50Hz Colour Television - Training Manual - DA100 & DW100 Chassis

Oct 12, 2026

50Hz Colour Television training manual detailing the DA100 and DW100 chassis architecture and key subsystem operation. The contents cover switch mode power supply functions including start-up, voltage regulation, protection against over-voltage and over-current, and the slave processor power supply with degauss circuit and 5V regulator. It further describes class D output stages, audio and field outputs, vertical fly-back, and the video and sync processor covering analogue front-end, clamping, gain control, converters, clock oscillator, protection circuitry, and scan velocity modulation.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages23

Reading Time58 min

AccessFree to download

POWER SUPPLIES

Switch Mode Power Supply

Start up operation

Voltage regulation

Over-voltage Protection

Over-current control

Slave Processor Power Supply

Degauss Circuit

5v Regulator

DA100 (59ESD7H and 66ESD7H) 4:3 chassis

DW100 (56FW53H to 6FW54H) 16:9 chassis

CLASS D OUTPUT STAGES

Tda7480 Pin Functions

Audio Output

Field Output

Vertical Fly-back

VIDEO AND SYNC PROCESSOR

Description

Analogue front-end

Input Selector

Clamping

Automatic Gain Control

Analogue-to-Digital Converters

Digitally Controlled Clock Oscillator

Analogue Video Output

Average Beam Current Limiting

Protection Circuitry

Scan Velocity Modulation Output

PICTURE ROTATION

SCAN VELOCITY MODULATOR

LINE OUTPUT STAGE

East West Circuit

MICROPROCESSOR CONTROL

Reset

PROTECTION

Microprocessor

Audio Output

Beam Current

Horizontal Mute

Video/Sync Processor

Safety

Vprot

50Hz Colour Television DA100 and DW100 Chassis Contents POWER SUPPLIES........................................................................................................................... 1 Switch Mode Power Supply ...................................................................................................... 1 Start up operation........................................................................................................... 1 Voltage regulation ..........................................................................................................2 Over-voltage Protection ..................................................................................................2 Over-current control .......................................................................................................2 Slave Processor Power Supply.................................................................................................3 Degauss Circuit........................................................................................................................4 5v Regulator ............................................................................................................................5 DA100 (59ESD7H and 66ESD7H) 4:3 chassis................................................................5 DW100 (56FW53H to 6FW54H) 16:9 chassis .................................................................6 CLASS D OUTPUT STAGES ............................................................................................................7 Tda7480 Pin Functions.............................................................................................................7 Pin 9 – Frequency ..........................................................................................................7 Pin 12 – Mute/Standby function ......................................................................................7 Audio Output ............................................................................................................................8 Field Output .............................................................................................................................9 Vertical Fly-back........................................................................................................... 10 VIDEO AND SYNC PROCESSOR ................................................................................................... 11 Description ............................................................................................................................. 11 Analogue front-end ....................................................................................................... 11 Input Selector ............................................................................................................... 11 Clamping...................................................................................................................... 11 Automatic Gain Control ................................................................................................ 12 Analogue-to-Digital Converters ..................................................................................... 12 Digitally Controlled Clock Oscillator .............................................................................. 12 Analogue Video Output ................................................................................................ 12 Average Beam Current Limiting .................................................................................... 12 Protection Circuitry ....................................................................................................... 12 Scan Velocity Modulation Output .................................................................................. 12 PICTURE ROTATION...................................................

FAQs

What power supply sections are described for the DA100 and DW100 chassis?

The manual covers switch mode power supply, start-up operation, voltage regulation, over-voltage protection, over-current control, and the slave processor power supply. It also includes the degauss circuit and the 5V regulator sections for the DA100 and DW100 variants.

What topics are covered in the video and sync processor section?

It describes the video and sync processor including the analogue front-end, input selector, clamping, automatic gain control, analogue-to-digital converters, and a digitally controlled clock oscillator. It also includes analogue video output, beam current limiting, protection circuitry, and scan velocity modulation output.

Which output stages and signals are addressed in the document?

The document includes class D output stages with specific pin functions, audio output, field output, and vertical fly-back. It also discusses the line output stage and an East West circuit section.

Oct 12, 2026

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