Sony XR-55A75L Service Manual page 90

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TROUBLESHOOTING
3.1 No Sound for Speaker – XR-*A75L
No Sound
Speaker
Check
・[Speakers] setting is [TV Speakers]?
・Nothing is connected to Headphone terminal and Bluetooth ?
・Volume setting is not too small?
OK
Check reading measurement by using
multi-meter within this range?
Speaker = 5.1Ω ~ 6.9Ω
Piezo = 2140�������� ~ 3210��������
YES
Confirm the Speaker/Piezo
Cut or Shorted to the chassis ?
OK
Others TV settings correct?
OK
Replace B-Board
Then OK ?
Still NG
Replace G-Board and G-Board Harness
NO
Speaker/Piezo
NG
Replace Speaker/
NG
Piezo Harness
NG
NG
Factory Reset
NG
This confirmation way is only for traditional speaker & exciter.
In PIEZO Tweeter case, we can confirm OK or NG
by listening actually.
Replace
OK
Then OK?
OK
Then OK?
OK
Then OK?
OK
Finish
No sound only
Analog or Digital RF ?
Go to
3.7 No Sound Tuner
No sound only
HDMI ?
Go to
3.8 No Sound HDMI
90
SYS SET

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