73
PDR-W839
[Procedure]
1. Press the AUTO SPACE key and shift to the Focus Bias Adjustment.
2. Press the SYNCHRO key to perform the average process.
\
"OPTICAL" disappears on the FL display when completed.
3. Move the Pickup to center of the disc by pressing the SCAN key. (
41 ¡¢
)
4. Monitor the jitter value and set a CD disc. (use the jitter meter)
5. Press the FINALIZE key to FOCUS IN.
6. Press the PLAY/PAUSE key to turn the SPINDLE. (CAV)
7. Press the PLAY/PAUSE key to TRACKING ON. (EFM CLV)
8. Adjust the JOG key so that jitter value becomes minimum.
9. Press the ENTER key to register the adjustment.
\
Shift to the RFDC Level Adjustment automatically.
10. Adjustment is completed automatically.
\
Each display the reason that became abnormal when adjustment was not completed normally.
When did not converge in limit of adjustment possibility
(when it became the lowest level)
When failed in writing to the EEPROM
11. Press the STOP key to stop the unit.
Caution:
In this adjustment, shift to the RFDC Adjustment when pressing the ENTER key before step 9, and there is
it when completed in normal on the indication.
However, must not omit operation of steps 7 from 5 because RFDC is not adjusted to normal when
pressing the ENTER key with the state that steps 7 from 5 are not executed.
• The arbitrary value that "
∗ ∗
" modified it by adjustment.
• "?" is not displayed in the point that selected an item with the AUTO SPACE key, and blink when changes setting value by the input
of the JOG key. Press the ENTER key to register the setting value, and disappear the FL indication that the setting value is stored in
the EEPROM by normal.
6.8.9 Focus Bias Adjustment
Minimize jitter value
CN102-pin 2 (RF)
Test Point
Adjustment Value
Optimizing DC offset voltage of focus servo loop circuit including pickup.
Focus-in does not function, sound pauses, bad RF wave form, or incapable of
playing some discs.
Purpose
Symptom when Out of Adjustment
Adjustment method
FL Indication
CN102
RF
VC
2
6
10: 1 prove
Oscilloscope
Summary of Contents for PDR-W839
Page 21: ...PDR W839 21 A B C D 5 6 7 8 5 6 7 8 3 5 A A 1 5 A 2 5 A 4 5 A 1 5 Servo Amp IC Multiplexer ...
Page 39: ...PDR W839 39 ...
Page 51: ...PDR W839 51 A B C D 5 6 7 8 5 6 7 8 H PNP1480 C SIDE A CN502 A 301 CN302 A ...
Page 53: ...PDR W839 53 A B C D 5 6 7 8 5 6 7 8 H IC601 Q492 Q401 Q428 IC1811 IC901 Q490 Q481 1 SIDE B ...
Page 56: ...PDR W839 56 A B C D 1 2 3 4 1 2 3 4 I L HEAD PHONE ASSY L OPERATING1 ASSY I IC701 Q708 ...
Page 94: ...94 PDR W839 Pin Function 1 5 PDC069 CD R CORE ASSY IC501 Encoder IC ...
Page 95: ...95 PDR W839 Pin Function 2 5 ...
Page 96: ...96 PDR W839 Pin Function 3 5 ...
Page 97: ...97 PDR W839 Pin Function 4 5 ...
Page 98: ...98 PDR W839 Pin Function 5 5 ...
Page 103: ...103 PDR W839 ...
