Sharp 29A-SX1 - Page 27

27
29A-SX1
29A-SX5
29A-SX8
No Yes
YesNo
Is there audio signal at pins (5), (6) of IC401?
Check IC401 and its peripheral circuit.
Check TU200 peripheral parts.
Check TU200 and its peripheral circuits of no problem, set the sound system inpositon.
TROUBLE SHOOTING TABLE (Continued)
NO NORMAL SOUND
Is audio output terminal J401 normal.
Yes
YesNo
No
TV sound.
Is there audio signal at pins (6), (25) of IC300?
Change the sound system. Is sound normal?
Check IC401 peripheral parts.
Is there audio signal at pin (9) of IC1300 and IC1301?
No
No
Yes
Check IC300.
Yes
Check IC1300, IC1301 and their peripheral parts.
Set S-Volume at maximum. Do pins (15), (18) of IC300 work?
Check IC302, IC305, IC303, IC304 and their peripheral circuit.
(model A-SX8 and A-SX5) Check NICAM unit peripheral circuit.