LC-20S4U-S
29
TROUBLE SHOOTING TABLE
(Continued)
No TV output
No TV, video 1 and 2 output
No video output at all
No component output
No S video output
No video 2 output
No video 1 output
Make sure the microprocessor's adjustment process menu settings are as specified.
Yes
No
No
Yes
No
Yes
Yes
No
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
No
Yes
Yes
Are the input
and output of
IC801 as
specified?
Check IC801
and its
peripheral
circuits.
Check the
LCD panel
voltage and
waveform.
Are the input
and output of
IC3402 as
specified?
Check
IC3402 and
its peripheral
circuits.
Is the input
at pin (93) of
IC7001 as
specified?
Is the output
at pin (89) of
IC7001 as
specified?
Check the
line in
question.
Check
IC7001 and
its peripheral
circuits.
Check the
line in
question.
Are the
voltages at
pins (6), (7)
and (9) Of
tuner as
specified?
Is the output
at pin (19) of
tuner as
specified?
Is the input
at pin (5) of
IC3402 as
specified?
Is the output
of IC3402 as
specified?
Check the
line in
question.
Check
IC3402 and
its peripheral
circuits.
Check the
line in
question.
Check the
tuner and its
peripheral
circuits.
Check the
power line.
Is the input
at pin (1) of
IC3402 as
specified?
Is the output
of IC3402 as
specified?
Check the
line in
question.
Check the
line in
question.
Check
IC3402 and
its peripheral
circuits.
Is the input
at pin (3) of
IC3402 as
specified?
Is the output
of IC3402 as
specified?
Check the
line in
question.
Check the
line in
question.
Check
IC3402 and
its peripheral
circuits.
Is the input
at pin (11) of
IC3406 as
specified?
Is the output
of IC3406 as
specified?
Check the
line in
question.
Check the
line in
question.
Check
IC3406 and
its peripheral
circuits.
Are the inputs at pins (21),
(33) and (44) of IC801 as
specified?
Check the D-Y, D-Pb and
D-Pr lines of J3405.
No video output
Summary of Contents for LC-20S4U-S - 20" LCD TV
Page 39: ...39 6 5 4 3 2 1 A B C D E F G H LC 20S4U S SCHEMATIC DIAGRAM Ë OPERATION Unit ...
Page 40: ...LC 20S4U S 8 7 10 9 6 5 4 3 2 1 A B C D E F G H 40 ËMAIN Unit 1 5 ...
Page 41: ...LC 20S4U S 41 17 16 19 18 15 14 13 12 11 10 ...
Page 42: ...LC 20S4U S 8 7 10 9 6 5 4 3 2 1 A B C D E F G H 42 ËMAIN Unit 2 5 ...
Page 43: ...LC 20S4U S 43 17 16 19 18 15 14 13 12 11 10 ...
Page 44: ...LC 20S4U S 8 7 10 9 6 5 4 3 2 1 A B C D E F G H 44 ËMAIN Unit 3 5 ...
Page 45: ...LC 20S4U S 45 17 16 19 18 15 14 13 12 11 10 ...
Page 46: ...LC 20S4U S 8 7 10 9 6 5 4 3 2 1 A B C D E F G H 46 ËMAIN Unit 4 5 ...
Page 47: ...LC 20S4U S 47 17 16 19 18 15 14 13 12 11 10 ...
Page 48: ...LC 20S4U S 8 7 10 9 6 5 4 3 2 1 A B C D E F G H 48 ËMAIN Unit 5 5 ...
Page 49: ...LC 20S4U S 49 17 16 19 18 15 14 13 12 11 10 ...
Page 50: ...LC 20S4U S 8 7 10 9 6 5 4 3 2 1 A B C D E F G H 50 ËANALOG Unit 1 4 ...
Page 51: ...LC 20S4U S 51 17 16 19 18 15 14 13 12 11 10 ...
Page 52: ...LC 20S4U S 8 7 10 9 6 5 4 3 2 1 A B C D E F G H 52 ËANALOG Unit 2 4 ...
Page 53: ...LC 20S4U S 53 17 16 19 18 15 14 13 12 11 10 ...
Page 54: ...LC 20S4U S 8 7 10 9 6 5 4 3 2 1 A B C D E F G H 54 ËANALOG Unit 3 4 ...
Page 55: ...LC 20S4U S 55 17 16 19 18 15 14 13 12 11 10 ...
Page 56: ...LC 20S4U S 8 7 10 9 6 5 4 3 2 1 A B C D E F G H 56 ËANALOG Unit 4 4 ...
Page 57: ...LC 20S4U S 57 17 16 19 18 15 14 13 12 11 10 ...
Page 58: ...58 6 5 4 3 2 1 A B C D E F G H LC 20S4U S ËR C LED Unit ...
Page 60: ...LC 20S4U S 8 7 10 9 6 5 4 3 2 1 A B C D E F G H 60 MAIN Unit Side A ...
Page 61: ...LC 20S4U S 61 17 16 19 18 15 14 13 12 11 10 ...
Page 64: ...LC 20S4U S 8 7 10 9 6 5 4 3 2 1 A B C D E F G H 64 MAIN Unit Side B ...
Page 65: ...LC 20S4U S 65 17 16 19 18 15 14 13 12 11 10 ...
Page 68: ...LC 20S4U S 8 7 10 9 6 5 4 3 2 1 A B C D E F G H 68 ANALOG Unit Side A ...
Page 69: ...LC 20S4U S 69 17 16 19 18 15 14 13 12 11 10 ...
Page 83: ...83 LC 20S4U S PACKING OF THE SET S1 S7 S5 S5 S5 S4 S5 S2 S3 X1 X2 X3 X4 X5 X6 X7 S6 ...