SONY PMCD305
Manual de Servicio

The following is a simple adjustment method. � Simple Adjustment �
Note: Since exact adjustment cannot be performed, remember the positions of the controls before performing the adjustment. If the positions after the primary adjustment are only a little different, return the controls to the original position.

8. Connect the oscilloscope to TP (TRACKING-Y) and TP (VC) on the CD board. 9. Adjust RV704 so that the waveform is as shown in the figure below. (tracking gain adjustment)
VOLT/DIV: 1 V TIME/DIV:2 ms 0V

oscillosope (DC range) CD board TP (FOCUS-Y) TP (TRACKING-Y) TP (VC)
+ �

� Incorrect Examples (fundamental wave appears)
low tracking gain VOLT/DIV: 1 V TIME/DIV: 2ms 0V

Procedure: 1. Keep the set horizontal. If the set is not horizontal, this adjustment cannot be performed 2. 3. 4. 5. due to the gravity against the 2-axis device. Connect the oscilloscope TP (FOCUS-Y) and TP (VC) on the CD board. Insert the disc (YEDS-18) in and close the lid for CD. Put the set into test mode. (See page 30.) Press the ( button. From focus searching, focus is turned ON while entering CLV drawing-in mode. Tracking and sled are turned OFF. 6. Press the ( button. [Both tracking and sled are turned ON.] 7. Adjust RV702 so that the waveform is as shown in the figure below. (Focus gain adjustment)
VOLT/DIV: 100 mV TIME/DIV:2ms 100 mV 0V

high tracking gain high fandamental wave than for low gain VOLT/DIV: 1 V TIME/DIV: 2ms

0V

Note: VOLT/DIV: with the 10:1 probe in used.

10. Release test mode after adjustment is completed. � Inconnect Examples (DC level changes more than on adjusted waveform)
low focus gain VOLT/DIV: 100 mV TIME/DIV:2ms 250 mV 0V

Adjustment Location: CD board (See page 33.)

high focus gain VOLT/DIV: 100 mV TIME/DIV:2ms 100 mV 75 mV 0V

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