Haier 55E3500c Service Manual page 42

No sound but have picture
Check if there is
sound input signal
Yes
Check if there is signal at C715 and RC728
Yes
Check if there is input at C738 C739
Check if there is +12V at Pin15 and Pin28 of UD3
Check if there is input at Pin3 、 Pin12 of UD3
Check if there is output at Pin1、
Pin2 Pin3 Pin4 of J17
Check the
speakers
Still having problems
No
Check the input source
No
No
、
Yes
Yes
Yes
Change Mainboard
- 40 -
check the signal input
circuit of C715,C728
check the signal input
circuit of C738, C739
and U702
No
Change LD3
No
Change UD3
No
Change FB6 FB8
FB9 FB10
Service Manual
Model No.:
、