Onkyo A 5 Service Manual
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Page 1
SERIAL NO. 3030
ONKYOQ SERVICE MANUAL
INTEGRATED STEREO AMPLIFIER
Model A- 5
INDEX
DESCRIPTION Page
Specifications 2
Service Procedures 2
Component Location 3
Chassis Layout 4
NAAF-383a PC Board View 5
Preamp. and Rectifier P.C.B, - Parts List 5
NAMA-384a PC Board View 7
Main Amp. P.C.B. - Parts List 7
Schematic Diagram 9
Packing Procedures I 1
ONKYO®
AIIIIIII IIIIMPIIIIIIIIS
Page 2
SPECIFICATIONS
Power Amplifier Section
Continuous
Dynamic
Total Harmonic
Distortion
lM Distortion
(70Hz:7kHz=4:l)
Frequency Response
Tilt of Square Wave
Signal to Noise Ratio
Damping Factor
Input Impedance
Rated Input
Load Impedance
60 watts per channel, min. RMSm
4 ohms, both channels driven, lkHz,
0.1% THD.
50 watts per channel, min. RMS, at
8 ohms, both channels, driven, lkHz
0.1% THD.
50 watts per channel, min. RMS,at
4 ohms, both channels driven, from
20112 to 20kHz, 0.1% THDI
45 watts per channel, min. RMS. at
8 ohms, both channels driven, from
20Hz to 20kHz, 0.1% THD.
250 watts total at 4 ohms 1%
THDI (DIN)
160 watts total at 8 ohms 1%
THD. (DIN)
220 watts total at 4 ohms 0.1% THD.
150 watts total at 8 ohms 0.1% THD.
0.1% at rated power
0.08% at 1 watt output
008% at 1 watt output
2A7O,000IIZ (11:13)
better than 5% at SOHZ
110dB(11-1F A NETWORK)
50 at 8 ohms
25 k-ohms
1.5 volts
4-16 ohms
Preamplifier Section
Input Sensitivity &
Impedance
Total Harmonic
Distortion
1M Distortion
(70Hz: 7kHz=4: 1)
Frequency Response
Phone Overload
Signal to Noise Ratio
Tone Controls
BASS
TREBLE
Output Voltage
Output Impedance
Subsonic Filter
Muting
Loundness (740dB)
General
Power Supply
Dimensions
(w x H x D)
Net Weight
PHONO 18L 2: 2.5mV, 50 190th
TUNER: lSOmV, 50 k~ohms
TAPE PLAY 1 & 2: lSOmV,
SO k-ohms
0.08% at rated output
0.08% at rated output
PHONO: :0.3dB at 30-IS,000HZ
TUNER: 15740,000Hz(+0,71dB)
170mV RMS at lkHz, 01% THD
PHONO: 75dB (IHF A NETWORK)
TUNER: 90dB (IHF A NETWORK)
tIOdB at IOOHZ
thdB at IOkHz
1.5 volts
2.2 k-ohrns
10Hz (6dB/oct.)
«ZOdB
+5dB at 1001lz
+5dB at lOkHz
AC 110/120/220/240V, 50/60Hzr
(Universal Model)
AC 120V. 60Hz (U,S.A. Model)
444 x159 x 380mm
(I7/2" x694 x15")
I212kg (269 lbs.)
Specifications and features are subject to change without notice.
SERVICE PROCEDURES
1.
1)
2)
3)
4)
Checking the circuit board of the power amplifier.
Remove two lower screws from the heat sink.
Remove two screws on the back of the heat sink.
Remove two heat-sensor transistors 0613 and 0614 from the heat sink. If they cannot be pulled out, remove two
mounting screws from the transistor sockets.
The check can also be performed by fastening it as shown in Fig. l with screws that have been removed.
Screw
2-
Fig. 1