Spp Offset Adjustment; Tracking Gain Adjustment - Pioneer PDR-W839 Service Manual

6.8.6 SPP Offset Adjustment

Test Point
Adjustment Value
Purpose
Symptom when Out of Adjustment
[Procedure]
1. Press the AUTO SPACE 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.
CN102
3
MPX
10: 1 prove
6
VC

6.8.7 Tracking Gain adjustment

Test Point
Adjustment Value
Purpose
Symptom when Out of Adjustment
[Procedure]
1. Press the AUTO SPACE key and shift to the Tracking Gain (MS MIX) Adjustment.
2. Move the Pickup to center of the disc by pressing the SCAN key. (
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.
CN102
39kΩ
3
MPX
0.001µF
6
VC
CN102-pin 3 (MPX)
0 mV ± 50 mV
Optimizing DC offset voltage of sub-signal output circuit.
Playback does not function, incapable of searching, or track skipping.
Adjustment method
Oscilloscope
CN102-pin 3 (MPX)
Minimize (MPP+SPP)
Matching gains of pickup main signal output and sub-signal output.
Playback does not function, or incapable of searching.
Adjustment method
10: 1 prove Oscilloscope
41 ¡¢ )
PDR-W839
FL Indication
FL Indication
71