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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.
17.4. Optical adjustment
17.4.1. Optical pickup tilt adjustment
Measurement point
Measuring equipment
None (Main unit display for servicing is used.)
17.4.1.1. Adjustment procedure
1. While pressing STOP button on the main unit, press "5" on the
remote control unit.
2. Confirm that "J_xxx/yyy_zz" (display1/display2) is shown on the
front display.
For your information:
"yyy" and "zz" shown to the right have nothing to do with the jitter value. "yyy" is the error
counter, while "zz" is the focus drive value.
Note:
Jitter value appears on the front display.
3. Play test disc T30 (center periphery).
4. Adjust tangential adjustment screw so that the jitter value is
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Adjustment point
Tangential adjustment
screw
Tilt adjustment screw
54
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Mode
T01 (inner periphery) play
T30 (center periphery)
play
T43 (outer periphery) play
Adjustment value
Adjust to the minimum jitter value.
Disc
DVDT-S20 [SPG]
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