Sony XR-55A75L User Manual

35
Check Enable pin
voltage
Is voltage >2.5V?
1.2 No Power U-Com Failure
or
Enable source
Change Fuse
no
no
START
yes
Change DDCON
or LDO IC
Check fuse
F4xx / F6xx/F8xx/F48xx
Is fuse OK?
Check Vcc voltage
C4xx / C6xx/C8xx/C48xx
Is voltage >12.0V?
no
yes
yes
1) Check POWER_ON P-on u-com IC401 #pin10
(Refer 1.2 No Power U-Com Failure)
2) Check G-board
Board Operation IC Ref Voltage supply
BM5S21
DC/DC IC600 5V_MAIN/5V_AUDIO
DC/DC IC601
3.3V_MAIN/3.3V_AU
DIO
DC/DC IC804 0.8V_M5_CORE
DC/DC IC807 1.8V_M5
DC/DC IC808 1.0V_M5
DC/DC IC810 0.8V_M5_CPU
DC/DC IC811 0.8V_M5_GPU
DC/DC IC4800 1.8V_BE_DDC
DC/DC IC4801 1.1V_BE
DC/DC IC4802 0.9V_BE_DDC_1
DC/DC IC4803 0.9V_BE_DDC_2
DC/DC IC4809 0.8V_BE
DC/DC IC4810 0.7V_BE
Please Refer page 31 for Ref Number.
1.3 No Power DDCON/LDO (DDCON Check) – XR-83A80*
TROUBLESHOOTING
SYSSET
2023/11/2806:39:49(GMT+09:00)

Sony XR-55A75L Specifications

General

Brand	Sony
Model	XR-55A75L
Category	OLED TV
Language	English