Sony KD-55X9000C Service Manual ▷ View 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
TROUBLE SHOOTING
3-2-6. NO POWER: LDOs check check
START
Check Vcc voltage
No
Yes
Check Enable pin
lt
1 2 N P
U C
F il
No
Check Vcc voltage
C9xxx
Is voltage >3V?
Check +3.3V_MAIN DDCON (IC9003)
No
Yes
voltage
Is voltage >3V?
1.2 No Power U-Com Failure
Yes
Change LDO IC
128
TROUBLE SHOOTING
3-3-1. 2 Times Blinking (Main power Error)
3-3. STANDBY LED BLINKING
3-3-2. 3 Times Blinking (DC Alert)
2-time blinking
BMFL/BMFW board
3-time blinking
Check +12V_REG
at pin 13/15/17 of CN9000
on B* Board,
Voltage > 13.2V ?
Yes
G* Board
Check +5.0V_MAIN
at pin1 in IC8001, 4.959V
<Voltage<5.285V?
IC9014,etc
(B* Board)
DC_ALERT
NG
No
B* Board
Go to Audio check point
AUDIO
Voltage 5.285V?
OK
Go to Audio check point
HDMI
TUNER
Go to HDMI check point
Go to Tuner check point
129
TROUBLE SHOOTING
3-3-3. 3 Times Blinking (Audio Error)
LED 3x blinking
Segment “XS”?
Yes
Audio Error ?
See other flow
No
Replace B-K Harness
OK ?
Yes
No
B-K harness NG
Yes
Go to page
Power Off Checking*1
O
No
Replace K-PWB
OK ?
Yes
K-PWB NG
Go to page
Power off Checking*2
OK ?
Replace B-PWB
No
Yes
B PWB NG
p
OK ?
B-PWB NG
130