Sharp LC-32LE280X, Руководство по обслуживанию

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LC-32LE280X/LC-40LE280X
4 – 4
No audio heard (1)
No sound in the UHF/VHF reception.
NO Check TU1102 and its peripheral circuits.
YES
Is there the signal input at pins (98), (99) of IC3301?
NO Check IC3301 and its peripheral circuits.
YES
s ti d n a 2 0 7 1 C I d n a 1 0 3 3 C I n e e w t e b n o it c e n n o c k c e h C O N (1,2,3,4) of IC1702 ? n i p t a t u p t n i l a n g i s o i d u a e r e h t s I
peripheral circuits.
YES
Is the L-ch audio signal output at pin (8),(13)
NO Check IC1702 and its peripheral circuits.
of IC1702 normal?
YES
Are the audio signal L-ch and R-ch output at (3)/(4) and (1)/(2) of
P1701 normal? NO Check circuit between IC1702 & P1701.
YES
Check speakers and their peripheral circuits.
of IC1702 normal?
Is the R-ch audio signal output at pin (19) ,(23)
Is the IF output from the tuner pin(6,7,8,9)
of TU1102 as specified ?
I
2
c