Adapted from HP Service Sheet “D”
WB0SMX
8640b Gear Set Replacement
A9A1 and A9A2 Removal
NOTE
For the following steps, orient the switch assembly with A9A1W1 and
A9A2W1 up.
Numbers in parentheses refer to items in the accompanying illustrated
parts breakdown.
6. Set both shafts fully ccw, and desolder the three wires attached to the
potentiometer terminals.
Summary of Contents for 8640b
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