Appendix-1 Trouble Analysis Flow - Sony KD-43X720F UC2 Service Manual

APPENDIX-1 Trouble analysis flow

NG
Power On Key
Function check
OK
Check IR Cable
Connection
NG
Reinstall
CONNETCTOR ASSY
Reinstall
(MB-IR-kEY)
IR Cable
NG Exchange
Check TV Function
H board
OK
OK
Check TV Function
Exchange
Main board
OK
Check TV Function
Finish Repair
KD-43X720F&KD-49X720F&KD-49X725F&KD-49X727F&KD-55X720F&KD-55X725F&KD-55X727F
No
OK
NG LED Indicator
Function check
OK
OK
Power Cable
connection Check
Power Cable
NG
Exchange
Check TV Function
PSU board
NG
Finish Repair
Return Set
Does Backlight Yes
turn On?
V-Line/H-Line
Abnormal?
NG
Reinstall
OK
Exchange
Panel
OK
Check TV Function
Yes
Does Picture
appear?
No
Yes
Exchange
Main board
Check TV Function
NG
Exchange
Panel
Check TV Function
Yes or OK
No or NG
No
OK
Panel Cable(FFC)
Connection Check
NG
Reinstall
Panel Cable
NG
Check TV Function
OK
OK
OK
Finish Repair
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