27
LC-20E1U
LC-20E1UB/UW
TROUBLE SHOOTING TABLE
(Continued)
Chec
k all the settings on the microprocessor
’s adjust process men
u.
No picture
No picture
at all
Yes
No
Are inputs
and outputs
of IC801 as
specified?
Does the LCD
controller test
patter
n
appear?
Does the
video decoder
test patter
n
appear?
Chec
k IC402
and its
per
ipher
al
par
ts
.
Chec
k
IC1201, its
per
ipher
al
circuits and
the LCD
panel.
Chec
k IC801
and its
per
ipher
al
circuits
.
Yes
No
No
No VIDEO
1 or 2
output
Yes
No
Are inputs
and outputs
of IC402 as
specified?
Chec
k IC402
and its
per
ipher
al
par
ts
.
Chec
k
IC7001 and
its per
ipher
a
l
par
ts
.
No
Is input at Pin
(73) of IC801
as specified?
Chec
k
IC801,
A
V1 line and
their
per
ipher
al
par
ts
.
Yes
No
Are input and
output of
IC7001 as
specified?
Chec
k
IC7202 and
its per
ipher
a
l
par
ts
.
Yes
No
Are input and
output of
IC7202 as
specified?
No
Are pin
(67) of
IC2001
at
“H
”?
No S
VIDEO
output
Yes
Yes
Are pins (2)
and (12) of
IC7101 60th
at
“H
”?
No
Are inputs at
Pins (71) and
(72) of IC801
as specified?
Chec
k
SC3405, SY
line
, SC line
and per
ipher
al
par
ts
.
No
COMPONENT
output
No
Is input at
Pins (4), (5),
(6) and (75)
of IC801 as
specified?
Chec
k J3404,
D
VD-Y line
,
PB line
, PR
line and
per
ipher
al
par
ts
.
No TV
output
Yes
No
Are v
o
ltages
at Pins (6),
(7) and (9) of
tuner as
specified?
Chec
k the
po
w
e
r 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
(3) 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?
Yes
Chec
k the
line in
question.
Chec
k pin
(88) of
IC2001 or the
SSW line
.
Summary of Contents for Aquos LC 20E1U
Page 32: ...35 34 LC 20E1U LC 20E1UB UW 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H OVERALL WIRING DIAGRAM ...
Page 35: ...39 38 LC 20E1U LC 20E1UB UW 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H Ë DIGITAL Unit 1 5 ...
Page 36: ...41 40 LC 20E1U LC 20E1UB UW 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H Ë DIGITAL Unit 2 5 ...
Page 37: ...43 42 LC 20E1U LC 20E1UB UW 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H Ë DIGITAL Unit 3 5 ...
Page 38: ...45 44 LC 20E1U LC 20E1UB UW 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H Ë DIGITAL Unit 4 5 ...
Page 39: ...47 46 LC 20E1U LC 20E1UB UW 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H Ë DIGITAL Unit 5 5 ...
Page 40: ...49 48 LC 20E1U LC 20E1UB UW 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H Ë ANALOG Unit 1 2 ...
Page 41: ...51 50 LC 20E1U LC 20E1UB UW 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H Ë ANALOG Unit 2 2 ...
Page 42: ...52 6 5 4 3 2 1 A B C D E F G H LC 20E1U LC 20E1UB UW Ë INVERTER A Unit ...
Page 43: ...53 6 5 4 3 2 1 A B C D E F G H LC 20E1U LC 20E1UB UW Ë INVERTER B Unit ...
Page 46: ...56 6 5 4 3 2 1 A B C D E F G H LC 20E1U LC 20E1UB UW DIGITAL Unit Side B ...
Page 49: ...59 6 5 4 3 2 1 A B C D E F G H LC 20E1U LC 20E1UB UW ANALOG Unit Side A ...
Page 51: ...62 6 5 4 3 2 1 A B C D E F G H LC 20E1U LC 20E1UB UW INVERTER A Unit Side A ...
Page 53: ...64 6 5 4 3 2 1 A B C D E F G H LC 20E1U LC 20E1UB UW INVERTER B Unit Side A ...
