Sharp AQUOS LC-42LE40E, Руководство по обслуживанию

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LC-32LE40E-LC-42LE40E
46
No picture on the display (3)
↓
Does not the picture come out when TV is received?
TERMINAL UNIT:
↓
MAIN_UNIT:
↓ YES
↓ YES
↓ YES
↓ YES
<External input (SCART)>No picture on the display (4)
↓
Does not the picture of the CVBS signal input to SCART go out?
TERMINAL_UNIT:
↓
MAIN_UNIT:
↓ YES
↓ YES
<External input (SCART)>No picture on the display (5)
↓
Does not the picture of the R/G/B video signal input to SCART go out?
TERMINAL_UNIT:
↓
MAIN_UNIT:
↓ YES
↓ YES
Is DIF signal output from pin (13), (14) of TUNER (TU101) to pin
(35), (36) of IC U1011?
Is the voltage of regulation for a TUNER circuit and the power
supply terminal of IC U401 supplied?
NO
Each power supply circuit is checked.
NO Check the tuner, IC U1011 and their peripheral circuits. Replace
as required.
NO
Are MPEG data (DEMOD_TSDATA0, TSSYNC, TSVAL, and TSCLK)
signals from pin (15), (16), (17), (18) of IC U1011 output to IC U401?
Check MPEG data bus from IC TU1011 to IC U401.
Refer to “ The picture doesn't appear in all modes. ”
NO
Is CVBS signal sent to pin (20) of SCART (CN151)? Check the setting of an external input device that connects of
CN151.
Is CVBS signal sent to pin (175) of IC U401?
NO Check the circuit between IC U401 and CN151.
Refer to “ The picture doesn't appear in all modes. ”
Do X4150 (27MHz) oscillate? NO Check X4150 and its peripheral circuits.
NO Is RGB signal sent to pin (15/11/7) of SCART (CN151)? Check the setting of an external input device that connects of
CN151.
Is RGB signal sent to pin (158/160/161) of IC U401?
NO
Check the line between IC U401 and CN151.
Refer to “ The picture doesn't appear in all modes. ”