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I have a problem with my PDP42x40000 it is with the power supply card the following components are damaged STR-F6467 capacitor 47u 35v resistor 0.22 ohm and when i changed this component i couldn't have a picture on the screen only the power led is on with red color and when i press on to have a picture it turns to blue color and go to red again i just wan to know what can i do to solve this problem this LG PDP42X40000 is on a SANYO plasma TV

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

Tech4lfe
  • 38 Answers

SOURCE: Westinghouse LTV-32w6 power light on, no video, no sound

One thing is to make sure the inverter board is unplugged when testing the voltages. A shorted inverter will shut down the power supply if the fuse dosen't blow first. There are fuses that don't look like fuses so they can be missed. The next thing would be to look for a connector from the main to power supply and see if there is a pin labeled power on or p.on or similar. The main board should turn this line high(5V) when you push the power button. If not you probably have a bad main board. Unless you can find good used boards they are both expensive. Around $200 for PS and $300 for main.

Posted on Jul 06, 2008

  • 1 Answer

SOURCE: plasma tv screen has green pixelating into pictures

I had the same problem and solved it with a factory reset. hold menu button dowm for 10 seconds and it will alow you to reset all the colors.

Posted on Jan 01, 2009

Matampong
  • 153 Answers

SOURCE: monitor fuse keeps blowing

There is definately a shorted component that causes the fuse to blow. Nomaly the ceremic capacitors are the cause of the problem. Check to see if there is visiual dark or burnt ceremic caps with label sameting like this "SCK 083" near the fuse area and change it. Hope it helps,cheers.

Posted on Jan 22, 2009

  • 534 Answers

SOURCE: Fujitsu Plasma Screen won't power up

This is most likely caused by the Main Power pcb.

See Fujitsu Service Bulletin on this problem in a similar model from Fujitsu. -see link below
http://tomtom2k5.free.fr/fujitsu/PDP-0035-06.pdf

A competent service technician should be able to implement the service bulletin.
A similar service bulletin is probably available for your model. Request bulletin from Fujitsu 'service@fujitsugeneral.com'

Posted on Jun 05, 2009

  • 13 Answers

SOURCE: magnavox 37MF321D/37 power light & screen flash, won't come on.

The capacitors in question are as follows. 2074 is a 2200uf 35v 105degree celsius. 2081 is a 1200uf 35v 105 degree celsius. I would recommend the smallest solder you can find, and use a 35 w solder pencil.

Posted on Sep 30, 2009

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2 Answers

Str x6750


Check all the other components, at related SMPS circuit, for any loose solder terminals. Check and replace damaged component/s at it main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis.

May 09, 2014 | Samsung CW29M64NS 29" TV

1 Answer

Sony TV has a power supply problem both ics irf1b7n50a in the power supply section are all shorting which number could I use as an equivalent. is there a way I could use a power modular with two power id's


Hi Saidi
Have you checked all the other components used in the main power supply regulator section circuit, before replacing a new STR? You should do it. There should be a reason for the failure to STR. You should find it, and rectify it, before replacing an other STR. Check all the small components, resistors, zener diodes, small value ceramic capacitors etc: Make sure all of it are OK. Especially give a keen attention to zener diodes used; if any. It will be best to replace these diodes, even if you do not find any fault with it with multimeter test.For more information go to http://electronicshelponline.blogspot.com/
Power supply schematics to some popular brand TVs are given. Pull up older posts. Good Luck.

Nov 26, 2013 | Televison & Video

1 Answer

32MD251D/37 will not power on



Zack Corpier

Workup for repair

02/22/2013

Diagnosis for Magnavox 32MD251D/37

Symptoms:

Will not power on

Once on, if turned off power might not return

Does not respond to power cycling

Possible Culprits:

Overloaded fuse

Damaged/fried power board

Damaged/fried inverter board

Damage to wiring or related

Overloaded capacitors on power board - I identified this based on a visual inspection and a multi meter test




https://lh6.googleusercontent.com/-Mcf67G5l3l8/USgitModWZI/AAAAAAAACRo/PwjueC45Hjo/w333-h319-o-k/caps.png


Problems Identified:

Capacitor 2079 appears overloaded - 1200uf 35v

Capacitor 2080 appears overloaded - 1200uf 35v

Explanation:

The capacitors referenced regulate the voltage controlling the power. These caps have a limited lifetime in hours which is usually around 3000. The device was left on for an extended period of time overloading these essential components.

Resolution:

1. I will order a set of replacement capacitors

2. Discharge board prior to work

3. Remove and replace damaged capacitors

Required Parts (total cost $30):

(2) Vented axial 1200uF 35v Capacitors - $8

Variable wattage soldering iron (minimum 35w) - $22


Feb 10, 2013 | Magnavox 32MD251D/37 Tabletop Pedestal...

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Sony 2185 mt dead


is k digram nhi hai sony 2165m

Dec 30, 2011 | Televison & Video

1 Answer

VOLTAGE DROP AFTER STR.MAIN FILTER NOT DISCHARGE AND FUSE GONE EVERY TIME. I CHANGE STR & SUPPLY IC.


connect a series lamp for sefty to the monitor. start to disconnect the component from fuse ,line filter, bridge rectifier, filter capacitor, check the voltage at ic 12v also check pulse at str if not then check ic resistors capacitors,and replace if found faulty

Mar 23, 2011 | Samsung SyncMaster 1100P 21" CRT Monitor

1 Answer

What is the first step in troubleshooting color television? dead set..blown fuse..


Hello
You haven't specified anything about your Sony Tv. No model number or anything to compare. Although I hereby giving you a general trouble shooting method, first adopted by technicians like me. You have stated that the fude has blown out. Fuse will not burn out without any reason. it is a protective device used in every telivisions,as if any internal components inside it gets shorted, especially in power supply section, the fuse will get burned and protect the other components from further distruction. Therefore you have to trace the reason for the failure of fuse first.
You must beging it from power supply regulator section itself. Chech the resistance accross the main filter capacitor first. Set the multimeter in Ohms range, and the resistance must be above 250Ohms in one direction, and upto infinite in the other direction. If both readings comes below 20Ohms or so, suspect the power regulator Ic; usually sony sets udes STR type regulated power supply, and this STR will get shorted. As you haven't specified your sets model, I can't make sure whether it is circuted with STR or a switching transistor. As both cases, this regulator has a chance to get shorted. Desolder it out and check for short. if it finds shorted, check the rlated components also, such as zener diodes and resistors, for open and short,as they also will get damaged due to this main switching transistor, or STR; whatever may be.
Check the degaussing posistor for short. Check the rectifier stack for short. Check the mains filter capacitor for short. Check each and every diode for short. you must measure the forward reisistance of diodes with multimeter set in 100KOhms range. There shouldn't be any slight leak with this test. If it shows a slight leak, replace it. You just do these and inform me the result through Fixya. I'm ready to assist you furthermore. When you reply to me; please include the model number of your Sony Tv. Ok.

Dec 12, 2010 | Sony Televison & Video

1 Answer

Dear Sir, I'm Bangladeshi Tv Techanician, Sony tv


Hello

Before replacing the STR, have you checked all the components related to it? When STR burns out some of the nearby components, such as zener diodes and other resistors will also get damaged. You just replace the components, especially, zener diodes, in case it does not show any fault, replace it. Connect a 100W filament type bulb in seris with the power supply, and switch on the set. This will reduce the power concumton at the begining, and we can check its heat effect also, after all are ok we can connect directly. Check the smoothing capacitor at the secondary 130VDC. Replace it also. If you need furthermore assistance, feel free to contact me through Fixya. I'm an Indian, residing at Trivandrum, the capital city of Kerala State.

Dec 11, 2010 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

In my tv fuse is blowing off immediately


Hello
If fuse blows off immediately, i means that there is a short circuit occured in your telivision. This can mainly due to some diodes or regulators inside your tv. An overvoltage, spikes, ie [sudden high rise and go low], in the supply votage in your home, could damage power supply regulator components inside your tv.
All Sony Tvs has high accuracy power regulating systems inside. It is an onboard assembly, usually take 1/4th of the area of the TV. In older Sony TVs, this section was built in with use of transistors of different types. But your tv is not so old, so its power supply system is built with an STR, an Ic meant only for power regulations. Normally it willb numbered STR S6707, STR S6703 etc; according th the working voltage of the main board, and screen size of the TV.
This STR may get shorted due to power fluctuations, or any other reasons. A I mentioned above this is an Ic look like small squuare biscut of about an inch in square, and will be black in colour.
The rectified main power supply is given to it via an SMPS transformer [Swiched Mode Transformer], and the Ic will swictch it on and off at the rate of sbout 25KHz or more, and this transformeres secondary voltage is used to power up the other part of the ciiruit board.
If the fuse is blowing as soon as the set is switched on, this Ic will be faulty [Shorted inside]. If you put an another fuse, it also will blow up due to short. It is not good to play with power supply system by doing this as it may harm to other components also.
You have done it I thinks. Here in India, we gets 220VAC as home power supply. Sony TVs used here have a fuse rateing of 250V 3.5Amps. If your household supply system voltage is also this you must put only this rated fuse. If it is 110 or 120VAC, the fuse rating may differ; and will go upto 6 to7 Amps. More than this rated fuse should not be used.
You just do one thing. Just open the back cover of the TV, locate the power regulator section, and chech whether any main rectifier diodes for leak. There may four of them. In some sony Tvs, rectifier stalks are used. Check it for leak. If thery are all good, measure the resistance across the main filter capacitor with a multimeter set in Ohms range. If the STR said above is short, the meter will give full scale deflection. Unsoder the STR and pick it out after loosing its fixing screws to the heat sink. Again check the resistance accross the main filter capacitor. It must sho a low deflection or no deflection at all. Never replace the STR with a new one as there may be some other faulty components in that section. Usually when STR fails, there are some Zener diodes, Wire wound resistor etc will also gets shrted. If you replce the STR before checking them for fault, the STR you puts in will get shorted as you swich on the set. It will take just 1/100 part of a second.
So check all the components related with power regulator system, and then only repace the regulator. Caution: Keep chlidren away from you while you open the tv. Never touch any part of the circuit board while power supply is there. Plug out from the wall socket each time you touch the printed circuit board. As your Tv screen size is 32", an approximate of 25KVDC [15,000VDC], will be present at the first anode of the picture tube while it is working. It is too dagerous to contact.
If you haven't through knoledge, skill and patience, never try to repair it. If you knows to follow its schematic digram, buy one book and follow the circuit.
Keep an adult beside you as you try to repair your set, as a precaution.
If you have any doubt, report to Fixya, they will give me alert. Ok

Oct 20, 2010 | Sony FD Trinitron WEGA KV-32FS120 32" TV

3 Answers

Magnavox 37MF321D/37 power light & screen flash, won't come on.


Hello,

A full capacitor kit for the 37MF337 and 37MF321 models is available here:

http://www.ccl-la.com/catalog/product_info.php?cPath=21_77&products_id=216

The kit contains all 8 capacitors needed to rebuild the power supply board

Aug 27, 2009 | Philips Magnavox 42MF521D/37 Television

1 Answer

Power on off switch not working


Do not operate the set anymore, before taking the following steps, or damage to the HOT, electrolytics or zener diodes may occur. - see if there are 2 small electrolytic capacitors in the primary part of the power supply, could be C909, C910, C911 or something. The values are usually 47u 25V and 10u 50V. Especially the 47u which is in the base drive of the switching transistor causes over-voltage conditions. They both should be replaced. - there should be a 2SC2335, BUV46, BUT56 or BUT11A in the +105V line on the secundary side of the power supply. This is probably shorted thus causing no power-off. Replace it along with the transistor driving it (2SA1013 probably). If the above does not apply to your TV, you're on your own for now, and you may actually be having a microcontroller faillure...

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