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No sound but have picture
Check if there is
sound input signal
Yes
Check if there is signal at L203 and L205
Yes
Check if there is input at C738 、
Check if there is +12V at Pin15 and Pin28 of U705
Yes
Check if there is input at Pin3、Pin12 of U705
Yes
Check if there is output at Pin1、 Pin4 of CN807
Check the
speakers
Still having problems
Check the input source
No
No
No
C739
Yes
No
Change Mainboard
- 40 -
check the signal input
circuit of L203,L205
Check the signal input
circuit of C736 C739
and EC807 EC812
Change FB1
No
Change U705
No
Change L707 L708
L709 L710
Service Manual
Model No.:
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Table of Contents
