Onkyo A-8870 User Manual

ONKY-00296
Ref. No. 3404
ONKYO.
SERVICE
MANUAL
integrated Stereo Amplifier
MODEL A-8870
Black and silver models
SAFETY-RELATED
COMPONENT
WARNING!!
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ONKYO
AUDIO COMPONENTS

Onkyo A-8870 Specifications

General

Frequency Response	5Hz-100kHz (+1dB, -3dB)
Power Output	80 W + 80 W (8 ohms, 20Hz-20kHz, THD 0.008%)
Total Harmonic Distortion	0.008%
Damping Factor	60 (8 ohms, 1kHz)
Input Sensitivity	2.5 mV (MM)
Speaker Load Impedance	4 ohms - 16 ohms
Dimensions	435 x 149 x 431 mm
Weight	21.5kg

Summary

SAFETY-RELATED COMPONENT WARNING!!

SPECIFICATIONS

PRECAUTIONS

Replacing the fuses

Guidance on replacing fuses with identical types and ratings to prevent fire risk.

ADJUSTMENT PROCEDURES

Preparations

Instructions for workbench setup, unit configuration, and pre-adjustment checks.

Idling current adjustment

Procedure to adjust voltage for idling current on the NAAF-4209 circuit board.

Check of operation of protection circuitry

Steps to verify the protection relay, DC detection, and servo circuitry functions.

IC BLOCK DIAGRAM

BLOCK DIAGRAM

CHASSIS-EXPLODED VIEW

CHASSIS EXPLODED VIEW PARTS LIST

PRINTED CIRCUIT BOARD PARTS LIST

PRINTED CIRCUIT BOARD VIEW FROM BOTTOM SIDE

SCHEMATIC DIAGRAM

PARTS LIST OF PACKING

FRONT PANEL FACILITIES

SYSTEM CONNECTIONS