10.2. Important points in adjustment
10.2.1. Important points in optical adjustment
- Before starting optical adjustment, be sure to take anti-static
measures.
- Optical pickup tilt adjustment is needed after replacement of the
following components.
1. Optical pickup unit
2. Spindle motor unit
3. Optical pickup peripheral parts (such as rail)
Notes
Adjustment is generally unnecessary after replacing other parts of the traverse unit. However,
make adjustment if there is a noticeable degradation in picture quality. Optical adjustments
cannot be made inside the optical pickup. Adjustment isgenerally unnecessary after replacing
the traverse unit.
10.2.2. Important points in electrical adjustment
- Follow the adjustment procedures described in this Manual.
10.3. Storing and Handling Test Discs
- Surface precision is vital for DVD test discs. Be sure to store and
handle them carefully.
1. Do not place discs directly onto the workbench, etc., after use.
2. Handle discs carefully in order to maintain their flatness. Place
them into their case after use and store them vertically. Store
discs in a cool place where they are not exposed to direct sunlight
or air from air conditioners.
3. Accurate adjustment will not be possible if the disc is warped
when placed on a surface made of glass, etc. If this happens, use
a new test disc to make optical adjustments.
4. If adjustment is done using a warped disc, the adjustment will be
incorrect and some discs will not be playable.
10.4. Optical adjustment
10.4.1. Optical pickup tilt adjustment
40
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