20
TROUBLESHOOTING
Is there playback Audio signal at
IC251 pin#53, 57?
Are CLK and DATA obtained at
IC251 pin#42, 43?
NO
Is thereMUTE(H) at IC251
pin#36?
Check IC601.
YES
Is A.SW Signal input at IC251 pin
#27?
Check DRUM connector and DRUM.
NO
Check A.SW at IC601 pin#19.
NO
Replace IC251.
YES
NO
Is 12V obtained at IC251
pin#58?
Check Output JACK.
YES
YES
B. No Hi-Fi playback audio (PLAY MODE)
Is there Hi-Fi(H) at IC251 pin#28?
Check POWER circuit.
NO
Is 5V obtained at IC251 pin#40?
NO