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Technics RS-TR272

Technics RS-TR272
39 pages
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Technics RS-TR272 Specifications

General IconGeneral
Track System4-track, 2-channel stereo
Tape Speed4.8 cm/s
Signal to Noise Ratio (Normal Tape)58dB
Signal to Noise Ratio (Chrome Tape)60dB
Signal to Noise Ratio (Metal Tape)62dB
Signal to Noise Ratio (Dolby B)68dB
Dimensions (W x H x D)430 x 125 x 290mm
TypeDouble Cassette Deck
Frequency Response (Normal Tape)30 Hz - 14 kHz
Frequency Response (Chrome Tape)30 Hz - 16 kHz
Wow and Flutter0.08% WRMS
Power SupplyAC 120V
Heads2 x playback/record, 2 x erase

Summary

Specifications

Cassette Deck Section

Describes deck system, track system, recording system, bias frequency, erasing system, and heads.

Critical Safety Warning

Operation Checks

Checking Procedure For Each Major P.C.B.

Procedures for checking mechanism control, FL, and Dolby noise reduction PCBs.

EEPROM Data Write

EEPROM Write Procedure

Steps for writing data to a new EEPROM after replacement.

Adjusted Value Rewrite

Rewrite Procedure

Step-by-step procedure for rewriting adjusted values.

Adjustment Procedures

Adjusting Playback Gain

Procedure for adjusting playback gain.

Final Adjustments & Clearing

Adjusting Overall Gain and Frequency Characteristics

Procedure for overall gain and frequency characteristic adjustments.

Measurements and Adjustments

Specific Adjustments

Head Azimuth Adjustment

Procedure for adjusting head azimuth.

Tape Speed Adjustment

Procedure for adjusting tape speed.

Frequency Characteristic Checks

Schematic Diagrams Overview

Handling Precautions

General safety precautions for component handling and static electricity.

Main Circuit Diagram (GCGT Areas)

Main Circuit Diagram (GN Area)

Mechanism Control Circuits

Main P.C.B. Layout (GC,GT)

Main P.C.B. Layout (GN)

Mechanism Control P.C.B. (Deck 2) Layout

Component Placement Diagram

Visual layout of components on Deck 2 mechanism control PCB.

Mechanism PCB Layouts

Mechanism Control P.C.B. (Deck 1) Layout

Component layout for Deck 1 mechanism control PCB.

Wiring Connection Diagram

Main P.C.B. Connections

Wiring diagram for the main PCB to other sections.

Mechanism Parts Location (Deck 1)

Playback Mechanism Parts

Diagram showing part locations for Deck 1 playback mechanism.

Mechanism Parts Location (Deck 2)

RecordPlayback Mechanism Parts

Diagram showing part locations for Deck 2 mechanism.

Mechanism Parts List

Deck 1 Mechanism Parts

List of mechanical parts for Deck 1.

Deck 2 Mechanism Parts

List of mechanical parts for Deck 2.

Replacement Parts List

Resistors & Capacitors

Resistors List

List of replacement resistors.

Resistors & Capacitors (Continued)

Capacitors List

List of replacement capacitors.

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