Question about Sharp Aquos LC-20B2U 20 in. LCD Television

1 Answer

Sharp Aquos LC-20B2U 20

Power shutdown, F3701 blown, replace F3701, it's work awhile, then the set shut down power again. What's problem?
Thank you for your help.

Posted by on

  • Anonymous May 23, 2008

    Same as above fuse keeps blowing, install new one works for a while then blows and tv shuts off

×

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 395 Answers

Replace the terminal pcb part # DUNTKB128DE03 you may be having a short in the secondary power supply. you can get the manual here https://www.vancebaldwin.com/shop/research_new/SHA/LC20B2UA.pdf to help you better trace the short. it can also be the main board too better to chase the problem than to make guesses.

Posted on Apr 19, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I have a sharp aquos model Sharp Aquos LC-20B2U 20 in. LCD Television . it works great for about 2 years, then suddenly shut down by itself. then it turns on again for a variable time, then once again...


if your TV lights the indicator when you power it on,, your problem is your back light is busted you can replace that and when the indicator not lights the problem is your power supply you can fix it by finding defective parts by using multimeter usually the trouble that i encounter to power supply is open/change value of resistor leak capacitor and shorted diode and transistor such as regulator you're always welcome

Mar 05, 2011 | Sharp Aquos LC-20B2U 20 in. LCD Television

1 Answer

Power on TV went out and it will come back on.


Check for busted fuse inside your TV, so you can switch it back on. So, open it up. Follow the power cord going inside your TV. The fuse is just near to it. Have it replaced, and have it carefully clean free from dust using 1/2 inch paint brush. Put the case back close, and plug it back to your outlet. Switch it on. Hope this
help you, and thank you for casting your vote.



Sep 22, 2009 | Sharp Aquos LC-20B2U 20 in. LCD Television

1 Answer

MY POWER KEEP GOING OF SHARP lc-20b2ua


I have the same problem. I fixed it for about 3 months by wrapping duct tape around the large pack midway in the cord (where the wall plug and TV line plug in). But, it started up again this week. I can't get the "box" open either, but that is where the problem is. Mine is mounted to the wall, so no one ever touches the cord. I'll let you know what we find when we get it opened.

Jun 29, 2009 | Sharp Aquos LC-20B2U 20 in. LCD Television

2 Answers

Can't find 2A 125v fuse replacement for on-off will 250v be OK?


There is no difference between a 125v and 250v fuse. The most important thing is the 2Amp. This fuse is probably the line fuse and could be the only trouble and may have blow with a line surge. Make sure the 2A you use is a Fast Blow Type. If it does blow again you most likely have a internal power supply failure.

Apr 19, 2009 | Sharp Aquos LC-20B2U 20 in. LCD Television

1 Answer

Does not turn on. ac adapter is ok.


I've been there I think.... You probably blown a 2 amp fuse inside on the DUNTKB128DE03 board. You are having a power issue inside and may need to replace the board. Check the fuse first.

Dec 24, 2008 | Sharp Aquos LC-20B2U 20 in. LCD Television

1 Answer

Auto Tuning Channels on LC20B2MA Aquos TV


 Automatically tunes in and preset
receivable TV stations.
Make sure the antenna cable is
properly connected.
1 Press MENU (PRESET-1) on the
upper part of the LCD TV set for
more than two seconds. The
AUTO mode screen appears.
2 Press VOL (–)/(+) (PRESET-2)
on the upper part of the LCD TV
set.
All the TV stations in your area
that can be received by the LCD
TV set are automatically preset.
3 The screen shows whatever is on
channel 1 when full auto channel
preset is finished.

Aug 07, 2008 | Sharp Aquos LC-20B2U 20 in. LCD Television

1 Answer

Component connection does not support progressive scan DVD


No can do the set cant deal with that signal. turn off prgressive scan on the DVD the signal is still a preaty good one. Only blue ray or HD DVD will get the real HD.

Jul 10, 2008 | Sharp Aquos LC-20B2U 20 in. LCD Television

1 Answer

Fuse F3701 is blow-up after few munites turns on. If replace a fuse F3701 again, it work, but the set turns of any time, check the set: Fuse F3701 is blow again?


Look at the power board " the one with the fuse" for capacitors that look puffed at the top or leaking at the bottom. If these are leaky the voltage drop will cause the current to rise and pop the fuse. After a time the caps will get bad enough that the set will stop working and may cause more problems.

Apr 16, 2008 | Sharp Aquos LC-20B2U 20 in. LCD Television

Not finding what you are looking for?
Sharp Aquos LC-20B2U 20 in. LCD Television Logo

Related Topics:

281 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sharp Flat Panel Televisions Experts

The Knight
The Knight

Level 3 Expert

68223 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

Dave Naylor
Dave Naylor

Level 3 Expert

834 Answers

Are you a Sharp Flat Panel Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...