LG UBK80 Service Manual page 87

Ultra hd blu-ray disc player
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1. PURPOSE
If LD (Laser Diode) have problem, disc reading problem can happen. So it is needed to check LD status.
2. LD CHECK PROCEDURE
1) Power on the set.
2) Press Settings.
3) Under DISPLAY highlighted condition, press '5'
 '1'  '7'  '7'  '7'  '7'  '7'  Enter on the
remote controller to display special mode.
Move to the [1]Laser Check and click.
LD CHECK GUIDE
4) Check result is shown automatically. If you will
5-2
see "PASS", BD/DVD/CD LD status is OK.
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