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Chapter 6: Replacing Assemblies
1680A,AD-series disassembly/assembly
To disassemble the front panel assembly
Remove the front panel circuit board.
1 Remove each of the knobs from the front panel.
2 Using a Torx T-10 screwdriver, remove five screws that secure the front
panel circuit board to the front panel.
3 Lift the front panel circuit board out of the front panel.
4 Lift the elastomeric keypad out of the front panel.
Remove the LCD display.
1 Using a Torx T-10 screwdriver, remove four screws, one in each corner,
that secures the LCD display to the front panel.
2 Lift the LCD display out of the front panel.
3 Lift the glass lens out of the front panel assembly.
NOTE: When installing, blow any dust off of the LCD and lens.
Remove the on/off switch.
1 Using a Torx T-10 screwdriver, remove two screws that secure the on-off
switch circuit board to the front panel.
2 Lift the on/off switch circuit board out of the front panel.
3 Lift the on/off switch out of the front panel.