Question about Mitsubishi WS-65809 65" Rear Projection Television

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I am replacing the capacitors on the board what is the best solder and flux to use?

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Use 60/40 rosen core. flux is already in the solder. Usa 15 to 20 watt gun. to much more could damage the board

Posted on Nov 18, 2009

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Tv whines and turns on and off. good picture everything works just makes the buzzing sound and turns off and on by itself. I think replace power supply. any input would be great thanks.


It is more than likely a capacitor or two on the power supply. I would replace the power supply or the capacitors on the PSU board if you are comfortable with a soldering iron, flux and desoldering braid/ vacuum pump.
When I replace the caps I always get a slightly higher voltage and ensure I get 105° rated caps. If possible find some low ripple capacitors. Typically if they are 16V 1000uf I will replace with 25V 1000uf 105°.

Dec 14, 2015 | Televison & Video

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Where is the power reset on panasonic PC-DF2703 triple play


Ralph!

There is indeed an internal fuse for this TV combo, inside - on the power supply board.

Trouble is, if it is blown it is usually indicative of a larger problem.

If you are somewhat "handy", unplug the unit and "crack 'er open" and have a gander at the innards. I doubt it is just the fuse (a replacement can likely be had at your local Radio Shack store), but more often the problem is a blown capacitor or two.

Sometimes (quite often, actually) a faulty capacitor can be diagnosed visually. They bulge, or the tops split open, or they discolor, leak, or simply smell like burnt chicken (really!)

A few screws and cables off, and the power supply board comes right out. A $1 replacement capacitor, a few minutes with a soldering gun, and you're "good to go"!

(sometimes, a couple of capacitors will blow at once. Some people spend $10 and replace all of them - which is a good idea since the board is out and easy to do

At the very least, look at the board and get the serial number off of it: replacement boards abound on Ebay for $25 to $50, and are easy to change out.

(the trick is knowing which model power supply board you need to purchase, if you go that route).

"Go for the Gusto" and try repairing the board yourself!

There are few satisfactions greater than doing it yoursel,f and saving the day along with saving a bundle of money!

The soldering gun, electrical solder (get self-fluxing solder, or purchase a small can of flux) and replacement capacitor will set you back all of well under $20 USD. How-to videos abound on YouTube on how to do this, if you have questions.

http://www.mcmelectronics.com/content/productimages/s4/SERVICEPARTS.JPG the capacitors are the black can-like thingies in the photo.

Please be sure to come back and post a comment on this same page, and let everyone know how you "FixYa" !!!

Aug 04, 2014 | Panasonic Televison & Video

1 Answer

Samsung LED TV UA40EH5000RXZN Mother Board


The usual procedure is to replace all the electrolytic capacitors first.
(Check if any are 'blown'). If that doesn't work, reflow the solder joints on SMD devices (obtain a tube of liquid flux to help) using a heat gun. You may have to use shields to keep plastics from melting.
Good Luck

May 31, 2014 | Samsung Computers & Internet

1 Answer

My tv will not turn on....there is power going to the tv but it will not turn on. The Vizio logo is on (yellow) but i can not get the television to turn on. What do I do?


I would suggest taking off the back panel to expose the circuit boards. The board that the power connector is on is your power distribution board. Look there for radial capacitors (if you don't know what they are google images is your friend). They should be flat topped. If you see any with bulging tops and brown liquid (electrolyte) seeping from the tops they are (at least part of) the problem. As a side note Radial Capacitors don't always give from the top, sometimes the will bulge and / or leak from the bottom and you'll have to look under them. Best thing to do is remove all the wires connecting to the Power board and inspect it very thoroughly (perhaps with the use of a magnifying glass). If you find any bad capacitors (also look under aluminum heatsinks (sometimes they hide them under those) you'll need to replace them, this isn't hard to do actually, watch some youtube videos if you have little/no experience with soldering on circuit boards. You will need a tool to remove the existing solder connection (I use a soldapullt) a decent (35watt or better) soldering iron, some flux (I like to use the flux pen) and some lead-free solder. Order the replacement capacitors (I use newark.com as they have an extremely wide selection) you will need the "uF" or microfarad and voltage spec off the capacitor and also pay close attention to the size of the bad capacitors and order the same size - if you don't it could present a problem with putting your tv back together.
If you found no bad caps, look on the power board for a glass or ceramic cylindrical fuse. Those can go bad as well.

Hope this helps.

Sep 01, 2011 | Vizio XVT473SV 47 in. LCD HDTV

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I have a video Panasonic AG-1980. Defect: When I am assisting a cassette and the key this TBC in off the image is normal and the color also. I slide the control soft-sharp and the silent image according to...


these decks are notorious for bad surface mount capacitors in the video and servo circuits. there will be quite a few that will need to be replaced. if you cant do it yourself, it will probably cost too much to repair. you will need access to an esr meter (pasive capacitor checker that checks the capacitor in circuit and the part does not have to be removed), a good soldering iron with a small tip, flux, thin solder, hemostats,solderwick blue and patients. the capacitors in question are the little round silver capacitors soldered directly to the boards. test all caps and locate caps with bad readings and mark them as bad but dont cover up the value marked on the top.the voltage is listed as a letter followed by the series of cap.(eg: 16 jhb would be a 16 mfd, j voltage rating, hb series cap) you can buy these caps cheap from digikey online. you need to be very careful when replacing the caps as if you do it wrong you will pull a trace and have to do major jumper wire work to replace the broken trace. the key to removing the bad cap is to grab them with the hemostats and squeeze, once the hemostats have a good grip of the cap start spinning the cap, dont pull just spin.you are trying to break the leads. once they break take your hot iron and wipe off what is left of the cap leads, let it cool and go back and remove remaining solder with the solderwick. clean the spot on board where cap was with anhydrous alcohol to clean any fluid that leaked out of the cap and made it bad. gently grab replacement cap with hemostats so you can hold it and apply flux to bottom of leads, place cap in its place watching polarity( black line on cap is negative and lines up with solid white side of silksceen on board or opposite the little plus on the board, if there is not a line on the cap or if there is a small "n" on the board it is a non polarized cap and direction does not matter)put a small(SMALL)amount of solder on your iron and touch it to the remaining exposed lead. if you fluxed enough and you used the correct amount of solder it should jump to the lead and leave a small shiny round solder joint. practice makes perfect and this will fix your problem. you may have to replace 40 to 50 caps maybe more, depends on how many are bad. good luck with your repair, 1980's were good decks!

Aug 20, 2011 | Panasonic AG-1980 S-VHS VCR

2 Answers

What would cause white moisture film on a power supply board? This is for a 51'' hitachi


Condensation could occur on any surface that was cold and then exposed to moist warm air but to create that inside a set?
If the white deposit isn't really moist, it may be the residue from a circuit board that was poorly cleaned. These are about 95% wave soldered on the underside and the solder has loads of flux floating on top of the solder to ensure a good flow of solder on leads and the board. The flux can produce a white deposit if it isn't thoroughly removed in a solvent bath. The component side of the board is mostly soldered via a 'reflow' method that reheats a tin/lead film on the component and the 'land' on which it is soldered. The amount of flux used in this process is quite small and rarely any flux survives even a lousy cleaning cycle. I've seen a bunch of circuit boards and have occasionally seen traces of flux irregularly present on them but never enough to appear like a consistent film.
If you have a film or deposit surrounding individual components, especially capacitors, this can be caused by the loss of electrolyte from a failing capacitor and is a sign of coming (or already developed) problems. Once this chemical (which does leave white deposits) has leaked, the capacitor is shot and needs replacement.

Mar 31, 2010 | Hitachi L32A403 31.51 in. HDTV LCD TV

1 Answer

Can I get replacement batteries for my Norelco 7735X shaver?


I have replaced batteries in several Norelco shavers, typically ending up with better end performance than with the original batteries.

Norelco shavers typically utilize two AA sized NiCad batteries with thin tabs spot welded on each end and the tabs soldered into the circuit board internally.

I have had best success with utilizing Sanyo Eneloop AA batteries, see http://www.google.com/products?q=Sanyo+Eneloop+AA+batteries&hl=en&scoring=p, which are NiMH cells with low self-discharge (i.e. hold their charge for over 6 months) and are free of the memory effects and internal self-shorting problems of NiCad cells.

The key to successfully changing the cells is to leave the original solder tabs on the circuit board and utilize the edge of a single edge razor blade (with great care) rocked back and forth between the metal tab and each of the ends (one at a time) of the original batteries so as to cut the spot weld free from the original batteries while saving the tab.

A single razor blade should do the job, though the blade will now be largely ruined for any further use.

Next carefully flatten the tabs (will be a little deformed by the spot weld break strategy).

Next carefully tin both the tabs and the ends of the new NiMH cells with a small amount of solder.

This tinning is not easy unless you use this strategy: Utilize small drops of "Harris Stay-Clean liquid" soldering flux, a clear (looks like water) zinc chloride liquid flux, e.g. dip a tooth pick into the flux and use just the small droplet of liquid flux which runs off the tooth pick onto the metal. After the flux is where you want the solder, touch a heated soldering iron tip already coated with a tiny amount of rosin core flux for electronic circuit joint soldering to the pre-fluxed area and the metal will easily and rapidly tin with solder.

For the new batteries, use only a tiny droplet of Stay-Clean flux right where you want the solder and touch the costed and heated soldering iron tip to the battery for just 1-2 seconds so as to minimize chances for any damage to the new batteries.

Once happy with the tinning of both the (saved) original batter tabs and the new batteries, hold the new battery in position and briefly touch the soldering iron against the tabs to push it into the battery end and fuse the two areas already tinned with solder.

I does take a little practice to get the above and physical alignments correct. It is helpful, though not mandatory, to use a temperature controlled soldering iron (e.g. set to about 500 F) with a fairly small tip.

Be sure to keep the Harris Stay-Clean flux, even fumes sealed in storage (I usually enclose the Stay-Clean bottle in a clear screw cap larger bottle) because just invisible fumes from this flux on any nearby iron or steel surfaces, over time, will promote rapid rusting. The Stay-Clean is a great product, just be careful with it during handling and storage.

Jan 04, 2010 | Norelco 7735X Electric Shaver

1 Answer

Samsung plasma does not power on but will click trying to come on


Check Capacitors on power supply board. I believe CM852 and CM853 are the two I replaced. They only cost a few dollars each and can be replaced with a cheap soldering iron and solder (flux core). The board cost around $150.

Dec 11, 2009 | LG 50PX5D 50 in. Plasma HDTV

1 Answer

Flux or no flux for new chips?


Yes, flux helps soldering joints and makes it shiny and proper joint.

Sep 12, 2009 | JVC AV-56WP74 56" Rear Projection...

2 Answers

My plasma tv power supply is knackered. Samsung PS42q96HDX


Not sure but mine is doing the same. and also about 18months old? did you get a solution to this?

Jun 17, 2009 | Samsung Televison & Video

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