Mpp Offset Readjustment - Pioneer PDR-609 Service Manual

6.7.8 MPP Offset Readjustment

Test Point
Adjustment Value
Purpose
Symptom when Out of Adjustment
[Procedure]
1. Press the AUTO/MANUAL key and shift to the MPP Offset Readjustment.
(Press the AUTO/MANUAL key several times to appear the right indication.)
2. Monitor the TE waveform with VC.
Be careful with monitoring TE waveform instead of MPP waveform in the readjustment !
3. Adjust the JOG key so that TE offset becomes zero.
4. Press the ENTER key to register the adjustment.
CN102
5
TE
10: 1 prove
6
VC
CN102-pin 5 (Tracking err)
0 mV ± 50 mV
Optimizing DC offset voltage of tracking-error output circuit.
Playback does not function, incapable of searching, or track jumping.
Adjustment method
Oscilloscope
PDR-609
FL Indication
59