Read Sharp LC-22AD1E (serv.man6) Service Manual online
17
LC-22AD1E
No pictur
e
No SCAR
T1
(A
V1) output
No SCAR
T2
(A
V2) output
No S-V
ideo
(A
V3) output
Chec
k all the settings microprocessor's adjust process men
u.
Is output at
pin (17) of
IC2521
nor
mal?
Chec
k the
IC2521 and
its
per
ipher
al
par
ts
.
Chec
k the
IC2522, A
V1
line (SC1-
OUT
-V) and
their
per
ipher
al
Is input at
pin(27) of
IC2521
nor
mal?
Chec
k the
A
V1 line
(SC1-IN-V)
and their
per
ipher
al
par
ts
.
Is output at
pin (13) of
IC2521
nor
mal?
Chec
k the
IC2521 and
its
per
ipher
al
par
ts
.
Chec
k the
IC2523,
(SC2-OUT
-V)
and their
per
ipher
al
par
ts
.
Is input at
pins (5) and
(7) of IC2521
nor
mal?
Chec
k the
(SC3-IN-Y)
line
, (SC3-
IN-C) line
and their
per
ipher
al
par
ts
.
No line
output
Is input at pin
(72) of IC801
nor
mal?
Chec
k the
(SY
-OUT)
line and
their
per
ipher
al
par
ts
.
Ye
s
No
Ye
s
No
Ye
s
Ye
s
No
No
Is input at pin
(73) of IC801
nor
mal?
Chec
k the
V
-P
AL line
and their
per
ipher
al
par
ts
.
No
No
No
TELETEXT
output
Is input at
pins (1), (2)
and (3) of
IC801
nor
mal?
Chec
k
IC801 and
its
per
ipher
al
par
ts
.
Ye
s
Is output at
pins (3), (5)
and (6) of
IC1630
nor
mal?
Ye
s
Is output at
pins (57) ~
(60) of
IC1601
nor
mal?
Chec
k the
its line
.
No
Ye
s
Is input at pin
(21) of
IC1601
nor
mal?
Chec
k
IC1601,
IC1604 and
their
per
ipher
al
par
ts
.
No
Ye
s
Chec
k the its
line
.
(RMD1/TXD1)
No
Is input at
pin(29) of
IC2521
nor
mal?
Chec
k the
A
V2 line
(SC2-IN-V)
and their
per
ipher
al
par
ts
.
Ye
s
No
TROUBLE SHOOTING TABLE (Continued)
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