Sony KD-55A8F Service Manual page 21

2018/03/16 22:32:44 (GMT+09:00)
1.3 No Power DDCON/LDO
DDCONs check
IC Ref Voltage supply
IC402 +5.0V_VBUS/+5V_MAIN
+3.3V_STBY
IC403
/+3.3V_MAIN
Q407 +3.3V_MAIN
IC405
IC601 +1.5V_DDR
IC604
IC4001
IC4002
IC4003
(AC-ADP only)
+1.8V_TU
+1.0V_M2
+1.5V_BE
+1.1V_BE
+1.0V_BE
Please refer page-19 for Ref number.
START
no
Check fuse
F4xx / F40xx/F6xx
Is fuse OK?
yes
no
Check Vcc voltage
C4xx / C40xx/C6xx
Is voltage >12.0V?
yes
no
Check Enable pin
voltage
Is voltage >2.5V?
yes
Change DDCON IC
BM2A Board Model
Change Fuse
1) Check POWER_ON P-on u-com #pin10
(Refer 1.2 No Power U-Com Failure)
2) Check G* board
1.2 No Power U-Com Failure
or
Enable source
21
(Supplementary
21
information)
SYS SET