Sony STR-AV220 Service Manual page 2

STR-AV220,/AV320 |
Power requirements
120 V AC, 60 Hz
Power consumption
U.S.A. model: 100 watts (STR-AV320)
90 watts (STR-AV220)
Canadian model: 160 watts (STR-AV320)
: 140 watts (STR-AV220)
In standby condition: 5 watts (GTR-AV320 only)
AC outlets One switched (100 watts)
Dimensions Approx. 430 X 110 295 mm (w/h/d)
(17 X 4°/is X 11 °/s inches)
including projecting parts and controls
Weight Approx. 5.2 kg (11 Ibs 7 oz) net (STR-AV220)
Approx. 6.2 kg (13 Ibs 11 0z) net (STR-AV320)
Accessories supplied
Remote Commander RM-S103 (1)
(STR-AV320 only)
Sony batteries SUM 3(NS) (2) (STR-AV320 only)
FM wired antenna (1)
AM loop antenna (1)
Design and specifications subject to change without notice.
TABLE OF CONTENTS
Section Title Page
1. GNERAL
1-1, Location and Function of Controls-rrrrrrressrssserseeeees 3
2. ELECTRICAL ADJUSTMENTS -erceeerseeees f r e e eeeeren seats 4
3. DIAGRAMS
3-1, Block Diagram Per rT eRe RR TT TORE URC CTERT ETE Eee ee eee or 5
3-2, Semiconductor Lead Layouts rrrrsrrersssscesccesssescsssensene
3-3, Printed Wiring Boards — Main Section —-crrrrssssssrssees 9
3-4, Schematic Diagram —Main Section— ++ Moneniaesgeewres 13
3-5, Printed Wiring Boards —Tuner Section — cere: Ly
36, Schematic: Diagram —Tuner Section = s*+++s+s+ss9res 19
3-7, IC Block Diagrams ORO e Herre e ners rere Here reeeeeeeeseeeeeenereee 18
3-8. Explantion of IC801 ( £ PD75206) +-errrreeseeeeeesreee evens 21
4, EXPLODED VIEWS ccccerssscccctsesseeeeeseeeceenenneees frotoentands 23
5, ELECTRICAL PARTS LIST .
° Tuner Board eee ePeeTECCOE Cee Eee eCeRe Tee Tee eee SERS CEES Eee Cee ree reer rere) 26
° Except For Tuner Board Poem eee re reer erase errr ere reese ereesesseeses 28
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.
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.
SAFETY CHECK-OUT (US Model)
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.
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 0.75V, 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
O15 pF S15 kKQ voltmeter
(0.75 V)
"== Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
WARNING !!
ADVARSEL!
Lithiumbatteri— Eksplosionsfare
Udskiftning ma kun foretages
af en sagkyndig, og som
beskrevet i servicemanualen.
LITHIUM BATTERY
"Batteriet ma kun udskiftes med et batteri af samme
fabrikat og type'.
Because of the risk for explosion the battery must
be replaced with the same type and manufacture.