Rfom Offset Adjustment; Mpp Offset Adjustment - Pioneer PDR-W839 Service Manual
Compact disc recorder / multi-cd changer
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Also See for PDR-W839:
- Operating instructions manual (84 pages) ,
- Quick start manual (2 pages) ,
- Operating instructions manual (52 pages)
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PDR-W839
6.8.4 RFOM Offset Adjustment
Test Point
Adjustment Value
Purpose
Symptom when Out of Adjustment
[Procedure]
1. Press the AUTO SPACE key and shift to the RFOM Offset Adjustment.
2. Monitor the RFDC waveform with VC.
2. Adjust the JOG key so that RFDC offset becomes zero.
3. Press the ENTER key to register the adjustment.
CN102
2
RF
10: 1 prove
6
VC
6.8.5 MPP Offset Adjustment
Test Point
Adjustment Value
Purpose
Symptom when Out of Adjustment
[Procedure]
1. Press the AUTO SPACE key and shift to the MPP Offset Adjustment.
2. Monitor the MPP waveform with VC.
2. Adjust the JOG key so that MPP offset becomes zero.
3. Press the ENTER key to register the adjustment.
CN102
4
MPP
10: 1 prove
6
VC
70
CN102-pin 2 (RF)
0 mV ± 30 mV
Optimizing DC offset voltage of RFDC output circuit when playing back.
Focus-in does not function, incapable of searching, or track skipping.
Adjustment method
Oscilloscope
CN102-pin 4 (MPP)
0 mV ± 50 mV
Optimizing DC offset voltage of main signal output circuit.
Playback does not function, incapable of searching, or track skipping.
Adjustment method
Oscilloscope
FL Indication
FL Indication
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