Sanyo HV-DX300A Service Manual page 20

B. No Hi-Fi Playback audio(PLAY MODE)
Is 12V obtained at IC251 pin#34?
YES
Is 5V obtained at IC251 pin#40?
Is Audio signal at IC251 pin#41?
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.
19
YES
right at IC601 pin #9,10?
TROUBLESHOOTING
Check POWER circuit.
Check A.SW at IC501
pin#19.
Replace IC251.
NO
Check IC501.