11
LC-12A2E
TROUBLE SHOOTING TABLE
No picture
at all
Yes
No
Are inputs
and outputs
of IC802 as
specified?
Chec
k all the settings on the microprocessor’
s adjust process men
u.
No picture
Chec
k IC802
and its
per
ipher
al
par
ts
.
Yes
No
Are inputs
and outputs
of IC1201 as
specified?
Chec
k
IC1201 and
its per
ipher
al
par
ts
.
Chec
k LCD
panel v
oltage
and
wav
e
fo
rm
.
No TV
and
VIDEO 1
output
Yes
No
Are inputs
and outputs
of IC402 as
specified?
Chec
k IC402
and its
per
ipher
al
par
ts
.
No
Is input at Pin
(73) of IC802
as specified?
Chec
k IC802,
A
V1 line and
their
per
ipher
al
par
ts
.
No TV
output
Yes
No
Are v
oltages
at Pins (6),
(7) and (9) of
tuner as
specified?
Chec
k the
po
w
er line
.
Yes
No
Is output at
Pin (19) of
tuner as
specified?
Chec
k the
tuner and its
per
ipher
al
par
ts
.
No
Is input at Pin
(1) of IC402
as specified?
Chec
k the
line in
question.
Yes
Chec
k IC402
and its
per
ipher
al
par
ts
.
Yes
No
Are Pins (2)
and (4) of
IC402 at
“H”
and “L
”
respectiv
ely?
Are Pins (65)
and (66) of
IC2001 at
“H”
and “L
”
respectiv
ely?
No VIDEO
1 output
Yes
No
Is input at Pin
(1) of IC402
as specified?
Chec
k the
line in
question.
Yes
No
Are Pins (2)
and (4) of
IC402 both at
“L
”?
No
No VIDEO
2 output
No
Is input at Pin
(74) of IC802
as specified?
Chec
k J3409,
A
V2 line and
their
per
ipher
al
par
ts
.
No S
VIDEO
output
No
Are inputs at
Pins (71) and
(72) of IC802
as specified?
Chec
k
SC3301, SY
line
, SC line
and
per
ipher
al
par
ts
.
No
COMPONENT
output
No
Is input at
Pins (4), (5),
(6) and (75)
of IC802 as
specified?
Chec
k J3404,
J3405, J3406,
D
VD-Y line
,
CB line
, CR
line and
per
ipher
al
par
ts
.
Are Pins (65)
and (66) of
IC2001 both
at “L
”?
Chec
k IC402
and its
per
ipher
al
par
ts
.
Yes
Yes
Yes
Yes
Chec
k the
line in
question.
Are data
signal at pins
(31)~(57) of
IC802 as
specified?
Chec
k data
signals at
pins (13),
(14) of IC802.
No
Are input and
output of
IC1201 as
specified?
Yes
Chec
k the
wire breaks
and the shor
t
of circuits of
IC802.
IC1201 and
its per
ipher
al
par
ts
.
Chec
k the
wire breaks
and the shor
t
of circuits of
IC1201 and
its per
ipher
al
par
ts
.
Yes
Chec
k the
line in
question.
Yes
Are input and
output of
IC1201 as
specified?
No
Are data
signals at
pins (31)~(57)
of IC802 as
specified?
No
No
Chec
k data
signals at
pins (13), (14)
of IC802.
Yes
Chec
k the
wire breaks
and the shor
t
of circuits of
IC802,
IC1201 and
its per
ipher
al
par
ts
.
Chec
k the
wire breaks
and the shor
t
of circuits of
IC1201 and
its per
ipher
al
par
ts
.
1
Yes
2
1
Yes
Are input and
output of
IC1201 as
specified?
No
Are data
signals at
pins (31)~(57)
of IC802 as
specified?
Chec
k data
signals at
pins (13), (14)
of IC802.
Yes
Chec
k IC802,
IC1201 and
its per
ipher
al
par
ts
.
Chec
k the
wire breaks
and the shor
t
of circuits of
IC1201 and
its per
ipher
al
par
ts
.
2
Summary of Contents for LC-12A2E
Page 5: ...5 LC 12A2E OUTLINE DIMENSION FIGURE Unit mm ...
Page 15: ...15 LC 12A2E A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 TERMINAL Unit SWITCH Unit R C Unit ...
Page 18: ...19 LC 12A2E Ë SWITCH and R C Unit A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 SCHEMATIC DIAGRAMS ...
Page 23: ...27 LC 12A2E Main Unit Side B A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 ...
Page 24: ...28 LC 12A2E A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 Terminal Unit Side A ...
Page 25: ...29 LC 12A2E A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 Terminal Unit Side B ...
Page 37: ...41 Ref No Part No Description Code Ref No Part No Description Code LC 12A2E ...
