HCD-BC150/BC250
SAFETY CHECK-OUT
After correcting the original service problem, perform the followingLaser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, Ometallized� knobs, screws,
and all other exposed metal parts for AC leakage.
This appliance is classified as
Check leakage as described below.
a CLASS 1 LASER product.
LEAKAGE TESTThe CLASS 1 LASER
PRODUCT MARKING is
The AC leakage from any exposed metal part to earth ground and
located on the rear exterior.
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
CAUTIONLeakage current can be measured by any one of three methods.
Use of controls or adjustments or performance of procedures1. A commercial leakage tester, such as the Simpson 229 or RCA
other than those specified herein may result in hazarWTdous radiation-540A. Follow the manufacturersO instructions to use these
exposure.instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
Notes on chip component replacement3. Measuring the voltage drop across a resistor by means of a
? Never reuse a disconnected chip component.VO M or battery-operated AC voltmeter. The Olimit� indication
? Notice that the minus side of a tantalum capacitor may beis 0.75 V, so analog meters must have an accurate low-voltage
damaged by heat.scale. The Simpson 250 and Sanwa SH-63Trd are examples
of a passive VOM that is suitable. Nearly all battery operated
Flexible Circuit Board Repairingdigital multimeters that have a 2 V AC range are suitable. (See
? Keep the temperature of the soldering iron around 270 °CFig. A)
during repairing.
? Do not touch the soldering iron on the same conductor of the
To Exposed Metal
circuit board (within 3 times).Parts on Set
? Be careful not to apply force on the conductor when soldering
or unsoldering.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.AC
(Caution: Some printed circuit boards may not come printed with0.15 ?F1.5 k&voltmeter
(0.75 V)
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
? Unleaded solder melts at a temperature about 40 °C higherEarth Ground
than ordinary solder.
Fig. A. Using an AC voltmeter to check AC leakage.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
? Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
? Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
ATTENTION AU COMPOSANT AYANT RAPPORT
� LA S?CURIT?!
SAFETY-RELATED COMPONENT WARNING!!
LES COMPOSANTS IDENTIFI?S PAR UNE MARQUE 0 SUR
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINELES DIAGRAMMES SCH?MATIQUES ET LA LISTE DES
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND INPIéCES SONT CRITIQUES POUR LA S?CURIT? DE
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSEQUE PAR DES PIéCES SONY DONT LES NUM?ROS SONT
PA RT NUMBERS APPEAR AS SHOWN IN THIS MANUAL ORDONN?S DANS CE MANUEL OU DANS LES SUPPL?MENTS
IN SUPPLEMENTS PUBLISHED BY SONY.PUBLI?S PAR SONY.
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ACEC
