Pioneer AVIC-D3/XU/UC Service Manual page 170

1
- SKEW adjustment
When one of the following replacements has taken place, SKEW adjustment for the pick up will be required.
A
(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
(5) Replacement of the sub shaft of the pick up unit
Measurement equipment and tools/jigs: Oscilloscope
Disc used: GGV1018
B
Measurement reference: AGND2
Measurement point: RF
Connection drawing
DVD core unit
C
D
E
Symptom in case the adjustment is not adequate: Worsening of the error rate 10-3
* Caution: Do not look into the laser light during adjustment.
F
170
1
2
Driver for SKEW adjustment t TORX driver (T2) (GGK1095)
Bond for fixing the SKEW (GEM1033)
Bond for locking the screw (Locking agents (1401M : produced by THREE BOND))
RF
AGND2
Enlargement
(Normally 10-4 or less.)
Large RF jitter
RF waveform distortion
Tracking drawing/Unstable servo
AVIC-D3/XU/UC
2
3
Oscilloscope
3
4
4