Question about Sony KV-36FS17 36" TV

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Un soldering hi, i'm trying to remove a tuner from a circuit board but all of the leads are soldered on . how do i lossen the solder on all the leads so that i can pull the tuner out of the circuit board. thank

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You need something called "solder wick." It's a braided copper strip that soaks up the solder as it melts. (You put the braid on the joint and then heat the braid and joint together.) I think Radio Shack sells it in small rolls. It's also available online from companies that sell electronic parts and service supplies.

You can also try using a vacuum solder ******. That has a plunger that pops out when you press the release button, and it pulls the molten solder away from the joint. I personally don't like those; I find the wick is much more effective, and it's possible to damage the board with the mechanical ******.


Posted on Nov 23, 2008

  • Nov 23, 2008

    Hmmm. I forgot that some words get bleeped. I should have said vacuum solder puller, but I guess the meaning was clear. "Vacuum solder opposite-of-blower." "Vacuum solder $uck3r" maybe. Thanks for the good rating.

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2 Answers

My tv all of a sudden has horizontal lines across the picture.


You have bad grounds on your vertical IC. And you have a bad capacitor or two. I don't recall the actual location of the vertical IC location. I would say it may be U4501 location. Resolder the seven pins of this IC. Now check capacitor locations C4505 which is a 35 volt 220 Mf value, and C4506 which is a 63 volt 330 Mf value.Replace these caps as necessary. Then check the solder grounds at the power supply chip U4101, this chip is a switch mode regulator and may become detached from the board. Resolder these 11 pins and be careful not to short the pins with too much solder. Please note the two pins on the right (separated by a missing pin) are soldered together, this is OK. Now for the biggest challenge. You must pull the bottom shield off the tuner (has the RF connection). Yes, this area can produce the horizontal lines you speak of. When removed, you will see about 15 bad solder connections. This area will require great skill to resolder. The solder on the perimeter of this tuner is very difficult to work with, and you do not want to burn off any traces connecting to out side feeds. You could destroy this board. Now inside the tuner area there will be 5 pins or grounds that will need resoldered. Be careful here and not to burn off the small traces leading to other connections. Replace the tuner shield after complete inspection and soldering. In some cases the eeprom, locationU3201, will need replaced. Might not in your case as you say you can still watch TV and the audio is good. I know this is a lot of information, but this TV can be saved. I have repaired many of these. Thanks for asking and show a few hands of support.

Mar 27, 2011 | GE 31GT660 TV

2 Answers

The tv has a black screen with a white horizontal line accros the screen. From where you connect you coax cable, I used to have to wiggle the cable to get video, i currently have audio but only the while...


Hi,
Your problem is not in the tuner. Since you have a sound but horizontal line only and when you bump the unit the video comes out, this is only indicated that you have a dry joints in the vertical section. Re-soldering the cold solder on that area will cure the problem. Dry joints is hard to spot so you need to work with a good source of light. Vertical IC is located near the FBT and secured with the heat sink.
Hope it may help you.
Have a nice day.
Thanks for using fixya.
JDVillanueva

Jan 31, 2011 | JVC AV-27950 27" TV

1 Answer

Channels 2 through 50 no longer come in...51 to 78 ok


sounds like you have one of the generic RCA/GE clunkers. well these all have tuner problems because of the "elastic-plastic" solder. and the fact that the tuner circuit is actually built on the main p.c. board. the flexing from the heat and the famous TIWAN junky cheap assembly process has broken the grounds. you will need to resolder the ground connections inside the tuner. this requires removing the bottom shield first. Also you must use a silver solder alloy. not your average electronic solder. hopefully the eprom or tuner i.c. didn't fail. but if this set was never soldered before it needs it now. good luck!

Jan 05, 2010 | Standard (CRT) Televisions

1 Answer

My 32" Sanyo HDTV from Walmart has problems with the picture and sound blinking off. You must push on TV to get the picture and sound to blink back on. Sometime it stays and sometimes it goes right off...


Sounds like you have bad solders in or around your tuner ***`y .Try knocking on the cable input while it`s working, this might confirm bad solder or cable connector. In case of bad solders you can take the cover off, the tuner will be right at the end of that connector and mounted on the circuit board . The bad solders are often on the p.c board itself . If you feel handy with a soldering iron you can resolder the tuner on the board, otherwise you might need the help from a local repairman. In any case you will know what is going on
Hope this will help Good luck

Dec 01, 2009 | Standard (CRT) Televisions

1 Answer

Cable female adaptor is missing


The small metal box is the tuner. The tuner has to be removed to replace the broken off RF connector. The connector has to be soldered to the tuner housing (metal box) and the leg of the connector has to be soldered to the circuit board, board has to be checked for cracks or if it is broken. If board is damaged the tuner will have to be replaced, if its available.

Aug 17, 2009 | Emerson EWF2703 27" TV

1 Answer

Hello the connector on back of my tv came loose how can i diy


You need to remove the tuner from the main circuit board, resolder the cable connector to the metal tuner case, and resolder the connection inside the tuner from the connector center tab to the tuner circuit board.

Removing the tuner requires "solder wick," a copper braid that soaks up the solder as it melts so it can be freed from the board.

Resoldering the connector to the tuner case requires high heat from a soldering gun to get it hot enough fast enough to make the connection. A regular soldering iron won't do the trick.

If the connector has been broken off completely, replacements are available from a couple of on-line vendors (I use a company call MCM Electronics www.mcminone.com.)

If you are not comfortable with electronic soldering and working on TV's, you might want to get an estimate from a shop for this repair. It should be under $100, depending on the shop's rate.

Dec 09, 2008 | RCA F27450 27" TV

1 Answer

Tv 19¨


It sounds to me like you have a ( cold solder joint ) ( the lead solder has broken from the board ) on your tuner in your set. You may need to resolder the lead connections from the tuner on the board. If this doesn't correct the problem, you may find a cold solder joint on the ground connections inside the tuner.
Good Luck and I hope this will help.
Ed
NC Electronic
Mills, Wyoming

Jan 24, 2008 | Standard (CRT) Televisions

1 Answer

TV problem


Bad solder connect inside tuner = un- solder tuner from
PC board and solder bad connect or replace tuner with new..
I.F. block next to tuner should be soldered,also.......T.

Dec 08, 2007 | Sony KV-13TR28 13" TV

1 Answer

Broken anteana screw post


John, the rf connector is not replaceable, have to replace tuner, this involves removing the main board, unsoldering old tuner and replace with new tuner and solder it in. Not rocket scientry if you have the equipment and a working knowledge of how to un-solder & re-solder in the part. You didn`t give make & model number so can`t give you price or part number, if you decide you can do this repair, send me make& model number & I`ll look up part number for you, BMW Rider

Dec 08, 2007 | Standard (CRT) Televisions

1 Answer

Coaxial outlet broke off


I assume that you pulled the F connector out of the back of the TV. In most Sharps, the F connector is attached directly to the tuner, which is the rectangular silver metal box soldered to the main PC board. Did you buy a replacement F connector or the entire tuner? Either way, the tuner must be unsoldered from the main board and the new F connector is soldered into the old tuner or the new tuner is soldered in its place. If you do not have experience soldering PC boards then let a qualified tech handle it for you.

Jul 02, 2007 | Sharp 25R-S100 25" TV

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