3h.2 Troubleshooting Detail Audio Problem
3h.2.1 Main Speaker No Sound
Check Speaker Harness
Connectivity
Speaker
Impedance
≠ 6~8 Ω
No Sound
START
Check Main Speaker Impedance
Check fuse connectivity
at F4001
DONE
Change B-board /
LK-board
Main IC (IC5000) or
Audio IC (IC4001)
problem
No connectivity
for
speaker harness
No Sound
No Sound
Sound
Sound
No
connectivity of
F4001
No Sound
No Sound
Change Speaker
Harness
Change Main
Speaker
F4001 broken,
Replace F4001
Sound
No Sound & F4001 OK
Sound
No Sound & F4001 OK
Do a Factory Setting &
set to desire channel with sound
No Sound
Check I2S lines short to GND?
(BCLK, LRCLK, SDATA0)
Any I2S line
short to GND
No Sound & I2S lines no short to GND
106
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