Question about Thomson 21DC320 21" TV

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Thomson tv, model quadra 21

Picture is narrowed both side vertically. whether any adjustment can be done through remote. recently eht was replced.

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  • joydip Nov 01, 2007

    no change

  • Anonymous Apr 08, 2009

    How to reset the tuner into tv..



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  • 93 Answers

Reset the memory of your tv,or the reset it just simply unplug the unit,then press together the menu and the vol+ buttons,then press the power switch,when its on,release together the from pressing menu and vol+

Posted on Oct 19, 2007


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My Thomson Tv quadra 21 inches nicam digital sterio purchased in chennai india is not responding to color, contrast adjustment, technician says memory is lost in chip and if the code is known memory can be...


It is not the code problem. There is only one code, and it is for adjusting its parameters , and have beed done at the factory, and havenot, and should not be changed at all. You just inform them to check its chroma section, with its schematic dagram nearby him, whether the colour and contrast pin control voltage of the chroma IC is vaiying according to the increase or decrese to the parameters with its remote or with its fron panel control. If it does not varies, tell him to check its system control side. OK

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Red colour on screen

if crt pic tube magnitized need to degausse with coil

Jun 01, 2010 | Thomson 21DC320 21" TV

1 Answer

Red colour appearing on screen

Your tv could have one of several faults. None of which are to be tackled by anyone except a qualified engineer due to the electric shock hazard.the first problem could be the crt (tube) the second could be the componets on crt base circuit board ie resistors or ic.
With a tv 9 years old it may not be economical to carry out a reair.

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1 Answer

Vertical line at edge of AV1 channel

hi! he might have adjusted the vertical hold and height including the linearity. normally on the board you would see a trimmer resistor with a label v-hold this is to stop the rolling, v- height for the size of the picture. and linearity for the evenness of the picture from top to bottom.

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check the yoke magnets alignment

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first, check the vertical section maybe they had a lose connection specially the ic, second check the supply of the heater

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were you able to get the problem solved Even I have the same problem

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