5-4 Trouble shooting Chart
No audio output
no
yes
no
yes
no
yes
no
yes
Make sure you have
choose the right channel
Choose the right channel
Check the signal input is
good
Change the signal source
Check the +18V on main
board whether normal or
not
Change the signal source
Check +5V +3.3V +1.25V
on main board whether
normal or not
Change the main board
Change the Amplifier
No audio output
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 ...