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2.3.no sound
Check if PIN3, 13 voltage
of NV1 is normal?
Check power supply
yes
no
Check the wave of
PIN4,12 of NV1
no
Check PIN24 wave of
N3
no
Check PIN11 wave of
TUNER1
no
Check TUNER1 and its
periphery
23
yes
Check NV1 and its
periphery
yes
Check NS2 and its
periphery
yes
Check N3 and its
periphery
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