CONTROL UNIT KNOB REPLACEMENT.
MATERIALS/PARTS: Knob (frequency selector) PN SMB620191
Knob (squelch and control mode) PN SMC620189
Knob (volume control) PN FNA1836-126-440
Step given is typical for removal of all knobs.
Loosen two setscrews and remove knob.
Steps 1 and 2 apply to frequency selector knobs, step 3 applies to VOL control knob, and
steps 4 and 5 apply to squelch and mode control knobs.
Position knob (1) on shaft (2) and aline one of two setscrews (3) with flat (4) on switch shaft.
Tighten two setscrews (3).
Position knob (5) on switch shaft (6) and tighten two setscrews (7).
Position knob (8) on switch shaft (9) and aline side setscrew (10) with flat (11) on switch
5. Tighten side setscrew (10) and bottom setscrew (12).