Hitachi HMA-G2 Serviceanleitung

@HITACHI
SAFETY PRECAUTION
The following precautions should be observed when servicing.
1. Since many parts in the unit have special séfety related characteristics,always use genuineHitachi's replacement
parts. Especially critical parts in the power circuit block should not be replaced with other makers.
Critical parts are marked with
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
Circuit system:
Power output:
(both channels
Total harmonic
distortion:
Intermodulation
distortion:
(60 Hz: 7 kHz = 4: 1)
Frequency response:
Input sensitivity/
impedance:
SPECIFICATIONS
STEREO
March
in the schematic diagram and circuit board diagram.
First-stage differential, Darling-
ton configuration, Pure comple-
mentary circuit
driven) 60W + 60W (I kHz, 8 ohms,
0.02%)
0.0025%
(I kHz, 30W output, 8 ohms)
0.008% (30W output, 8 ohms)
10 Hzto 100 kHzt? dB
I V/50 kohms
AND PARTS
POWER
1982
TY
CONTENTS
SPECIFICATIONS
FEATURES
DISASSEMBLY
CHECKING
PROTECTION
PRINTED
CIRCUIT
BLOCK DIARGAM
REPLACEMENT
FRONT AND
CAUTION
Make leakage-current
determine that exposed parts are acceptably
from the supply circuit before returning the appliance
to the customer.
Signal-to-noise
(IHF A network,
input shorted)
Power requirements:
Power consumption
Dimensions:
Weight:
Accessory:
ARE SUBJECT TO CHANGE
AMPLIFIER
TOYOKAWA
No. 314
HMA-G2
AND REPLACEMENT...........
THE OPERATION OF THE
CIRCUIT ....................
WIRING BOAD .
DIAGRAM .
.......................................
PARTS LIST ...
REAR PANEL......
FOR U.S.A.
or resistance measurements
ratio:
119 dB
AC 120V 60 Hz
220V -240V
100- 1
50/60 Hz
240W (for USA. & Canada)
: 380W (except U.SA. & Canada)
320 (W)x 137 (H) x 271 (D) mm
(incl. knobs and other projec-
tions)
5.8 kg
US Pin cord
FOR IMPROVEMENT.
WORKS
EGF
.. 3
3
4
7
8
9
.10
12
to
insulated
240V
1