Matsui LM20N2 LCD TV - Service Manual or Schematics

Mad Professor · Joined: 14 Sep 2008 Posts: 25

Icey: I have not done any more work on this unit since my last post.

But as I said before when I removed Q7, Q8, Q9, Q10, Q11, Q12, Q13, Q14, and then try switching on the unit, the unit powers up, and stays on, but the backlight does not come on.

If you shine a bright light on the screen at the right angle you can see that the screen is working, and with a few presses of the menu button, you can get to a program and you will also have sound.

I am still trying to hunt down a Schematic for the unit or just the power board, but as yet have been unable to.

Can you please let us know how you get on.

Best Regards.

Mad Professor · Joined: 14 Sep 2008 Posts: 25

If you look at the PCB's you can see the logo for Nexgen Mediatech Inc.

So it looks like Matsui have just rebaged it, so I am trying to find out what the model number is for Nexgen Mediatech Inc.

Mad Professor · Joined: 14 Sep 2008 Posts: 25

This "CHIMEI N-3205" looks very much like the Matsui LM20N2.

CHIMEI N-3205

Matsui LM20N2

Guest · Posted: Tue Oct 14, 2008 10:10 pm Post subject:

i might just have to fork out for a new tv, very anoying, im not taking it to be fixed as they will either rip me off or not have a clue. do u not know which a power board that would work mad proffesor?

lordmpl · Joined: 05 Apr 2009 Posts: 1 Location: Norwich, UK

I too have the same problem as you, just wondering if you have managed to source the caps yet, I can see the ones on digikey but the postage as far as i can work out is $59. The caps are only $4. cannot seem to source anything in the UK, have been to all the local TV repair shops around Norwich and nothing.

I can get the whole PCB for $149, but the TV is not worth that sort of money, especially when the components if sourcable are only going to be $10 at most.

Also one question, when searching for 0.27uf caps i get alot of results for 270nf is it the same, i get confused with it all sometimes??

Thanks for any info, Mark.

vtech · Joined: 08 May 2006 Posts: 1264 Location: USA

Nano, micro and pico (farad) are NOT the same. Nano is mainly used in Europe.

Three prefixes (multipliers) are used, µ (micro), n (nano) and p (pico):

* µ means 10-6 (millionth), so 1000000µF = 1F
* n means 10-9 (thousand-millionth), so 1000nF = 1µF
* p means 10-12 (million-millionth), so 1000pF = 1nF

So .27uf is equal to270nf or 270000pf

rohin · Guest

hi all
i have a matsui lcd tv model number lm20n2.
dont have a picture but the sounds great can it be fixed or sound i get a new tv ...e-mail me @ [email protected]
thank