Samsung PS43E400U1RLXL - 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 ttern
16 Gray Wave Form
H-sync
Gray
Level
Ye s
Ye s
Ye s
Re place the Main Boa rd.
Che ck the output of LVDS .
Is it normally ope ra ting?
Re place the SMP S .
Che ck the ea ch output of the S MPS.
Is it normally ope ra ting?
Che ck the ea ch output of the S MPS a fter
disconnecting the powe r cable from SMPS.
And re place X-Main, Y-Main Boa rd,
Y-S ca n Boa rd.
Che ck the LED opera tion of Logic Boa rd
whitch is normally ope ra ting?
Re place the Logic Board.
No
No
No
Re place the Y-S ca n Boa rd.
No
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