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Technics RS-BX747

Technics RS-BX747
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Table of Contents

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Technics RS-BX747 Specifications

General IconGeneral
Track System4-track, 2-channel stereo
Tape Speed4.8 cm/s
Dimensions430 x 125 x 300mm
Weight5.5 kg
Tape TypeType I, Type II, Type IV
Frequency Response20 Hz - 20 kHz
Wow and Flutter0.07%
Output0.5V (Line)
DolbyDolby B, Dolby C
Heads3 (1 x recording, 1 x playback, 1 x erase)
InputLine In

Summary

Specifications

CASSETTE DECK SECTION

Details of the cassette deck's mechanical and electrical specifications.

Front Panel Controls Overview

Front Panel Adjustments and Indicators

Disassembly - Cabinet and Front Panel

Cabinet Removal Procedure

Steps to remove the main outer cabinet of the unit.

Front Panel Assembly Removal

Instructions for detaching and removing the front panel assembly.

Disassembly - PCBs and Mechanism Unit

Disassembly - Power and Motor Components

Disassembly - Cassette Holder and Detection Mechanisms

Adjustment Procedures

EEPROM Data Writing

Procedure for writing optimal recording bias and equalization data to the EEPROM.

Measurements and Adjustments

Head Azimuth Adjustment

Method for adjusting the head azimuth for accurate sound reproduction.

Tape Speed and Playback Gain Settings

Procedures for checking tape speed and adjusting playback gain levels.

Bias, HX PRO, and Erase Current Adjustments

Adjustments for AC bias, HX PRO, and erase current for optimal recording.

Overall Gain and Frequency Response

Steps to adjust overall gain and verify frequency response characteristics.

Troubleshooting Guide

Mechanism Operation Fault Diagnosis

Flowchart for diagnosing issues with mechanism operation, including play, FF/REW.

Microcomputer and Control Circuit Issues

Troubleshooting steps for microcomputer, solenoid control, and motor drive circuits.

IC Terminal Functions - Microcomputer

IC503 (M38172 M2500 F): MICROCOMPUTER

Detailed pin functions, I/O divisions, and check points for the main microcomputer.

Block Diagram

Schematic Diagram

Terminal Guide of ICs, Transistors, and Diodes

Cross-reference of component types with their terminal functions and part numbers.

Printed Circuit Boards Layout

Direct Drive Motor Troubleshooting

Wiring Connection Diagram

Replacement Parts List

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