Daewoo KOC-870T0S, Service Manual, Page: 34 / 43

33
3) Display problems
The display trouble shooting data.
NO CAUSE
1 Poor contact between P.C.B.
and display filament.
2 The display has some trouble
in its segment or gril.
3 Loss vacumm in the display.
MEASUREMENT
Check the voltage of display pin
1 & 25
Refer to “The display trouble shooting
data” below
Find white spot.
RESULT REMEDY
2.6VAC Fix the pin 1 & 25 on
the P.C.B.
Replace P.C.B.
assembly.
Replace P.C.B.
assembly.
DISPLAY NAME & PIN NO.
Grid 1 (G1), 21
Grid 2 (G2), 17
Grid 3 (G3), 14
Grid 4 (G4), 10
Grid 5 (G5), 4,7
Segment a, 23
Segment b, 22
Segment c, 20
Segment d, 19
Segment e, 18
Segment f, 16
Segment g, 15
Lower bar h, 5
Upper bar i 6, 8, 9 ,11
MICOM OUTPUT IN PIN NO.
24
17
18
16
13
26
25
23
22
21
20
19
14
15
TROUBLE
M/W & AUTO COOK don’t come on.
GRILL & PIE don’t come on.
COMBI & TEMP COOK don’t come on.
WEIGHT DEFROST & Kg don’t come on.
TIME DEFROST 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.
Segment “h” doesn’t come on from G1 to G5.
Segment “i” doesn’t come on from G1 to G5.