AVD-K800P
LEAKAGELaser component in this product is capable of emitting radiation
The AC leakage from any exposed metal part to earth Ground and
from all exposed metal parts to any exposed metal part having aexceeding the limit for Class 1.
return to chassis, must not exceed 0.5 mA (500 microampers).
Leakage current can be measured by any one of three methods.This appliance is classified as a
1. A commercial leakage tester, such as the Simpson 229 or RCACLASS 1 LASER product.
The CLASS 1 LASER
WT-540A. Follow the manufacturersO instructions to use these
instruments.PRODUCT MARKING is
located on the rear exterior.
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 aThe following caution
label is located inside
VOM or battery-operated AC voltmeter. The Olimit� indication
is 0.75 V, so analog meters must have an accurate low-voltagethe apparatus.
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)
CAUTIONTo Exposed Metal
Use of controls or adjustments or performance of proceduresParts on Set
other than those specified herein may result in hazardous
radiation exposure.
Notes on chip component replacementAC
0.15?Fvoltmeter
YNever reuse a disconnected chip component.1.5k&
Y Notice that the minus side of a tantalum capacitor may be(0.75V)
damaged by heat.
Flexible Circuit Board Repairing
YKeep the temperature of soldering iron around 270uCEarth Ground
during repairing.
Fig. A. Using an AC voltmeter to check AC leakage.Y Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
Y 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.
SAFETY CHECK-OUT
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size.)
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, Ometallized� knobs, screws,
: LEAD FREE MARK
and all other exposed metal parts for AC leakage. Check leakage asUnleaded solder has the following characteristics.
described below.
Y Unleaded solder melts at a temperature about 40°C higher than
ordinary solder.
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!
Y Strong viscosity
Unleaded solder is more viscous (sticky, less prone to flow) than
ordinary solder so use caution not to let solder bridges occur such
as on IC pins, etc.
Y Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
SAFETY-RELATED COMPONENT WARNING!!ATTENTION AU COMPOSANT AYANT RAPPORT
� LA S?CURIT?!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITHLES COMPOSANTS IDENTIF?S PAR UNE MARQUE 0 SUR LES
MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTSDIAGRAMMES SCH?MATIQUES ET LA LISTE DES PIéCES SONT
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESECRITIQUES POUR LA S?CURIT? DE FONCTIONNEMENT. NE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERSREMPLACER CES COMPOSANTS QUE PAR DES PIéSES SONY
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTSDONT LES NUM?ROS SONT DONN?S DANS CE MANUEL OU
PUBLISHED BY SONY.DANS LES SUPP?MENTS PUBLI?S PAR SONY.
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ACEC
