Adapted from HP Service Sheet “D”
WB0SMX
8640b Gear Set Replacement
d. Set the rear, 4-contact rotor with contacts aligned vertically and
pointing toward the top of the switch. This adjustment is made by
loosening the set screws on the combination gear (13) to reset the rotor
position.
e. FM Deviation and Counter lights must be vertical after A9 is
reassembled.
Summary of Contents for 8640b
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