Advertisement
AUX in does not work
AUX in does not
work
Go
Check Main Board U33 PIN2,PIN15 signal
input whether right or not
Yes
Check voltage at U33 74HC4052
PIN16, +12V, PIN7， -12Von Main
Board Whether normal or not
Yes
Check
U33
broken
Or not
Yes
Replace U5 74HC4052
5-8
74HC4052
whether
No
Check C166,C167,R87,R91
No
Check Main Board U4 power
supply and out circuit
No
Check Main Board U4
Trouble shooting Chart
Advertisement
