Panasonic DVDRV26 - DIG. VIDEO DISCPLAYE, Service Manual

Page: 35 / 120

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
Measurement point Adjustment point Mode Disc
Tangential adjustment
screw
Tilt adjustment screw T01 (inner periphery) play
T43 (outer periphery)
play DVDR-S15 or DVDT-S01
Measuring equipment Adjustment value
None (Main unit display for servicing is used.) Adjust to the minimum jitter value.
31