Question about RCA 20F512T 20" TV

3 Answers

TV will not power on

Took it apart and noticed fuse was blown. Replaced with good fuse. Blew the fuse. Then took another look at the rest of the circuit board and found that position RT801 model MZ73L 9Rm shows signs of electrical burns on the circuit board. Is there any way I can get this particular part and solder it in myself? Very familiar with electronics. Thanks

Posted by on

3 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers
Re: TV will not power on

How , i also took out this , thinking it has short circuited as the problem was exactly same . see what happens after chaging it

Posted on Mar 21, 2010

Re: TV will not power on

The MZ73L is a posistor, its basically 2 thermal resistors back to back. One is connected across the mains, the other one connects the deguassing loop to the mains. When the TV is 1st turned on the mains connected R is cold so its neighbour is cold, that allows a large surge of current into the degaussing coil. The mains connected one rapidly gets hot and heats up the other one, this increases the resistance of it and the current being dumped into the degauss coil fades away. As the 1st one is a heater it will get hot and you will see signs of heat on the PCB, BUT its still a very good place to start. The heat is normal, but if the 1st ceramic disk in it has died then you will short the mains and blow the fuse with it.

Posted on Apr 20, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 979 Answers
Re: TV will not power on

You will need to acquire the service and parts manual. This will guide you to the correct part number(s) you'll want to order. Any reputable parts dealer can help you in that aspect.
What usually causes these types of problems is a failure of the device itself or a "chain reaction" sort of event, causing the visibly defective part to smoke through no fault of it's own. Be sure to check for proper voltages before condemning the wrong area. Hope this helps...Accordianman

Posted on Nov 04, 2007

Add Your Answer

0 characters

Uploading: 0%


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


3 Points

Related Questions:

1 Answer

The television quit working during a storm and seemed to not be getting power. Took off the back and found the 5amp/125v fuse blown. Replaced it and it blew again as soon as I plugged it in

All telivisions are provided with fuses, and the function of fuse is to protect its internal circuit agains short circuit, and protect the other components in the TV. if fuse must blow, surely there must ba reason. Without rectify that reason, if you put the fuse and switch it again, it may poise to other more problems. So get it repaired with a qulaified service personal. Never put any more fuse in it and swich on the Tv. Ok.

Oct 18, 2010 | RCA Standard (CRT) Televisions

1 Answer

I have a Sanyo ds20424 the breaker in my house tripped and now the tv won't power on. It happened before and I took tv apart and got it to work again. Is there an internal reset switch? What could be the...

I don't think there is no reset switch inside the TV but may be FUSE blown deu to power intruption pls check the fuse and if it gone peplace the fuse with same rating

Aug 27, 2010 | Philips TP2784C TV

2 Answers

Blown up tv (philips)

There are fuses always inside TVs. The main filters (capacitors) are probably damaged and the regulators are probably blown. Chances are the rest of the set is OK. Sudden bursts like that usually kill the fuses very fast and the regulator takes the brunt of the load. With a multimeter, you could probably check regulators for shorts and replace fuses.

May 04, 2010 | Philips Magnavox 27MS343S 27" TV

2 Answers

Power light blinks - and now the TV won't come on

Most likely the power supply and/or related circuitry has failed.


Aug 23, 2009 | Philips Magnavox 27MS343S 27" TV

1 Answer

Keeps Blowing Fuse

You obviousely have a short somewhere. Take it to a repair place.

May 26, 2009 | Sony FD Trinitron WEGA KV-36HS500 36" TV

2 Answers

Problem with Sansui LCT37SD power supply unit

Diagram of SANSUI LCT37SD.
Power supply default.

Apr 22, 2009 | Standard (CRT) Televisions

1 Answer

Fuse constantly pops when turning on power

Check power supply transisters possible shorted
and check transister next to ht runs picture may be shorted also check diodes 4off runs ac to dc
changover , this possible causes the fuse to blow , allways be carefull when pluging any
electrical item in
please let me know how you go thanks jeff..........

Feb 16, 2009 | Sylvania 6427TE 27" TV

1 Answer

RCA TV blown fuse


you have bad Rectifier Diode or Ic regulator.. check first the unregulated power supply before you go to regulated power section! then check,.


Oct 23, 2008 | RCA F27242GY 27" TV

5 Answers

Fuse blown

the fuse will always blow if there is a shorted component. the horizontal output transistor may be the most likely culprit, if you are not a technician, have it service by a qualified one.

May 15, 2007 | Samsung TXR3079 TV

Not finding what you are looking for?
RCA 20F512T 20" TV Logo

766 people viewed this question

Ask a Question

Usually answered in minutes!

Top RCA Standard (CRT) Televisions Experts

The Knight
The Knight

Level 3 Expert

66623 Answers

John mullen

Level 2 Expert

229 Answers


Level 3 Expert

2963 Answers

Are you a RCA Standard (CRT) Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides