Question about Toshiba MW20FM1 20 in. Combo

1 Answer

Toshiba md 20f51 07/2005

Yes i have a problem with my tv it will not power up how do i check it if itis the power supply or diodes i checked the fuse andit is good i get 68 volts acrossed it is that normal? and can i get a schematic sincerely please help Patrick

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 4 Answers
Re: toshiba md 20f51 07/2005

Check out Toshiba Customer Support. They e-mailed me the instructions to reset the V-Chip.

Posted on Sep 14, 2008

Add Your Answer

0 characters

Uploading: 0%


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


3 Points

Related Questions:

1 Answer

Power light blinks red, tv will not turn on

I see so many here with no sound/nopicture issues:


1. IF sound main fuse/s are good.
2. If no power or standby check main fuse, standby power supply and any signsof damage you can see---burnt parts etc.
3. almost all these sets the troubleshooting involves checking voltages on the main power board to narrow down theproblem.
4. Be safe and if you do not know what you are doing don't open the set.

Answers to issues:

1. RE:fuses---if a blown fuse is found get a good replacement(not the genericones like Radio Shack). Many fuses are special even aside from amperage--Don'tput a higher rated amperage fuse in the set for any reason.

2. RE: power supply in set: if total dead aside from main fuse the set uses astandby power supply that runs 7/24 and a main supply (some are combined andsome not.

Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion--Iattach a photo of a good one---top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.

What happens in the standby area is they use caps with too low a voltage rating(saves money) which causes them to fail in a year or two---the standby runs7/24 and the heat dries out the caps and they fail.

3. Trouble shooting consists of the above and then at some point you have to buyand try a board to see if it fixes it or not.

4. Safety first--no TV set is worth getting injured or even killed over.If set is opened at least look for puffed up and bad caps like in thisphoto.6_12_2012_5_43_23_pm.jpg6_12_2012_5_43_42_pm.jpg

Jun 12, 2012 | Toshiba 23HLV84 23 in. TV/DVD Combo

1 Answer

Can't turn on/off using either switch on front or remote. was plugged into outlet on cable set-top box. perhaps something was fried by sudden power outage.

In that case if ther is no power you better check first the power in the outlet they have.Then check the continuity of AC cord of the TV.If they are good,check the fuse,located inside at the power supply section near the AC supply voltage input.Replace same value of fuse if busted.Then try to turn on again..Try this procedure,hope will it help you..Thanks..

Aug 26, 2011 | Toshiba MD20FN3 20 in. TV/DVD Combo

1 Answer

Emerson mod. ewc 1301 keep blowing fuse

There must be a direct short in its power regulator section. Normally a shorted switching output transistor at power regulator section will cause this fault. You have to check all the components in the power supply switching retulator section, including rectifier diodes, zener diodes, electrolytic capacitors, small signal switching transistors etc. In fact, you have to check the components in the entire power regulator system. Never put any more fuse into it as an experiment; this will make more components to get damaged. Check the sets' circuit well. OK.

Jul 27, 2011 | Emerson EWC1901 Combo

1 Answer

I have the Toshiba TV/DVD Combo less than 3 years old

check thje following
the power reaching your switch via a fuse and power out of the switch, when switched on.
if the power is leaving the switch okay then check the power supply components
semi conductors, for leaks and shoots, zener diodes, and capacitors for variations and change of values especially electrolitic capaciturs. if you get a high voltage of 85 and above going to the transistor near the transformer, then check your line trasistor.

Aug 18, 2009 | Toshiba MD20F51 20 in. TV/DVD Combo

1 Answer

Toshiba MW24F51 has no power

GO TO POWER SUPPLY SECTION, check out for fuses blown or any part that burnt, hopefully is the fuse , if not then need to replace the whole power supply unit. good luck , AJ

May 07, 2009 | Toshiba MW24F51 24 in. TV/VCR/DVD Combo

1 Answer

Ac power Symphonic sc309D blows fuse- Dc power ok

The most likely problem is a shorted diode, I suggest replacing them even if they do not test shorted while not under load. If it is not the diode rectifiers, there is probably a resister in the power supply that is shorted, remember also that it can also be both. Lastly, it can be a capacitor within the power supply.
I Wish You Well

Dec 03, 2008 | Symphonic SC309D 9 in. TV/VCR Combo

1 Answer

Reverse Polarity

Look at the 'wall wart' transformer case.
it should state the input voltage and frequency (110-115-120 - not important) and probably also 60Hz.

It should also have the output specs such as:

12VAC or 12VDC @ some amps or milliamps.

If it says the output is AC, then the TV might not be able to handle DC input although it wouldn't make sense if it couldn't; why supply with 12VAC if it was intended to be portable?

That the coax connector got hot is a baaad thing; that may mean that your boat is positive ground but that would be rare.
The shell of the antenna connector is certainly tied to the chassis and the negative side of any external input.

The input connector itself may be at fault if it is not the typical - shell / + center contact.

Just some things to check and yes, you may have damaged something inside but it could be only a fuse or a protective diode; either would be cheap to replace.

Aug 13, 2008 | Toshiba 14DLV75 14 in. TV/DVD Combo

1 Answer

Sharp TV won't turn on

if you dont have any experianc  dont try it on your own it will be better if you can find experts near your.the problem to your tv are power supply problem,there some transtors,fuse,diodes,check them,

Oct 30, 2007 | Combination Televisions

2 Answers

No picture, no aundio

most tv/vcr combo has only one power supply source which is located in the vcr unit. u have a power supply circuit problem. try to check the rectifier, filter capacitor and the regulator ic/transistor. good luck!

Feb 02, 2007 | Toshiba MV13L2 13 in. TV/VCR Combo

2 Answers

Toshiba MD20FP3 not turning on

Is a good thing the main fuse is not open,your problem is in the power supply ,as I understand you have no indication of power(no lights,No clicks)The 5 volts that power the microprocessor might be missing,this 5 volts usually come from a regulator,this regulator should have 12 volts in one side and the 5 volts in the other,the 12 volts come from the secondary of a transformer and it has its own fusible resistor,if the resistor is open is because the regulator is shorted and it need to be replaced.This is a good place to check.Be careful when checking this parts.If you are not too familiar with tv service seek the assistance of a servicer,it should not be too expensive.

Oct 03, 2006 | Toshiba MD20FP3 Combo

Not finding what you are looking for?
Toshiba MW20FM1 20 in. Combo Logo

Related Topics:

78 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toshiba Combination Televisions Experts

The Knight
The Knight

Level 3 Expert

66463 Answers

matt martin
matt martin

Level 3 Expert

1187 Answers

Jaime Hernandez

Level 3 Expert

2267 Answers

Are you a Toshiba Combination Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides