Teac CX-270 User Manual

TEAC.
SERVICE MANUAL
Hay
—€X&270/CX-210
Stereo Cassette Deck
CONTENTS
1 Specifications and service data... 1... ce ee ee eee ene 2
Ds AGRSEUOCAENINN «ioe vic sods v0:ns sanior say 8 o's. Bc ich) csr Fp “0h B.'s ae ieioc ead! BR wn tL avai, ce se. wea erety 3
3 Case and front panel removal is Sa Sey we ca AF es a Ta 8 DEEN aes Ten Pork aa ide ae & ta a 4
4 Mechanical adjustments and checks ........... 0c cee eee eee eee eee nae 5
5 Electrical adjustments and checks .. 2... 2... cee cee ee ee ee eee ee eee 6
§& Block diagram ws... co wee ER Taw TAEDA ee ede eee basi Rccoe kl 10
2° Mee CU VAG RAINE 3. waive sen ssias: 1s, Zee soy she once -&. vcs bop mete gcse exw es 2 Seeer sb ab ea decd a; dae Raya Ede wee aya Spy 11
8 Lubrication and voltage conversion 2... 0... ee ce eee eee ee 12
9 Exploded views and parts list... 0... ee ee eee eee 13
10 PC boards and parts list 2... ke ee ee ee ee ee eens 22
Effective: May, 1979 B90013 5704000600

Teac CX-270 Specifications

General

Brand	Teac
Model	CX-270
Category	Cassette Player
Language	English

Summary

Specifications and Service Data

Specifications

Detailed technical specifications including input/output levels, equalization, and power requirements.

Service Data - Mechanical

Mechanical specifications like tape speed, wow/flutter, and pinch roller pressure.

Service Data - Electrical

Electrical specifications like frequency response, signal-to-noise ratio, and distortion.

Parts Location

Component Identification

Illustration showing the location of major internal and external components.

Case and Front Panel Removal

Disassembly Procedure

Exploded view illustrating the step-by-step disassembly of the unit's case and front panel.

Mechanical Adjustments and Checks

Test Equipment

Lists necessary test equipment for performing mechanical adjustments and checks.

Capstan Assembly Thrust Adjustment

Procedure for adjusting capstan assembly thrust to specifications.

Tape Speed Adjustment

Steps for checking and adjusting tape speed using test tapes.

Electrical Adjustments and Checks

General Notices

Important general notices before performing electrical adjustments and checks.

Required Test Equipment

Lists required test equipment for electrical adjustments and checks.

Test Setup Preparations

Describes the basic test setup and switch settings for electrical checks.

Playback Performance Checks

Procedures for checking playback performance, including azimuth, output level, and frequency response.

Monitor Performance Checks

Procedures for checking monitor performance in record-pause mode.

Recording Performance Checks

Steps to check recording performance, including bias, level, distortion, and frequency response.

Adjustment and Test Point Locations

Identifies specific adjustment points and test locations on the circuit.

Block Diagram

System Overview

Schematic diagram illustrating the functional blocks of the cassette deck.

Level Diagram

Playback and Recording Levels

Diagrams showing signal levels in playback and recording sections.

Lubrication and Voltage Conversion

Lubrication Procedures

Specifies the type of oil and grease for lubrication and application points.

Voltage Selector Setting

Instructions for setting the voltage selector for different regions.

AC Power Frequency Adaptation

Information regarding AC power line frequency adaptation for the DC servo motor.

Exploded Views and Parts List

Main Assembly Parts

Exploded view and list of major external and internal parts.

PC Boards and Parts List

Rec/Play Ampl PCB Assembly

Diagram and component list for the Rec/Play Ampl PCB.

Meter PCB Assembly

Diagram and component list for the Meter PCB.

Schematic Diagram

Circuit Schematics

Detailed circuit schematics for the cassette deck.

Assembling Hardware Coding List

Screw and Hardware Identification

List and visual guide for identifying various screws, washers, and nuts used in assembly.