Onkyo HTR-280(B) User Manual

HT-R280
SERVICE MANUAL
AV RECEIVER
MODEL
HT-R280(B)
Ref. No. 4212
072010
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.
RC-762M
HT-R280(B) in HTiB “AVX-280(B)”
<MDC> : 120V, 60Hz, Canadian model
Black model

Onkyo HTR-280(B) Specifications

General

Channels	5.1
Total Harmonic Distortion	0.08%
Frequency Response	10 Hz - 100 kHz
Audio Formats Supported	Dolby Digital, DTS
Speaker Load Impedance	6 - 16 ohms
FM Tuner	Yes
AM Tuner	Yes
Tuning Range	FM 87.5 - 108 MHz, AM 522 - 1611 kHz
Video Connections	Composite Video
Input Sensitivity and Impedance	200 mV/47 kΩ
Digital Audio Inputs	1 x Optical, 1 x Coaxial
Power Output	100W per channel into 6 Ohms
Signal-to-Noise Ratio	100 dB (Line)

Summary

Troubleshooting Guides

No Power Issues

Flowchart for diagnosing and resolving no power problems.

No Display Issues

Flowchart for diagnosing and resolving no display problems.

No Sound Issues

Flowchart for diagnosing and resolving no sound problems.

No Picture Issues

Flowchart for diagnosing and resolving no picture problems.

System Diagrams and Layouts

Block Diagrams (HDMI Video & Digital Audio)

High-level overview of HDMI and audio signal paths.

Wiring Diagram

Diagram showing internal wiring connections between components.

Schematic Diagrams

Detailed electrical circuit schematics for various sections.

Printed Circuit Board Views

Layouts of major circuit boards for component identification.

Firmware Update Procedures

Check Firmware Version

Instructions for verifying current firmware versions on the unit.

Update Preparation

Steps required to prepare for firmware update.

Update Execution

Step-by-step instructions for performing firmware updates.

Parts Lists

Exploded View Parts List

Illustrated list of parts for physical assembly and replacement.