Sony KD-75X7800F Service Manual page 21

2018/08/13 23:26:25 (GMT+09:00)
1.3 No Power DDCON/LDO
LDOs check
IC Ref
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)
Voltage supply
START
yes
no
Check Vcc voltage
C6xx
Is voltage >3V?
yes
no
Check Enable pin
voltage
Is voltage >3V?
yes
Change LDO IC
Please refer page-18 (if necessary)
Check +3.3V_DDC_OUT
DDCON (IC403)
or
+3.3V_STBY (G* board)
1.2 No Power U-Com Failure
or
Enable source
21
(Supplementary 21
information)
SYS SET