5-6 Trouble shooting Chart
Audio IN does not work
no
yes
no
yes
no
yes
no
yes
Check the IN board have
the singal whether or not
Check the singal source
Check the FE board have
the signal whether or not
Check the MP3 connector from IN
PCB to FE PCB
Check U6 P14&P5 have
signal On Main PCB
whether or not
Check the FFC connector from
Main PCB to FE PCB
Check U6 P10 is high
level
，
P9 is low lever?
Check the 8301 work whether
normal or not
Change the U6
Audio IN does not work
yes
Summary of Contents for HTL4111B/12
Page 43: ...USB MP3 board Print Layout bottom and top side 7 14 7 14 ...
Page 44: ...Front Control and Key board Print Layout bottom side 7 15 7 15 ...
Page 45: ...Front Control and Key board Print Layout Top side 7 16 7 16 ...
Page 46: ...Power board Print Layout Bottom side 7 17 7 17 ...
Page 47: ...Main board Print Layout Bottom side 7 18 7 18 ...
Page 48: ...Main board Print Layout Top side 7 19 7 19 ...
