Samsung PL43E400U1F - Analog Part Troubleshooting

4.Troubleshooting
CAUTION
MakesuretodisconnectthepowerbeforeworkingontheIPboard.
4.1.3.AnalogPartTroubleshooting
1)Itiseasytocheckanalogvideosignalthandigitalvideosignal.
2)Usereferencesignalinput.(ex.16Gray)
3)CheckSignalLevelandsync.
4)CheckSignalpathuntilinputofVideoDecoder.
•Tuner→Switch→VideoDecoder
•A VConnector→Switch→VideoDecoder
•Scart→Switch→VideoDecoder
1
6 Gra y Pa tte rn
16 Gra y Wave Form
H-sync
Gray
Level
Ye s
Ye s
Ye s
Re place the Main Board.
Check the output of LVDS .
Is it normally ope rating?
Re place the S MPS .
Check the each output of the S MP S.
Is it normally ope rating?
Check the ea ch output of the S MP S a fte r
disconnecting the powe r ca ble from SMPS.
And re pla ce X-Ma in, Y-Main Board,
Y-S ca n Board.
Check the LED ope ration of Logic Board
whitch is normally ope rating?
Re place the Logic Board.
No
No
No
Re place the Y-S ca n Board.
No
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