Automatic Adjustment; Automatic Adjustment Start - Pioneer PDR-W839 Service Manual

PDR-W839

AUTOMATIC ADJUSTMENT

6.8.10 Preparation
Test Point
Discs to be Used
[Procedure]
1. Press the INPUT key so that "OPTICAL" appears on the FL display.
\ If it was not displayed the Focus Offset Adjustment, press the AUTO SPACE key and shift to the
Focus Offset Adjustment.
2. Monitor the MPX signal with VC and set a CD disc.
CN102
3
MPX
10: 1 prove
6
VC

6.8.11 Automatic Adjustment Start

[Procedure]
1. Press the REC/REC MUTE key to start the automatic adjustment.
\ Execute it from "6.8.1 preparations" to "6.8.6 SPP Offset Adjustment" of the Manual Adjustment
automatically. And stop by the state that selected an item of next "6.8.7 Tracking Gain Adjustment" once.
6.8.12 Tracking Gain Adjustment
Test Point
Adjustment Value
Purpose
Symptom when Out of Adjustment
[Procedure]
1. Move the Pickup to center of the disc by pressing the SCAN key. (
2. Monitor the MPX signal with VC and set a CD disc.
3. Press the FINALIZE key to FOCUS IN.
4. Press the PLAY/PAUSE key to turn the SPINDLE. (CAV)
5. Adjust the JOG key so that MPX waveform (MPP+SPP) becomes minimum.
6. Press the ENTER key to register the adjustment.
\ Stop the disc rotation and Excute "6.8.8 MPP Offset Readjustment" automatically. And select an item
of next "6.8.9 Focus Bias Adjustment", and stop with the state completed to average processing.
CN102
39kΩ
3
MPX
10: 1 prove
0.001µF
6
VC
74
CN102-pin 3 (MPX)
CD test disc (STD-903)
Method
Oscilloscope
Method
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
Oscilloscope
41 ¡¢ )
FL Indication
FL Indication
FL Indication