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3. Display Problems
NO
CA USE
1
P oor contact betw een
P.C.B . and display
filam ent
2
T he display has som e
trouble in its segm ent or
grid
3
Loss vacuum in the
display
• The display trouble shooting data
TROUBLE
G rid 1 doesn't com e on.
G rid 2 doesn't com e on.
G rid 3 doesn't com e on.
G rid 4 doesn't com e on.
G rid 5 doesn't com e on.
S egm ent a doesn't com e on from G 1 to G 5
S egm ent b doesn't com e on from G 1 to G 5
S egm ent c doesn't com e on from G 1 to G 5
S egm ent d doesn't com e on from G 1 to G 5
S egm ent e doesn't com e on from G 1 to G 5
S egm ent f doesn't com e on from G 1 to G 5
S egm ent g doesn't com e on from G 1 to G 5
S egm ent h doesn't com e on from G 1 to G 5
S egm ent i doesn't com e on from G 1 to G 5
MEASUREME NT
C heck the voltage of display pin 1 &
25
R efer to T he display trouble
shooting data below
F ind white spot
DIS PLA Y NAM E & PIN NO.
G rid 1 (G 1), 4, 7
G rid 2 (G 2), 10
G rid 3 (G 3), 14
G rid 4 (G 4), 17
G rid 5 (G 5), 21
S egm ent a, 23
S egm ent b, 22
S egm ent c, 20
S egm ent d, 19
S egm ent e, 18
S egm ent f, 16
S egm ent g, 15
Low er bar h, 5
U pper bar i, 6,8,9,11
31
PRINTED WIRING BOARD
RESULT
R EMEDY
2.6 VA C
Fix the pin 1 &
25 on the P.C .B .
Replace P.C .B .
assem bly
Replace P.C .B .
assem bly
MICO M O UTPUT IN PIN NO.
13
16
18
17
24
26
25
23
22
21
20
19
14
15
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