MHC-V83D
32
Sony CONFIDENTIAL
For Authorized Servicer
By using oscilloscope, check I2S audio signal
at test pin CL2020 & CL2035 of IC2001.
Can capture I2S audio signal?
When playback music, there is no sound
can be heard from speaker box.
Yes
No
Exchange MOTHERBOARD mounted pc board.
END
Yes
Yes
Yes
Yes
Yes
No
IC2001 is broken.
Exchange new IC2001.
No
IC2001 is broken.
Exchange new IC2001.
No
No
IC2001 is broken.
Exchange new IC2001.
By using oscilloscope, check PWM audio
signal at pin 38, 39, 42, 43, 48, 49 of IC2001.
Can capture the PWM audio signal?
By using oscilloscope, check PWM audio signal
at pin 5, 6, 14, 15 of IC2002 (Mid channel).
Can capture the PWM audio signal?
By using oscilloscope, check PWM audio signal
at pin 38 & 39 of IC3503 (SW channel).
Can capture the PWM audio signal?
Still no sound from speaker box when
playback music?
Exchange MOTHERBOARD mounted pc board.
MOTHERBOARD Mount
Ampli
fi
er Diagnosis Flow (2/2)
2. No sound from speaker
SYS SET
2020/06/22 22:32:42 (GMT+09:00)