Sony CDP-557ESD - Servicing Notes; Optical Pick-up Handling; Laser Diode Safety

CDP-557ESD/707ESD
SERVICING NOTES
~NOTES ON HANDLING THE OPTICAL PICK- NOTES ON LASER DIODE EMISSION CHECK
UP BLOCK OR BASE UNIT
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. There-
fore, when checking the laser diode emission, observe
more than 25 cm away from the objective lens,
The laser diode in the optical pick-up block may
suffer electrostatic breakdown because of the poten-
tial difference generated by the charged electrostatic
load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break- LASER DIODE AND FOCUS SERCH OPERA-
down and also use the procedure in the printed TION CHECK
matter which is included in the repair parts. 1. Remove disc pully by lifting up chucking arm by
The flexible board is easily damaged and should be hand, (Fig. A, B)
handled with care.
2. Make POWER switch on with no disc inserted and
disc table closed.
3. Confirm that the operation indicated in Fig. C is
ADVARSEL!! performed while observing the objecting lens.
Under service ma gjnene ikke komme ner objektiv-linsen
pa den optiske pick-up enhed. | tilfeelde af at det er : KY
ngdvendigt at kontrollere udsendelsen af laserlys, skal
det ske i en afstand af mere end 25cm fra den optiske
pick-up.
LASER
ADVARSEL
MARKNING
rig.
A
Remove
here
at first.
Felgende merkning findes indvendig i apparatet:
1. Advarsel Mzerkning
CAUTION ; INvisiBLE LASER RADIATION WHEN OPEN
AND INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.
ADVARSEL ~ usyntiG LASERSTRALING VED A®BNING
NAR SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION UNDGA
UDSATTELSE FOR STRALING.
4 885 843 02
VAROITUS: Laite sisaltaa, laserdiodin, joka lahettaa
(nakymatonta) silmille vaarallista lasersateilya. Fig. B
Lift up chucking arm by hand in
the direction of arrow.
(1) Confirm that laser beam is spread.
(2)
Up
and
down
motion
of
the
objective
lens.
(3
times}
Fig. C