LG TCH-800, Руководство по обслуживанию

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- 2-4 -
(A) when laser does not light.
Is below signal “L” at IC101
Pin 70
(CDP PCB) ?
NO
NO
NO
NO NO
NO
NO
NO
YES
Slide motor defective.
Connector defective.
YES
IC301 defective.
IC101defective.
IC101(CDP PCB) defective.
Surrounding circuitry defective
TR (CDP PCB) defective.
Connector defective.
Laser defective
Connector defective.
Laser defective
IC101,201(CDP PCB) defective.
NO
NO
Reset SW defective
Connector defective.
NO
IC201 defective.
Has Pick-up returned to the
innermost position?
Does pick-up stop after having
moved to the innermost position?
IC201 Pin 25
Has laser power source returned
to the TR1 (CDP PCB)?
(TR1 collector voltage about
2.2V)
Flow laser current?
Both voltage of TR1(CDP PCB)
is about 1.0V?
NO
YES
R40 (CDP PCB)
R40 (CDP PCB)
Are data transferred from
IC201 Pin 27, 28, 37?
Is below signal output at IC201
Pin 26,27(CDP PCB)?
Are detect output input at IC101
Pin38 (CDP PCB)?