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SECTION
1
SERVICING NOTES
BLOCK OR BASE UNIT
The
laser diode
in the optical pick-up block
may
suffer
electrostatic breakdown because of the potential difference
generated by the charged electrostatic load, etc. on clothing
and the human body.
During repair, pay attention to electrostatic breakdown 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,
observe
more
than 25cm
away
from the
objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
1.
Turn POWER switch on with no disc inserted and make
Function switch to CD position.
Open the lid for CD.
Turn on $704 as following figure.
Press > key.
Confirm the laser diode emission while observing the
objecting lens. When there is no emission, Auto Power
Control circuit or Optical Pick-up is broken.
SM
eS
Objective lens moves up and down three times for the
focus search.
CHUCK PLATE JIG ON REPAIRING
On repairing CD section, playing a disc without the CD lid,
use Chuck Plate Jig.
© Code number of Chuck Plate Jig: X-4918-255-1
———~
Ges)
S
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