CHAPTER 4.TROUBLESHOOTING TABLE
[1]TROUBLE SHOOTING TABLE
YES
NO
TEREMINAL
The sound is not emitted from the speaker though the picture has come out.
No sound output in all models?
NO
YES
NO
YES
NO
YES
Check IC U502/U802 and its peripheral circuits.
Is audio signal input to pin (5) (MCLK), pin (6)
(SDATA), pin (7) (SCLK), pin (8) (LRCLK) of IC
U801 (AMP)?
Check the line between IC U502 and IC U801.
Is MUTE circuit [MUTEN] normal ?
Check the MUTE_SPK. (Q802, R8033, R9052,
C8030 (etc.).
Check ICU 801 and its peripheral circuits.
Check Speaker Box (right and left) and wire
harness.
MAIN UNIT:
Is the audio signal outputs of pin (P31), pin (P32) of
IC U502 and pin (12) (L OUTPUT), pin (3) (R
OUTPUT) of IC U802 (Pre-AMP) normal?
Is the audio signal output of pin (3,4) (L-ch) and pin
(1,2) (R-ch) of CN802 (AOUDIO-CONNECTOR)
normal?
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