Pioneer PDR-609, Service Manual

Page: 58 / 90

58
PDR-609
[Procedure]
1. Press the AUTO/MANUAL key and shift to the SPP Offset Adjustment.
2. Monitor the MPX waveform with VC.
2. Adjust the JOG key so that SPP offset becomes zero.
3. Press the ENTER key to register the adjustment.
6.7.6 SPP Offset Adjustment
0 mV
±
50 mV
CN102-pin 3 (MPX) Test Point
Adjustment Value
Optimizing DC offset voltage of sub-signal output circuit.
Playback does not function, incapable of searching, or track jumping.
Purpose
Symptom when Out of Adjustment
Adjustment method FL Indication
CN102
MPX
VC
3
6
10: 1 prove Oscilloscope
[Procedure]
1. Press the AUTO/MANUAL key and shift to the Tracking Gain (MS MIX) Adjustment.
2. Move the Pickup to center of the disc by pressing the SCAN key. (
1 ¡
)
3. Monitor the MPX signal and set a CD disc.
4. Press the FINALIZE key to FOCUS IN.
5. Press the PLAY/PAUSE key to turn the SPINDLE. (CAV)
6. Adjust the JOG key so that MPX waveform (MPP+SPP) becomes minimum.
7. Press the ENTER key to register the adjustment.
8. Press the STOP key to stop the disc rotation.
6.7.7 Tracking Gain adjustment
Minimize (MPP+SPP)
CN102-pin 3 (MPX) Test Point
Adjustment Value
Matching gains of pickup main signal output and sub-signal output.
Playback does not function, or incapable of searching.
Purpose
Symptom when Out of Adjustment
Adjustment method
FL Indication
CN102
MPX
VC
3
6
10: 1 prove Oscilloscope
39k
Ω
0.001
µ
F