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Strona główna >> PIONEER >> PDR-509/KU/CA Schematy
 
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PIONEER PDR-509/KU/CA
Schematy


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Opis PIONEER PDR-509/KU/CA Schematy

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Tekstowy podgląd strony 40 (kliknij aby zobaczyć)
PDR-555RW, PDR-V500, PDR-19RW, PDR-509

9.6.1 Verification of Disc Judgments
1. Tentative judgment by FZC (distinguishing between CD/CD-R and CD-RW) 2. Tentative judgment by checking the RF existence at TOCP < If RF exists >
The disc may be a finalized CD or CD-R/RW or an erased CD-RW. If the disc was judged to be a CD-RW in FZC tentative judgment, it remains judged as a CD-RW (the disc status is CD-R). If the disc was judged to be a CD/CD-R in FZC tentative judgment, it is tentatively judged to be a CD.

In the tentative judgment by checking the RF existence in LIA (99:00:00): If RF exists � Loads TOC, as there is a possibility that the disc is a finalized CD-R. If no RF exists � Makes a decision depending on the result of PMA loading, since the disc may be a partial CD-RW or blank CD-R. When the ATIP special information cannot be read, the disc is determined to be a CD. If the results of FZC tentative judgment and ATIP indicate it to be of a different type, a retry is made by reversing the result of FZC tentative judgment.

< If RF does not exist >
The disc has strong likelihood of CD-R or CD-RW. If the disc was judged as CD-RW in FZC tentative judgment, it is judged as CD-RW. If the disc was judged to be a CD/CD-R in FZC tentative judgment, it is judged to be a CD.

5. Disc-type determination by reading TOC
If MODE0 data are detected while reading TOC with CD-RW, the disc status is changed to Partial CD-RW and the operation shifts to PMA reading.

3. Tentative judgment (3) by checking the RF existence in LIA (99:00:00)
When the setup is finished with the results of tentative judgments 1 and 2, the RF existence is verified while searching for LIA (99:00:00) and executing AGC (gain adjustment).

9.6.2 Auto-Adjustments
9.6.2.1 Calibration of Tracking Offset Adjust Ability and Verification of the Temperature Sensor
These are carried out upon POWER ON and SETUP.

< If RF exists >
The results of the tentative judgment indicates: The CD may be a CD. The CD-R may be a finalized CD-R. The CD-RW may be finalized CD-RW or erased CD-RW.

(1) Calibration of the tracking offset adjustment ability
� When ADR_RFB and ADR_RFT are 1.5 to 3 V, the values are stored in VRB_REF and VRT_REF respectively. � When ADR_RFB are ADR_RFT are not 1.5 to 3 V, the modecontrol computer is notified through the TOKNG_F setting that the initial values for the RF envelope signal cannot be obtained. In this case, the mode-control computer generates a STOP command if the setup step is before PCA. The values are stored in VRB_REF and VRT_REF, respectively.

< If RF does not exist >
The result of the tentative judgment indicates: CD � no possibility The CD-R may be a partial CD-R or blank CD-R. The CD-RW may be a partial CD-RW or blank CD-RW.

4. Disc determination by reading the ATIP special information
If the result of tentative judgment indicates the disc is a CD-RW, and ATIP also indicates it is a CD-RW, the disc is determined to be a CD-RW. In the tentative judgment by checking the RF existence in LIA (99:00:00): If RF exists � Loads TOC, as there is a possibility that the disc is a finalized CD-RW. If no RF exists � Makes a decision depending on the result of PMA loading, since the disc may be a partial CD-RW or blank CD-RW. If both the result the tentative judgment and ATIP do not indicate it is a CD-RW, the disc is determined to be a CD-R.

(2) Verification of the temperature sensor
Upon POWER ON, the temperature sensor is checked whether the sensor shows a value within -15°C to 70°C. If it is out of the range, the sensor is judged defective, and subsequent operations are made in the temperature sensor defect status.

9.6.3 Tracking Error Level Adjustment and Disc Determination
The tracking error level adjustment and disc determination are simultaneously executed when a disc is inserted. The tentative judgment made in this stage checks the RF existence in the lead-in area. If RF exists, the disc is tentatively judged to be a CD. If no RF exists, the disc is tentatively judged to be a CD-R. However, if the result of the tentative judgment using FZC indicates it is a CD-RW, the disc is determined as CD-R regardless of the RF existence.

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