Hitachi HA-7700 Service Manual

www.mauritron.com
www.mauritron.com
.HITACHI
SERVICE MANUAL
THE QUALITY OF
THIS MANUAL IS
THE BEST THAT
IS AVAILABLE
SPECIFICATIONS
POWER AMPLIFIER SECTION
Power output 65 watts minimum RMS per
channel,
both channels driven into 8 ohms
load from
20-20,000 Hz with no more
than 0.02% total harmonic distortion.
Rated Power Output (both channels driven)
(8 ohms, 1 kHz, 0.01 % THD): 70 watts+ 70 watts
(4ohms. 1 kHz,0.01% THD): 53watts+53watts
Power Band Width: 5 Hz-100 kHz
(0.03% THD)
Frequency Response
Direct Coupling:
Condenser Coupling:
Total Harmonic
Distortion
(20 Hz-20 kHz.
8 ohms
from MAIN IN)
at rated output:
at 1 /2 rated output:
Intermodulation Distortion
(60 Hz : 7 kHz, 4 : 1)
at rated output:
at 1 /2 rated output:
Input Sensinvity/lmpedance:
Input Terminals:
Output Terminals:
Signal-to-Noise Ratio
IHF. Short-Circuited,
DC-lOOkHz+0,-1 dB
4
Hz (6 dB/Oct)
0.02%
0.005%
0.008%
0.003%
1 V (47 kohmsl
Direct Coupling/
Condenser Coupling
(Selected by
Rear Panel
Switch)
A
or B Speakers
A network, Rated Power: 115 dB
Damprng Factor
1 kHz. 8 ohms, 1
/2 rated output: 60
Channel Separation
1 kHz. 8 ohms:
Speaker Impedance:
Phones Impedance:
75 dB (4.7 kohms short)
4 ohms - 16 ohms
More than 4 ohms
English
Deutsch
Francrais
PREAMPLIFIER SECTION
Input Sensitivity/Impedance
Phono 1, 2:
Tuner,
AUX:
Tape Play 1, 2:
Phono overload
(1 kHz.0.01% THD)
Phono 1, 2:
Output Level/Impedance
Pre-0ut:
Tape REC
out 1, 2:
Maximum
Output Levels
(0.01% THD)
Pre-0ut:
Frequency
Response
Phono:
Tuner.
AUX:
Signal-to·Noise Ratio
(I HF, Short-Circuited
A
Network. Rated Power)
Phono
1. 2:
Tuner, AUX.
Tape Play 1. 2:
No. 160
For Service Manuals Contact
MAURITRON TECHNICAL SERVICES
8 Cherry Tree Rd, Chinnor
Oxon OX94QY
Tel:- 01844-351694 Fax:-01844-352554
Email:- enquiries@mauritron.co.m
MM 2.5 mV
(100 ohms, 22 kohms.
47 kohms, 100 kohms)
MC 250 µ.V
(100 ohms)
150
mV (47 kohms)
150
mV (47 kohms)
[Tape play 2
(DIN):
150 mV (47 kohmsl
(Except
for U.S.A. &
Canada)]
MM 300
mV
MC 30 mV
1 V (600 ohms)
150 mV (600 ohms)
[Tape
REC out 2 (DIN):
50 mV (80 kohms)
(Except
for U.S.A. &
Canada)]
More than 7 V-
(
MUTE: OFF)
20
Hz-20 kHz.
±0.2 dB
10
Hz-100 kHz, +O
-2.5 dB
MM 86 dB. MC 68 dB
lOOdB
100 dB
STEREO AMPLIFIER
March 1979

Hitachi HA-7700 Specifications

General

Type	Stereo Integrated Amplifier
Power Output	75 watts per channel into 8Ω (stereo)
Damping Factor	60
Output	150mV (line)
Speaker Load Impedance	4Ω to 16Ω
Input Impedance	50kΩ
Input Sensitivity	150mV (line)