Technics SU-7700 Service Manual

CARACTERISTIQUES TECHNIQUES (!HF) Sujet a changement sans préaris.
PARTIE AMPLIFICATEUR
1kHz, puissance continue: total 2 canaux 7OW + 7OW (41)
53W + 53W (81)
20Hz ~ 20kKHz, puissance continue: total 2 canaux
6OW + BOW (41)
.
50W
+
50W
(82)
Largeur de bande de puissance: total 2 canaux 8)
8Hz ~55 kHz, —3dB
Distorsion harmonique totale:
a la puissance nominate (2OHz ~ 20kHz) 0.08%
a demi-puissance (20HzZ ~ 20kHz) 0.035%
a demi-puissance (1kHz) 0.01%
Distorsion par intermodulation:
0.08% (60HzZ : 7 kHz =4: 1,SMPTE)
O.6mV
25 (49), 50 (89)
Tension résiduelle de bruit:
Facteur damortissement:
Sensibilité et impédance d’entrée:
PHONO
TUNER, AUX
Magnétophone
Magnétophone 2. LECTURE
Magnétophone 1. REC/PLAY
Tension max. d’entree PHONO (1kHz, eff.):
2.5mV/47kQ
150mV/47kQ
180mV/47kQ
150mV/47kQ
180mV/47kQ
150mV
1. LECTURE
m LOCATION OF CONTROLS
LOUDNESS
RIGHT
TRE
LErh
PHONES JACK—
POWER——
7
a4
spcaers[
Mal
a
Ts
:
ee
REMOTE
|
METER RANGE SELECTOR— J
HIGH
FILTER
TAPE
AUX
INPUT
TAPE
1
_
Bee
VOLTAGE
SELECTOR
SWITCH
TUNER
INPUT
see
PHONO
INPUT
MAIN SPEAKER
---REMOTE SPEAKER
TAPE DECK 1
TAPE DECK 2
BLE
BASS | BALANCE
i
(SWITCHED)
(UNSWITCHED)
PHONO
TUNER, AUX
PHONO
TUNER, AUX
Rapport S/B (IHF, A):
78dB
97dB
norme RIAA +0.2dB
5Hz ~ 80kHz +0dB, —3SdB
20Hz ~ 20kHz, +0. 5aB
Grave (BASS) 50Hz4+12dB a—-12qdB
Aigu (TREBLE) 20kHz,+12dB a —-12qB
Filtrage intra acousdique compensateur: 30Hz, —12dB/oct.
Filtre Aigu (HIGH): 8kHz, —6dB/oct.
Correction physiologique (Volume a —30dB) 100Hz,+8dB
Tension de sortie: Magnetophone 1,2, Enregistrement
150mV/1.2kQ
REC/PLAY 30mV/82kQ
4a16Q
8a16Q
Courbe de réponse:
Commandes de tonalite:
Magnétophone 1,
Impédance de charge: PRINCIPAL ou ELOIGNE
PRINCIPAL + ELOIGNE
GENERALITES
Consommation:
Alimentation (50Hz/60Hz):
Dimensions (L x H x P):
Poids:
450W
110V/120V/220V/240V
410 x 139 x 334mm
9.7kg
VOLUME
EQUALIZER
SUBSONIC
FILTER
AUX
—TUNER-INPUT SELECTOR
PHONO
JAC OUTLETS
@ This photo shows only the products for [XA].
@® The products for other destinations except [XA]
are equipped with AC outlet.
e For further remark, the products for [XAL]
are not provided with voltage selector
and AC outlet.
NOTE:
POWER
gare:
The
unit
is
provided
with
the
speaker
TRANSFORMER
circuit
protection
fuses
at
the
right
and
left
channels
respectively.
POWER
FUSES
The
fuse
is
to
prevent
the
power
tran-
sistor
from
destruction,
should
the
MUTING/
speaker
terminals
be
short-circuited.
PROTECTION
RELAY
EQUALIZER
Accordingly, if the unit fails to function
upon completion of the speaker con-
nections, check the speaker protection
fuses first of all for possible blowing.
CIRCUIT
[2] SU-7700
10,000uF ( x 2)
PROTECTION: FUSES

Technics SU-7700 Specifications

General

Damping factor	30
Input sensitivity	2.5mV (MM), 150mV (line)
Output	150mV (line)
Speaker load impedance	4Ω to 16Ω
Power output	50 W per channel into 8Ω (stereo)
Signal to noise ratio	95dB (line)
Channel separation	55dB (MM)