Sony ta ax 320 service manual

Page 1

AX320

SERVICE MANUAL

US Model
Canadian Model
AEP Model

UK Model

E Model

SPECIFICATIONS

(For the USA and Canadian models)
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:

With 8ohm loads, both channels driven,
from 20 - 20,000 Hz: rated 80watts per
channel minimum RMS power, with no
more than 0.08% total harmonic distor-
tion from 250 milliwatts to rated output.

OTHER SPECIFICATIONS

Amplillor section

Continuous RMS power output
(both channels driven AI 1 kHz
simultaneously) 70 + 70 walls (5% THD. 8 ohms)
(AEP, UK, E model) 60 + 60 watts (0.08% THD, a ohms)(AEP,
UK model )
At 40 Hz - 20 kHz
55 + 55 watts (0.08 /o THD, 8 ohms)
According to DIN 455OOIAEF, UK model)
55 + 55 watts (5 ohms)
Peak music power output (Emodell
400 walls (5% THD. 8 ohms)
Music power output (E model)
200 watts (5 "/o THD. Bohms)
(IHF)
10 Hz - 30 kHz
Dynamic headroom
1.2 dB (78 IHF)

Power bandwidth

Harmonic distortion
Less than 0.08% at rated output
Inlermodulation (IM) distortion
(50 117 kH1=4=1i Less than 008% at rated output
Frequency response
PHONO: FIIAA equalization curve 10.5 dB
ELéNEFI

TAPE
VIDEO (audio)

10 Hz - 100 kHz 12.0 dB

Residual noise
Damping Inctor

Less than 100 V (B ohms, network A)

50 (8 ohms. 1 kHz)
- Continued on page 2 -

SA FETY-RELATED COMPONENT WARNING I!

COMPONENTS IDENTIFIED BY SHADING AND 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 PUBLISHED BY SDNV.

ATTENTION Au COMPOSANT AYANT RAPPORT
A LA sEcuanEl

LES COMPOSANTS IDENTIFIES PAR UNE TRAME ET
UNE MARQUE A SUR LES DIAGRAMMES SCHE-
MATIOUES ET LA LISTE DES PIECESSONT CRITIQUES
POUR LA SECURITE DE FONCTIDNNEMENT. NE REM-
PLACER CES COMPOSANTS OUE PAR DES PIECES
SONY DONT LES NUMEROS SONT DONNES DANS CE
MANUEL DU DANS LES SUPPLEMENTS PUBLIES PAR
SONY.

INTEGRATED SIEREII AMPLIFIER

MICROFILM

SONY;
rm

Page 2

'I'A-AX3 2O

Inputs
SIN (weighting
Sensitivity Impedance network. Inpul level)
74 ea
PHONO an mV so kllohms 73 aa'
(A. 2.0 mV)
YUNER
on 100 dB
up: iso mV so kllohms 5 43'
VIDEO (A, 150 mV)
1. 2 (audio)
'78 IHF
Outputs REC OUT
Voltage 150 mv
Impedance 4.1 kilohms
VIDEO OUT
Voltage 1 V (p-p)
Impedance 75 ohms
SPEAKER
Accepts speakers of 8 - 16 ohms.
HEADPHONES
Accepts low and high Impedance head-
phones.
Tone controls BASS
:10 dB at 100 Hz (turnover lreq. 300 Hz)
TREBLE

:10 dB at 10 kHz (turnover ireq. 3 kHz)

Bass boost conrol
+ 6.0 dB (60 Hz)

-----------------.o.o---- -o-o,-.--o-o-oo------o.o .-

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 0.5 mA (500 microampers). Leakage
current can be measured by any one of three
methods.

I. 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.

General
System Preamplifier section: low-noise IC NF type
equalizer amplifier
Power ampiltler section : quasi-
complementary SEPP OTL OCL power
ampllller with all stages direct coupled
Power requirements
AEP model: 220 V ac (or 240 V ac adjustable by
authorized Sony personnel), 50/60 Hz
UK model : 240 V ac (or 220 V ac adjustable by
authorized Sony personnel). 50 Hz
US, Canadian model : 120V ac. 60 Hz
E modal : 120, 220, or 240 V ac
adjustable, 5060 Hz
Power consumption
AEP, E model :125w
UK model :120 W
US model: 135 W
Canadian model: 290 VA
AC outlets
AEP. UK model: 3 switched, total 100 watts max.
Us. Canadian, E model: 2 switched, total 100 watts max.
and 1 unswitched, 100 watts max.
Dimensions
AEP modal: Approx. 430 x 105 X 255 mm (wlhld)
(17 x All. x 10v. Inches)
UK,US, Canadian, E model: Approx. 430 x 105 x 250 mm
(wlhld) (17 x 4v- ): 97/. Inches)
including projecting parts and controls
Approx. 5.9 kg (13 lbs) net
Approx. 6.5 kg (14 lbs 202) In shipping
carton

Weight

---- -o.-. oooono onoooo'oooooo

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 2 2V AC range are
suitable. (See Fig. A)

To Exposed Metal
Pans on Set

AC
0.15uF 1.5km / voltmeter
(0.75 V]

'._l

'3? Earth Ground

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

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