Notes On Handling The Optical Pick-Up Block Or Base Unit; Notes On Laser Diode Emission Check; Model Identification - Sony CDP-X339ES Service Manual

Compact disc player
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CDP-X339ES
SAFETY
CHECK-OUT
(US Model)
After
correcting
the
original
service
problem,
perform the following safety check before releasing
the set to the customer:
LEAKAGE
TEST
The AC leakage from any exposed metal part to
earth ground and from all exposed metal parts to any
exposed
metal
part having a return
to chassis, must
not
exceed
0.5mA
(500
microampers).
Leakage
current
can
be
measured
by
any
one
of
three
methods.
1.
A
commercial
leakage
tester,
such
as
the
Simpson
229
or RCA
WT-540A.
Follow
the
manufacturers' instructions to use these instru-
ments.
to
A battery-operated AC milliammeter.
The Data
Precision
245 digital multimeter is suitable for
this job.
3.
Measuring the voltage drop across a resistor by
means
of a VOM
or battery-operated
AC volt-
meter.
The
"limit"
indication
is 0.75 V, so
analog
meters
must
have
an
accurate
low-
voltage
scale.
The
Simpson
250
and
Sanwa
SH-63Trd
are examples of a passive VOM
that
is suitable.
Nearly all battery
operated
digital
multimeters
that
have
a
2V
AC
range
are
suitable.
(See Fig. A)
To Exposed Metal
Parts on Set
|
AC
0.15 uF
S158
voltmeter
(0.75 V)}
=
Earth Ground
SAFETY-RELATED
COMPONENT
WARNING!!
COMPONENTS
IDENTIFIED
BY MARK
A OR DOTTED
LINE WITH MARK
A ON THE SCHEMATIC
DIAGRAMS
AND
IN THE
PARTS
LIST
ARE
CRITICAL
TO SAFE
OPERATION.
REPLACE
THESE
COMPONENTS
WITH
SONY
PARTS
WHOSE
PART
NUMBERS
APPEAR
AS
SHOWN
IN THIS MANUAL
OR IN SUPPLEMENTS
PUB-
LISHED
BY SONY.
For the United Kingdom and
European countries
This Compact Disc player
is classified as a CLASS 1
CLASS 1 LASER PRODUCT
LASER product.
LUOKAN 1 LASERLAITE
|
KLASS 1 LASERAPPARAT
The CLASS 1 LAS ER
PRODUCT label is located
on the rear exterior.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer
electrostatic breakdown because of the potential di-
ference 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 objec-
tive lens in the optical pick-up block. Therefore, when
checking the laser diode emission, observe from more
than 30cm away from the objective lens.
MODEL IDENTIFICATION
—Model
Number Label—
SONY.
mode no. cop-x339Es
A
eT
ES
SS
COMPACT DISC PLAYER
WLLL
LLL
US, CND model: AC: 120V 60Hz 23W
AEP model: AC: 220—230V~50/60Hz
UK model: AC: 240V~50/60Hz
CND
: Canadian model
ATTENTION
AU COMPCSANT
AYANT RAPPORT
A LA SECURITE!

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