ITC2
CHASSIS
R402/ R407/ R422/ R435/ R452/ R457/ R472/ R488
Troubleshooting
3 5 Audio Problem
3-5. Audio Problem
3-5-1. Main Speaker No Sound
START
Main Speaker No
Do a Factory Setting
Sound
Sound
START
Main Speaker No
Sound
No Sound
No Sound
Check Speaker Harness
Check Speaker Harness
connectivity
No connectivity for
speaker harness
Sound
Sound
No Sound
No Sound
Change Speaker Harness
Speaker Impedance
≠
6~8
Ω
Check Speaker Impedance
No Sound
No Sound
Sound
Sound
No Sound
No Sound
No Sound
No Sound
Change Speaker
F4000 broken
Check fuse connectivity
at F4000
No Sound
No Sound
No connectivity
of F4000
No Sound
No Sound
Audio IC problem
IC4000 damage
No Sound
No Sound
F4000 OK
Change BB Board
28
DONE