Read Sony KD-55X9000C Service Manual online
TROUBLE SHOOTING
3-2-5. NO POWER: DDCON check
Change D9000
No
START
Check Vcc voltage
C9061
Check
D9000
No
Check IC9403 Vcc voltage
C9428
No
g
Is voltage >3V?
Yes
Is diode ?
Yes
Check G board and harness
No
Check Vcc voltage
Check
No
Is voltage >12V?
Yes
Check Enable
No
Change D9001
No
C9061
Is voltage >4V?
Yes
D9001
Is diode ?
Yes
Check +5V_MAIN DDCON (IC9001)
Check Enable
IC9010 #pin1
Is voltage >2.5V?
Change IC9010
No
Yes
Change DDCON
IC9009
127