LC-20B1U
26
No picture and sound
Yes
No
Do F3701and F3702
function?
Chec
k all the settings on the microprocessor
’s adjust process men
u
.
No
Are secondar
y outputs
(+38V
, +9V
, +5V
, -8V
, -20V)
of
T3701 as specified?
Yes
Are the oscillation w
a
v
e
fo
rm
at T3701
’s pr
imar
y side as
specified?
Yes
No
Disconnect F3701and
F3702.
Is the load side
shor
t-circuited?
Yes
No
Is an
y of
T3701
’s pr
imar
y
side
, Q3700 and S4701 shor
t-
circuited?
Chec
k J3701, its per
ipher
a
l
par
ts and connection cab
le
.
Replace F3701 and F3702.
Chec
k S4701 and
connection cab
le
.
Chec
k the secondar
y-side
load of
T3701.
Fluorescent lamp
Yes
No
Does F6700, F6701,
F6702, F6703, and
F6704 function?
Yes
No
Is Pin (34) of IC1201 at
“H
”?
Yes
No
Are the oscillation w
a
v
e
fo
rm
s
at the pr
imar
y side of
T6700,
T6702, T6704, T6706,
and
T6708 as specified?
Yes
Replace F6700, F6701,
F6702, F6703, and F6704.
Yes
Chec
k the line
, IC1201 and
its per
ipher
al par
ts
.
Chec
k Q6700 - 6714,
T6700
- 6709 and their per
ipher
al
par
ts
.
Replace the fluorescent lamp
and chec
k the oscillation
w
a
v
e
fo
rm
again.
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 ...