29A-FD5
29A-FD8
YesYesYes
Yes
NoIs there audio signal at pin (9) of IC1300 and IC1301?Does 5V appear at pin (10) of IC1300 and IC1301?Check IC1300, IC1301 and speaker connector (SS).
YesIs there audio signal at pin (14) (16) of SC301 (NICAM unit socket).NoNo
Check NICAM unit.
No
Is there audio signal at pins (52), (54) of IC451?Check IC451 peripheral circuit.Check IC1300, IC1301 and its peripheral circuit. Check Q1304, Q1305 and peripheral circuit of IC1300, IC1301.
Is audio output terminal J451 normal.
NO NORMAL SOUNDYes
Set the sound system in position. If problem, check (12) (13) (14) pin of TU201 and its peripheral circuits.No
Yes
No
Check TV sound.
Check IC451 and its peripheral circuit.
Change the sound system. Is sound normal?Is there audio signal at pin (62), (64) of IC451?No
TROUBLE SHOOTING TABLE (Continued)
Check NICAM unit, tuner and its peripheral circuit.
Circuits to be checked: YSound control circuit. YSound out circuit. YSIF circuit. YS-convertor.
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