Daewoo KOR-971M0A Service Manual page 61

3) Display problems
NO. CAUSE
1 Poor contact between
P.C.B. and display filament.
2 Defective Display
3 Loss of vacuum in the
display
DISPLAY TOUBLE SHOOTING DATA
STAGE 1, LOCK don't come on.
STAGE 2, NO don't come on.
WEIGHT DEFROST, CUPS doesn't come on.
TIME DEFROST, OZ don't come on.
AUTO START, lb. don'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.
LOCK, NO, CUPS, g don't come on.
STAGE1, STAGE2, TIME DEFROST,
WEIGHT DEFROST, AUTO START 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 truntable motor do not rotate, but cook indicator in display comes on.
* Cause : RELAY "2" does not operate.
MEASUREMENT
Check the voltage
of PIN 1 & PIN 25.
Refer to "The display
trouble shooting data"
below.
TROUBLE
RY2
D10
RESULT
2.4 VAC
white spot White spot is
generated on
the display.
DISPLAY NAME
& PIN NO.
GRID 1 (G1), 21
GRID 1 (G2), 17
GRID 3 (G3), 9
GRID 4 (G4), 10
GRID 5 (G5), 4, 7
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
LOWER BAR i,
6, 8, 9, 11
Q5
R18 R15
+
A
EC4
-
-24v
59
REMEDY
Fix the PIN 1 & 25
on the P.C.B.
Replace P.C.B. assembly.
Replace P.C.B assembly.
MICOM OUTPUT
IN PIN NO.
30
29
26
28
27
39
40
41
36
37
38
42
33
34
R13
IC1
+ -
19
EC3
Q4