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LG GWA-4164B Service Manual page 72

Dvd/cd rewritable drive
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Load tray without inserting disc.
Does Tray operate normally?
Does Pick-up move to inside?
Does Pickup lens move
After eject tray, Insert CD-ROM Disc
and check rotation.
continuously and the drive recognize
After eject tray, Insert Blank CD-R or
RW Disc and check rotation.
continuously and the drive recognize the
After eject the tray, Insert DVD Disc and
continuously and the drive recognize the
After eject the tray, Insert DVD+R/RW Disc
and check rotation.
continuously and the drive recognize the
76
System Check.
YES
YES
YES
up/down?
YES
Does Laser turn on?
YES
YES
Does Disc rotate
the disc?
YES
YES
Does Disc rotate
disc?
YES
check rotation.
YES
Does Disc rotate
disc?
YES
YES
Does Disc rotate
disc?
OK
NO
Go to "Tray operating is abnormal"
NO
Go to "Sled operating is abnormal"
NO
Go to "Focus Actuator operating is
abnormal"
NO
Go to "Laser operating is
abnormal"
NO
Go to "Recognition fail Case1
(CD-ROM Disc)"
NO
Go to "Recognition fail Case2
(Blank CD-R/RW)"
NO
Go to :Recognition fail Case3
(DVD Disc)"
NO
Go to :Recognition fail Case4
(Blank DVD+R/RW)"

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