Sony KD-43X7 G Series Service Manual page 102

2.8.2 Troubleshooting Detail Audio Problem
2.8.2.1 Main Speaker No Sound
No Sound & (F3101 or F3102) OK
No Sound & I2S lines no short to GND
START
No Sound
Do a Factory Setting &
set to desire channel with sound
No Sound
Headphone No Insert,
Check J3501 Pin4 Voltage
No Sound
No connectivity for
Check Speaker Harness
Connectivity
No Sound
Speaker Impedance
Check Speaker Impedance
No Sound
No connectivity of
(F3101 or F3102)
Check fuse connectivity
at (F3101 or F3102)
No Sound & (F3101 or F3102) OK
Check I2S lines short to GND?
(BCLK, LRCLK, SDATA0)
J3501 Pin4 ≠ 0V
Replace J3501
speaker harness
Change Speaker
Harness
No Sound
≠ 6~8 Ω
Change Speaker
No Sound
(F3101 or F3102) broken,
Replace (F3101 or F3102)
Any I2S line
short to GND
Main IC (IC5000) or
Audio IC (IC3101) problem
Change B-board
DONE
Sound
Sound
Sound
Sound
Sound
102
SYS SET