Sharp LC-50LE442U, Service Manual

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29
Main UNIT:
No picture on the display (2)
Does not the picture come out when VHF/UHF is received?
Check TU_VCCr/VCCK/DDRV/AV33/DV33/+3V3SB
is applied to Tuner and U2102 or not.
Is the DIF signal output from pin (10) and pin (11) of
TUNER
(TU9102)?
Is the DIF signal sent to pin (58) and pin (59) of IC
U2102?
Refer to
“
The picture doesn't appear in all modes.
”
Check each power IC and peripheral
components are correct or not.
Check the tuner and its peripheral circuits.
Replace as required.
Check IC U2102 its peripheral circuits.
NO
NO
NO
YES
YES
YES