Sony KD-43X85K Manual page 28

2022/04/19 01:21:05 (GMT+09:00)
TROUBLESHOOTING
1.3 No Power DDCON/LDO (DDCON Check)
START
Check IC600 Vcc
voltage
C601
Is voltage >12V?
yes
Check Vcc voltage
C801/C628
Is voltage >4V?
yes
Check Enable
IC800 #pin1/
IC608 #pin4
Is voltage >2.5V?
yes
Change DDCON
IC801/IC802/
IC803/IC603
SAFETY NOTES
Pleas refer page 27 for Ref number.
Check Vcc voltage
no
C801 / C628
Is voltage >3V?
yes
Check
no
D801/D601
Is diode okay?
yes
1.2 No Power u-Com Failure
no
or
Enable source
SELF DIAGNOSIS FUNCTION
Check
no
D800/D600
Is diode okay?
yes
no
Change D801/D601
Check 5V_MAIN DDCON (IC600)
TROUBLESHOOTING SERVICE ADJUSTMENT
no
Change D800/D600
Check 3.3V_STBY.
Power board
Check item summary
Board Operation IC Ref
DC/DC IC801
DC/DC IC802
BM5A
DC/DC IC803
DC/DC IC603
DIAGRAM
Voltage supply
1.1V_M5_DDR
0.9V_M5_STBY
1.8V_STBY
1.0V_TU_P
28
HANDLING GUIDE
SYS SET