Question about Toymax Magnavox 37MF331D 37 in. LCD TV

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Need to get a schematic of the power board in a MAG 37MF231D part# 31381036294.3 for T/S purposes. New board just to expensive.

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  • Toymax Master
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Replace cap location 2074 which is 25 volt 2200Mf and cap location 2081 which is 35 volt 1200Mf. You can visually see these when you remove the back...Good Luck! PS...be sure they are rated at 105 degrees!!!!

Posted on Jan 13, 2010

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  • Joshua Wichers Sep 13, 2011

    Looking at the board from the opposite side of the through hole components, in the top left the diode and resistor burned up and I can't figure out what to replace them with. I have the cap replaced in 2074 but the resistor is x046 I can't make out the first number and the diode is I believe 6079. Cab you help me?

  • matt martin
    matt martin Sep 14, 2011

    I think the location of the resistor is 3049 which is a million ohms at 1/4 watt. The Diode number is PH C9V1. I would say, you may need to replace this power supply board altogether. Burned components is a major problem. Visit Union Electronics at 1 800 648 6657. Have your TV brand and model#, and ask for a power supply. Your old power supply may get you a core exchange as well. This is your best chance for repair!

  • Joshua Wichers Sep 14, 2011

    Thank you very much!

  • matt martin
    matt martin Sep 15, 2011

    You are most certainly welcomed!

  • Joshua Wichers Sep 15, 2011

    Is there a resistor at x046? I can't make out the first number maybe a 6046.

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Hi I have a magavox. TV model 37mf331d/37 I looked at the capacitor don't seemed to looked burned out could it still be that??? What is happening is the power light flashes and I see the screen flashen a light can someone please help me?? If easier u can text me 609-501-8993 my name is Don thanks

Posted on Apr 12, 2012

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Posted on Jan 02, 2017

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Magnavox_37mf231d replaced caps still does not work


Please take this steps on how to determine the problem:
1. Open the back cover.
2. Check the power supply output...It should have 5vdc for the main board..12vdc or 16vdc for the audio and 24vdc for the back-light inverter..
3. If those 3 voltage supplies have encountered voltage drop...The problem could be on power supply board..
4. If the power supply output is normal..The problem could be on the main board...
5. If the problem is power supply you should check if the capacitors are bulged on the top and try to replaced it..If you can't do that you can purchased new power supply board..
6. If the problem is on main board there is no D.I.Y repair on that so you need to buy a new main board that fits to your TV..
Hope this solution will be helpful..

Jun 13, 2012 | Toymax Magnavox 37MF231D 37 in. LCD TV

2 Answers

We have a Magnavox 37MF231D TV and it popped and now the screen won't turn on. No power at all.


Hi,
Popped sound was came from a blown electrolytic capacitor and most likely in the power supply board. This board has now gone to incomplete circuit(dead) that's why the led light is not lit. If your handy with electronics, you may troubleshoot this board and look for shorted capacitor, open fusible resistor, shorted voltage regulator IC, open fuse. If you can't troubleshoot it yourself, another option is to replace the entire power supply board for more convenient. No soldering required, just pull-out all the cables connected from the existing board and put in the new board.
Also, check if your unit is under warranty/extended warranty period, avail it because the manufacturer will fix it for free. Don't attempt to open the back cover because it will void the warranty.
Let me know if you need further assistance.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.
Jdvillanueva

Jun 13, 2011 | Toymax Magnavox 37MF231D 37 in. LCD TV

1 Answer

Powers on for about a second but nothing comes on, only a black screen but i can tell the backlight is on, then it powers right back off. i need the schematics, anyone know where to find them?


So you are getting gray glowing screen without the pictures? Sound OK?<br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><a href="http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide">http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide</a></span><br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"> </span><br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"><a href="http://s807.photobucket.com/home/budm/allalbums">http://s807.photobucket.com/home/budm/allalbums</a></span><br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"> </span><br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><a href="http://en.wikipedia.org/wiki/Capacitor_plague">http://en.wikipedia.org/wiki/Capacitor_plague</a></span><br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"> </span><br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt">Parts: <a href="http://www.shopjimmy.com/">www.shopjimmy.com</a></span><br /><span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA">Capacitors kit: <a href="http://lcdalternatives.auctivacommerce.com/Viewsonic-C196320.aspx"><span style="mso-spacerun: yes"> </span>http://lcdalternatives.auctivacommerce.com/Default.aspx</a> he can make you a set of caps.</span>

Aug 25, 2010 | Toymax Magnavox 37MF231D 37 in. LCD TV

1 Answer

Power board in magnavox 37MF231D blows fuse right away. Caps are good on board and fuse still goes when disconnected from TV.


Then you have a shorted regulator circuit. the best bet is to replace the power supply board itself. The part number is 313815864961. Please take a few moments to rate my answer, Thank you.

Nov 17, 2009 | Philips Magnavox 27MS343S 27" TV

1 Answer

Dead set


you can look at the capacitors on the power board if any of them have puffed up tops that is the ones. Also when you are looking at the power supply look under the heat sink at the top right they try to hide one.

Sep 06, 2009 | Philips Magnavox 50ML8105D 50" HDTV DLP TV

3 Answers

Need info on component 3071 on power supply board - burned up.


Its been a while since i worked on that power board. But I believe you are refering to the orange diode that runs into the single connector for the video board next to the power supply. I replaced mine with a 1n914 diode after replacing the 2200uf lytic cap and the tv fired right up.
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Jul 23, 2009 | Philips Televison & Video

1 Answer

T.V. has had problems turning on for a while, now wont turn on


you dont need to buy a new board they cost about 300-400 dollars--- they have refurbished boards around 100 -- look online at
partsstore.com

Jan 19, 2009 | Philips 37PF7320A 37 in. HD-Ready LCD...

2 Answers

Magnavox 37MF231D 37" LCD TV "popped" now won't turn on at all!


Capacitors tend to pop when they fail. Phillips LCD TVs have lots of problems with capacitor failures in their power supplies. I've got my 37mf231d apart on my workbench as we speak. Mine makes a whistling sound which I believe is either a solder fault or a bad capacitor.

A new power supply board is about $150 for that TV. The gamble, of course, is if the power supply took out something else when it failed.

Jan 16, 2009 | Philips 37MF231D 37 in. LCD Television

2 Answers

Mag Innovision LT982s 19 in


yes the power supply or capacitors are shot. the part u want is from proview technology inc
attn: parts dept.
7373 hunt ave
garden grove,CA 92841

it is the lcd power supply, P/N 860-ALZ-M713W-f
F0742683G
1-800-776-8439 follow prompts....ed

Jul 20, 2008 | Mag Innovision LT982s 19" Flat Panel LCD...

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