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HCD-H7/H1500
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LASER DIODE AND FOCUS SERCH OPERATION CHECK
1.
Make POWER switch on with no disc inserted and disc
table closed.
2.
Confirm that the following operation is performed while
observing the objective lens.
@ Confirm that laser beam is spread.
@ Up and down motion of the objective lens. (3 times)
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH
TURNS OFF
BOTTOM
VIEW
FRONT
ON
OFF
+
( 3 (DISC TRAY OPEN)
'
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, observe from more than 30 cm away from the
objective lens.
(1) Insert to @ for tapering driver, etc., and turn in the
direction of arrow OFF. (Disc tray open)
(2) Tray as come
out little of front panel, pull out in the
direction of arrow @ by hand.
—4—
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