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SECTION 1
SERVICING NOTE
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
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.
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 “S curve check” in “CD section adjustment” and check
that the S curve waveform is output three times.
Note:
Be sure to connect all wires (including FFC) in the MD
section before applying power or ICs may be damaged.
DISC TABLE GETTING OUT PROCEDURE ON THE
POWER SUPPLY IS OFF
1. Insert the tweezers to a hole on bottom of the chassis as shown a
figure, then tern fully it toward direction 2.
2. Pull out the disc table.
cam
disc table
1
tweezers
2
3
PRECAUTIONS ON REMOVING WINDOW (FL) FROM
FRONT PANEL
• Use the following procedure to prevent scratches on the front panel.
1
Remove the Knob (VOL).
2
Remove the nut.
3
Remove the
ornament (VOL).
4
Remove the window (FL) using the notch.
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