Assembling And Disassembling The Optical Pickup; Disassembly Procedures - Yamaha DVD-C996 Service Manual

DVD-C996/DV-C6280
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ASSEMBLING AND DISASSEMBLING THE OPTICAL PICKUP (MECHANICAL PARTS)
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.
1. Handling the Optical Pickup
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.
1. The optical pickup is an extremely high-precision mechanism. Do not subject it to strong impact.
2. 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 original condition.
(Refer to page 22, Assembling the Optical Pickup.)
3. 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.
4. Take care when handling the flexible cable because excessive force can cause it to break.
5. You cannot adjust the semifixed resistor for laser power adjustment. Do not turn it.
2. Disassembly Procedure
Use the following procedure to replace major parts.
For the assembly procedure, follow the flow chart in reverse.
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Top cover
Tray ass'y
Static electricity
countermeasures
CM-220 unit
Clamper ass'y
PU ass'y
Traverse unit
Stepping motor unit
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Optical pickup unit
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Spindle motor unit
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