Sony ta ax 311 service manual

Page 1

IA-Ax3I_I

SERVICE-MANUAL

US Model
Canadian Model
E Model
Australian Model

SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:

With B-ohm loads, both channels driven,
from 40 - 20,000 Hz; rated 110 watts per
channel minimum HMS power, with less than
0.9% total harmonic distortion from 250
milliwatts to rated output.

Inputs
Sensitivity Impedance
PHONO 30 mV 50 kohms
TUNER, CD. 250 mV 50 kohms
VIDEO, TAPE

SAFETY-R E LATED COMPON ENT WAR NING II

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.

Output REC OUT: Voltage 250 mV. impedance
1 kohm
SPEAKER: Accepts speakers of B to 16 ohms
HEADPHONES: Accepts headphones with low
and high impedance
Frequency response
PHONO: RIAA curve
TUNER/CDNIDEO/TAPE: (30 Hz - 30 kHz :3 dB
GRAPHIC EOUALIZER controls
Boost/Cut range:
i8 dB (100 Hz, 330 Hz, 1 kHz, 33 kHz)
16 dB (10 kHz)

Dimensions Approx. 430 x 145 x 360 mm (w/h/d)
(17 x 55/. x 14la inches)
Weight Approx. 9.5 kg (20 lb. 15 02,)

Design and specifications subject to change without notice.

ATTENTIoN Au coMPQSANT AYANT RAPPORT
A LA SECURITEI

LES COMPOSANTS IDENTIFIEs PAR UNE MAHOUE A
sun LEs DIAGRAMMES scuEMATIQUEs ET LA LISTE
DES PIECES SONT CRITIQUES POUR LA sEcURITE
DE FONCTIONNEMENT. NE REMPLACER CES com.
FOSANTS QUE PAR DES PIECES sonv DONT LES
NUMERos SONT DONNEs DANS CE MANUEL ou
oANs LES SUPPLEMENTS PUBLIEs PAR SONY.

INTEGRATED STEREO AMPLIFIER
S 0 NE

Page 2

TA- AX31 1

SAFETY CH ECK-OUT TABLE OF CONTENTS

After correcting the original service problem, Section Title Page
perform the following safety check before releasing
the set to the customer:

| . . SPECIFICATIONS ..................................... 1
Check the antenna terminals, metal trim, metallized
knobs, screws, and all other exposed metal parts for
AC leakage. Check leakage as described below. 1- GENERAL """""""""""""""""""""" 3
LEAKAGE TEST 2-D'AGRAMS
2- 1. Description on ICIOl( uPD75206-717-3BE) ----- 6
The AC leakage from any exposed metal part to 2_2. Key operation ................................... 3

earth ground and from all exposed metal parts to any

exposed metal part having a return to chassis, must 2-3 Circuit Boards Location """"" ' 12
not exceed 0.5 mA (500 microampers) Leakage 24- Semiconductor Lead L3Y°Ut5 ' 13
current can be measured by any one of three 2-5. Printed Wiring Boards ----------- ~14
methods. 2.5 Schematic Diagram ............................ 19
l. A commercial leakage tester, such as the 2-7. IC Block Diagrams ----------------------------- 24
Simpson 229 or RCA WT-540A. Follow the
manufacturers instructions to use these instru- 3- EXPLODED VIEWS
ments.
2 Ab d C 11 Th D 3-1. Overall Section 1 .............................. 25
. attery-operate A mi iammeter. e ata .
-2, 11 s t 2 .............................. 25
Precision 245 digital multimeter is suitable for 3 Overa ec 10D
this job.
4. ELECTRICAL PARTS LIST -------------------------- 27

3. Measuring the voltage drop across a resistor by

means of a VOM or battery-operated AC volt-

meter. The limit indication is 0.7SV, 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 3 2V AC range are

suitable. (See Fig. A)
MODEL IDENTIFICATION
-- Specification Label -

To Exposed Metal
Part: on Set

SONYo MODEL NO. TA-AX311

INTEGRATED STEREO AMPLIFIER

A C
/ voltmeter

0.15 F I élr5kn
u (0.75V)

'7' Earth Ground

SERIAL NO.

Fig. A. Using an AC voltmeter to check AC leakage. MADE .N JAPAN

US, Canadian models : AC 120V. 60Hz
200W (U) 400VA (CA)
Australian model : AC 220V~50/60Hz 220W
E model : AC 120/220/240V~50/60H2
220W