The optical pickup can be damaged by static electricity from your body. Be sure to take static electricity countermeasures when working around the optical pickup.
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The optical pickup is an extremely high-precision mechanism. Do not subject it to strong impact.
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To preserve the quality of the optical pickup replacement parts during transport and installation, the terminals of the laser diode are short-circuited. After replacing the parts, use the proper procedure to return the laser diode to its originalcondition. (Refer to section 11.12, Assembling the Optical Pickup.)
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Testers cannot be used to check the laser diode of the optical pickup. The power supply inside the tester can easily damage the laser diode.
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Take care when handling the flexible cable because excessive force can cause it to break.
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You cannot adjust the semifixed resistor for laser power adjustment. Do not turn it.