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7. Checking the Interface C
7. Checking the Inte
7.1 Checking the
7.1 Checking the
C
C
o ntrol
ontrol
Ch eck
Ch
eck the horizontal sync signal on I308 pin 132
the horizontal sync signal on I308 pin 132
Process "8. Checki
Process "8. Checking the resol
7.2 Checking the
7.2 Checking the
C
C
ontrol
o ntrol
Ch
Ch eck
eck the vertical sync signal
the vertical sync signal on I308 p
Process "8. Checking the resolution change IC
Process "8. Checking the resolution change IC
rface Circuit of
ircuit of Sync S
Sync Signal
C
C
ircuit of
i rcuit of
H
H
o rizontal
orizontal
TTL level.
TTL level.
O O K K
ng the resoluti ution change
on change IC movem
IC movem ent"
section.
section.
C
C
i rcuit of
ircuit of
V
V
e rtical
ertical
on I308 pin 133 TT
in 133 TT L L
level.
level.
O O K K
movem
movem ent" sect
ent" section.
ion.
ignal
S
S
ync
y nc
P
P
u lse
ulse
N N G G
1) Video cable may have failed.
1) Video cable may have failed.
2) Print
2) Printed w
and I308
and
3) FB
3) FB 302, R307
ent"
S
S
ync
y nc
P
P
u lse
ulse
N N G G
1) Video cable may have failed.
1) Video cable may have failed.
2) Printed wire broke between
2) Printed wire broke between P30
and I308 8 pin 133.
and I30
3) FB302
3) FB302, R307
6 - 9
6 - 9
Failure point
Failure point
ed w ir ire broke betw
e broke between P
een P 301
301pin 13
pin 13
I308 pin 132
pin 132. .
302, R307open.
open.
Failure point
Failure point
P30 1 1 pin 14
pin 14
pin 133.
, R307open.
open.
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