Technics SA-EH550 Service Manual

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Technics SA-EH550 Specifications

General

Frequency Response	10 Hz - 100 kHz
Input Sensitivity	300mV (line)
Audio Channels	2
Video Connections	Composite
Type	Stereo Receiver
Output	Speaker outputs
Speaker load impedance	6 ohms
Digital inputs	Optical
Power Output	100 W per channel (8 ohms)
Output Power	100 W per channel (6 ohms, 1 kHz, THD 0.7%)

Summary

Specifications

Amplifier Section

Details power output, distortion, and impedance ratings for the amplifier stage.

Before Repair

Protection Circuitry

Caution for AC Mains Lead

Location of Controls

Installation

Connections

External Unit Connections

Listening to Compact Disc

CD Playback Modes

Direct Access Play

Program Play

Instructions for programming a custom sequence of up to 24 tracks for playback.

Sound Enhancement Features

Boosting the Super Woofer

Using Built-in Sound Quality/Sound Field Settings

Manual Equalizer (Manual EQ)

Acoustic Image (Al) Equalizer (3D AI EQ)

Surround Systems

Virtual Dolby Surround

Using an External Unit

Operation Checks and Component Replacement Procedures

Checking for Tuner and Power Supply PCBs

Steps to check the tuner and power supply printed circuit boards.

Checking for Operation PCB

Steps to check the operation printed circuit board.

Checking for the Main PCB

Procedures for checking the main printed circuit board.

Replacement for Regulator Transistor

Step-by-step guide for replacing regulator transistors.

Replacement for Power IC

Self-Diagnostic Mode

Schematic Diagram

Tuner Circuit

Operation Circuit

Main Circuit

Power Supply Circuit

Wiring Connection Diagram

Block Diagram

Replacement Parts List