Sony KDL70XBR7 Training Manual page 13

Unit Does
Not Turn On
Disconnect AC power for at
least 30 seconds. Re-apply
AC power
Any Relay
clicks heard?
120VAC
CN6100 on G8
3.3VDC
CN6402 -7 on
G8 Board?
CN6402-9 on G8
Board goes high
when power button
pressed ?
FBU Board
CTV-53
Yes
No
No
F2 Board or no AC
Board ?
Yes
No
G8 Board
Yes
Yes
G8 Board
No
POWER SUPPLY TROUBLESHOOTING FLOWCHART
Standby LED No
blinking 2X?
Yes
G8 Board
Power
FIGURE 3-2
Chapter 3 - Power Supply Troubleshooting
CN402-9 on G8
Yes
Board goes high
when power button
pressed?
No
FBU Board
G8 Board
11