Technics SU-V2X User manual

ORDER NO. HAD84072860C8
Service
Manual
Amplifier
Stereo
Integrated
Amplifier
S
U
-
Vx
Computer Drive New Class A
Color
(K) --+- Black Type
(S) ---+ Silver Type
Color Area
(K)(S) | [E)----- Switzerland and Scandinavia
(S) | [EF] ---- France
(K)(S) | [Ei] ---- Italy
(K)(S) | [EK]---- United Kingdom
(K)(S) |[EH].--- Holland
(K)(S) | [EGA]--- F.R. Germany
(K)(S) | [EB] ---- Belgium
(K)(S) |[XA] +--+ Asia, Latin America, Africa,
Middle Near East and
Oceania
(K){S) |[XL] --- Australia |
SPECIFICATIONS
(DIN 45 500)
Frequency response
@ AMPLIFIER SECTION PHONO RIAA standard curve
+0.8 dB (30 Hz~15 kHz)
1 kHz continuous power output TUNER, CD, VIDEO/AUX,
both channels driven 2x50 W (4Q) TAPE 1/DA TAPE, TAPE 2 5 see 5 bee ete
250 W (8Q) +0, —0.2 dB (20 Hz~ z)
20 Hz~20 kHz continuous power output eae ee ad a dB
both channels driven 2x45 W (4Q) ubsonic filter Z,- oct.
2x45
W
(8Q)
Loudness
control
(volume
at
—30
dB)
50Hz,
+9dB
Total
harmonic
distortion
pee
ana
rated power at 20 Hz~20 kHz 0.03% (40) REC OUT 150 mV
0.005% (8) Channel balance, VIDEO/AUX 250 Hz~6,300 Hz +1dB
rated
power
at
1
kHz
0.007%
(4Q)
Channel
separation,
VIDEO/AUX
1
kHz
60 dB
0.003% (8) Headphones output level and impedance 450 mV/3300
half power at 20 Hz~20 kHz 0.003% (8Q) Load impedance
half power at 1 kHz 0.001% (8Q) MAIN or REMOTE AN~ 160
Intermodulation distortion MAIN and REMOTE 80~160
rated power at 250 Hz: 8 kHz=4:1, 8Q 0.03%
rated power at 60 Hz: 7 kHz=4:1, SMPTE, 8 0.005%
Power bandwidth m@ GENERAL
both channels driven, —3 dB 5 Hz~40 kHz (40, 0.03%) : BaEW
5 Hz~50 kHz (82, 0.02%) Sibel seer
; ower supply
Peatkaiey
pores
ae
For
United
Kingdom
AC
50H
2/60
Hz,
a eatin Bree ee! 110 V/120 V/229 V/240V
I ra :
peace Pee sana 2.5 mV/47 kQ For continental Europe AC 50 H2/60 Hz, 220V
TUNER, CD, VIDEO/AUX 150 mV/22 kQ For others ste eu en ee Be
1 V/22 kQ
SaonG Lane Ligue: baer eee Dimensions (WxHxD) 430 x97:< 290 mm
maximum
input
voltage
(1
kHz,
RMS)
160
mV
(16-18/16"x3-27/32"x)
4-7/16")
ly Weight 6.3 kg
rated power (40) (13.9 Ib)
PHONO 76 dB (IHF, A: 83 dB) Note: fe
TUNER, CD, VIDEO/AUX, . oe eae <n
TAPE
1/DA
TAPE,
TAPE
2
91
dB
(IHF,
A:
102
dB)
Total
harmonic
distortion
is
measured
by
the
digital
spectrum
T analyzer (H.P. 3045 system).
one controls
BASS 50 Hz, +10 dB~—10 dB Specifications are subject to change without notice fo; further
TREBLE 20 kHz, +10 dB~—10 dB improvent.
: ; e h he Matsushita Electric Trading Co., Ltd.
Cc hn1icS P.O. Box 288, Central Osaka Japan

@ CONTENTS
Page
PROTECTION CIRCUITRY .....-. 2.00.2 0s eevee nneee 2
BEFORE REPAIR AND ADJUSTMENT ..........22028. 2
LOCATION OF CONTROLS... .... 2.5.0 ee eee eee 2,3
DISASSEMBLY INSTRUCTIONS .............2..002. 4~6
TERMINAL GUIDE OF TRANSISTORS, DIODES AND IC’S.... 6
FUNCTION OF TERMINAL
1C601 (IcQ control)... ee 7
1C401 (Analog function control)... . 2... 2. ee ee 8
Mi PROTECTION CIRCUITRY
The protection circuitry may have operated if either of
the following conditions is noticed:
@ No sound is heard when the power is turned on.
@ Sound stops during a performance.
The function of this circuitry is to prevent circuitry
damage if, for example, the positive and negative speaker
connection wires are ‘‘shorted’’, or if speaker systems
with an impedance less than the indicated rated im-
pedance of this unit is used.
Page
CIRCUIT BOARDS AND WIRING CONNECTION
DIAGRAM). |.c3-605 Seetcce 5a Saree ee eek ae a 9,10
PRINTED CIRCUIT BOARDS ................00- 11~13
BLOCK DIAGRAM .... 2... 2.2... ee ee te ee 14,15
SCHEMATIC DIAGRAM ... 1... . . eee ee ee 16~20
RESISTORS & CAPACITORS .............00 00205 ae 21
REPLACEMENT PARTS LIST............ 02000 eu uue 22
EXPLODED VIEW iota ce eae ek Goa ae Oe ae 23, 24
If this occurs, follow the procedure outlines below:
1. Turn off the power.
2. Determine the cause of the problem and correct it.
3. Turn on the power once again.
Note
When the protection circuitry functions, the unit will not
operate unless the power is first turned off and then on
again.
M@ BEFORE REPAIR AND ADJUSTMENT
1. Disconnect AC power, Discharge both Power Supply Capacitors C701 and C702 (8200uF) through a 102, 5W resistor
to ground.
DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may distroy solid state devices.
2. After repairs are completed, restore power gradually using a variac, to avoid overcurrent.
Current consumption at 50/60Hz in NO SIGNAL mode should be shown below with respect to supply voltage 110V/
120V/220V/240V.
Power supply voltage AC110V
AC120V AC220V AC240V
Hi LOCATION OF CONTROLS
Operation indicator
Computer drive automatic indicator
Power switch
igirtbons
(bass)
Tone controls] |
(treble)
Tone switch ( HL defeat, = on)
Subsonic fitter switch ( HL off, = on}
170 ~360mA
90 ~ 200mA 80 ~180mA
Balance control
Audio muting switch ( off —»—20dB)
Loudness switch ( 9 off, = on)
Volume control
é Recording output
4}. signal indicator
{et Input signal
: indicator
Selectors
(tape 1/DA tape}
Recording mode switch
Recording mode indicator

ESPANOL
ESPANOL
@ ESPECIFICACIONES
(DIN 45 500)
m@ SECCION AMPLIFICADOR
Potencia continua de 1 kHz
en ambos canaies 2x50 W (4Q)
2x50 W (8Q)
Potencia continua de 20 Hz~20 kHz
en ambos canales 2x45 W (4Q)
2x45 W (8Q)
Distorsio6n armonica total
potencia de régimen a 20 Hz~ 20 kHz 0,03% (49)
0,005% (8Q)
0,007% (4Q)
0,003% (8Q)
0,003% (8Q)
0,001% (8Q)
potencia de régimen a1 kHz
mitad de potecia a 20 Hz~20 kHz
mitad de potencia a 1 kHz
Distorsion por intermodulacion
potencia de régimen a 250 Hz: 8 kHz=4:1, 8Q 0,03%
potencia de régimen a 60 Hz: 7 kHz=4:1, SMPTE, 8Q
0,005%
Ancho de banda de potencia
en ambos canales, —3 dB 5 Hz~40 kHz (4Q, 0,03%)
5 Hz~50 kHz (8, 0,02% )
0,9 mV
30 (4Q), 60 (8Q)
Zumbido residual y ruido
Factor de amortiguamiento
Sensibilldad e impedancia de entrada
TOCADISC. (PHONO) 2,5 mV/47 kQ
SINTON., DISCO COMPACTOR, VIDEO/AUX.
(TUNER, CD, VIDEO/AUX) 150 mV/22 kQ
GRAB. 1/DIGITAL, GRAB. 2.
(TAPE 1/DA TAPE, TAPE 2) 150 mV/22 kQ
Voltaje maximo de entrada de PHONO (1 kHz, RMS)
Relacion de sefal a ruido
potencia de régimen (40)
TOCADIS. (PHONO) 76 dB (IHF, A: 83 dB)
SINTON., DISCO COMPACTO, VIDEO/AUX,
GRAB. 1/DIGITAL, GRAB. 2
(TUNER, CD, VIDEO/AUX,
TAPE 1/DA TAPE, TAPE 2)
160 mV
91 dB (IHF, A: 102 dB)
Respuesta de frecuencia
TOCADISC. (PHONO) curva RIAA estandar
+0,8 dB (30 Hz~15 kHz)
SINTON., DISCO COMPACTO, VIDEO/AUX,
GRAB. 1/DIGITAL, GRAB. 2
(TUNER, CD, VIDEO/AUX,
TAPE 1/DA TAPE, TAPE2) 5 Hz~120 kHz (—3 cB),
+0, —0,2 dB (20 Hz~20 kHz)
Controles de tono
BAJOS (BASS) 50 Hz, +10 dB~-10dB
AGUDOS (TREBLE) 20 kHz, +10 dB~—10dB
Silenciamiento -—20dB
Filtro subsénico 30 Hz, ~6 dB/oct.
Control de sonoridad (volumen a —30 dB) 50 Hz, +9 dB
Voltaje de salida
SAL. GRAB. (REC OUT) 150 mV
Equilibrio de canales, VIDEO/AUX 250 Hz~6300 Hz +1dB
Separacion de canales, VIDEO/AUX 1 kHz 60dB
impedancia y nivel de salida de los auriculares 450 mV/330Q
Impedancia de carga
MAIN o REMOTE 40~1602
MAIN y REMOTE 8N~16Q
m GENERAL
Consumo de energia 295 W
Alimentacion de energia
Para Europa continental CA 50/60 Hz, 220 V
Para otros paises CA 50 H2/60 Hz,
110 V/120 V/220 V/240 V
Dimensiones (An. XAl. x Prof.) 430x97x290 mm
Peso 6,3 kg
Nota:
La distorsién armonica total se mide con el analizador de espec-
tro digital (sistema H.P. 3045).
Estas especificaciones estan sujetas a cualquier cambio sin Previo eviso.

@
CIRCUITS
TO
BE
CHANGED
AND
THE
AREAS
e Power supply circuits
For [EK] area ([EK] is available in United Kingdom)
S13
A! POWER)
AC 1110/1207
220/240V
(50/60Hz)
For [XL] area ((XL] is available in Australia)
AC HO/120/7
220/240V
(50/60Hz)
| Ac 10/1207
220/240V
(50/60H2z}
AUNSWITCHED
fh onl cy
Printed in Japan
af 840707100 ® YK/IM

Stereo Integrated Amplifier
ORDER NO. HAD84072860C8—A
SU-V2X
@ This booklet includes the specifications of Model SU-V2X (Order No. HAD84072860C8) written in German, French
and Spanish.
®@ File this booklet together with the service manual of Model SU-V2X.
@ Dieses Biichlein umfaRt die technischen Daten von Modell
Deutsch, Franzdésisch und Spanisch.
SU-V2X_ (Bestell-Nr. HAD84072860C8) in den Sprachen
@ Bewahren Sie dieses Buchlein zusammen mit dem Service-Handbuch von Modell SU-V2X auf.
© Cette brochure comprend les spécifications du Modéle SU-V2X (N° d’Ordre: HAD84072860C8) écrites en frangais,
en allemand et en espagnol.
@ Classer cette brochure en méme temps qu‘avec le manuel de service du Modéle SU-V2X.
@
Este
librito
incluye
las
especificaciones
de
Modelo
SU-V2X
(Pedido
N°,
HAD84072860C8)
escritas
en
aleman,
francés
y espanol.
® Guardar este librito juntamente con el manual de servicio de Modelo SU-V2X.
DEUTSCH
Mi TECHNISCHE DATEN
(DIN 45 500)
@ VERSTARKERTEIL
Dauerton-Ausgangsleistung bei 1 kHz
beide Kandle ausgesteuert 2x50 W (40)
2x50 W (8Q)
Dauerton-Ausgangsleistung bei 20 Hz~20 kHz
beide Kandale ausgesteuert 2x45 W (4Q)
2x45 W (8Q)
Gesamtklirrfaktor
Nennleistung bei 20 Hz~ 20 kHz 0,03% (4)
0,005% (8Q)
Nennleistung bei 1 kHz 0,007% (4Q)
0,003% (89)
halbe Nennleistung bei 20 Hz~ 20 kHz 0,003% (8)
halbe Nennleistung bei 1 kHz 0,001 % (8Q)
Intermodulationsfaktor
Nennleistung bei 250 Hz: 8 kHz=4:1, 8 Q 0,03%
Nennleistung bei 60 Hz: 7 kHz=4:1, nach SMPTE, 80
0,005%
Leistungsbandbreite
beide Kanale ausgesteuert bei —3 dB
5 Hz~40 kHz (4Q, 0,03%)
5 Hz~50 kHz (8, 0,02%)
Restbrumm und Gerausch 0,9 mV
Dampfungstaktor
30
(49),
60
(8Q)
Eingangsempfindlichkeit und -impedanz
Phono 2,5 mV/47 kQ
TUNER, CD, VIDEO/AUX,
TAPE 1/DA TAPE, TAPE 2 150 mV/22 kQ
Maximale T A-Eingangsspannung (1 kHz, eff.) 160 mV
Gerauschspannungsabstand
Nennleistung (40)
Phono 76 dB (nach IHF, A: 83 dB)
TUNER, CD, VIDEO/AUX,
TAPE 1/DA TAPE, TAPE 2 91 dB (nach IHF, A: 102 dB)
Frequenzgang
Phono RIAA-Stand ardkurve
+0.8 dB (30 Hz~15 kHz)
TUNER, CD, VIDEO/AUX,
TAPE 1/DA TAPE, TAPE 2 5 Hz~120 kHz (—3 dB)
+0, —0,2 dB (20 Hz ~20 kHz)
Klangregler
BaBregler
(BASS)
50
Hz,
+10
dB
~-10dB
Héhenregler
(TREBLE)
20
kHz,
+10dB~—10dB
Tondampfung —20dB
Tiefenfilter 30 Hz, ~ 6 dB/Okt.
Lautstarkekorrektur (Loudness)
(bei —30 dB Ausgangsleistung) 50Hiz, +9 dB
Ausgangsspannung
Aufnahmeausgang (REC OUT) 150 mV
Kanalabweichung (VIDEO/AUX, 250 Hz~6 300 Hz) +1dB
Ubersprechdampfung (VIDEO/AUX, 1 kHz) 60 dB
Kopfhérerpegel und -impedanz 456 mV/3300
Lautsprecherimpedanz
MAIN oder REMOTE 40~160
MAIN und REMOTE 80~160
@ ALLGEMEINE DATEN
Leistungsaufnahme 295W
Netzspannung
Fir Kontinentaleuropa Wechselstrom 50 Hz/60Fiz, 220 V
Fur andere Lander Wechselstrom 50t-42/60 Hz,
110 V/120 V/21O V/240 V
Abmessungen (BXHxT) 430 x 9)>« 290 mm
Gewicht 6,3 kg
Bemerkung:
Der Gesamtklirrfaktor wurde mit einem digitalen Rausd~spektro-
meter (Anlage H.P. 3045) gemessen.
Spezifikationen kénnen infolge von Verbesserungen g me
Ankiindigung geandert werden.
x
iS)
7)
| od
=)
Ww
a

FRANCAIS
FRANCAIS
Mi CARACTERISTIQUES
(DIN 45 500)
m@ SECTION AMPLIFICATEUR
Puissance de sortie continue a 1 kHz
les deux canaux en circuit 2x50 W (4Q)
2x50 W (8Q)
Puissance de sortie continue de 20 Hz~20 kHz
les deux canaux en circuit 2x45 W (40)
2x45 W (8Q)
Distorsion harmonique totale
a puissance nominale (20 Hz~20 kHz) 0,03% (4Q)
0,005% (8Q)
0,007% (4Q)
0,003% (8Q)
0,003% (8)
0,001% (8Q)
a puissance nominale (1 kHz)
a demi-puissance (20 Hz~20 kHz)
a demi-puissance (1 kHz)
Distorsion d’intermodulation
a puissance nominale a 250 Hz: 8 kHz=4:1, 8Q 0,03%
a puissance nominale a 60 Hz: 7 kHz=4:1, SMPTE, 80
0,005%
Réponse de fréquences
les deux canaux en circuit, —3 dB
5 Hz~40 kHz (4Q, 0,03%)
5 Hz~50 kHz (8, 0,02%)
0,9 mV
30 (49), 60 (8)
Bruit et ronflement résiduels
Coefficient d’amortissement
Sensibilité et impédance d’entrée
PHONO 2,5 mV/47 kQ
SYNTONISATEUR, DISQUE COMPACT, VIDEO/AUX,
BANDE 1/DIGITALE, BANDE 2 (TUNER, CD,
VIDEO/AUX, TAPE 1/DA TAPE, TAPE 2)
PHONO (tension d’entrée maximum, 1 kHz RMS)
Signal/Bruit
a puissance nominale (4Q)
PHONO 76 dB (IHF, A:83 dB)
SYNTONISATEUR, DISQUE COMPACTO,
VIDEO/AUX, BANDE 1/DIGITALE, BANDE 2
(TUNER, CD, VIDEO/AUX, TAPE 1/DA TAPE, TAPE 2)
91 dB (IHF, A: 102 dB)
150 mV/22 k<Q
160 mV
Réponse de fréquence
PHONO Courbe nominale RIAA
+0,8 dB (30 Hz~ 15 kHz)
SYNTONISATEUR, DISQUE COMPACTO, VIDEO/AUX,
BANDE 1/DIGITALE, BANDE 2 (TUNER, CD, VIDEO/AUX,
TAPE 1/DA TAPE, TAPE 2)
5 Hz~120 kHz (—3 dB)
+0, —0,2 dB (20 Hz~20 kHz)
Reéglage de la tonalité
BASSES (BASS)
AIGUS (TREBLE)
50 Hz, +10 dB~-—10dB
20 kHz, +10 dB~-10dB
Réglage silencieux —20 dB
Filtre subsonique 30 Hz, —6 dB/oct.
Compensateur physiologique (volume a —30 dB)
50 Hz, +9 dB
Tension de sortie
SORTIE ENREGISTREMENT (REC OUT) 150 mV
Equilibrage des canaux, VIDEO/AUX 250 Hz~6300 Hz
+1dB
Séparation des canaux, VIDEO/AUX 1 kHz 60 dB
Niveau de sortie des casques et impédance 450 mV/3300
impédance de charge
PRINCIPALE ou AUXILIAIRE (MAIN or REMOTE) 40~160
PRINCIPALE et AUXILIAIRE (MAIN and REMOTE) 80~160
@ DIVERS
Consommation 295 W
Alimentation
Pour |l’Europe CA 50 H2/60 Hz, 220 V
Autres CA 50 Hz/60 Hz, 110 V/120 V/220 V/240 V
Dimensions (LXHxPr) 430x97x290 mm
Poids 6,3 kg
Remarques:
1. On mesure la distorsion harmonique totale au moyen d’un
analyseur de spectre digital (Systeme H.P. 3045).
2. La Société NATIONAL-PANASONIC-FRANCE, importateur
du matériel MATSUSHITA-ELECTRIC déclare que cet appa-
reil est conforme aux prescriptions de la directive 76/889
/C.E.E. (arrété 14 Janvier 1980).
Sujet 4 changement sans prearis.

(Switched) AC outlets
layback
Tape IDA tape 'P ayback)
(Unswitched) ({XA] area only)
(Rec
out)
Main
speaker
{R)
Ground
(R) (L) (expect for [XL] area)
Voltage selector
(110V ~—»1 20V-——»220V-~——»240V)
(For [EK}, [XL], [XA] areas only)
Speaker impedance selector
(Rec out) ( gg Main or remote 8~162. _ Main or remote 4 ~62. )
Tape 2 Main and remote 16022 , ~— Main and remote 8].
(Playback)
Tuner input
CD input
Remote speaker
Video/aux input
e Speaker impedance selector
Set to the position corresponding to the impedance of the speaker systems being Note that, if 2 pairs of speaker systems are used at the same
used. time, determine the composite impedance as described below.
If this setting is not correctly made, the result may be a deterioration of
performance.
* If either the main or the remote speaker systems are used: Bee “Ee
4~60,(8—~=): ~ a eeobaan Fat cneaks systems
. =
re aa of a=68. ns connected to “MAIN” terminals
Re=impedance of speaker systems
For
speaker
impedance
of
8~160.
connected
to
‘‘REMOTE”
terminals
* If both main and remote speaker systems are used:
80. (a~-):
For speaker impedance of 80 or more and less than 162.
160. (.~8):
Note:
For speaker impedance of 160.
Be sure to make this setting before switching the power ‘‘on”.
®@ The power supply for this unit varies depending upon the areas. Also, the parts used for power supply are different.
So, refer to the circuit diagram (Separate service manual: Order No. HAD84072860C8—A) and the replacement parts list.
* [XA], [EK] and [XL] areas are provided with voltage selector.
* 220V (50/60Hz) for Continental Europe. (Except for United Kingdom)
* 110V/120V/220V/240V (50/60Hz) for [XA], [EK] and [XL] areas.
* Phono input capacitance is about 150pF.

Mi DISASSEMBLY INSTRUCTIONS
fee How to remove the cabinet
1
1. Remove the 4 screws (@~ @)
How to remove the front panel
1, Remove the 4 screws. ( @~ @)
2. Remove the volume knob.
3. Remove the 1 nut. (@)
4, Pull out the 4 connectors.
(J7 ~ J9, J11)
Procedure
1 3
—
Rear panel

ae
How
to
remove
the
input
selector
P.C.B.
Procedure | 1 Remove the 3 screws. (@~@) 3. Remove the input selector P.C.B.
1
+3
+4
~
2.
Push
the
11
tabs.
(
(4)
®
)
Front
panel
Front panel
Input selector P.C.B.
How to remove the balance/tone
control P.C.B.
Procedure
1.
Remove
the
3
knobs.
5.
Remove
the
balance/tone
control
P.C.B.
1
+3
+5]
2,
Remove
the
3
nuts.
(Q@~®@)
3. Remove the 3 covers.
4. Remove the 1 screw. ( @)
Balance/tone
control P.C.B.
.
*)
Balance/tone
>
nobs
Cover
control
P.C.B.
,
Front chassis
oY
No.
|
How
to
remove
the
power
IC
:
argu:
1,
Unsolder
the
power
IC.
za
2.
Remove
the
2
screws
(@,
@)
Rear panel
Power IC
When mounting the power amplifier IC,
apply silicon compound (SZZOL15) to
the rear of the power amplifier IC.
Screwdriver

pee No. How to remove the sub panel
Procedure
1. Push the 4 tabs of the sub panel.
1 +3 +4 +7
2. Remove the sub panel in the direction of the arrow @® ;
Front panel
Screwdriver
2802631, 2801123
[MN4069UB
_|
14pin|
‘
2SA992,
2SC3112
M53249P |
YP
3 / . Ga Drain
‘s . Gate
Source
3. Source
: ~™=16
MA165, MA167
Front panel
SVINJM20430D
AN6553F