No
No
YES
The audio signal is not output
No audio signal output from Line-Out terminal (CN801).
MAIN UNIT:
Is the audio signal output from IC U802 pin (3)
(OUTR) and pin (12) (OUTL) of IC U802?
Check the connection to HPOL(R) OUT and
external devices.
Check the circuit between IC U802 and Jack
CN801.
YES
Is audio signal output from pin (12) (OUTL) and pin
(3) (OUTR) of IC U802 to Jack (CN801)?
Check IC U502 and its peripheral circuits.
No
Is the audio signal input to IC U802pin (2) (-INR)
and pin (13) (-INL)?
YES
Check the peripheral circuit of IC U802.
No
Is the audio signal output from IC U502 pin (P31)
(HPHOL) and (P32) (HPHOR)?
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