Sony ta n 220 service manual

Page 1

TA-NZZD

SERVICE M'ANuiL "

US Model
Canadian Model

SPEC! FICATIONS

Audio power specifications

POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:

With 6 ohm loads, both channels driven,
from 20 - 20,000 Hz; rated 50 watts per
channel minimum RMS power, with no
more than 0.12 °/o total harmonic
distortion from 250 milliwatts to rated
output

Other specifications

Continuous RMS power output (both channels driven simultaneously)
Normal: 50 W x 4 (6 ohms, 0.12 %, 20 Hz < 20 kHz)
60 W x 4 (6 ohms. DIN)
BTL: 100W x2(8 ohms,0,12%,20Hz-20 kHz)
130 W x 2 (8 ohms DlN)
Power bandwidth (IHF)
12 Hz - 40 kHz (6 ohms. THU 05 °/o)
Frequency response 7 Hz - 100 kHz :dB
input sensitivity 370 mV (50 kohms)

Signal-temples ratio 90 (15 (input shorted)
Speaker output

Normal: 6 - 16 ohms
BTL: 8 A 16 ohms

General
System Complementary Dariington SEPP power amplifier with
all stages direct coupled
Power requirements
120 V AC. 60 Hz
Power consumption
US model: 260 W
Canadian model: 520 VA
Approx. 470 x 135 x 370 mm (w/h/d)
(18% x 5% x 14% inches)
including projecting pans and controls
Weight Approx. 10 kg (22 lb 7 oz). net
Supplied accessory Screws (4) (except for UK. model)

Dimensions

Desrgn and specifications are subject to change without notice.

Note
This appliance conforms with EEC Directive 87/308/EEC regarding
intenerence suppression.

STEREfl POWER AMPLIFIER

SONY;

Page 2

TA-N220

SAFETY CHECK-O UT

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 0.5 mA (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-S40A. 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-
meterr The limit indication is 075 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 2 V AC range are
suitable. (See Fig. A)

To Exposed Metal
Parts on Set

/ AC
voltmeter

0.75M 1: gum
_ (0.75 w
*4

7" Earth Ground

Fig. A. Using an AC voltmeter to check AC leakage,

SAFETY-RELATED COMPONENT WARNING

COMPONENTS IDENTIFIED BY MARK A OR DOTTED
LINE WITH MARK & 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 AUCOMPOSANT AYANT RAPPORT
A LA SECURITE!

LES COMPOSANTS IDENTIFIES PAR UNE MAROUE A
sun LEs DIAGRAMMES SCHEMATIOUES ET LA LISTE
DES PIECES som cnmouEs POUR LA sécumrE
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DEs PIECES sonv DONT LEs
NUMERos som- DONNES DANS CE MANUEL ou
DANS LES SUPPLEMENTS PUBLIEs PAR SONY.