Sony KD-49X7 D Series Service Manual page 35

1.3 No Power DDCON/LDO
BM2/DPA Board Model
Board IC Ref Voltage supply
DPA IC4004
BM2 IC602 +1.05V_M2_STBY
BM2 IC603 +1.05V_M2_A_1
BM2 IC605 +1.05V_M2_ST_ET
BM2 IC606 +1.05V_M2_A_2
LDOs check
+1.8V_BE
Please refer page-32 for Ref number.
START
yes
Check Vcc voltage
no
C4xxx or C6xx
Is voltage >3V?
yes
Check Enable pin
no
voltage
Is voltage >3V?
yes
Change LDO IC
35
Check +3.3V_DDC_OUT
Check +3.3V_DDC_OUT
DDCON (IC409)
DDCON (IC409) or
or
+3.3V_STBY (Gx board)
+3.3V_STBY (Gx board)
1.2 No Power U-Com Failure
1.2 No Power U-Com Failure
or
Or Enable source
Enable source
35