Pioneer CX-3250 Service Manual page 158

1
A
- 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)
B
Disc used:GGV1025
Measurement reference: AGND3
Measurement point: RF
Connection drawing
DVD core unit
C
D
E
Symptom in case the adjustment is not adequate: Worsening of the error rate 10
F
* Caution: Do not look into the laser light during adjustment.
158
1
2
AGND3
AGND3
RF
RF
Expansion
-4
(Normally 10 or less.)
Large RF jitter
RF waveform distortion
Tracking drawing/Unstable servo
AVIC-X930BT/XNUC
2
3
Oscilloscope
-3
3
4
4