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3) Display problems
NO.
CAUSE
1
Poor contact between
P .C.B. and display
filament.
2
Defective Display
3
Loss of vaccum in
the display.
The display trouble shooting data
DEFROST does't come on.
COOK doesn't come on.
SEGMENT "a" doesn't come on from G1 to G5.
SEGMENT "b" doesn't come on from G1 to G5.
SEGMENT "c" doesn't come on from G1 to G5.
SEGMENT "d" doesn't come on from G1 to G5.
SEGMENT "e" doesn't come on from G1 to G5.
SEGMENT "f" doesn't come on from G1 to G5.
SEGMENT "g" doesn't come on from G1 to G5.
DEFROST, COOK don't come on.
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.
RY2
RELAY "2"
MEASUREMENT
Check the voltage
of PIN 1 & PIN 25.
Refer to "The display
trouble shooting data"
below.
TROUBLE
D10
A
RESULT
2.4 VAC
white spot
White
spot is
generated
on the
display
DISPLAY NAME
& PIN NO.
GRID 2 (G2), 17
GRID 4 (G4), 10
SEGMENT d, 19
SEGMENT e, 18
SEGMENT f, 16
SEGMENT a, 23
SEGMENT b, 22
SEGMENT c, 20
SEGMENT g, 15
UPPER BAR h, 5
Q5
R15
R18
+
EC4
-
-24V
REMEDY
Fix the PIN 1 & 25
Replace P .C.B.
assembly.
Replace P .C.B.
assembly
MICOM OUTPUT
IN PIN NO.
R13
IC1
+
-
19
EC3
Q4
29
28
39
40
41
36
37
38
42
33
44
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