Sanyo HV-DX300A Service Manual page 19

TROUBLESHOOTING
d. FRONT E-E
No sound in Front
E-E mode.
NO
Is Audio signal at IC601 pin#1,
Check Input Front JACK.
12?
YES
NO
Is Audio signal output at IC601 pin
Comparing with switching table, are SWA, B CTL SIGNAL
#3, 13?
right at IC601 pin #9,10?
YES
NO
YES
Check IC501.
Replace IC601.
Check Output JACK.
18