Amana RFS Models, Service Manual

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26
Troubleshooting
Trouble 1: The following visual conditions indicate a probable failed control circuit.
1. Incomplete segments.
Z Segment missing.
Z Partial segment missing.
Z Digit \7%( (Note: Slight \7%( is normal.)
2. )*%%!7
3. A distinct change in the brightness of one or more numbers in display.
4. One or more digits in the display are not lighting.
5. Display indicates a number dif&%&%*,)U&%6U7"2)%,)y.
6. numbers (for example 7 or 9) will not display when 7" pad is touched.
7. ")*)44,!7(%*4,7%
8. Display obviously jumps in time while counting down.
9. "*)4&4,7(
10. >,)%(,)*%&%(7("
11. Display time of day does not reappear when 7( is ,)
CO N D I T I O N CHECK R ESULT C A USE R EMEDY
Everything works
Continuity.
No c ontinuity.
Sti ll have troub l e.
Defe c tive key
membrane
assemb
l y.
Defe c tive PCB
assemb l y.
Loose
c onne c tion.
Defe c tive PCB
assemb l y.
Rep l a c e key
membrane
assemb
l y.
Rep l a c e PCB
assemb l y.
Conne c t them
tight l y.
Rep l a c e PCB
assemb l y.
Rep l a c e key
membrane
assemb
l y and
c he c k operation.
Che c k the c onn-
e c tion between
membrane key
assemb l y and
PCB assemb l y.
2. Some inputs
c annot be
programmed.
1 . No input c an be
programmed.
3. Disp l ay shows a
num e
e
tou c hed.
4. Random
programming
when
tou c hing
other pads.
and c an not
a cc ept any
input.
2011 RFS Training Manual.indd 26 10/3/2011 8:36:48 AM