Onkyo A-8800

A-8800
SERIAL NO. 3309
ONKYO. SERVICE MANUAL
Integrated Stereo Amplifier
MODEL A-8800
120V AC, 60Hz
220V AC, 50Hz
240V AC, 50Hz
120V/220V AC, 50Hz/60Hz
SAFETY
-RELATED
COMPONENT
WARNING!!
TABLE
OF
CONTENTS
COMPONENTS IDENTIFIED BY MARK /\ ON THE
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE Specifications
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
REPLACE THESE COMPONENTS WITH ONKYO PARTS
WHOSE PARTS NUMBERS APPEAR AS SHOWN IN THIS
Precautions
Adjustment procedures
MANUAL. Front panel facilities
IC block diagram
MAKE LEAKAGE-CURRENT OR RESISTANCE MEA- System connections
SUREMENTS TO DETERMINE THAT EXPOSED PARTS Packing procedures
ARE ACCEPTABLY INSULATED FROM THE SUPPLY
CIRCUIT BEFORE RETURNING THE APPLIANCE TO
THE CUSTOMER.
Chassis exploded view
Exploded view parts list
Printed circuit board parts list
Printed circuit board view
Block diagram
Schematic diagram
KYO
May
COMPONENTS

Onkyo A-8800 Specifications

General

Dimensions	435 x 144 x 391mm
Weight	11.2kg
Damping factor	100
Speaker load impedance	4 - 16 ohms
Input Impedance	47k ohms

Summary

Audio Amplifier Specifications

Safety Precautions and Fuse Replacement

Fuse Replacement Guidelines

Replace fuses with the same type and rating for continued protection.

US Model Insulation Resistance Test

Measure insulation resistance (>10 MΩ at 500V) on US models.

Worldwide Voltage Selector Setting

Ensure voltage selector matches local power supply before use.

Unit Adjustment and Protection Circuit Checks

Adjustment Preparation Steps

Prepare the unit by placing it correctly and setting switches.

Idling Current Adjustment Method

Adjust R531/R532 for 15mV±5mV at test point VCT-IID.

Protection Circuitry Verification

Test relay and DC detection circuitry operation upon power on/off.

DAC Block Specific Adjustments

DAC Distortion Adjustment Steps

Adjust resistors R815, R813, R811 to minimize distortion elements.

Front Panel Controls and Indicators

Audio System Connection Guide

Product Packing Instructions

Chassis Components Exploded View

Circuit Board Parts Inventory

Input Switch & Equalizer Circuit PC Board Parts

Parts list for the Input Switch & Equalizer circuit board.

Mode Switch Circuit PC Board Parts

Parts list for the Mode Switch circuit board.

Tone Control Circuit PC Board Parts

Parts list for the Tone Control circuit board.