Sony KD-49X7 D Series Service Manual page 34

1.3 No Power DDCON/LDO
BM2/DPA Board Model
START
Check IC404 Vcc voltage
C454
Is voltage >12V?
yes
Check Vcc voltage
C602
Is voltage >4V?
yes
Check Enable
IC600 #pin1
Is voltage >2.5V?
yes
Change DDCON
IC601
DDCON check
Check Vcc voltage
no
C602
Is voltage >3V?
yes
Check
no
D601
Is diode ?
yes
no
Change IC600
Board
BM2
Check
no
D600
Is diode ?
yes
no
Change D601
Check +5V_MAIN DDCON (IC404)
34
IC Ref Voltage supply
IC601 +1.5V_DDR
no
Change D600
Check +3.3V_STBY.
G board or IC408 on DPA
34