LC-42D43U
4 – 5
<Composite video signal/S-video signal input> No video output (3)
No video output from external input <<INPUT-3>>
Select INPUT-3 and the input signal on the input switching menu
screen.
Is INPUT-3 selected on the input switching menu screen?
NO
When INPUT-3 cannot be selected since the characters INPUT-3
on the menu
YES
Is the video signal detection function normal? Check between
J501 and pin 2 of IC501.
Is the S-video signal detection function normal? Check between
J503 and pin 42 of IC501.
Is signal fed to each input terminal of IC501 (AV SWITCH)?
<Composite video signal input>
Is video signal fed to pin 3 of IC501?
NO
Check between J501 and pin 3 of IC501.
<S-video signal input>
Are Y and C signals fed to pins 5 and 7 of IC501 respectively?
NO
Check between J503 and pins 5 and 7 of IC501.
YES
<Composite video signal input>
Is video signal sent to pin 60 of IC501?
<S-video signal input>
Are Y and C signals sent to pins 60 and 59 of IC501 respec-
tively?
NO
Check IC501 (AV SWITCH) and peripheral circuits.
YES
<Composite video signal input>
Is video signal sent to pin 2 of TERMINAL_UNIT connector
(FC_SC501)?
<S-video signal input>
Are Y and C signals sent to pins 2 and 4 of TERMINAL_UNIT
connector (FC_SC501) respectively?
NO
Check between IC501 and SC501. (Q501, Q502, Q503, Q504,
etc.)
YES
<Composite video signal input>
Is video signal fed to pin 2 of MAIN_UNIT connector
(FC_SC1101)?
<S-video signal input>
Are Y and C signals fed to pins 2 and 4 of MAIN_UNIT connector
(FD_SC1101) respectively?
NO
Check the board-to-board cable “FC”.
YES
<Composite video signal input>
Is video signal fed to pin K25 of IC8101 (Broadcom) via L.P.F.
composed of Q2202 and Q2210?
<S-video signal input>
Are Y and C signals fed to pins k25 and L24 of IC8101 (Broad-
com) via L.P.F. composed of Q2202 and Q2210 and via L.P.F.
composed of Q2203 and Q2211 respectively?
NO
Check between SC1101 and IC3301. (Q2202, Q2210, etc.)/
(Q2203, Q2211, etc.)
YES
Are digital video (LVDS) signals sent from pins 37-42 and 45-48
of IC2602?
NO
Check IC2602 and peripheral circuits.
Are digital video (COMOS) signal sent from IC8101 (DVODATA 0
~ 23, DVOCLKO, DVODE, DVOHSYNC, DVOVSYNC)?
NO
Check IC8101 and peripheral circuits.
YES
Check LCD_CONTROL PWB.
Summary of Contents for Aquos LC-42D~43U
Page 5: ...LC 42D43U 1 1 LC 42D43U Service Manual CHAPTER 1 OPERATION MANUAL 1 SPECIFICATIONS ...
Page 6: ...LC 42D43U 1 2 2 OPERATION MANUAL ...
Page 7: ...LC 42D43U 1 3 ...
Page 8: ...LC 42D43U 1 4 ...
Page 9: ...LC 42D43U 1 5 ...
Page 10: ...LC 42D43U 1 6 ...
Page 11: ...LC 42D43U 1 7 ...
Page 12: ...LC 42D43U 1 8 3 DIMENSIONS ...
Page 33: ...LC 42D43U 3 2 30 80 80 1 CN2 IC1 7 QCNW G417WJQZ 14 12 CN7502 LA2 CN7501 LA1 ...
Page 36: ...LC 42D43U 3 5 MEMO ...
Page 38: ...LC 42D43U 4 2 2 SCHEMATIC DIAGRAM 1 2 3 4 5 6 7 9 10 8 J A B C D E F G H I MAIN Unit 1 ...
Page 39: ...LC 42D43U 4 3 11 13 12 14 15 16 18 19 17 ...
Page 40: ...LC 42D43U 4 4 1 2 3 4 5 6 7 9 10 8 J A B C D E F G H I MAIN Unit 2 ...
Page 41: ...LC 42D43U 4 5 11 13 12 14 15 16 18 19 17 ...
Page 42: ...LC 42D43U 4 6 1 2 3 4 5 6 7 9 10 8 J A B C D E F G H I MAIN Unit 3 ...
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Page 44: ...LC 42D43U 4 8 1 2 3 4 5 6 7 9 10 8 J A B C D E F G H I MAIN Unit 4 ...
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Page 58: ...LC 42D43U 4 22 1 2 3 4 5 6 7 9 10 8 J A B C D E F G H I MAIN Unit 11 ...
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Page 60: ...LC 42D43U 4 24 1 2 3 4 5 6 7 9 10 8 J A B C D E F G H I MAIN Unit 12 ...
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Page 68: ...LC 42D43U 4 32 1 2 3 4 5 6 7 9 10 8 J A B C D E F G H I MAIN Unit 16 ...
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Page 70: ...LC 42D43U 4 34 1 2 3 4 5 6 7 9 10 8 J A B C D E F G H I MAIN Unit 17 ...
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Page 74: ...LC 42D43U 4 38 1 2 3 4 5 6 7 9 10 8 J A B C D E F G H I MAIN Unit 19 ...
Page 75: ...LC 42D43U 4 39 11 13 12 14 15 16 18 19 17 ...
Page 76: ...LC 42D43U 4 40 AV TERMINAL Unit 1 2 ...
Page 77: ...LC 42D43U 4 41 ...
Page 78: ...LC 42D43U 4 42 AV TERMINAL Unit 2 2 ...
Page 79: ...LC 42D43U 4 43 ...
Page 80: ...LC 42D43U 4 44 MEMO ...
Page 104: ...LC 42D43U 24 7 PACKING PARTS S5 S4 S4 S3 S1 S2 S4 S4 S7 S6 ...