Daewoo KOC-972T0S, Service Manual

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PRINTED WIRING BOARD
3. Display Problems
•
The display trouble shooting data
NO CA USE MEASUREME NT RESULT R EMEDY
1 P oor contact betw een
P.C .B . a nd d isplay
filam ent C heck the voltage of display pin 1 &
25 2.6 VA C Fix the pin 1 &
25 on the P.C .B .
2 T he display has som e
trouble in its segm ent or
grid R efer to T he display trouble
shooting data below Replace P.C .B .
assem bly
3 Loss vacuum in the
display F ind white spot Replace P.C .B .
assem bly
TROUBLE DIS PLA Y NAM E & PIN NO. MICO M O UTPUT IN PIN NO.
G rid 1 doesn’t com e on. G rid 1 (G 1), 4, 7 13
G rid 2 doesn’t com e on. G rid 2 (G 2), 10 16
G rid 3 doesn’t com e on. G rid 3 (G 3), 14 18
G rid 4 doesn’t com e on. G rid 4 (G 4), 17 17
G rid 5 doesn’t com e on. G rid 5 (G 5), 21 24
S egm ent a doesn’t com e on from G 1 to G 5 S egm ent a, 23 26
S egm ent b doesn’t com e on from G 1 to G 5 S egm ent b, 22 25
S egm ent c doesn’t com e on from G 1 to G 5 S egm ent c, 20 23
S egm ent d doesn’t com e on from G 1 to G 5 S egm ent d, 19 22
S egm ent e doesn’t com e on from G 1 to G 5 S egm ent e, 18 21
S egm ent f doesn’t com e on from G 1 to G 5 S egm ent f, 16 20
S egm ent g doesn’t com e on from G 1 to G 5 S egm ent g, 15 19
S egm ent h doesn’t com e on from G 1 to G 5 Low er bar h, 5 14
S egm ent i doesn’t com e on from G 1 to G 5 U pper bar i, 6,8,9,11 15