Hitachi HA-8700 Service Manual

© HITACHI
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No. 172
SPECIFICATIONS
POWER AMPLIFIER SECTION
Power output 90 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)
(8ohms, 1 kHz,0.01% THD): 100 watts + 100 watts
(4ohms, 1 kHz,0.01% THD):
Power Band Width:
Frequency Response
Direct Coupling
Condenser Coupling:
Total Harmonic Distortion
(20 Hz-20 kHz,
8 ohms from MAIN IN)
at 90 watts output
at 1/2 rated output:
Intermodulation distortion
(60 Hz: 7 kHz,4:1)
at 90 watts output:
at 1/2 rated output:
Input Sensitivity/!mpedance:
input Terminals:
Output Terminals:
Signai-to-Noise Ratio
IHF, Short-Circuited,
A network, Rated Power:
Damping Factor
8 ohms, 1/2 rated
output:
Channel Separation
1 kHz, 8 ohms:
Speaker Impedance:
Phones Impedance:
130 watts + 130 watts
5 Hz—100 kHz
{0.02% THD)
DC—100 kHz +0, -1 dB
4 Hz (6 dB/Oct)
0.02%
0.005%
0.008%
0.003%
1 V/47 kohms
Direct Coupling/
Condenser Coupling
(Selected by Rear
Panel Switch)
A or B Speakers
115dB
80 (1 kHz)
60 (20 Hz—20 kHz)
75 dB {4.7 kohms
short}
4ohms — 16 0hms
More than 4 ohms
PREAMPLIFIER SECTION
Input Sensitivity/I mpedance
Phono 1,2: MM
MC
Tuner, AUX:
Tape play 1,2:
Maximum Input levels
(1 kHz, 0.005% THD)
Phono 1,2:
Output Leveil/! mpedance
Pre-out:
Tape REC out 1,2:
Maximum Output Levels
(20 Hz~20 kHz, 0.01% THD}
Pre-out:
Frequency Response
Phono:
Tuner, AUX:
Signal-to-Noise Ratio
(FHF, Short-Circuited,
A Network, Rated Power}
Phono 1,2:
Tuner, AUX:
Tape Play 1,2:
Harmonic Distortion
Phono 1,2:
2.5 mvV/
(100 ohms, 22 kohms,
47 kohms, 100 kohms,
100 pF, 200 pF,
300 pF, 400 pF)
250 wV/100 ohms
150 mV/47 kohms
150 mV/47 kohms
[Tape play 2 (DIN):
150 mV/47 kohms
(Except for
U.S.A. & Canada) }
MM 300 mV
MC 30 mV
1V/600 ohms
150mV/600 ohms
[Tape REC out 2 (DIN):
50 mV/80 kohms
(Except for U.S.A.
& Canada) ]
More than 7V-
(MUTING: OFF)
20 Hz—20 kHz, +0.2 dB
10 Hz—100 kHz, +0,-2dB
MM 90 dB, MC 73 dB
100 dB
100 dB
MM 0.005%
(20 Hz ~ 20 kHz
at REC out Level 10 V)
MC 0.005%
(20 Hz — 20 kHz
at REC out Leve!
10 V)
STEREO AMPLIFIER
May 1979