Onkyo TX-NR545 - Service Manual

Service Manual
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 MESUREMENTS TO DETERMINE THAT EXPOSED PARTS ARE ACCEPTABLY
INSULATED FROM THE SUPPLY CIRCUIT BEFORE RETURNING THE APPLIANCE TO THE
CUSTOMER.
Published by Onkyo & Pioneer Corporation Grobal CS Department
TX-NR545
AV RECEIVER
Ref.No. : ４５１９
✔ Pre Issue (15-May)
✔ Final Issue (15-Jun)
CONTENTS
✔ Front Cover (This page)
✔ Note for Parts List
✔ Panel
✔ Reset
✔ Amp Diag Mode after Abnormal Conditions
✔ Model and Destination
✔ Firmware
✔ Adjustment ( Unnecessary )
✔ Hookup and Setting
✔ Trouble Shoot
✔ Disassembly
✔ Schematic Diagram
✔ Exploded View
✔ Appendix

Onkyo TX-NR545 Specifications

General

Brand	Onkyo
Model	TX-NR545
Category	Receiver
Language	English

Summary

Panel Description

Reset Procedures

Unit Reset Procedure

Step-by-step guide to reset the AV receiver unit to its default state.

Abnormal Condition Diagnostics

Protect Mode Explanation

Description of unit behavior when abnormal conditions are detected.

Self-Diagnostic Operation

Details on how the self-diagnostic function operates.

Self-Diagnostic Display Modes

Information on how diagnostic results are displayed on the unit's FL tube.

Repair and Cause Confirmation

Steps for confirming protect cause and clearing diagnostic information.

Model and Destination Check

Firmware Management

Firmware Version Check and Update Preparation

Instructions for checking firmware versions and preparing for updates.

Firmware Update Procedure (Service Mode)

Detailed steps for updating firmware via USB in service mode.

Troubleshooting Hardware Issues

Troubleshooting No Sound (HDMI Input)

Identifies PCBs related to no sound from HDMI input.

Troubleshooting No Sound (Optical Input)

Identifies PCBs related to no sound from optical input.

Troubleshooting No Sound (Analog Input)

Identifies PCBs related to no sound from analog input.

Troubleshooting No Picture (HDMI)

Troubleshooting No Picture (Component;HDMI)

Troubleshooting No Picture (Composite;HDMI)

Troubleshooting No Power Issues

Disassembly Procedures

Power Supply and Digital PCB Disassembly

Amplifier Section Disassembly (Part 1)

Amplifier Section Disassembly (Part 2)

Amplifier Section Disassembly (Part 3)

Amplifier Section Disassembly (Part 4)

Schematic Diagrams

Audio Block Diagram

Block diagram illustrating the audio signal path and processing.

Video Block Diagram

Block diagram illustrating the video signal path and processing.

Digital Audio Block Diagram

Block diagram detailing digital audio signal flow.

ASP Section Schematic

Amplifier Section Schematic

Schematic diagram of the amplifier circuits.

Amplifier Voltage Amplification Schematic

Schematic detailing the voltage amplification stages of the amplifier.

Power Supply Schematic

Schematic diagram of the power supply unit.

Video and Speaker Output Terminals

Display Section Schematic

Display Section Schematic (DTR)

MPU Section Schematic

Schematic diagram of the Microprocessor Unit.

VMPU and Power Supply Schematic

Schematic for VMPU and related power supply circuits.

HDMI and Decoder Schematic

Schematic diagram of the HDMI interface and decoder circuitry.

Video Processor Schematic

Schematic diagram of the video processing unit.

NET;USB Power Section Schematic

ARM, DIR, and DAC Section Schematic

Schematic showing ARM processor, DIR, and DAC connections.

ARM Memory Schematic

DSP Section Schematic

Schematic diagram of the Digital Signal Processor.

Tuner Section Schematic

Exploded View

Front Panel Exploded View

Heat Sink Assembly Exploded View

Rear Panel Exploded View

Appendix

Test Mode Entry Procedure

Steps to enter various test modes for the unit.

Audio Debug Mode

Instructions for entering and using the audio debug mode.

Debug Mode Information

Cooling Fan Operation

Service Information Mode

Procedure to enter and exit service information mode for status analysis.