LG DR1F9H Service Manual page 70

System Check.
Load tray without inserting disc.
YES
Does Tray operate normally?
YES
Does Pick-up move to inside?
YES
Does Pickup lens move
up/down?
YES
Does Laser turn on?
YES
After eject tray, Insert CD-ROM Disc
and check rotation.
YES
Does Disc rotate
continuously and the drive recognize
the disc?
YES
After eject the tray, Insert DVD Disc and
check rotation.
YES
Does Disc rotate
continuously and the drive recognize the
disc?
YES
After eject the tray, Insert DVD+R/RW Disc
and check rotation.
YES
Does Disc rotate
continuously and the drive recognize the
disc?
OK
NO
Go to "Tray operation is abnormal"
NO
Go to "Sled operation is abnormal"
NO
Go to "Focus Actuator operation is
abnormal"
NO
Go to "Laser operation is
abnormal"
NO
Go to "Recognition fail Case1
(CD-ROM Disc)"
NO
Go to :Recognition fail Case2
(DVD Disc)"
NO
Go to :Recognition fail Case3
(Blank DVD+R/RW)"
4-3