5-5 Trouble shooting Chart
BT does not work
no
yes
no
yes
no
yes
no
yes
Check the DUT whether
open the BT function
Open BT function
Check voltage STB_3Y3
at U19 on FE Board
whether normal or not
Check the FFC connector from
Main PCB to FE PCB
Check the BT Module U19
output whether normal or
not
Change the BT Module
Check BT output after OP
U20 whether normal or not
Change the U20
Change the Main PCB
Power line of Audio PCB is short
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 ...