3. AUDIO ABNORMAL
Audio abnormal
Check the speakers connection
Check the function input
YES
YES
YES
YES
YES
NO
NO
Check the output
U702 pin2, 4, 8,10
Check the DC 9.5V
of U503 pin24
Check the "High" of U702 pin5
Check ZD703, D705
NO
NO
Check the input signal
of U702 pin7, 11
Check the DC 12V
of R701
Check the power circuit
3-4
ELECTRICAL TROUBLESHOOTING GUIDE
