Question about Mitsubishi WS-65809 65" Rear Projection Television

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What is the very best solder to use on the circuit boards?

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60-40 ratio solder is best for soldering parts in circuit board as it has inbuilt flux for shiny solder joint.
Available in Amazon
Click above link to get price info.
Thanks.


Posted on Nov 17, 2009

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Posted on Jan 02, 2017

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Raccordement fil d'antenne sur circuit il est coupe et je ne sais ou le souder


Step 1:
google translated


antenna wire connection on the circuit is cut and I do not know where the weld

antenna wire connection on the circuit is cut and I do not know where the weld

you might need to solder it
You attach wires to printed circuit boards (PCB) in a process called soldering. You heat the wire and PCB pad, melting the solder wire and allowing it to flow onto the wire and pad. The solder wire used is typically a lead-tin alloy although in some special cases, silver is used. Soldering a wire to a printed circuit board may be part of making, repairing or modifying the board or connecting it to another device.

Clean the pad on the circuit board where the wire will be attached. Gently rub the eraser on the pad until it is clean and shiny. Strip about 1/4 inch of insulation from the wire. Tin the end of the soldering iron by melting a small amount of solder onto the iron tip. Heat the wire end with the soldering iron for a few seconds and briefly touch the solder wire to the bare wire, just long enough to melt the solder, and let it flow into the stranded wires. This is called tinning the wire. Tinning the wire is not necessary with solid or single strand wire. Insert the wire end through the hole in the circuit board pad from the top or component side of the board. Bend the end of the wire slightly to prevent the wire from falling out while soldering but do not let the wire end touch any other component lead or another pad on the circuit board. Apply the soldering iron tip to the wire end and solder pad at the same for a few seconds until the solder used to tin the wire end melts. Apply just enough new solder to make a dome-shaped puddle on the pad that covers the hole and the wire. Remove the iron from the pad but do not move the board for a minute. Cool the new soldered joint and do not move the board until the solder hardens. Clip the wire end off with the wire cutters. The wire is permanently attached to the printed circuit board.

Soldering Guide http://www.kpsec.freeuk.com/solder.htm b> b> b> How to Solder to a Circuit Board: Skill Set (with Video)
http://www.popularmechanics.com/cars/news/4213423

Mar 14, 2013 | Computers & Internet

1 Answer

Rca model r52wh74


You need to re-solder the circuit board that contains the STK convergence modules. They're on the center circuit board attached to an aluminum heat sink that's about 8" long and 6" tall, about dead center in the circuit board. You may be able to recreate the problem (hour glass effect) by gently moving the heat sink (which the modules are connected to). This gives the hour glass effect on the picture and the advanced convergence screen. This is an indication that the modules pins aren't solidly connected (meaning soldered) properly. Remove the circuit board and clean the old solder off & resolder the modules pins to the circuit board reconnected the board and then retest by again pushing on the heat sink. This is a caused by a minimum effort (a.k.a. minimum cost) solder job, probably done in some 3rd world sweat shop. The "factory" job was good enough for 3-4 years but the heat (and these modules do create a lot of heat) and stress created from repeated use eventually takes it's toll, weakens the pin connections and our problem occurs. take the appropriate cautions working around the high voltage of the set & use a non-conduting piece of wood to push the heat sink when we doing tests. Best of luck, hope ya fix it.

Jan 04, 2008 | RCA HD52W56 52" Rear Projection HDTV

1 Answer

How do I replace the race slot on my amp do I need to take out the whole board and get it from the other side and is ther any soldering involved


Removal I can help with. Finding the RCA jack is a little tougher. This part is on you.

Does the circuit board remove from that back plate, where the RCA jack pokes through?
It would be nice to get it out of the way.

The RCA jack does unsolder from the bottom of the circuit board.

Suggest;
1) Use a low Wattage soldering iron. Put a soldering GUN aside.
TOO much heat.
20 Watt soldering iron.

2) Soldering stand, or at least a damp sponge nearby to constantly clean the soldering iron tip.
The soldering iron tip NEEDS to be well tinned, and clean.

3) No.2 chisel tip. It will make your life SO much easier.

[Soldering tip is taken down to the bare copper. Then heat soldering iron. Do not leave plugged in too long. Use Rosin core solder, and I would recommend .030 in size.

Soldering iron tip hot, touch the rosin core solder, and give a light coat of solder. -> Tinning ]

Removing that RCA jack to me, is just like removing a DC Power Jack, from a laptop motherboard.

First thing you want to do, is remove as much solder as possible, from each solder joint, on the bottom of the circuit board.
I use Desoldering Braid. (Solder Wick)

http://www.radioshack.com/product/index.jsp?productId=12580047&filterName=Type&filterValue=Desoldering

Unroll the wick about 6 inches.
Lay about 1/2 inch of wick across the solder joint. (Solder connection on bottom of circuit board)

Put the soldering iron tip on Top of the wick, and on top of the solder joint.
When the wick starts to absorb the melted solder, remove the wick.
Cut off the solder soaked wick part, so you will have a new wick surface to operate with.

Keep going around the solder joint, until most of the solder joint is removed. You will NOT remove all solder. You are JUST trying to remove the majority.

Perform for all solder joints (Connections) on the bottom of the circuit board, for those RCA jack leads.

GO SLOW.
Remove solder from one lead -> STOP
Allow the circuit board to cool down.
Then continue on.

Circuit board on it's side on the workbench, hold the insulated part of the RCA jack with one hand.

You want to rest your hand on part of the circuit board, (If possible), and use the heel of your hand as a fulcrum.
Fingers constantly applying pressure to the jack, pulling jack away from circuit board.

Heat one of the solder connections up on the bottom of the circuit board. Applying pressure with your fingers, see if this one lead will start to come out of the circuit board.

STOP

It will only come out so far, as the other leads of the RCA jack are still holding it in.
The method is to heat one solder connection, try to pull the lead out of the circuit board a little, then go to the nearest lead; and heat it up.
(Heat it up = Melt the solder)

Keep pulling the leads out a little at a time, and going from lead to lead, until they all come out of the circuit board.

NOTE*
What look to be very flat thin copper wires, on the bottom of the circuit board, are actually Circuit Traces. Also known as Signal Traces.

IF, you heat the solder joint (Connection), too long, you stand the chance of ruining the circuit board. This = No.

You can lift the circuit trace right off of the motherboard, using too much heat.
You can burn the circuit trace 'hole', and this will make it so it will NOT accept solder again. (You can't tin it )

GO SLOW. You have as MUCH time as you need.

Suggest melt one solder joint a little, pull on on it's lead, then allow the circuit board to cool down some.
Then go to the nearest lead, heat it's solder joint, pull up; then let the circuit board cool all the way down.

You get the picture

[Leads are the 'stiff wires' coming down from the RCA jack.
Circuit trace 'hole', is the hole where the lead goes through in the circuit board ]

When the damaged RCA jack is removed:

There will be residue left behind on the circuit board 'hole'. This needs to be properly cleaned.
I use Isopropyl Alcohol, and an old toothbrush.

CAUTION!
Isopropyl alcohol is EXTREMELY FLAMMABLE!
Use in a WELL ventilated area with NO sparks or flames present.

Yeah, I know. A disclaimer. I just want to make sure you do not get hurt.

Means circuit board well away from the hot soldering iron, when cleaning.

Info that may help,

http://www.laptoprepair101.com/laptop/2007/12/06/dc-power-jack-repair-guide/

There may also be a thin coat of solder over the circuit trace holes, left behind.
DO NOT worry about it/them. Leave alone.

When you go to install the new RCA jack, you will cut the leads until they are about 1 inch long, if not already that length.
Bend the leads so you can try a trial fit, and make sure each lead is going towards it's circuit trace hole.

Leads of the RCA jack pushing against (Lightly), the circuit trace hole, and the thin solder 'skin'.
When you heat the circuit trace hole from the bottom of the circuit board, the solder 'skin' will instantly melt, and allow the RCA jack lead to poke through.

Don't know if you used to solder back in the day, but solder has changed now. It is 'green', and no longer contains lead.
Makes it a @$#@^ if you are soldering with it the first time.
Suggest practice on soldering wires together, and perhaps an old circuit board.

The solder joints you make MUST be clean and bright. They should look like a 'Hershey's Kiss' when properly done.

IF, you make a bad solder joint, it is a Cold Solder Joint.
This = No.
You'll be pulling your hair out trying to figure out what is wrong, when it is just a cold solder joint.

You may wish to also view some soldering tutorials on Youtube,

http://www.youtube.com/watch?v=fYz5nIHH0iY

Check the - Related videos on the right also.

For additional questions please post in a Comment.

[Even though you can see I'm pretty 'Windy', I feel like I have left something out ]

Regards,
joecoolvette

Nov 11, 2012 | Computers & Internet

1 Answer

Ive used the picture control to get the redness out but its still really red what can i do


Check the video output section circuit board for any loose solder joints. This board can be located at the neck of the picture tube, plugged directly to it at its back. It is best to re-solder all the suspected solder joint there, by applying little more solder, without making any solder bridge short in between adjacent solder terminals, as it will be very difficult to locate loose solder terminals, as they might be microscopically small.

Jul 20, 2012 | Sylvania CD202SL8 TV

1 Answer

I have a crate GFX 50 and the effects come in only after about 15 minutes of play.


This is a warm up issue and can probably best be found by using circuit cooler on suspected components.

Other possible problems may be a bad solder joint or cracked circuit board.

Candle the board with a bright light to look for cracks.

Bad solder joints take experience to spot, but pay particular attention where panel mounted volume controls solder to the circuit board. Looking for the little ring around the solder menicus takes a sharp eye and good lighting. Resolder any suspected bad joints.

Jul 29, 2010 | Crate FlexWave FW15 Guitar Amp Combo, 15...

2 Answers

My DX302 dishwasher wont heat the water, the heating element is ok.


Hi,
Yes I had the same problem with the DX302. One of the solder joints on the relay was cracked but hardly visable. Resoldered it and no problems.
How to do it:
Make sure you turn off the power at the wall and pull out the plug. To get to the circuit board remove the screws on the inside top of the door and pull out the front panel (where the buttons are). Press the little clips and the white box containing the circuit board comes free. Remove all the plugs and lever open the small clips holding the box shut. After you open the box pull the circuit board up and have a look at the contacts under the black little box (relay). Use a soldering iron and some flux cored solder and redo the joints. Put it all back together and turn on to see how it goes.
Worked for me.
All the best......

Jun 22, 2009 | Electrolux 24 in. EDW5505EPS Stainless...

1 Answer

The negative battery connection came loose from the circuit board


radio shack sells a cheap entry level soldering kit
and there are videos on line on how-to solder..check you tube

Dec 31, 2008 | Pioneer VSX-D509S Receiver

1 Answer

56" jvc projection


You need to re-solder the circuit board that contains the STK convergence modules. They're on the center circuit board attached to an aluminum heat sink that's about 8" long and 6" tall, about dead center in the circuit board. You may be able to recreate the problem (hour glass effect) by gently moving the heat sink (which the modules are connected to). This gives the hour glass effect on the picture and the advanced convergence screen. This is an indication that the modules pins aren't solidly connected (meaning soldered) properly. Remove the circuit board and clean the old solder off & resolder the modules pins to the circuit board reconnected the board and then retest by again pushing on the heat sink. This is a caused by a minimum effort (a.k.a. minimum cost) solder job, probably done in some 3rd world sweat shop. The "factory" job was good enough for 3-4 years but the heat (and these modules do create a lot of heat) and stress created from repeated use eventually takes it's toll, weakens the pin connections and our problem occurs. take the appropriate cautions working around the high voltage of the set & use a non-conduting piece of wood to push the heat sink when we doing tests. Best of luck, hope ya fix it.

Jan 31, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Red Converge


You need to re-solder the circuit board that contains the STK convergence modules. They're on the center circuit board attached to an aluminum heat sink that's about 8" long and 6" tall, about dead center in the circuit board. You may be able to recreate the problem by gently moving the heat sink (which the modules are connected to). This is an indication that the modules pins aren't solidly connected (meaning soldered) properly. Remove the circuit board and clean the old solder off & resolder the modules pins to the circuit board reconnected the board and then retest by again pushing on the heat sink. This is a caused by a minimum effort (a.k.a. minimum cost) solder job, probably done in some 3rd world sweat shop. The "factory" job was good enough for 3-4 years but the heat (and these modules do create a lot of heat) and stress created from repeated use eventually takes it's toll, weakens the pin connections and our problem occurs. take the appropriate cautions working around the high voltage of the set & use a non-conduting piece of wood to push the heat sink when we doing tests.
Best of luck, hope ya fix it.

Jan 18, 2008 | Panasonic PT-53WX54 53" Rear Projection...

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