Sony KD-49X7 D Series Service Manual page 31

1.3 No Power DDCON/LDO
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
BFM Board Model
LDOs check
START
yes
Check Vcc voltage
no
C6xx
Is voltage >3V?
yes
Check Enable pin
no
voltage
Is voltage >3V?
yes
Change LDO IC
Pleas refer page-28 for Ref number.
Check +3.3V_DDC_OUT
DDCON (IC403) or
+3.3V_STBY (Gx board)
1.2 No Power U-Com Failure
Or Enable source
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