Safety Check-Out - Sony CDP-2700 Service Manual

CDP-2700
Accessories Supplied
For European model: AC power cord (2)
For U.S.A. and Canadian model: AC power cord (1)
AC plug adaptor (1)
Rack mount adaptor (1) (including four screws (M4 x 25) with
washers, four screws (M5 x 12) and four washers)
Instruction manual (1)
For the United Kingdom
This Compact Disc
player is classified as a
CLASS 1 LASER PRODUCT CLASS 1 LASER
LASER KLASSE 1 product.
LUOKAN 1 LASERLAITE The CLASS 1 LASER
PRODUCT label is
located on the rear
exterior.
KLASS 1 LASERAPPARAT
NOTES ON HANDLING THE OPTICAL PICK-UP
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.
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.
SAFETY CHECK-OUT
After correcting the original service problem,
perform the following safety check before releasing
the set to the customer:
Check the antenna terminals, metal trim, "'metallized"'
knobs, screws, and all other exposed metal parts for
AC leakage. Check leakage as described below.
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.
2. <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
voltmeter
(0.75)
= Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
ATTENTION AU COMPOSANT AYANT RAPPORT
A LA SECURITE!
LES COMPOSANTS IDENTIFIES PAR UNE MARQUE /\
SUR LES DIAGRAMMES SCHEMATIQUES ET LA LISTE
DES PIECES SONT CRITIQUES POUR LA SECURITE
DE FONCTIONNEMENT. NE REMPLACER CES COM.
POSANTS QUE PAR DES PIECES SONY DONT LES
NUMEROS SONT DONNES DANS CE MANUEL OU
DANS LES SUPPLEMENTS PUBLIES PAR SONY.