the six Torxscrews from the bottom cover.
3. Carefully removethe bottom cover and place it beside the top cover.
CAUTION. Toprevent damage to the battery-power wires soldered to the bottom
cover,carefully remove the bottom cover
4. Lift the Bottom board slightly out ofthe top cover so that you can pull the
battery-powerwires from jumper J21 of the Bottom board. See Figure 6--16.
Replace.To replace the bottom cover:
1. Lift the Bottom board slightly out ofthe top cover so that you can connect
the battery-powerwires onto jumper J21 of the Bottom board.
2. Carefully placethe bottom cover onto the top cover.
CAUTION. Toprevent damage to the battery-power or backlight wires, carefully
replacethe bottom cover. The bottom cover has slots in the molded plastic to
hold both the Backlight boardand Input board in place.
3. Install the six Torxscrews into the bottom cover.
4. Install your removedbatteries. Refer to Batteries on page 6--28.
Remove. Toremove the battery power connector:
1. Remove the bottom cover.Refer to Bottom Cover on page 6--31.
2. Unsolder the batteryconnector wires from the battery contacts.

Bottom Cover

Battery Power Connector