Sanyo HV-DX3E Service Manual page 17

TROUBLESHOOTING
b. AV1 E-E
No sound in AV1 E-E mode.
YES
Is 12V obtained at IC251 pin#34?
YES
Is 5V obtained at IC251 pin#40?
Is Audio signal at IC251 pin#6, 7?
YES
Is Audio signal output at IC251
pin#16,17?
YES
Is Audio signal output at IC601 pin
#3, 13?
YES
Check Output JACK.
NO
NO
NO
Are CLK and DATA obtained at
IC251 pin#42,43?
NO
Comparing with switching table, are SWA, B CTL SIGNAL
YES
Replace IC601.
YES
right at IC601 pin #9,10?
16
Check POWER circuit.
Check Input AV1 JACK
Replace IC251.
NO
Check IC501.