NOTES ON HANDLING THE OPTICAL PICK-UP BLOCKSECTION 1
OR BASE UNITSERVICING NOTE
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference gAbout CD-TEXT displaenerated by they
charged electrostatic load, etc. on clothing and the human bodyThis unit is pro.vided with a simple CD-TEXT display function.
During repair, pay attention to electrostatic brThe CD-TEXT contents of 20 tracks are displayed on the fluores-eak-down and also
use the procedure in the printed matter which is included in thecent display tube.
repair parts.Since the function is simple, some special characters may not be
The flexible board is easily damaged and should be handled withdisplayed, or may be displayed as other characters.
care.
NOTES ON LASER DIODE EMISSION CHECK
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.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the OS curve check� in OCD section adjustment� and check
that the S curve waveform is output four times.
� 4 � |
ACEC
SONY
