No Power (Xmh-75) - Sony KDL-65W850C Service Manual

3-2-2. NO Power (XMH-75)

START
AC Connect
(80 ~ 288V
Can TV power on?
No
Yes
F6101 Fuse
OPEN check
No
No
STBY output check
(3.35~3.55V)
Yes
Power
No
ON input check
(~3.3V)
Yes
No
12V output check
(12.2~13.2V)
Yes
KDL-65W850C, 855C, 857C, 75W850C, 855C
Replace
Power supply
(G*)
Replace
Power supply
(G*)
Main Board
Problem(B*)
Replace
Power supply
(G*)
BL_ON active HIGH
(~3.3V)
Yes
LED output check
(133.4V~192.9V)
Yes
Power Supply
Working Normal
Output Connector
Output
Voltage
Name CN6401
BL_ON 2.64V~3.3V Pin 3
STBY3.3V 3.35V~3.55V Pin 5
AC OFF
3.45V Pin 7
DET
BL_ERR 0V Pin 8
Power_ON 2.64V~3.3V Pin 9
Pin 13Pin
REG12V 12.2V~13.2V
18
TROUBLE SHOOTING
No
Main Board
Problem (B*)
Case 4
Yes
no
BL Err level check
(~2.8V)
No
Replace Power supply
(G*)
Output
Output Voltage
Name
+OUT1 133.4V ~ 192.9V
+OUT2 133.4V ~ 192.9V
+OUT3 133.4V ~ 192.9V
+OUT4 133.4V ~ 192.9V
Size B* Board G* Board
65"
BMX GL1SB
75"
BMX
Connector
CN5801
Pin 1
Pin 2
Pin 3
Pin 4
GL1C
33