Repair
313221M
37
Replace Function Knob/Potentiometer
1.
See Before Beginning Repair, page 32. Relieve
pressure, page 21.
2.
Remove access cover (8) from back of control mod-
ule.
3.
Disconnect potentiometer wires from J2 on control
board (406). See F
IG
. 12.
4.
See F
IG
. 11. Remove two setscrews (416a) and pull
function knob (416) off potentiometer (404) shaft.
5.
Remove nut (N, part of 404) and detent plate (415).
6.
Install new potentiometer (404) in reverse order.
Position potentiometer so slot (S) is horizontal. Posi-
tion knob (416) so pointer (P) faces up. Install knob
on shaft so slot (S) engages alignment pin in knob.
Push knob onto shaft against detent spring before
tightening setscrews (416a).
7.
Reconnect potentiometer wires to J2 as shown in
F
IG
. 12.
F
IG
. 11. Control Module
405
416a
416
416a
415
417
406
407
408
412
411
410
409
*403
421
401
404
402
410*
TI6979a
424
*402
413
CS
FC
424
FC
CS
N
416a
416a
416
404
415
N
P
S
Detail of Function Knob/Potentiometer
TI7076a
Summary of Contents for 313221M
Page 59: ...Technical Data 313221M 59...