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PT-50LC13-K
A
Are there audio signals at Pin 2, 4, 9, 11 of IC3501 on the Rear Jack C.B.A.? YES Replace IC3501 on the Rear Jack C.B.A. NO Check the signal lines between IC3501 and JK3501 on the Rear Jack C.B.A.
B
Are there audio signals at Pin 16 and 18 of IC3501 on the Rear Jack C.B.A.? YES Replace IC3501 on the Rear Jack C.B.A. NO Check the signal lines between IC3501 on the Rear Jack C.B.A. and JK4801 on the Front Jack C.B.A. (via P3902 connector).
C
Are there audio signals at TP7501 and TP7502 on the Tuner C.B.A.? YES Are there audio signals at Pin 62 and 64 of IC3501 on the Rear Jack C.B.A.? YES Replace IC3501 on the Rear Jack C.B.A. NO Check the signal lines between IC3501 and P3501 on the Rear Jack C.B.A. NO Check IC7501, U7001(Main Tuner), and the surrounding parts on the Tuner C.B.A.
D
Are there audio signals at Pin 11, 12, 20, 21, 54, 55, 70, 71 of IC3602 on the Rear Jack C.B.A.? YES Replace IC3602 on the Rear Jack C.B.A. NO Check the signal lines between IC3602 and JK3601 (and/or JK3602, JK3603, JK3604) on the Rear Jack C.B.A.
E
Are there audio signals at Pin 4, 5, 11, 14 of IC4002 on the Main C.B.A.? YES Check the IC4002 and the surrounding parts on the Main C.B.A. NO Check the signal lines between IC4002 and JK4001 (and/or JK4003) on the Main C.B.A.
F
Are there audio signals at Pin 2 and 15 of IC4002 on the Main NO C.B.A.? YES Check the IC4002 and the surrounding parts on the Main C.B.A. Check the signal lines between IC4002 on the Main C.B.A. and JK4802 on the Front Jack C.B.A. (via P3901 connector).
NO SOUND FROM THE AUDIO OUTPUT JACK
Is the sound output from the built-in speaker? YES Check the audio signal lines between IC3701 and JK4701, IC4701, and the surrounding parts on the Rear Jack C.B.A. NO Perform the troubleshooting of "NO SOUND FROM THE BUILT-IN SPEAKER."
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