CDP-D500 - Sony Audio Service Manual (repair manual). Page 4

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The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.

The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission, ob-
serve from more than 30 cm away from the objective lens.

1. Make POWER switch on with no disc inserted and disc table

closed.

2. Confirm that the following operation is performed while ob-

serving the objective lens.

Front Panel side

1

Confirm that laser beam spread.

2

Up and down motion of the objective lens. (3 times)

Insert a tapering driver into the aperture of the unit bottom,
and turn to the direction of arrow.

* To close the disc tray, turn the driver in the reverse direction.