Onkyo A-7 Service Manual

A-/
ONKYO. SERVICE MANUAL
INTEGRATED STEREO AMPLIFIER
Model A-/
SPECIFICATIONS
Model A-7 Integrated Stereo Amplifier
Power Supply Rating
Controls
Outputs
Inputs
Dimensions
Weight
AC 120 Volts 60 Hz (USA Model)
AC 110V/120V/220V/240V
50Hz/60Hz (Universal Model)
POWER
SPEAKERS (OFF, A, B, A+B)
SELECTOR (PHONO 1, PHONO 2,
TUNER, AUX)
TAPE MONITOR (TAPE 1, SOURCE,
TAPE 2)
Total Harnomic
Distortion (AUX)
IM Distortion (AUX)
(70Hz : 7kHz= 4:1)
Frequency Response
Tilt
Signal to Noise Ratio
Damping Factor
Rated input
TAPE DUBBING (TAPE 2-1, OFF, TAPE Input Impedance
1-2)
VOLUME, BALANCE, BASS, TREBLE,
TURN OVER SWITCH
BASS (125Hz, DEFEAT, 400Hz)
TREBLE (2kHz, DEFEAT, 8kHz)
MUTING, LOUDNESS,
MODE, HIGH FILTER,
SUB-SONIC FILTER
SPEAKER A & B, PHONES
TAPE REC 1 & 2,
PRE OUT
PHONO 1 & 2
TUNER
AUX
TAPE PLAY 1 & 2
MAIN IN
17t2''(W) x 64%4''(H) x 15"°(D)
444 x 159 x 380 mm
29.7 Ibs. 13.5 kg.
Power Amplifier Section
Power Output
(through AUX inputs)
70 watts per channel, min. RMS, at 4
Ohms both channels driven, from 20 Hz to
20 kHz, with no more than 0.1% total
harmonic distortion.
65 watts per channel, min. RMS, at 8
ohms both channels driven, from 20 Hz to
20 kHz, with no more than 0.1% total
harmonic distortion.
75 watts per channel, min. RMS, at 4
ohms both channels driven, 1 kHz, 0.1%
total harmonic distortion.
68 watts per channel, min. RMS, at 8
ohms both channels driven, | kHz, 0.1%
total harmonic distortion.
Load Impedance
Preamplifier Section
Input Sensitivity &
Impedance
Total Harmonic
Distortion
IM Distortion
(70Hz : 7kKHz = 4:1)
Frequency Response
Phono Overload
Signal to Noise Ratio
Output Voltage
Output Impedance
Tone Control
Turnover Frequency
Filters
Muting
Loundness
(—40 dB)
BASS
TREBLE
SUBSONIC
HIGH
0.1% at rated power
0.08% at 1 watt output
0.1% at rated power
0.08% at 1 watt output
2-80,000 Hz (+1 dB)
better than 5% at 50 Hz
110 dB (IHF A NETWORK)
50 at 8 ohms
1.5 volts
100 k-ohms
4—16 ohms
PHONO 1 & 2: 2.5mV, 50 k-ohms
TUNER: 150mV, 50 k-ohms
AUX: 150mV, 50 k-ohms
TAPE PLAY 1 & 2: 150mV, 50 k-ohms
0.05% at rated output
0.08% at rated output
PHONO: +0.2 dB at 30—15,000 Hz
AUX: +0, —1 dB at 10—50,000 Hz
230mV RMS. at 1 kHz, 0.1% THD.
PHONO: 80 dB (THF A NETWORK)
AUX: 90 dB (IHF A NETWORK)
1.5 volts, max 15 volts
2.7 k-ohms
+10 dB at 100 Hz (turnover at 400 Hz)
+10 dB at 10 kHz (turnover at 2 kHz)
BASS: 400 Hz, 125 Hz
TREBLE: 2 kHz, 8 kHz
10 Hz (6 dB/oct.)
5 kHz (6 dB/oct.)
—20dB .
+5 dB at'100 Hz
+5 dB at 10 kHz
Specifications are subject to change without notice.
ONKYO.
AUDIO COMPONENTS