Sony KD-43X85K Service Manual page 47

TROUBLESHOOTING
2.2 LED Blinking: 3x (AU ERR)
3x blinking
(AUD_ERR)
Main-Board
Audio Amp Fuse broken?
No
TV
Main Board
Power OFF
Audio Amp PVDD-GND short?
check
No
Main-Board
Audio Amp DVDD-GND short?
No
Main-Board
TV
Audio Amp PVDD OK?
Power ON
Before enter 3x blinking,
check
Check voltage supplied to Main-Board
Audio Amp PVDD
for that moment.
No
Error Item
DC_ALERT
AUD_ERR
Yes
Yes
Replace
Main Board
Yes
NG
Yes
Replace
Power-Board or LD-Board or
AC Adapter
NG
Measure the Speaker Unit
impedance by multi-meter
More than 10Ω or
Less than 3.6Ω ?
No
Measure the Speaker Harness
connectivity by multi-meter
No connectivity? or
Shorted to GND/Chassis?
Number of STBY LED flashing
3
3
OK
Main Board
Power-Board or
OK
LD-Board or
AC Adapter
Yes
Replace
Speaker
NG
Yes
Replace
Speaker Harness
Description
Main board 5V power rail monitoring
Audio amp error detection
OK
Speaker
OK
Speaker Harness
47
SYS SET