Sony ta 313 service manual 2

Page 1

~ *' ~, INTEGRATED

SPECIFICATIONS

SAFETY-RELATED COMPONENT WARNING !!

COMPONENTS IDENTIFIED BV SHADING AND A
MARK ON THE SCHEMATIC DIAGRAMS,EXPLODED
VIEWS 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 SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT
A LA SECURITE !

LES COMPOSANTS IDENTIFIES PAR UN TRAME ET
UNE MARQUE sun LEs DIAGRAMMES SCHE-
MATIOUES, LEs qus EXPLosEEs ET LA LISTE
DES PIEcEs som CRITIQUES POUR LA sEcumTE
DE FONCTIONNEMENT. NE REMPLACER cEs
COMPOSANTS QUE PAR DES PIECES SONY DONT
LES NUMERos SONT DONNES DANS cE MANUEL
ou DES SUPPLEMENTS Pusués PAR SONY.

M

Power Requirements:

Power Consumption:

AC Outlaw

(Canadian model)

Dimensions:

Weight:

1;,28IEREOL(AMPLIFIER;

240V ac, 50 Hz (UK model)

220V ac (or 120 or 240V ac adjustable),
50 Hz (AEP model)

120, 220, or 240 V ac adjustable, 50/60 Hz
(E model)

120V ac, 60 Hz (Canadian model)

200W (UK model)
170W (AEP, E model)
85 W (Canadian model)

1 switched, 100 W
2 unswitched, local 200W

Approx. 410 (w) x 145 (h) x 280 (d) mm

16% (w) x 53/. (h) x 11% Id) inches
including projecting parts and controls.
Approx. 6.5 kg, 14 lbsoz (net)

Approx. 7.3 kg,16lb 202 (in shipping
carton)

- Continued on page 2 -

SONY;

SERVICE MANUAL

Page 2

TA-3'l 3

AMPLIFIER SECTION

Continuous RMS
Power Output: Both channels driven simultaneously
(rated output) At 2 - , Hz
(Less than 0.5% (BIL), 25+ 25W(Sn)
0.7% (4 S1) harmonic At 1 kHz
distortion) 28+ 28W (881)
According to DIN 45500
25 + 25 W I8 (I)

Power Bandwidth: 15 Hz -- 30 kHz (89), IHF

Harmonic Distortion: Less than 0.5% at rated output
Less than 0.2 % at 1 W output

IM Distortion: Less than 0.5% at rated output
(60 Hz : 7 kHz = 4: 1) Less than 0.2% at 1 W output

Frequency Response: PHONO RlAA equalization curve 20.5113
Mm 100 Hz - 10 kHz:gdB

TUNER + 0
AUX }10Hz-50kHz _3dB
TAPE

Tone Controls: BASS :8 dB at 100 Hz
TREBLE :8 dB at 10 kHz

Loudness: +8 dB at 100 Hz, art. 30 dB

Damping Factor: 30 (8 0,1 kHz)

Inputs: Maximum Input 8/" (weighting
Sensitivity Impedance Capability (at 1 kHz, network, input
0.5 % distortion) level)
7 dB
PHONO 2.5 mV 50 kn 100 mV 6
(A, 2.5 mV)
MIC 2 .0 mV 10 kS'Z - -
TUNER
AUX 100mV 50 kn - A 95dB
TAPE ( . 1 50 mVI
Outputs: REC OUT Voltage 150 mV | impedance 10 kn
HEADPHONES Accepts low and high impedance headphones
Accepts speakers of 8 4 16 :2 (Canadian model)
SPEAKER or 4 - 16 n (AEP, UK, E model)

0 MODEL IDENTIFICATION
- Specification Label-

OdB = 0.775 V

UK model E model
r
INTEGRATED STEREO AMPLIFIER INTEGRATED STEREO AMPLIFIER
SONY!) MODEL N0 TA-3I3 SONY® MODEL NO TA7313
DAIGEN

DAIGEN AC 240V ~ 50 Hz 200 W
MADE IN JAPAN

SERIAL NO

ACIZO, 220, 240V ~ 50/60 Hz I70W
MADE IN JAPAN

SERIAL NO.

. l

AEP model Canadian model
INTEGRATED STEREO AMPLIFIER INTEGRATED STEREO AMPLIFIERI
SONW MODEL No TAGIS SONY MODEL NO. mm
AC 220V~ 60 Hz I7OW DAIGEN AC 120V 60 Hz 85W
MADE IN JAPAN MADE IN JAPAN
SERIAL NO. SERIAL NO.
- Power Cord -

E model: euro-plug (1-551-530-00)

III

E model: parallel-blade plug (1-534-487-XX)

SECTION 1

TA-3'l 3

OUTLINE

1-1. REVERBERATION CIRCUIT

The TA-313 is equipped with a built-in rever-
beration unit designed to add a reverberation effect
to the input signals from the MIC and TUNER input
terminals. An outline of this circuit is shown in
Fig. 1. This unit generates reverberation by the
spring method, rather than the steel plate or echo
room methods.

Fig. 2 illustrates the basic operating principle
which employs a moving-magnet (MM)-type converter
element.

Operating Principle

L301 in Fig. 1 serves as the actual reverberator
unit, employing L1 as the load resistance for Q303.

When a signal is applied to the base of Q303,
the amplified signal flows through L1, and a magnetic
fieldwill be generated as shown in Fig. 2, resulting
in the Ll magnet being forced to rotate in a certain
direction. The spring connected to the L1 magnet
will also be forced to move in concert with the L1
magnet. But since the other end of this spring is
connected to L2 magnet (again see Fig. 2), the
current change in L1 will be transferred via the spring
to L2, The movement of the L2 magnet then induces
an electric current in the coil (in the same way as in
a moving-magnet type cartridge), resulting in the
voltage being applied to Q304. The time taken to
transfer the signal from L1 to L2 is approx. 25 m sec.

In this way, signals applied to the base of Q303
are transferred to Q1304 via L301 with the determined
time delay. This action alone, however, will not
produce the reverberation effect.

When the input signal ceases, the spring which
has been forced to rotate together with the Ll
magnet, will naturally tend to return to its original
position, pulling the magnet back with it. But it
will overshoot its original position, and wil oscillate
(together with the magnet) for a short while until
it finally Comes to rest in its original position. This
rotational oscillation action will result in the magnets
at both ends (L1 and L2) overshooting their original
positions a number of times, consequently generating
proportionally smaller currents in both coils. Signals
producing the reverberation effect are thus applied
to Q304.

This oscillating spring behaviour may be more
readily understood from the illustration in Fig. 3
which shows how a weight attached to the end of
a spring gradually returns to its original position
after being pulled down.

The signal from the L2 magnet is amplified by
Q304 and Q305, and then applied to the mixing
control RV301 via C312, R314 and R313. The signal
applied to the base of Q303 is also applied directly
to the mixing volume control RV301. RV301 adjusts
the relative levels of the reverberated signal and non-
reverberated signal, operating in much the same way
as an ordinary balance control.

D +
g: :. output signal
63%: I322 : Ito mixingl
R '4 R I control}
H "D
030 32
R '0 0303 Rvsol

. 0 3
Input
signal L_39|
FE . E
I U. .L

T

Fig. 7

lL2 side}

input

magnet

magetic field

r

- n
I r I _
. "fl ~,.
5? :I-J
\ ,- _.i
Fig. 2
\ \ \ \ \ \\
l l « i , é,
a a S a
)4 \ > s ..
> / 5
spnng\§ > g 3 5
s 3 S
5 g // \ \ % E
e 2 \ 5
s --s »~-I :wfl was
\\. 2 /1 «é, / /
weight < /
. \ / Final/y returned to

I

original position.
Gradual return to original position
by oscillating up and down.
Weight pulled away from
original position.

original position

Fig. 3