Technics SU 500 Service Manual

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0? C 7 5) ORDER NO. HAD8604494C8 71

ervlce Manual

\ / , , 1/
V Stereo Integrated Amplifier 01693 10? I: Amplifier

SU-500

Color
(KI - - ~ - Black Type
(S) - ~ - - Silver Type

Color Area

(KIIS) [E] ..... Continental Europe
(KIISI [EH] Holland
(KIIS) [EB] . . .. Belgium

(KIISI [EF] . . . . France

(KIiS) [EK] . .United Kingdom
(KHS) [EG]. .F. R. Germany
iKIiS) [Ei] ..... Italy

iKIiS) [XL] . . .. Australia

(KIISI [XA] . . . . Asia, Latin America,
Middle Near East,
Africa 8: Oceania

SPECIFICATIO NS
(3 (DIN 45 500)
I AMPLIFIER SECTION Tone controls
BASS 50 Hz, +10 d8~~10 dB
40 Hz~20 kHz continuous power output TREBLE 20 kHz, +10 dB~-1O dB
both channels driven ~ ' 2 X 40W (80) Loudness control (volume at -30 d3) 5Q Hz. +9 dB
1 kHz continuous power output Output voltage and impedance
both channels driven 2 X 50W (80) REC OUT 150 mV
Total harmonic distortion Channel balance, CD/AUX 250 Hz~6,300 Hz :1 dB
rated power at 40 HzNZO kHz 005% (80) Channel separation, AUX 1 kHz 45 dB
halt power at 1 kHz 0.03% (80) Headphones output level and impedance 470 mV/3300
/" lntermodulation distortion Load impedance
{ 3 rated power at 60 Hz: 7 kHz=421 SMPTE, 80 , 0.05% MAIN or REMOTE 40~160
V Power bandwidth ' MAIN and REMOTE an~16n
both channels driven, --3 dB 10 Hz~25 kHz (8!), 0.05%) _-
Damping lactor - 50 (an) I GENERAL
, Inputsensitivity and impedance * '
PHONO , 25 mV/47kn Power consumption 250W
TUNERyéD/AUX - 150 mV/22kn Power supply /
t TAPE/EXT 150 mV/22kfl For Auatralia and United Kingdom AC 50 Hz/60 HZ, 240V
" PHONO maximum input voltage (1 kHz, RMS) 150 mV For continental Europe AC 50 Hz/GO Hz, 220V
SIN For others AC 50 Hz/GO Hz,110V/127V/220V/240V
rated power (8!!) Dimensions (WXHXD) 43W 86 X 240 mm
PHONO 71 dB (IHF, A: 72 dB) (16-15/16' X 3- 3/8" X 9-7/16")
TUNER, CD/AUX, TAPE/EXT 90 dB (IHF, A: 98 dB) Weight 47 kg (10.4 lb.)
Frequency response
0 ., PHONO RIAA standard curve Note:
é- 'V iO-B 53 (30 HZ~15 kHZ) Total harmonic distortion is measured by the digital spectrum
TUNER, CD/AUX, TAPE/EXT 5 Hz~7o kHz (~3 dB) analyze, (Hp. 3045 system).

Specifications are subject to change without notice for further
improvement.

_ > .
I eChnlCS Matsushita Electric Trading Co., Ltd.
r Po. Box 288. Central Osaka Japan

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I TECHNISCHE DATEN
(DIN 45 500)

I VERSTARKERTEIL

Dauerion-Ausgangslelstung bei 40 Hz ~ 20 kHz
' bei'de KirIiiIe ausgeéteiiert 2 X 40W (8 o)
on-Ausgangsteistung bei 1 kHz
siae Kafifile afsgeste'uefl V 2 X 50W (3 o)
Gesamtkllrrtaktor
Nennleistung beHO Hz ~ 20 kHz 0.05% (B Q)
halbe Nennleistung bet 1 kHz 0,03% (8 r2)
tntermodulationstaktor
Nennteistung bel 60 Hz: 7 kHz = 4:1, nach SMPTE, B (I

Leistungsbandbreite
beide Kanale ausgesteuert bei -3 dB
10 Hz ~25 kHz (8 (1, 0,05%)
Dimptungsialttor 50 (8 o)
Eingangsemptindtichkelt und -Impedanz . 7

Phono 2,5 mV/47 m

Tuner, CD/Aux ' ' 150 mV/22 k0
TAPE/EXT ' 150 "IV/22 ko
Maximale TA-Eingangsspannung (1 kHz, ell. ) 150 mV
Geriuschspannungsabstand ,
Nennleistung (8 Q) _ , '
Phono , 71 as (nach MP, A: 72 dB)

' Tuner, CD/Aux, TAPE/EXT90 dB (nach IHF, A: 98 dB)

0,05%: -

Frequenzgang _
'Phono " ' r » EIAA- Standardkurve,
:tOBdB (30Hz'~:15kHz)

Tuner;CD/Aux, Tape/EXT 5 Hz ~ 70 kHz (- 3 dB)

Klangregler

BaBregIor (BASS) _ « - ~ 50 Hz, +10 dB ~-10 dB

Ho'henregler (TREBLE) 20 kHz, +10 dB ~-10 dB
Gehiirrichtlge Leutstfirkekorrektur (Loudness)
.,~w(hei.=30_dB,Ausgancheistun9).. ,7 WW 50 Hz, +9 :13
Ausgangsspanmmg und -lmpedanz

Autnahmeausgang (REC OUT) 150 mV
Kanalabwelchung (CD/Aux, 250 Hz ~ 6300 Hz) i1 dB
Obersprechdfimptung (Aux, 1 kHz) 45 dB
Kopthiirerpegel und -impedani 470 mil/330 O
Lautsprecherimpedanz

- MAIN oder REMOTE 4 Q ~ 16 0

MAIN und REMOTE , __ 8 0 ~16 O
I ALLGEMEINE DATEN _
Leistungsauinahme ' ' 250w
Netzspannung

Ftlr Konttnontateuropa Wechselstrom 50 Hz/60 Hz, 220V
Filr endere Lender Wechselstrom 50 Hz/60 Hz,
110V/127V/220V/240V

Abmessungen (BXHXT) 430 X 86 X 240 mm
Gewlcht 4.7 kg
Bemerkung:

Der Gesamtklirriaktor wurde mit einem digitalen Rausch~
spektrometer (Anlage H.P. 3045) gemessen.

I ESPECIFICACION ES (DIN 45 500)
I SECCION AMPLIFICADOR

Potencie continua de 40 Hz~20 kHz

en ambos canales 2 X 40W (80)
Potencia continua de 1 kHz

en ambos canales , 2 X 50W (80)
DistorsiOn armonica total

potenoia de regimen a 40 Hz~20 RM: 0.05% (80)

Initad de potencia a 1 kHz . 0,03% (8Q)

Distorslon por intermodulacién
potencla de regimen a 60 Hz: 7 kHz=4:1, SMPTE, an
0,05%
Ancho de banda de potencla
con ambos canales, -3 dB 10 Hz~25 kHz (80, 0,05%)

Factor de amortiguamiento 50 (80)
Sensibitidad a Impedancia de entrada
TOCADISC. (PHONO) 2,5 mV/47kn
SINTON., CD/AUX. (TUNER, CD/AUX) 150 mV/22k0
GRAB/EXT (TAPE/EXT) 150 mV/22k0

Voltaie maximo de entrails de PHONO (1 kHz, HMS) 150 mV
Relacién de serial a ruldo
potencia de regimen (so)
TOCADISC. (PHONO)
SINTON., CD/AUX., GRAB/EXT
(TUNER, CD/AUX, TAPE/EXT) 90 dB (IHF, A: 98 dB)
Respuesta de Irecuencla
TOCADISC. (PHONO)

71 dB (IHF, A: 72 dB)

curva RIAA estandar
$0.8 dB (30 Hz~15 kHz)

SINTON., co/Aux., GRAB/EXT
(TUNER, co/Aux, TAPE/EXT)
5 Hz~7o kHz (~3 dB)

Controles de tono

BAJOS (BASS) 50 Hz, +10 dB~'~10 dB

AGUDOS (TREBLE) 20 kHz, +10 dB~-10 dB
Control de sonoridad (volumen a -30 dB) 50 Hz. +9 dB
Volteje e lmpedancta de salida

SAL. GRAB. (REC OUT) ' 150 mV
Equilibrio de canales, CD/AUX 250 Hz~6 300 Hz :1 dB
Separactdn de canales, AUX 1 kHz 45 dB

Impedancia y nivel de salida de los auriculares 470 mV/BSOO _
Impedancia do carga

MAIN 0 REMOTE 40~160
MAIN y REMOTE 80~160

I GENERAL
Consume de energla I 250W

Alimentacién de energia
Para Europa continental CA 50 Hz/60 Hz, 220V
Para otrus paises CA 50 HZ/60 Hz, 110V/127V/220V/240V
Dimensions: (An.XAI.XProt.) 430 X 86 X 240 mm
Peso 4,7 kg

Nata:
La distorsién arménica total se mide con el analizador de

espectro digital (sistema H.P. 3045),
(Estes especificationes estIIn sujetes a cualquier cambio

(Die technischen Date" kannen infolge von Verbesserungen ohne sin previo eviso.)

Ankii ndigu n9 geendert warden.)
I CO NTENTS

PROTECTION CIRCUITRY . . . . . . .

I CARACTER'STIQUES _ I L L, I; E (/3 BEFORE REPAIR AND ADJUSTMEN

LOCATION OF CONTROLS . . . . . . . SCHEMATIC DIAGRAM .....
DISASSEMBLV INSTRUCTIONS . . . . . REPLACEMENT PARTS LIST .
, , _ _ , _ _ , RESISTORS & CAPACITORS . . . . ...... EXPLODED VIEW , ............

SYNTONISATEUR, CD/AUX, BANDE/EXT, : _ I

"ER'°°""E"" I PROTECTION cmcunnv

PRINTED CIRCUIT BOARDS . . . .

l
l

(DIN 45 500)

I SECTION AMPLIFICATEUR

Puissance de sortie continue de 40 Hz~20 kHz, ' 5 H2540 kHZ' (73 dB)

Re I d I l H'
9 39° 3 3 °3 ' e The protection circuitry may have operated if either of the iollciwing conditions Is noticed:

les deux canaux en circuit , ' , 2 X4OW (80) ~ ~ I
Pulslsasnge do sortie continue: 1 ttHz I , , - 2X 50w 80 ' , 2§::?:::Bsfé) ' 221:: :13 3:: o No sound :5 heard when the power is switched 0N.
Dismisioflfiimgfe"$3: 1 ' _ ( ) Compensateur physiologique (volume a-ao an) 50 Hz, +9 dB _ 0 Sound stops during a performance. ,
a puissance "0mm"; (40 Hz~20 kHz) __ A 0 05% (80) Tongs; or? Eszrtlie sea 2:21:52; T , , g g (\ 3 The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires
._ - - , I o- (REC OUT) 150 "1V - v are "shorted" or if eaker stem with n im ed nce Ie than the ndcated ted 'm f ' '
a dem mam (1 H" 0'03 ° (30) Equilibrage des canaux, co/Aux 250 Hz~6 300 Hz :l:1 dB ' Sp 3y 5 a p a SS I ' m I pedance 0 ms um are used

If this occurs, follow the procedure outlined below: ,-
1. Switch OFF the power.

Distorsion dinlermodulation

~ 3 pulssance nominate a so Hz: 1 kHz:4:1, supra, an Sépa'°" d "3 AUX 1 Hz * , ~ 45 5

Niveau de sortie des casques at Impedance 470 mV/330fl

V2.5 We.

Réponse de Iréquences 095% Impedance de charge 2. Determine the cause of the problem and correct it.
les deux canaux en circuit _3 dB PRINCIPALE bu AUXILIAIRE (MAIN or REMOTE)4n 160 , , 8, Switch ON the power once again.
10 Hz~25 kHz (80. 0,05%) ,' Note: .
Coettlcient damorussement - 50 (an) PRINCIPALE 9', AUXIVL'A'RE (MAIN and IREMOTEJQMSD When the protection circuitry functions. the unit will not operate unless the power is first switched OFF and then ON again.
Sensibilité et impedance dentrée , -o- «r:-
PHONO 2 5 inV/47kn - L
' I DIVERS *S. I
SYNTONISATEUR, CD/AUX (TUNER, CID/Ausxgmvmm T _ _ r: , , . ; I BEFORE REPAIR AN D ADJUSTMENT
Consommaton _ _ a . . . .
aANDE/EXT(TAPEIEXT) 150 mV/22kn . I ' 250W (1) Turn off the power supply Usmg a 109, 5W resistor, shortcircuit both ends of power supply capaCItors (C901 , C902,
PHONO (tension dentrée maximum. 1 kHz HMS) 150 mV A"'::::,::mpe CA 50 mm Hz 220v 5:. 4700 in order (0 discharge (he voltage
st IIB It . , " r ' . .
9' ru Autres CA 50»Hz/60 Hz, 110V/127V/220V/240V . (2) Before turning the power supply on. after completion of repair, slowly apply the prImary voltage by usmg a power
a pulssance nominate (an) , D t
PHoNo 71 dB (IHF, A: 72 d3) Imenslons (LXHXP') 430 X 86 X 24° mm . supply voltage controller to make sure that the consumed current at 50/60 Hz In NO SIGNAL mode should be shown
SYNTONISATEUR, CD/AUX, BANDEIEXT P°"" 4'7 9 1 _ below with respect to supply voltage 1 10V/127V/220V/240V.
Ré d(TfUéNER, CD/AUX,TAPE/EXT) BOdBV (IHF. A: 98 dB) R ( ( j
ponse e r quenoe emarque: x ,/
PHONO Courbe nominale FtIAA On mesure Ia distorsion harmonique totale au moyen (1' un I Power supply voltage ACIIOV AC1Z7V ACZZOV AC240V

analyseur de spectre digital (Systeme H P 3045) 50Hz 130 ~ 290mA 120 ~ ZGOmA 65 ~ 145mA 60 ~ 140mA

i0,3 dB (30 HZfIS kHz)
Consumed current

60Hz 120 ~ ZBOmA 110 ~ 250mA 60 ~ l40mA 60 ~130mA

(Sujet é chengement sans prearisl

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