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Audio IN does not work
Audio IN does not work
Check the IN board have
the singal whether or not
Check the FE board have
the signal whether or not
Check U6 P14&P5 have
signal On Main PCB
whether or not
Check U6 P10 is high
level，P9 is low lever?
Change the U6
5-6
yes
yes
yes
yes
yes
no
Check the singal source
no
Check the MP3 connector from IN
PCB to FE PCB
Check the FFC connector from
no
Main PCB to FE PCB
no
Check the 8301 work whether
normal or not
Trouble shooting Chart
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