Hitachi HA-M44 Service Manual

@HITACHI
0 SERVICE
SAFETY PRECAUTION
The following precautions should be observed when servicing.
I. Sincemanypartsin theunithavespecial s afetyrelatedcharacteristics, always usegenuine Hitachi'sreplacement parts. E specially
critical parts in the power circuit block should not be replaced with other makers.
Critical parts are marked with
2. Beforereturning a repaired unitto the customer, the service technician mustthoroughly t esttheunitto ascertain thatit is completely
safe to operate without danger of electrical shock.
SPECIFICATIONS
POWER output
(Both channels driven)
RMS Rated Output
(Both channels driven)
Harmonic distortion (8 ohms)
(at rated output)
Intermodulation distortion
(at 1/2 rated output)
Power bandwidth
Frequency characteristics
TUNER, AUX, TAPE
PHONO
Input sensitivity/lmpedance
PHONO
TUNER, AUX
TAPE PLAY
SPECIFICATIONS
July 1982
MANUAL
in the schematic diagram and circuit board diagram
60 watts* per channel,
min. RMS, at 8 ohms from
20 Hz to 20 kHz, with no
more than 0.0296
harmonic distortion.
60 Watts
power
(1 kHz, 8 ohmsT.H.D. 0.02%, SINUS)
60 Watts
(20 Hz - 20 kHz, 8 ohms T.H.D. 0.02%)
0.02%
0.02%
10 Hz- 40 kHz
(8 ohms, T.H.D. 0.0596 1/2 Rated)
20 Hz -40 kHz ( -3 odB)
30Hz - 15kHz,RIA'A±O.5dB
(MM) 2.5 mV/47 k-ohms
(MC) 0.25 mV/100 ohms
160 mV/45 k-ohms
160 mV/45 k-ohms
AND PARTS
STEREO AMPLIFIER
TY
CONTENTS
SPECIFICATIONS
CARACTÉRISTIQUES
DISASSEMBLY
UND AUSTAUSCH
BLOCK DIAGRAM
PRINTED
PLAN DE
CIRCUIT DIAGRAM
PLAN DE CIRCUIT
REPLACEMENT
TABLEAU
FRONT AND REAR
BEDIENUNGSTAFEL.
Output level
TAPE REC
Phono overload level (at I kHz) (MM) 120mV (MC) 12mV
Signal-to-noise ratio
total
(IHF, A network)
PHONO
TUNER,
Damping factor
Bass control
Treble control
Subsonic
Loudness
Power supply
Power consumption
Dimensions
Weight
* Measured pursuant to the Federal Trade Commission'sTrade
Regulation Rule on Power Output Claims for Amplifiers.
ARE SUBJECT TO CHANGE
TOYOKAWA
No.326
HA-M44
• INHALT .SOMMAIRE
• TECHNISCHE OATEN
TECHNIQUES
AND REPLACEMENT • ZERLEGUNG
• DEMONTAGE ET REMONTAGE
• BLOCK SCHEMA • SCHEMA
WIRING BOARD • PRINTPLATTEN
BASE
• SCHALTPLAN •
PARTS LIST • ERSATZTEILLISTE
DES PIÉCE
PANEL • VORDERE UND HINTERE
PANNEAUX AVANT
150 mV
OUT
(MM) 84dB (MC) 66 dB
95 dB
AUX, TAPE
30 (l kHz, 8 ohms)
dB (100 Hz)
dB (10 kHz)
20 Hz
filter
+6 dB (100 Hz)
control
+4 dB (10 kHz)
AC 120V 60 Hz
ru220 V 50/60 Hz, ru240V 50/60 Hz
M20/220/240
120 W (at 1/10 rated output)
190 W (at 1/3 rated output)
350 W (at rated output)
435 (W) X 83 (H) X 290 (D) mm
5.7 kg
FOR IMPROVEMENT.
WORKS
EGF
•
••1,2
•3
•
6
•
• •II
ET ARRIERE
V 50/60 Hz