LC-20S4U-S
28
TROUBLE SHOOTING TABLE
No
Yes
Yes
Yes
No
Yes
No
No
Yes
Yes
No
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
Check the load of
IC701 thru IC703
and their peripheral
circuits.
Are the output
voltages of IC701
thru IC703 as
specified?
Check the load side
of IC701 thru
IC703.
Is pin (10) of
IC701 thru IC703
at "H"?
Check the secondary
load of T701.
Is the primary oscillation
waveform of T701 as
specified?
Are the sec35V,
+9V, +5.3V, -12V and -
7V outputs of T701 as
specified?
Is DC12.5V applied at pins
(6) and (7) of T701 and pin
(8) of IC701 thru IC703?
Check the connections
between P3702 and
SC701 and their
peripheral circuits.
Check P3701 and its
peripheral circuits as well
as the built-In AC power
supply.
Is DC12.5V applied at to
F3701 and F3702?
Are F3701 and F3702 as
specified?
Replace F3701 and
F3702.
Check the primary side
of T701, and IC701 thru
IC703 and their
peripheral circuits.
Disconnect F3701 and
F3702. Is the load side
short-circuited?
Is pin (70) of IC2001
at "H"?
Check the line in
question, IC2001 and
its peripheral circuits.
Check the line in
question, IC801 and
its peripheral circuits.
Does pin (185) of IC801
oscillate? Is pin (187) of
IC801 at "H" or with
pulse signal?
Check the built-in AC
power unit, inverter unit
and fluorescent lamp,
and replace as required.
Check the primary
peripheral circuits and
secondary load of T701.
Check the
connections between
pin (19) of IC2001
and pin (3) of
P3701.
No video and audio output (no power supply)
Make sure the microprocessor's adjustment process menu settings are as specified.
Fluorescent lamp light-up failure
Содержание LC-20S4U-S - 20" LCD TV
Страница 39: ...39 6 5 4 3 2 1 A B C D E F G H LC 20S4U S SCHEMATIC DIAGRAM Ë OPERATION Unit ...
Страница 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 ...
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Страница 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 ...
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Страница 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 ...
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Страница 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 ...
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Страница 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 ...
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Страница 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 ...
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Страница 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 ...
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Страница 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 ...
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Страница 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 ...
Страница 57: ...LC 20S4U S 57 17 16 19 18 15 14 13 12 11 10 ...
Страница 58: ...58 6 5 4 3 2 1 A B C D E F G H LC 20S4U S ËR C LED Unit ...
Страница 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 ...
Страница 61: ...LC 20S4U S 61 17 16 19 18 15 14 13 12 11 10 ...
Страница 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 ...
Страница 65: ...LC 20S4U S 65 17 16 19 18 15 14 13 12 11 10 ...
Страница 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 ...
Страница 69: ...LC 20S4U S 69 17 16 19 18 15 14 13 12 11 10 ...
Страница 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 ...