Sony KD-55A8F - Slide Number 22

(Supplementary
information)
Check Enable pin
voltage
Is voltage >3V?
1.2 No Power U-Com Failure
or
Enable source
no
START
yes
Change LDO IC
Check Vcc voltage
C4xxx or C6xx
Is voltage >3V?
Check +3.3V_DDC_OUT
DDCON (IC403)
or
+3.3V_STBY (G* board)
no
yes
IC Ref Voltage supply
IC602 +1.05V_M2_STBY
IC603 +1.05V_M2_A_1
IC605
+1.05V_M2_ST_ET
IC606 +1.05V_M2_A_2
IC607
VCC3IO_EMMC
(1.8V)
IC4004 +1.8V_BE
1.3 No Power DDCON/LDO
BM2A Board Model
Please refer page-19 for Ref number.
yes
22
22
LDOs check
SYSSET
2018/03/1622:32:44(GMT+09:00)