LC-20B1U
25
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 20B1U
Page 31: ...17 16 19 18 15 14 13 12 11 10 LC 20B1U 31 INVERTER A UNIT INVERTER B UNIT ...
Page 35: ...LC 20B1U 35 6 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM ËCONTROL and RC LED Unit ...
Page 36: ...8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 20B1U 36 Ë DIGITAL Unit 1 5 ...
Page 37: ...17 16 19 18 15 14 13 12 11 10 LC 20B1U 37 ...
Page 38: ...8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 20B1U 38 Ë DIGITAL Unit 2 5 ...
Page 39: ...17 16 19 18 15 14 13 12 11 10 LC 20B1U 39 ...
Page 40: ...8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 20B1U 40 Ë DIGITAL Unit 3 5 ...
Page 41: ...17 16 19 18 15 14 13 12 11 10 LC 20B1U 41 ...
Page 42: ...8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 20B1U 42 Ë DIGITAL Unit 4 5 ...
Page 43: ...17 16 19 18 15 14 13 12 11 10 LC 20B1U 43 ...
Page 44: ...8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 20B1U 44 Ë DIGITAL Unit 5 5 ...
Page 45: ...17 16 19 18 15 14 13 12 11 10 LC 20B1U 45 ...
Page 46: ...8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 20B1U 46 Ë ANALOG Unit 1 2 ...
Page 47: ...17 16 19 18 15 14 13 12 11 10 LC 20B1U 47 ...
Page 48: ...8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 20B1U 48 Ë ANALOG Unit 2 2 ...
Page 49: ...17 16 19 18 15 14 13 12 11 10 LC 20B1U 49 ...
Page 50: ...LC 20B1U 50 6 5 4 3 2 1 A B C D E F G H Ë INVERTER A Unit ...
Page 51: ...LC 20B1U 51 6 5 4 3 2 1 A B C D E F G H Ë INVERTER B Unit ...
Page 53: ...LC 20B1U 53 6 5 4 3 2 1 A B C D E F G H CONTROL Unit Side B DIGITAL Unit Side B ...
Page 55: ...LC 20B1U 55 6 5 4 3 2 1 A B C D E F G H ANALOG Unit Side A ...
