Pioneer avic-d1 Service Manual page 170

1
- Skew adjustment
The skew adjustment is to adjust the pickup and the flatness of the disc so that the beam from the pickup
continues to go to the disc vertically. In MS3 mecha, the pickup shaft on the inner track near the carriage
A
motor is fixed, so the fixed position is regarded as the standard and the flatness is adjusted. Observing the
RF waveform on the oscilloscope, repeat the adjustment on the inner track position and the outer track position,
and narrow the adjusted value.
If any of the following replacements have been performed on the system, adjustments for pick up,
must be conducted:
1. Pick up unit replacement
2. Spindle motor replacement
3. Carriage chassis replacement
4. Pick up unit main shaft replacement
5. Pick up unit sub-shaft replacement
B
Measurement device and tools
Disk used
Measurement reference
Measurement point
Connection diagram
DVD core unit
C
D
E
F
170
1
2
: Oscilloscope
Allen key wrench
Screw lock (GYL1001)
: GGV1018
: GND1
: RFOUT
GND1
AVIC-D1/UC
2
3
RFOUT
Oscilloscope
3
4
4