Playback Power Adjustment; Cd-R Record Power Adjustment - Pioneer PDR-W839 Service Manual

6.7 LD POWER ADJUSTMENT

6.7.1 Playback Power Adjustment

Test Point
Adjustment Value
Purpose
Symptom when Out of Adjustment
[Procedure]
1. Enter the Test mode.
2. Press the INPUT key so that "ANALOG" appears on the FL display.
3. Press the ERASE key so that "CD" appears on the FL display.
4. Move the pickup to the position where the power is easy to measure by pressing the SCAN key.
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5. Press the REC/REC MUTE and NAME key in order, and light the LD.
6. Turn the JOG key to adjust the power.
Switch the coarse adjustment and the fine adjustment by pressing the REC/REC MUTE key, and adjust it.
(initial state is the coarse adjustment.)
7. Press the ENTER key to register the adjustment if the power became the adjustment value.
8. Press the STOP key to goes out the LD, and adjustment is completed.

6.7.2 CD-R Record Power Adjustment

Test Point
Adjustment Value
Purpose
Symptom when Out of Adjustment
[Procedure]
1. Enter the Test mode.
2. Press the INPUT key so that "ANALOG" appears on the FL display.
3. Press the ERASE key so that "CD-R" appears on the FL display.
4. Move the pickup to the position where the power is easy to measure by pressing the SCAN key.
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5. Press the REC/REC MUTE and NAME key in order, and light the LD.
<Adjustment of CD-R Record Power>
6. Turn the JOG key to adjust the power.
Switch the coarse adjustment and the fine adjustment by pressing the REC/REC MUTE key, and adjust it.
(initial state is the coarse adjustment.)
7. Press the PLAY/PAUSE key to register the adjustment if the power became the adjustment value.
(assume the power when it was decided by A value)
When it is registered, shift to the Overdrive power adjustment automatically.
<Adjustment of CD-R Overdrive Power>
8. Turn the JOG key to adjust the power.
Switch the coarse adjustment and the fine adjustment by pressing the REC/REC MUTE key, and adjust it.
(initial state is the coarse adjustment.)
9. Press the ENTER key to register the adjustment if the power became the adjustment value.
10. Press the STOP key to goes out the LD, and adjustment is completed.
DANGER – LASER RADIATION WHEN OPEN.
AVOID DIRECT EXPOSURE TO BEAM.
Pickup objective lens
0.9 mW ± 0.05 mW
Optimizing playback power of laser diode.
Incapable of disc discrimination, playback, or track searches. Or track skipping.
Adjustment method
DANGER – LASER RADIATION WHEN OPEN.
AVOID DIRECT EXPOSURE TO BEAM.
Pickup objective lens
R REC : 4.3 mW ± 0.1 mW (=A value) ; R Over Drive : A value + 0.1mW ± 0.01 mW
Optimizing CD-R recording power of laser diode.
Incapable of CD-R recording, playing CD-Rs recorded on it. Sound pauses,
track skipping, or bad RF wave form (though no failure in playing CD).
Adjustment method
PDR-W839
FL Indication
FL Indication
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