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Toshiba MW27FN1 User Manual

Toshiba MW27FN1
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SERVICE MANUAL
COLOR TELEVISION/
VIDEO CASSETTE RECORDER/
DVD VIDEO PLAYER
MW27FN1
MW27FN1C
FILE NO. 140-200321

Other manuals for Toshiba MW27FN1

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Toshiba MW27FN1 Specifications

Display IconDisplay
screen size27 inches
resolution240 lines
Ports & Interfaces IconPorts & Interfaces
video out1 RCA (rear)
video in1 RCA (front and rear)
audio out1 pair L-R (rear)
audio inputs1 pair L-R (front and rear)
coaxial digital output1 (DVD only)
RF input1 (rear)
Weight and Dimensions IconWeight and Dimensions
weight100 lbs
box weight110 lbs
unit dimensions29.1” x 19.3” x 25.4”
carton dimensions33.5” x 23.5” x 30.5”

Summary

CAUTION

Location of the Required Marking

Indicates where the unit's rating sheet and safety caution labels are located.

SERVICING NOTICES ON CHECKING

Keep the Notices

Emphasizes retaining operational manual indications and notices for servicing.

Avoid Electric Shock

Warns about high voltage parts and avoiding electric shock during servicing.

Use Designated Parts

Stresses using manufacturer-specified parts, especially for safety-critical components.

Put Parts and Wires in Original Position

Advises returning parts and wires to their original configuration after assembly.

Take Care with Cathode-Ray Tube

Caution regarding handling the explosion-proof CRT to avoid shock hazards.

Avoid X-Ray Exposure

Advises caution when working on high-voltage circuits to prevent X-ray emission.

Safety Check After Servicing

Details insulation resistance checks required after performing service procedures.

HOW TO ORDER PARTS

Information for Ordering Parts

Specifies required details like model number, version letter, and part number for ordering.

IMPORTANT SAFEGUARDS

Read and Retain Instructions

Stresses reading and keeping safety/operating instructions for future reference.

Heed Warnings and Follow Instructions

Advises adhering to all unit warnings and following all operating instructions.

Cleaning and Attachments

Guidelines for unit cleaning and using only manufacturer-approved attachments.

Water, Moisture, and Accessories

Warns against using the unit near water and placing it on unstable surfaces or carts.

Ventilation and Power Sources

Guidelines for ensuring proper ventilation and selecting correct power sources.

Grounding, Polarization, and Cord Protection

Explains polarized plugs, grounding, and protecting power cords from damage.

Lightning, Power Lines, and Overloading

Precautions regarding lightning, power lines, and avoiding outlet overloading.

Object Entry, Liquids, and Outdoor Grounding

Warnings against object insertion, liquid spills, and explains antenna grounding.

Servicing Precautions

Advises referring servicing to qualified personnel and avoiding self-service.

Damage Requiring Service

Lists conditions requiring qualified service for unit repair due to damage or malfunction.

Replacement Parts

Stresses using manufacturer-specified parts to prevent fire, shock, or other hazards.

Safety Checks and Mounting

Requires post-repair safety checks and following manufacturer mounting guidelines.

Heat, Disc Tray, and Connecting

Guidelines on product placement, disc tray operation, and connecting to other equipment.

Sound Volume, Distortion, and Headphones

Precautions for sound volume, distortion, and headphone use to prevent hearing or speaker damage.

Laser Beam and Disc Usage

Warnings against direct laser exposure and using damaged or cracked discs.

CATV System Installer Note

Refers to NEC guidelines for proper cable system grounding and connection.

TAPE REMOVAL METHOD AT NO POWER SUPPLY

Removing Tape from Deck Chassis

Step-by-step instructions for removing a video tape from the deck chassis without power.

DISC REMOVAL METHOD AT NO POWER SUPPLY

Removing Disc Tray

Instructions for safely removing the disc tray by manipulating the rack loading mechanism.

PARENTAL CONTROL - RATING LEVEL 4 DIGIT PASSWORD CANCELLATION

Cancelling the 4-Digit Password

Procedure to cancel the stored 4-digit password in the Rating Level menu.

TRAY LOCK

Unlocking the Tray Lock

Steps to unlock the tray lock, which also resets player settings to factory defaults.

GENERAL SPECIFICATIONS (MW27FN1)

TV System Specifications

Details CRT size, deflection, color system, speaker, and sound output for the TV system.

VCR System Specifications

Lists VCR video system, heads, tape speed, fast forward/rewind times, and picture search.

DVD System Specifications

Covers DVD color system, disc diameter, playback time, search speed, and slow speed.

Tuning System Specifications

Details broadcasting system, tuning system, input impedance, and intermediate frequency.

Signal Specifications

Lists input/output levels, S/N ratios, and frequency responses for video, audio, and hi-fi audio signals.

Power Specifications

Details power source, consumption, standby power, and protector components.

Regulation and Temperature

Covers safety regulations, operating temperature, and storage conditions.

Operating Humidity

Specifies the operating humidity range for the unit.

On-Screen Display Menu (TV/VCR)

Lists available menu options and functions for TV and VCR modes, including setup and controls.

On-Screen Display Menu (DVD)

Details DVD menu options, parental controls, disc playback functions, and system setup.

OSD Language

Lists supported OSD languages for TV/VCR and DVD interfaces.

Clock, Timer, and Back-up Features

Covers calendar range, timer events, one-touch recording, sleep timer, and timer back-up.

Remote Control Unit Functions

Lists all functions controllable via the remote unit for TV/VCR and DVD operations.

Features and Accessories

Enumerates unit features like auto head cleaning, auto tracking, and lists included accessories.

Interface and Terminals

Describes front/rear interface switches, indicators, and connection terminals for various signals.

Set Size, Weight, and Carton

Provides physical dimensions, weight, and carton specifications for the unit.

Material Specifications

Lists material details for the cabinet and PCB, including halogen-free requirements.

GENERAL SPECIFICATIONS (MW27FN1C)

TV System Specifications

Details CRT size, deflection, color system, speaker, and sound output for the TV system.

VCR System Specifications

Lists VCR video system, heads, tape speed, fast forward/rewind times, and picture search.

DVD System Specifications

Covers DVD color system, disc diameter, playback time, search speed, and slow speed.

Tuning System Specifications

Details broadcasting system, tuning system, input impedance, and intermediate frequency.

Signal Specifications

Lists input/output levels, S/N ratios, and frequency responses for video, audio, and hi-fi audio signals.

Power Specifications

Details power source, consumption, standby power, and protector components.

Regulation and Temperature

Covers safety regulations, operating temperature, and storage conditions.

Operating Humidity

Specifies the operating humidity range for the unit.

On-Screen Display Menu (TV/VCR)

Lists available menu options and functions for TV and VCR modes, including setup and controls.

On-Screen Display Menu (DVD)

Details DVD menu options, parental controls, disc playback functions, and system setup.

OSD Language

Lists supported OSD languages for TV/VCR and DVD interfaces.

Clock, Timer, and Back-up Features

Covers calendar range, timer events, one-touch recording, sleep timer, and timer back-up.

Remote Control Unit Functions

Lists all functions controllable via the remote unit for TV/VCR and DVD operations.

Features and Accessories

Enumerates unit features like auto head cleaning, auto tracking, and lists included accessories.

Interface and Terminals

Describes front/rear interface switches, indicators, and connection terminals for various signals.

Set Size, Weight, and Carton

Provides physical dimensions, weight, and carton specifications for the unit.

Material Specifications

Lists material details for the cabinet and PCB, including halogen-free requirements.

DISASSEMBLY INSTRUCTIONS

Removal of Mechanical Parts and P.C. Boards

Details the removal of back cabinet, CRT PCB, TV/DVD/VCR block, and VCR deck.

Removal of VCR, DVD, and Deflection PCBs

Instructions for removing VCR PCB, VCR Deck, DVD PCB/Deck, and Deflection PCB.

Removal of VCR Deck Parts

Covers removal of top bracket, cassette holder, link units, and levers.

Loading Motor, Tension Assembly, and Related Parts

Steps for removing loading motor, tension assembly, and associated bands/springs.

T Brake Arm/Band and Reel/Idler Assembly Removal

Procedures for removing T brake arm, band, S/T reels, and idler arm assembly.

Cassette Opener, A/C Head, FE Head, and Cylinder Unit Removal

Instructions for removing cassette opener, A/C head, FE head, and cylinder unit assembly.

Capstan DD Unit and Gear Assembly Removal

Steps for removing capstan DD unit, main cam, pinch roller cam, joint gear, and loading gear units.

Clutch Assembly and Cassette Guide Post Removal

Procedures for removing clutch assembly, ring spring, clutch lever, and cassette guide post.

Removal of DVD Deck Parts

Covers tray removal, main chassis assembly, rack loading, and clamper assembly.

Traverse Holder, Switch PCB, and Rack Feed Assembly Removal

Instructions for removing traverse holder, switch PCB, and rack feed assembly.

Relay PCB, Gear, and Idler Arm Removal

Steps for removing relay PCB, gears, and idler arm.

Feed Motor Removal

Instructions for removing the feed motor and motor gear.

Removal and Installation of Anode Cap

Detailed steps for safely removing and installing the anode cap, including discharge.

Removal and Installation of Flat Package IC

Procedures for removing and installing flat package ICs, including desoldering and soldering.

KEY TO ABBREVIATIONS

Abbreviations A-L

Lists technical abbreviations from A to L used in the manual for clarity.

Abbreviations M-Y

Lists technical abbreviations from M to Y used in the manual for clarity.

SERVICE MODE LIST

Entering Service Mode

Instructions on how to enter service modes by pressing specific buttons simultaneously.

Service Mode Functions and Operations

Details various service modes and their corresponding operations and standard times.

PREVENTIVE CHECKS AND SERVICE INTERVALS

Parts Service Interval Table

Table indicating recommended service intervals for various parts based on usage hours.

Confirmation of Hours Used

Procedure to check POWER ON and PLAY/REC total hours displayed on the screen.

Cleaning Procedures

Guidelines for cleaning audio control heads, tape running systems, and cylinders.

WHEN REPLACING EEPROM (MEMORY) IC

EEPROM IC Replacement Steps

Steps for replacing the EEPROM IC and ensuring correct data settings are applied.

SERVICING FIXTURES AND TOOLS

Required Tools for Servicing

Lists specialized tools and their part numbers necessary for performing service.

PREPARATION FOR SERVICING

Servicing Preparation Steps

Outlines initial steps for servicing, including volume setting and power cord handling.

MECHANICAL ADJUSTMENTS

Confirmation and Adjustment of Reel Disk Height

Procedure to adjust reel disk height using specific jigs and washers for proper tape movement.

Confirmation and Adjustment of Tension Post Position

Steps to adjust tension arm position for optimal tape running during playback.

Confirmation of Playback Torque and Back Tension

Procedures to confirm playback and back tension torque using specialized tapes and meters.

Confirmation of VSR Torque

Procedure to confirm VSR torque using a gauge in Picture Search (Rewind) mode.

Confirmation of Reel Brake Torque

Steps to confirm reel brake torque for S Reel and T Reel during Fast Forward mode.

Guide Roller Adjustment

Adjusting the guide roller and confirming reflected picture of stamp mark.

Audio/Control Head Confirmation and Adjustment

Adjusting the audio/control head height and audio level for optimal performance.

Tape Running Adjustment (X Value)

Adjusting X value for maximum envelope waveform output during tape running.

Mechanism Adjustment Parts Location Guide

Illustrates the location of key parts for mechanical adjustments on the mechanism assembly.

ELECTRICAL ADJUSTMENTS

Before Making Electrical Adjustments

Outlines necessary precautions, tools, and initial setup for electrical adjustments.

Basic Adjustments (VCR Section)

Covers PG Shifter adjustment for the VCR section, including automatic and manual tuning.

Constant Voltage Adjustment

Procedure to adjust constant voltage to 135.5 ± 0.5V using a digital voltmeter.

Cut Off Adjustment

Adjusting bias, drive settings, and screen volume for a proper raster.

White Balance Adjustment

Adjusting white balance using gray scale patterns for accurate color reproduction.

Focus Adjustment

Adjusting focus volume to achieve a sharp and distinct picture display.

Horizontal Position and Size Adjustments

Adjusting horizontal position and size to minimize screen overscan.

Vertical Position, Size, and Linearity Adjustments

Procedures for adjusting vertical position, size, and linearity for screen alignment.

Trapezium Adjustment

Adjusting the trapezium to ensure vertical lines of the screen appear parallel.

Parabola, Corner Correction, and Bright Center Adjustments

Adjusting parabola, corner correction, and bright center for optimal picture geometry.

Tint Adjustment

Adjusting the tint control to achieve a straight line for the red color level.

Color Center Adjustment

Adjusting color center for RF, AV, and DVD inputs for accurate color display.

Sub Contrast Max Adjustment

Adjusting sub contrast max to achieve normal picture and specified step numbers.

Confirmation of Fixed Values

Verifying fixed values for various adjustment items across RF, AV, and DVD modes.

Purity and Convergence Adjustments

Procedures for static/dynamic convergence and purity using magnets and deflection yoke.

Electrical Adjustment Parts Location Guide (Wiring Connection)

Illustrates the location of parts and wiring connections for electrical adjustments.

DVD ST SOLUTION BLOCK DIAGRAM

DVD ST Solution Block Diagram Overview

High-level block diagram showing DVD solution architecture and signal flow.

Y/C/AUDIO/CCD/HEAD AMP BLOCK DIAGRAM

Y/C, Audio, CCD, Head Amp Block Diagram

Block diagram illustrating signal paths for Y/C, audio, CCD, and head amplifier functions.

MICON BLOCK DIAGRAM

MICON Block Diagram Overview

Block diagram detailing MICON system functions, connections, and control signals.

IN/OUT BLOCK DIAGRAM

IN/OUT Block Diagram Overview

Block diagram showing input/output signal paths, including jacks, switches, and LEDs.

CHROMA/IF BLOCK DIAGRM

Chroma and IF Block Diagram Overview

Block diagram illustrating the Chroma and IF signal processing circuits.

SOUND AMP BLOCK DIAGRAM

Sound Amplifier Block Diagram Overview

Block diagram detailing the sound amplifier and surround sound processing circuits.

HI-FI AUDIO/H.AMP/DEM BLOCK DIAGRM

Hi-Fi Audio and Demodulator Block Diagram

Block diagram for Hi-Fi audio, head amplifier, and demodulator functions.

COMB FILTER BLOCK DIAGRAM

Comb Filter Block Diagram Overview

Block diagram illustrating the digital comb filter circuitry and its signal connections.

DVD IN/OUT BLOCK DIAGRAM

DVD Input/Output Block Diagram Overview

Block diagram showing DVD input/output interfaces and related mixer functions.

REGULATOR BLOCK DIAGRAM

Regulator Block Diagram Overview

Block diagram illustrating the voltage regulator circuits and their power outputs.

TV BLOCK DIAGRAM

TV Block Diagram Overview

Block diagram showing the main functional blocks of the TV system.

PRINTED CIRCUIT BOARDS

DVD PCB Layout (Top and Bottom Sides)

Visual layout of the DVD printed circuit board, showing component placement on both sides.

VCR PCB Layout (Inserted Parts, Solder Side)

Component layout for the VCR PCB, showing inserted parts on the solder side.

VCR PCB Layout (Chip Mounted Parts, Solder Side)

Component layout for the VCR PCB, showing chip-mounted parts on the solder side.

Operation, Deflection, CRT/VM Coil PCB Layouts

Layouts for Operation, Deflection, and CRT/VM Coil PCBs on the solder side.

Relay/SW PCB Layouts

Layouts for Relay/SW PCBs, showing inserted and chip-mounted parts.

RF_AMP/DSP SCHEMATIC DIAGRAM (DVD PCB)

RF Amplifier and DSP Schematic

Detailed schematic of the RF amplifier and DSP section on the DVD PCB.

MOTOR DRIVE SCHEMATIC DIAGRAM (DVD PCB)

Motor Drive Schematic Overview

Schematic diagram illustrating the motor drive circuits for the DVD player.

MPEG SCHEMATIC DIAGRAM (DVD PCB)

MPEG Processor Schematic

Detailed schematic of the MPEG processor and its associated circuitry on the DVD PCB.

MEMORY SCHEMATIC DIAGRAM (DVD PCB)

Memory Circuit Schematic

Schematic diagram for the memory circuits, including SDRAM and Flash memory.

AUDIO/VIDEO SCHEMATIC DIAGRAM (DVD PCB)

Audio/Video Circuit Schematic

Schematic diagram for the audio and video output circuits, including DAC.

REGULATOR2 SCHEMATIC DIAGRAM (DVD PCB)

Regulator 2 Circuit Schematic

Schematic diagram for the secondary voltage regulator circuits.

Y/C/AUDIO/CCD/HEAD AMP SCHEMATIC DIAGRAM (VCR PCB)

Y/C, Audio, CCD, Head Amp Schematic

Schematic diagram for the Y/C, audio, CCD, and head amplifier circuits on the VCR PCB.

MICON SCHEMATIC DIAGRAM (VCR PCB)

MICON Circuit Schematic

Schematic diagram detailing the MICON (microcontroller) connections and functions.

IN/OUT SCHEMATIC DIAGRAM (VCR PCB)

Input/Output Circuit Schematic

Schematic diagram for the unit's input and output jacks and switching circuits.

CHROMA/IF SCHEMATIC DIAGRAM (VCR PCB)

Chroma and IF Circuit Schematic

Schematic diagram for the chroma and intermediate frequency (IF) processing circuits.

SOUND AMP/SURROUND SCHEMATIC DIAGRAM (VCR PCB)

Sound Amplifier and Surround Circuit Schematic

Schematic diagram for the sound amplifier and surround sound processing circuits.

HI-FI/DEMODULATOR SCHEMATIC DIAGRAM (VCR PCB)

Hi-Fi Audio and Demodulator Circuit Schematic

Schematic diagram for the Hi-Fi audio processing and demodulator functions.

DIGITAL COMB FILTER SCHEMATIC DIAGRAM (VCR PCB)

Digital Comb Filter Circuit Schematic

Schematic diagram illustrating the digital comb filter circuitry.

DVD IN/OUT SCHEMATIC DIAGRAM (VCR PCB)

DVD Input/Output Circuit Schematic

Schematic diagram for the DVD input/output interfaces and related circuitry.

REGULATOR SCHEMATIC DIAGRAM (VCR PCB)

Regulator Circuit Schematic

Schematic diagram detailing the various voltage regulator circuits.

TV POWER SCHEMATIC DIAGRAM (VCR PCB)

TV Power Supply Schematic

Schematic diagram for the TV power supply section, including switching and degauss circuits.

DEFLECTION SCHEMATIC DIAGRAM (DEFLECTION PCB)

Deflection Circuit Schematic

Schematic diagram for the deflection circuits, controlling CRT beam movement.

OPERATION SCHEMATIC DIAGRAM (OPERATION PCB)

Operation Circuit Schematic

Schematic diagram illustrating the operation controls and button interfaces.

CRT/SVM SCHEMATIC DIAGRAM (CRT PCB)

CRT and SVM Circuit Schematic

Schematic diagram for the CRT display and SVM (Service Mode/Vertical) control circuits.

RELAY/SW/FG SCHEMATIC DIAGRAM

Relay and Switch Schematic

Schematic diagram for the relay and switch circuits, including FG sensor.

INTERCONNECTION DIAGRAM

System Interconnection Overview

Diagram showing how major PCBs and components are interconnected within the system.

WAVEFORMS

RF_AMP/DSP Waveforms

Oscilloscope waveforms for the RF amplifier and DSP section.

Motor Drive Waveforms

Oscilloscope waveforms related to the motor drive signals.

MPEG Waveforms

Oscilloscope waveforms for the MPEG processor signals.

Audio/Video Waveforms

Oscilloscope waveforms for the audio and video signal processing.

Y/C, Audio, CCD, Head Amp Waveforms

Waveforms for Y/C, audio, CCD, and head amplifier signals.

Regulator 2 Waveforms

Oscilloscope waveforms measured from the secondary regulator circuits.

MICON Waveforms

Oscilloscope waveforms related to the MICON microcontroller signals.

Deflection Waveforms

Waveforms associated with the deflection control signals.

Sound Amp/Surround Waveforms

Oscilloscope waveforms for the sound amplifier and surround sound processing.

Hi-Fi/Demodulator Waveforms

Waveforms for the Hi-Fi audio and demodulator circuits.

Chroma/IF Waveforms

Oscilloscope waveforms for the chroma and IF signal processing.

DVD IN/OUT Waveforms

Waveforms related to the DVD input/output signals.

Digital Comb Filter Waveforms

Oscilloscope waveforms for the digital comb filter output.

CRT/SVM Waveforms

Waveforms related to the CRT display and SVM control signals.

MECHANICAL EXPLODED VIEW

CRT Assembly Exploded View

Exploded view showing the assembly of the CRT and associated components.

Main Unit Assembly Exploded View

Exploded view of the main unit, showing VCR, Operation, Deflection, and DVD deck assemblies.

CHASSIS EXPLODED VIEW (TOP VIEW)

Chassis Top View Exploded Diagram

Exploded view of the chassis from the top, detailing component placement and grease points.

CHASSIS EXPLODED VIEW (BOTTOM VIEW)

Chassis Bottom View Exploded Diagram

Exploded view of the chassis from the bottom, showing component placement and grease points.

DVD DECK EXPLODED VIEW

DVD Deck Assembly Exploded Diagram

Exploded view of the DVD deck, indicating parts and grease application points.

MECHANICAL REPLACEMENT PARTS LIST

Mechanical Parts List (Location 101-141)

List of mechanical replacement parts with location numbers, TSB P/N, reference, and description.

CHASSIS REPLACEMENT PARTS LIST

Chassis Parts List (Location 300-510)

List of chassis replacement parts including location, TSB P/N, reference, and description.

DVD DECK REPLACEMENT PARTS LIST

DVD Deck Parts List (Location 600-705)

List of DVD deck replacement parts with location numbers, TSB P/N, reference, and description.

ELECTRICAL REPLACEMENT PARTS LIST

Resistors and Capacitors

List of replacement resistors and capacitors with location, TSB P/N, reference, and description.

Diodes (Location D101-D1728)

List of replacement diodes with location, TSB P/N, reference, and description.

Diodes (Location D1729-D5502) and ICs

List of replacement diodes and ICs with location, TSB P/N, reference, and description.

Transistors (Location Q101-Q859)

List of replacement transistors with location, TSB P/N, reference, and description.

Transistors (Location Q3001-Q4511) and Coils/Transformers

List of replacement transistors, coils, and transformers with part details.

Coils/Transformers, Jacks, and Switches

List of replacement coils, transformers, jacks, and switches with part details.

PC Board Assemblies and Miscellaneous Parts

List of replacement PCB assemblies and miscellaneous items like core beads.

Miscellaneous Parts (Location B4004-X4501)

List of miscellaneous replacement parts including cores, batteries, transmitters, and crystals.

Miscellaneous Parts (Location TM101-X4501) and Capacitor Codes

List of miscellaneous parts like transmitters and crystals, and codes for capacitor types.

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