NAD C660 Service Manual page 12

System Check.
Load tray without inserting disc.
Does Tray operate normally?
YES
Does Pick-up move to inside?
YES
Does Spindle Motor rotate in a moment?
YES
Does Lens move Up/Down?
YES
Does Laser turn on?
YES
After eject tray, Inset CD Disc and reloading.
Does Disc stop?
NO
Does Disc rotate
continuously as Disc recognition
is abnormal?
NO
After eject tray, Inset CD-R Blank
Disc and reloading.
NO
Does Disc stop?
NO
Does Disc rotate
continuously as Disc recognition
is abnormal?
NO
OK
NO
Go to "Tray operation is abnormal"
NO
Go to "Sled operation is abnormal"
NO
Go to "Spindle operation is
abnormal"
NO
Go to "Focus Actuator operation is
abnormal"
NO
Go to "Laser is abnormal"
YES
Go to "Spindle control is abnormal 1"
YES
Go to "Spindle control is abnormal 2"
YES
Go to "Spindle control is abnormal 3"
YES
Go to "Disc recognition is abnormal"
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