45
3) Display problems
The display trouble shooting data
4) When there is no microwave oscillation.
(1) When touching "START" pad, oven lamp does not turn on.
Fan motor and turnatable motor do not rotate, but cook indicator in display comes on.
* Cause: RELAY "2" does not operate.
DISPLAY NAME
MICOM OUTPUT
TROUBLE
& PIN NO.
IN PIN NO.
STAGE 1, LOCK don't come on.
Digit 1 (G1), 10
31
STAGE 2, NO don't come on.
Digit 2 (G2), 11
32
WEIGHT DEFROST, CUPS don't come on.
Digit 3 (G3), 14
30
TIME DEFROST doesn't come on.
Digit 4 (G4), 12
33
AUTO START, g don't come on.
Digit 5 (G5), 13
29
SEGMENT "a" doesn't come on from G1 to G5.
SEGMENT a, 7
20
SEGMENT "b" doesn't come on from G1 to G5.
SEGMENT b, 6
19
SEGMENT "c" doesn't come on from G1 to G5.
SEGMENT c, 5
18
SEGMENT "d" doesn't come on from G1 to G5.
SEGMENT d, 4
17
SEGMENT "e" doesn't come on from G1 to G5.
SEGMENT e, 3
16
SEGMENT "f" doesn't come on from G1 to G5.
SEGMENT f, 2
14
SEGMENT "g" doesn't come on from G1 to G5.
SEGMENT g, 1
13
LOCK, NO, CUPS, g don't come on.
LOWER BAR h, 9
15
STAGE1, STAGE2, TIME DEFROST, WEIGHT
UPPER BAR i, 8
21
DEFROST, AUTO START don't come on.
NO.
CAUSE
MEASUREMENT
RESULT
REMEDY
1
Defective Display
Refer to "The display
Replace P.C.B.
trouble shooting data"
assembly.
below.
i
d
h
b
c
g
eo
fo
e
f
a
G1
G2
G4
G5
G3
14
1
D9
1N4002A
+12V DC
RY2
G5B-12V
A
40
FAN RY
TRAY RY
IC1
Q11 KRC106M
Display layout
(Top View)
Q12 KRC 106M