TROUBLESHOOTINGTROUBLESHOOTING
b. AV1 E-E
c. AV2 E-E
No sound in AV1 E-E mode.
No sound in AV2 E-E mode.
YES
YES
Is 12V obtained at IC251 pin#34?
Is 12V obtained at IC251 pin#34?
NO
Check POWER circuit.
YESNO
Check POWER circuit.
YES
Is 5V obtained at IC251 pin#40?
Is 5V obtained at IC251 pin#40?
NO
Is Audio signal at IC251 pin#6, 7?Check Input AV1 JACK
NO
Is Audio signal at IC251 pin#8, 9?Check Input AV2 JACK
YES
YES
Is Audio signal output at IC251NOAre CLK and DATA obtained atYES
pin#16,17?IC251 pin#42,43?Replace IC251.Is Audio signal output at IC251NOAre CLK and DATA obtained atYES
pin#19, 20?IC251 pin#42,43?Replace IC251.
YES
YES
Is Audio signal output at IC602 pinNO
Check IC602.
#3, 13?Is Audio signal output at IC602NO
Check IC602.
pin #3, 13?
YES
YES
Check Output JACK.
Check Output JACK.
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