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Technics SA-EH50 - Service Manual

Technics SA-EH50
78 pages
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Table of Contents

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Technics SA-EH50 Specifications

General IconGeneral
Tuning BandsFM/AM
Frequency Range (FM)87.5 - 108 MHz
Signal-to-Noise Ratio (FM)70 dB
Signal-to-Noise Ratio (AM)50 dB
FM Harmonic Distortion0.3%
Selectivity (FM)70 dB
Tuner TypeDigital
Preset Stations30 (FM 20, AM 10)
Sensitivity (FM)1.2 µV (12.8 dBf)
Frequency Response20Hz to 15kHz

Summary

Specifications

Amplifier Section

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

FM Tuner Section

Covers frequency range, sensitivity, and S/N ratio for FM reception.

AM Tuner Section

Details frequency range and sensitivity for AM reception.

Timer Section

Explains clock and timer functions including play and REC timers.

General Specifications

Lists power consumption, supply voltage, dimensions, and weight.

Before Repair

Protection Circuitry

Explains the unit's protection circuitry and troubleshooting steps.

Accessories

Lists included accessories with part numbers and quantities.

AC Main Lead Safety Caution

Fuse Replacement Procedure

Instructions on how to safely replace the fuse in the AC plug.

Connections

System Component Connections

Guides on connecting flat cables, antennas, and speakers to the system.

AC Power Connection

Details on connecting the AC power cord to the unit.

External Unit Connections

Video and Audio Input;Output

Explains connections for VCR and Laser Disc Player.

Optional Antenna Setup

Provides guidance on installing optional FM/AM outdoor antennas.

Installation and Controls

Component Placement and Setup

Instructions for locating components and placing speakers for optimal sound.

Location of Controls

Identifies and explains the function of buttons and controls on the unit.

Setting the Clock and Timer

Memory Presetting

Automatic Memory Presetting

Describes the automatic process for storing broadcast station frequencies.

Manual Memory Presetting

Details the manual procedure for storing broadcast station frequencies.

Listening to Radio Broadcasts

Enjoying RDS Broadcasts

RDS Information Display Types

Explains how to display station name (PS) and program type (PTY).

Displaying Program Type (PTY)

Details how to view the program type information from RDS broadcasts.

PTY Display Code Explanations

Operation Checks and Component Replacement

P.C.B. Checking Procedures

Step-by-step guide for checking the tuner, operation, and main printed circuit boards.

Main Component Replacement

Procedures for replacing key components like power IC and transistors.

Power Supply and Operation Check

Unit Power Supply Alone

Instructions for supplying power to the unit independently for testing.

Operation Verification

How to check unit operation by inputting signals and observing outputs.

Self-Diagnostic Mode

Displaying Malfunction Codes

Explains how the unit displays error codes for malfunctions.

Returning to Normal Display

Steps to exit diagnostic mode and return to normal operation display.

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