Disc used:TDV-582
Measurement reference: AGND3
Measurement point: RF
Expansion
Oscilloscope
RF
AGND3
- SKEW adjustment
When one of the following replacements has taken place, SKEW adjustment for the pick up will be required.
(1) Replacement of the pick up unit
(2) Replacement of the spindle motor
(3) Replacement of the carriage chassis
(4) Replacement of the main shaft of the pick up unit
Measurement equipment and tools/jigs: Oscilloscope
Driver for SKEW adjustment -> Driver
Bond for fixing the SKEW -> GEM1033
Bond for resonance -> 1530 (1530 : produced by THREE BOND)
Bond for locking the screw -> 1401M (1401M : produced by THREE BOND)
Connection drawing
DVD core unit
Symptom in case the adjustment is not adequate: Worsening of the error rate 10
(Normally 10 or less.)
Large RF jitter
RF waveform distortion
Tracking drawing/Unstable servo
* Caution: Do not look into the laser light during adjustment.
-3
-4
RF
AGND3
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