When laser does not light
A
Does lenses move up and down?
YES
YES
NONO
Has Pick-up returned to theAre data transterred from
IC701 defective.
innermost position?IC 701?
YESYES
NO
IC 601, 603 defective.
Is below signal output at
IC603 Pin17,18 ?
YES Slide motor defective.
Connector defective.
NO
Does pick-up stop after having
moved to the innermost IC603 defective.
position?
YES
connector defective.
IC602 defective.
NO
Dose generate about 2.5V at
IC601 defective.
IC601 Pin18 (LD)?
Surrounding Circuitry defective.
YES
NO
Has laser power source returned to
Connector defective.
the Q601
(Q601 collector voltage about 1.8V)
YES
YES Q601 defective, connector
defective.
R610 ? 0.7V
Laser defective.
YES
Flow laser current?NO
Laser defective.
Both voltage of R610 is about 0.7V?R610 ? 0.7V
connector defective, short etc.
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