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Sony TC-WE635 Service Manual

Sony TC-WE635
42 pages
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SERVICE MANUAL
US Model
Canadian Model
AEP Model
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E Model
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Chinese Model
STEREO CASSETTE DECK
MICROFILM
SPECIFICATIONS
Dolby noise reduction extension manufactured under license
from Dolby Laboratories Licensing Corporation.
HX Pro originated by Bang & Olufsen. “DOLBY”, the double-D
symbol a and “HX PRO” are trademarks of Dolby Laboratories
Licensing Corporation.
TC-WE635
— Continued on next page —
Model Name Using Similar Mechanism TC-WE425/WE525/WR681
Transport Mechanism Type TCM-230ASR4/HSR4

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Sony TC-WE635 Specifications

General IconGeneral
BrandSony
ModelTC-WE635
CategoryCassette Player
LanguageEnglish

Summary

Specifications

System

Details the recording system and fast-winding times.

Frequency Response

Specifies the frequency response for different tape types.

Safety Check-out

AC Leakage Measurement

Procedure for checking AC leakage current from metal parts.

General Section

Location of Parts and Controls

Identifies and labels the various controls on the front panel.

Disassembly Procedures

Case Disassembly

Steps for removing the external case of the unit.

Front Panel Assembly

Procedure for removing the front panel assembly.

Cassette Lid Assembly

Steps for removing the cassette lid assembly.

Mechanism Deck Assembly

Procedure for removing the mechanism deck assembly.

Leaf SW (REC/PB) Board

Steps for removing the leaf switch (REC/PB) board.

Pinch Lever Assembly

Steps for removing the pinch lever assemblies.

Flywheel Assembly

Steps for removing the flywheel assemblies.

Mechanical Block Assembly

Steps for removing the mechanical block assembly.

Head Relay Board

Steps for removing the head relay (REC/PB) board.

Service Mode

Key Check and Display Check Mode

Procedure for entering service mode for button and display checks.

Mechanical Adjustments

Torque Measurement

Procedure for measuring tape transport torque.

Electrical Adjustments

Standard Input/Output Levels

Settings for standard input and output signal levels.

Test Tape and Modes

Instructions for using test tapes and entering specific test modes.

Record/Playback Head Azimuth Adjustment

Procedure for aligning the record/playback head azimuth.

Tape Speed Adjustment

Procedure for adjusting tape speed accuracy.

Playback Level Adjustment

Procedure for setting the playback output level.

Bias Consumption Current Adjustment

Adjustment for bias consumption current.

Record Level Adjustment

Procedure for setting the record level.

Record Bias Adjustment

Procedure for adjusting the record bias.

Diagrams

Circuit Boards Location

Identifies the physical location of all circuit boards.

Waveforms

Illustrates expected signal waveforms for reference.

Main Board Diagrams

Printed Wiring Board - Main Section

Component layout for the main printed wiring board.

Schematic Diagram - Main Section (1/4)

Electrical schematic for the main board, part 1 of 4.

Schematic Diagram - Main Section (2/4)

Electrical schematic for the main board, part 2 of 4.

Schematic Diagram - Main Section (3/4)

Electrical schematic for the main board, part 3 of 4.

Schematic Diagram - Main Section (4/4)

Electrical schematic for the main board, part 4 of 4.

Deck Section Diagrams

Printed Wiring Board - Deck Section

Component layout for the deck section printed wiring board.

Schematic Diagram - Deck Section

Electrical schematic for the deck section.

Display Section Diagrams

Schematic Diagram - Display Section

Electrical schematic for the display section.

Printed Wiring Board - Display Section

Component layout for the display section printed wiring board.

Panel Section Diagrams

Schematic Diagram - Panel Section

Electrical schematic for the panel section.

Printed Wiring Board - Panel Section

Component layout for the panel section printed wiring board.

Power Section Diagrams

Schematic Diagram - Power Section

Electrical schematic for the power supply section.

Printed Wiring Board - Power Section

Component layout for the power section printed wiring board.

Component Diagrams

IC Pin Function

Details the pin assignments for integrated circuits.

Exploded Views

Case Section

Exploded view illustrating the unit's case components.

Chassis Section

Exploded view illustrating the unit's chassis components.

Cassette Holder Section

Exploded view illustrating the cassette holder assembly.

Front Panel Section

Exploded view illustrating the front panel components.

Tape Mechanism Section

Exploded view illustrating the tape transport mechanism.

Electrical Parts List

Head Relay, Leaf SW, and Main Components

Parts list for head relay, leaf switch, and main board components.

Main and Panel Components

Parts list for main and panel board components.

Main Board Components Listing

Detailed parts list for the main board.

Panel Board Components Listing

Detailed parts list for the panel board.

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