Troubleshooting - Sony FW-43XE8 Series Service Manual

KF/KFW 55" No Power(GL71 PSU board)
Switch Off plug(AC Off)
NO POWER
Open TV rear cover to check PSU Board
Wait more than 5 minutes before start
This is to ensure PSU is not in protection mode
Check
Fuse F6101,
Open?
AC Off
no
AC ON
Check
No Voltage
STBY3.3V
Connector CN6401
PIN 5
Okay
Check
No Voltage
POWER_ON
Connector CN6401
PIN 9
Okay
Check
No Voltage
REG12V
Connector CN6401
PIN 13to18
Okay
TV Business Division

TROUBLESHOOTING

PSU broken*
Replace PSU
Yes
PSU broken*
Replace PSU
Main Board Problem
PSU broken*
Replace PSU
SECTION 3
Check
BL_ON
Connector CN6401
PIN 7
Okay
Check +Out2
and +Out3 at
CN6801
Okay
PSU OK
Connector
CN6401
CN6401
CN6401
CN6401
CN6801
*If PSU board replaced, please proceed with PSU
standalone check
No Voltage
Main Board Problem
No Voltage
PSU broken*
Replace PSU
Output
Input/output
Voltage
Name
STBY3.3V 3.35~3.55V
POWER_
2.6~3.55V
ON
REG12V 12.2~13.2V
BL_ON 2.6~3.55V
+OUT2/3 85.5~125.3V
PIN
5
9
13~18
7
2~3
18 18