Technics SA 303 Service Manual

Page 1

ORDER No. 308001-1660

Service Manual

FMIAM Stereo Receiver

, SA-303

[E]. [EG]. _[XGH],
[XAL [XAL]

SA-303(K)

[E]. [EG], [XGH]

*The colors of this model include silver and black.
The black type model is provided with (K) in the
Sarvice Manual.

Areas

* [E] and [EG] are available in Scandinavia and European

[XGH] is available in Holland,

* [XA] is available in Asia, Latin America, Middle East
and Africa.

* [XAL] is available in Australia.

SA-303IK)

l CONTENTS

TECHNICAL SPECIFICATIONS ................. 1~3 INSTRUCTIONS D'ALIGNEMENT IFRANGAISI. . . . . .12~13
NOTE..... .....3 BLOCKDIAGRAMOFIC'S..................13~15
LOCATION OF CONTROLS . PRINTED CIRCUIT BOARD WIRING VIEW. 14~1S

DISASSEMBLY INSTRUCTIONS . . . . TERMINAL GUIDE OF TRANSISTORS AND ICS. . . . . . 18
BLOCK DIAGRAM ............. . . . EXPLODED VIEW . . ........ . . 19~20
ADJUSTMENT POINTS ................ REPLACEMENT PARTS LIST . . . . . 21~22
ADJUSTMENT INSTRUCTIONS (ENGLISH) . . , SCHEMATIC DIAGRAM . . . . . . . . 23~24
ANWEISUNGES FUR ABGLEICHUNG (DEUTSCH) . .10~1I REPLACEMENT PARTS LIST ................. 25~26
TECHNICAL SPECIFICATIONS Specifications are subject to change without notice for further improvement.
[DIN 45 500]
AMPLIFIER SECTION Powerhandwidlh
both channels driven, -3 dB 10 Hz ~35 kHz 14m
20 Hz ~ 20 kHI continuous power output Damping [actor ' 1014(1). 20mm
both channels driver- 2 x 42W 44m, 2 x 40W 80) Input Mammy and impedance mono 2.5 mvmm
40 Hz ~ I6 kHz continuous power output AUX 150 mV/27kQ
both channels driven 2 x 42W 14012 x 40Wl8 m TAPE 2 150 mV/27kn
1 kHz cominuous power output TAPE 1 REC/PLAY 180 mV/27kfl
both channelsdrivln 2 x 50w14m,2 x 45W18m pHoNo "mama. input voltage (1 kHz, RMS) 150 mV
Total harmonic distortion 0 08% 14m 0 04% (80) S/N
mad power as 20 Hz ~20 kHz . , n p 70 dB (80 dB, IHF, ABC)
rated power at no Hz ~16 kHz 0080/n 1401,0049u (an) mm pm I I IBM 88 dB 195 dB, ma, A, an)
rated power at 1 kHz 0.04% (Am, 004% (an) _26 as um", um pHONo , p 64 dB
hall power It 20 Hz ~20 kHl 0.025% (an) AUX 66 dB
half power at I kHz 0.009% (80) 50 mw power (4!!) PHONO 62 dB
-26 113 power at 1 kHz 0.1% (40) AUX - 82 dB
50 mW power a! 1 RH! 012% (40) Frequency response PHONO RIAA standard curve
Intermodulation dismnion . to ads (30 H1 ~15 kHz)
mod powomzso Hz:5kHz= 6:1,40 0.08% Aux 7Hz~45kHZ (E1 dB)
rated power at 60 H1: 7 kH1=4:l, SMPTE, Sn 0 04% $0.2 dB(20 H2 ~20 kHz)

Matsushita Electric Trading Co., Ltd.

TeChnics Po. Box 288, Ceniral Osaka Japan

Page 20

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I O | llfNESIEk-ron | . El 5 II 3 Notes:
| I | M I g a 3:; o 34;, PL 2 1. S1-1~S1-6: Selector switch in "FM" position. (D AM <4 ® PM --> @pr
ol I I 32 g "3 3" 3 2. 82-1 ~ 82-3: FM muting/mode switch in "on/FM auto" position.
In El I I K I 3. 83-1 ~83-3: Tape monitor I switch in "source" position. Source H tape 1
2 5' I I it 4. 84-1 ~S4-3: Tape monitor 2 switch in source" position. source tape 2
\\ :I | - DeoI~ nos P 5. 85-1, 5-2: Loudness switch in off" position.
|l I \\ MA I 5 O 5 6. 86-1, 6-2: High filter switch in "off" position.
I | I 7. 87-1, 7-2: Power display range switch in "X1" position ®X0_1H®X1-v
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I I PL 8. 88-1, 8-2: Speakers selector switch in "main" position ® remote +- ®
I I \\ g A N 6875 9 89' Power source switch in "on" position
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I I 0 GD 9 I: I LED COMPARATOR 10. S10: Voltage adjuster switch in "240V" position. 120V « 110V -
I I \\' h _ PL5 11. Indicated voltage values are the standard values for the unit measured by
| I '2 69 § I with the chassis taken as standard, Therefore, there may exist some erron
l I \\ impedance of the DC circuit tester.
| I 44 69 g PLs I:| Not apply signal to set and muting switch to OFF condition,
I | ' a I I AM signal reception.
I | \\_ g I '- _I FM muting to ON condition.
I | "6 98 my ( ) FM stereo signal reception,
I I Q - 7 12_ :2»??? AI: signal lines. I=(> FM signal lines. AM signal lines.
I I Eco: } ' 7 13. A indicates that only parts specified by the manufacuturer be used for safet
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3 I I I' 3 PL9 ThIs unIt uses a shortmg SWItoh. As Illustrated below, the CITCUH Is sht
E I I 44 GD I30 I Ic :02 A N 6875 In the circuit diagram, the shaded area represents the common terminz
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