Onkyo TX-8522

TX-8522
SERVICE MANUAL
SERVICE MANUAL
STEREO RECEIVER
Black and Silver models
MODEL TX-8522
Ref. No. 3944
062006
120V AC, 60Hz
230-240V AC, 50Hz
BMDD,BMDC
BMPP,SMPP,BMPA
RC-664S
RC-666S
North American model
Other models
SAFETY-RELATED COMPONENT
WARNING!!
COMPONENTS IDENTIFIED BY MARK ON THE
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
REPLACE THESE COMPONENTS WITH ONKYO
PARTS WHOSE PART NUMBERS APPEAR AS SHOWN
IN THIS MANUAL.
MAKE LEAKAGE-CURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE
SUPPLY CIRCUIT BEFORE RETURNING THE
APPLIANCE TO THE CUSTOMER.

Onkyo TX-8522 Specifications

General

Brand	Onkyo
Model	TX-8522
Category	Stereo Receiver
Language	English

Summary

ONKYO TX-8522 Service Manual

Safety Related Component Warning

Critical components for fire/shock risk. Replace with specified parts.

Service Procedures

Fuse Replacement

Procedure for replacing fuses with correct type and rating.

Safety Check Procedures

Essential safety checks, including leakage current measurement.

Product Specifications

Amplifier Section Specifications

Detailed technical specifications for the amplifier performance.

System Block Diagram

Audio and Video Signal Flow

Diagram illustrating the path of audio and video signals through the unit.

Audio Section Schematics

North American Audio Circuit

Power Amplifier Section Schematics

Schematics detailing the power amplifier stage circuits.

Microprocessor Section Schematics

Microprocessor Control Logic

Schematic for the main microprocessor and its peripheral connections.

Tuner and XMSirius Control

Power Supply Schematic

Power Transformer and Primary Circuits

Schematic of the power transformer, fuses, and primary voltage regulation.

Audio Section Schematics (EuropeAustralia)

EuropeanAustralian Audio Circuit

Microprocessor Connectivity

CPU Connection Diagram

Diagram showing connections between the microprocessor and other major circuits.

Microprocessor Pin Descriptions

CPU Terminal Functions (1-60)

Detailed description of microprocessor terminal functions from 1 to 60.

CPU Terminal Functions (61-100)

Detailed description of microprocessor terminal functions from 61 to 100.

Adjustment and Confirmation Procedures

Idling Current Adjustment

Procedure for adjusting idling current via trimmer resistors.

Protection Circuit Confirmation

Steps to confirm speaker relay operation and DC detection circuits.

Adjustment and Confirmation Procedures (Continued)

Current Detection Circuit Test

Testing the current detection circuit with a 50Hz square signal and loads.

FL Tube Test Mode