Onkyo A-10 Service Manual

SPECIFICATIONS
Power Amplifier Stage
Power Output
Total Harmonic
Distortion (AUX)
IM Distortion (AUX)
(70Hz:7kHz = 4:1)
Frequency Response
Square Wave Response
(Tilt)
Signal to Noise Ratio
Damping Factor
Rated Input
Input Impedance
Load Impedance
Preamplifier Stage
Input Sensitivity and
Impedance
85 watts per channel, min.
RMS both channels driven at
8 ohms from 20Hz to 20kHz,
with no more than 0.08% total
harmonic distortion.
130 watts perchannel, min. RMS, at
4 ohms both channels driven, at
1kHz, 0.08% total harmonic distor-
tion. 90 watts per channel, min.
RMS, at 8 ohm both channels
driven, at 1kHz, 0.08% total
harmonic distortion.
0.08% at rated power output
0.08% at 1 watt output power
0.1% at rated power output
0.08% at 1 watt output power
2 — 80,000 Hz (+1dB)
better than 5% at 50Hz
110 dB (IHF A network)
50 at 8 ohms
1.5 volts
50 kohms
4 to 16 ohms
PHONO MC: 100pV,
20 ohms
2.5mV,
50 kohms
150mV,
50 kohms
150mV,
50 kohms
150m¥V,
50 kohms
PHONO 1 & 2:
TUNER:
AUX:
TAPE PLAY | & 2:
Total Harmonic
Distortion
IM Distortion
(70Hz:7kHz = 4:1)
Frequency Response
Phono Overload
Signal to Noise Ratio
Output Voltage
Output Impedance
Tone Controls BASS
Tone Controls TREBLE
Turnover Frequencies
Filters
Muting
Loudness (—40 dB)
General
Power Supply
Dimensions
Weight
Semiconductors
SERIAL No. 3038
ONKYO.
SERVICE
MANUAL
INTEGRATED STEREO AMPLIFIER
Model A-10
0.05% at rated output
0.08% at rated output
PHONO MM_#0.2 GB at
30 — 15,000Hz
+0, —1dB at
10 — 50,000Hz
230mV RMS at 1kHz, 0.1% THD
PHONO MC: 68 dB
(IHF A network)
78 dB
(IHF A network)
90 dB
(IHF A network)
L5V
150 mV
AUX:
PHONO MM:
AUX:
PRE OUT:
REC OUT:
PREOUT: 2.7 kohms
REC OUT: 2.5 kohms (PHONO)
+10dB at 1O0Hz
+}0dB at 10kHz
BASS: 125Hz, 400Hz
TREBLE: 2kHz, 8kHz
SUBSONIC: 10Hz (12dB/oct.)
HIGH CUT: 6kHz (12dB/oct.)
—20 dB
+5 dB at 100 Hz
+5 dB at 10 kHz
AC 120V, 60Hz or AC 220V, 50Hz
17% "(W)x6%4 ’(H)x15-13/16'(D)
444(W)x159(H)x401(D)mm
39.6 Ibs. 18kg.
65 transistors, 26 diodes
Specifications
and
features
are
subject
to
change
without
notice.
ONKYO.
AUDIO
COMPONENTS

Onkyo A-10 Specifications

General

Brand	Onkyo
Model	A-10
Category	Amplifier
Language	English

Summary

Specifications

Power Amplifier Stage Specifications

Details on power output, distortion, frequency response, S/N ratio, and damping factor.

Preamplifier Stage Specifications

Specs for input sensitivity, impedance, and overload for the preamp section.

General Specifications

Information on power supply, dimensions, weight, and semiconductor count.

Circuit Description

Speaker Protection Circuit

Details operation and conditions for the speaker protection circuit.

Hold Circuit

Explains the function and operation of the hold circuit.

Current Detector

Describes the current detector's role and interaction with protection.

Voltage Detector Circuit

Voltage Detector Operation

Explains the voltage detection circuit and its role in relay operation.

Exploded View and Parts List

Parts List

Enumerates parts by reference, part number, and description.

Component Location

Component Location - U.S.A. Model

Lists components for the USA version of the amplifier.

Component Location - 220V Model

Lists components for the 220V version of the amplifier.

PC Board Parts Lists

NAAF-436 Board Components

Lists transistors, diodes, and capacitors for the NAAF-436 board.

Component Details

Capacitors

Lists various capacitor types and values.

Resistors

Lists various resistor values and wattages.

Switches and Relays

Lists switches and relays used in the unit.

Specific PC Board Parts Lists

MC Head Amp. PC Board (NAAF-435) Parts List

Components for the Head Amplifier board.

Tape Monitor PC Board (NATM-434) Parts List

Components for the Tape Monitor board.

Tone Control PC Board (NATS-374a) Parts List

Components for the Tone Control board.

Power Amplifier PC Board

Power Amplifier PC Board Parts List

Lists transistors, diodes, capacitors, coils, resistors, and variable resistors for the power amp board.

Schematic Diagram

Service Procedures

Idling Current Adjustment

Procedure to adjust idling current using a DC voltmeter.

Current Detector Level Adjustment

Procedure to adjust the current detector level using a tone burst signal.

Center Voltage Check

Procedure to check and adjust center voltage using a DC VTVM.

Packing Procedures

Parts List for Packing

Lists all included parts and accessories for packaging.