Hitachi MX-W50 - SAFETY PRECAUTIONS; SPECIFICATIONS; GENERAL; AMPLIFIER SECTION

MX-W50
SAFETY PRECAUTIONS
The following precautions should be observed when servicing.
1. Since many parts in the unit have special safety-related characteristics, always use genuine Hitachi
replacement parts. Especially critical parts in the power circuit block should not be replaced with other makers.
Critical parts are marked with A\ in the circuit diagram and printed wiring board.
2. Before returning a repaired unit to the customer, the service technician must thoroughly test the unit to
ascertain that it is completely safe to operate without danger of electrical shock.
SPECIFICATIONS
@ GENERAL
Power supply
Power consumption:
Dimensions:
Weight:
@ AMPLIFIER SECTION
Power output:
Total harmonic distortion:
Input sensitivity/Impedance:
Load impedance:
S/N ratio (IHF A network):
@
TUNER
SECTION
FM
Frequency range:
Sensitivity:
S/N ratio:
de base.
PRECAUTIONS DE SECURITE
Les
précautions
suivantes
doivent
étre
observées
chaque
fois
qu’une
réparation
doit étre
faite.
1.
Etant
donné
que
de
nombreux
composants
de
l'appareil
possédent
des
caractéristiques
relatives
a
la
sécurité,
utiliser uniquement
des
piéces
de
rechange
d’origine
Hitachi
pour
effectuer
un remplacement.
Ceci
se
rapporte
notamment
aux
piéces
critiques
du
bloc
d’alimentation
qui
ne
doivent
en
aucun
cas
étre
remplacées
par
celles
d’
autres
fabricants.
Les
piéces
critiques
sont
accompagnés
du
symbole
A\
dans
le
plan de
circuit
et
sur
le
plan
AC: 120V 60 Hz [for US, CS]
AC: 220V, 50 Hz [for ES, VS, KS, ZS]
AC: 240V, 50 Hz [for BK, SA]
AC: 110—120V/200—220V/230—240V,
50/60 Hz [for EW}
250W
621 (W) x 133 (H) x 368 (D) mm
8.5 kg
50 Wich + 50 W/ch (8 ohms, 1 kHz,
T.H.D. 0.7%)
0.5% {at 1/2 power output)
PHONO: 3 mV/47 khoms
AUX: 90mV/22 kohms
Speaker: 8—16 ohms
Headphones: more than 8 ohms
PHONO: 73 dB
AUX: 87 dB
87.9—107.9 MHz (200 kHz steps)
{for US, CS]
87.5—108.0 MHz (50 kHz steps)
[except US, CS]
1.5 nV (S/N 26 dB)
MONO: 72 GB (IHF)
63 dB (IEC, unweighted, Q-peak)
60 dB (IEC, weighted, Q-peak)
STEREO: 68 dB (IHF)
58 dB (IEC, unweighted, Q-peak)
55 dB (IEC, weighted, Q-peak)
2. Avant de retourner l’appareil répare au client le technicien doit procéder a un essai complet pour s’assurer qu’il
ne présente aucun danger de chocs électriques.
FM selectivity: 60 dB (+ 300 kHz)
Stereo separation: 40 dB (1 kHz)
MW (AM)
530—1,710 kHz (10 kHz steps)
{for US, CS]
522—1,611 kHz (9 kHz steps)
530—1,710 kHz (10 kHz steps)
[for EW]
522—1,611 kHz (9 kHz steps)
[except US, CS, EW]
40 V (S/N 26 dB)
50 dB
Frequency range:
Sensitivity:
S/N ratio:
LW [for BK, ES, VS]
Frequency range: 153—281 kHz (1 kHz steps)
Sensitivity: 400 »V (S/N 26 dB)
@ TAPE DECK SECTION
Track system: 4 tracks 2 channels stereo
Recording system: AC bias
Tape: Normal, Chrome, Metal
Normal: 40 — 14,000 Hz
CrO2: 40 — 15,000 Hz
Metal: 40 — 16,000 Hz
Frequency response:
@CD PLAYER SECTION
Playing time: Approx. 60 minutes/one side
Diameter: 120mm
Sampling frequency: 44.1 kHz
Quantization number: 16 bit linear/channel
Frequency response: 20 — 20,000 Hz
Specifications are subject to change without notice for performance improve-
ment.