Question about Sony KV-32S40 32" TV

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How to discharge tube

Or do i need too? i am trying to fix the sony kv32s40 32" tv solder problem
i have taken the cover off the back
thanks
paul2982@yahoo.com

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Discharging the tube by putting the screw driver to the anode cap. the driver is connected to the groud of the tube..in order to minimized the electric charge in the tube an for safety too..

Posted on Sep 03, 2008

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Sony Trinitron screen turned pink


Hello
Absence of green is the problem. You see mixing of red and blue, which will look like pink.
the fault must be of its video output card. This card can be located at the neck of the picture tube. Check this card, for any loose solder. This is a common problem seen in most CRt based Sony TVs.
Just resolder all the suspected solder points on this board, by applying a little more solder, without making any solder bridge short in between adjecent solder terminals.
images of two models of sony trinitorn TVs, [back cover opend] has been attached here. you can see the boar under suspection, along with the picture tube neck. [See the rectangulat printed circuit board attached to CRT base]3_9_2012_2_12_06_pm.jpg3_9_2012_2_12_38_pm.jpg

Mar 08, 2012 | Sony FD Trinitron WEGA KV-27FS120 27" TV

2 Answers

No picture but with sound


There are three things you should try. If you can safely pull the back cover out safely, do so. First thing to look for,is the suction cup attached to the picture tube securely? Be sure that it is. Make sure the TV is not plugged in, when you check for a good ground to the Tube (suction Cup). Then plug the TV in and power up. Still no pic? If you feel that this is not the problem, next, pull the board out of the TV. Be sure to discharge the picture tube before you remove the suction cup. Unplug the TV. A wire taped to a flat screwdriver, the other end of the wire connected to the silver braid that surrounds the picture tube. Now slip the screwdriver under the suction cup, you will hear a snap, you have discharged the tube, you may remove the suction cup. And you may pull the board completely out of the TV. Find the vertical IC and resolder the 7 or 9 pins. Do not use excess solder and short the pins together. Each pin must soldered individually and not together. Check for bad solder grounds on the horizontal transformer. This transformer is usually a small square box with five or six pins. When not soldered with a good ground, it will crate the problem you describe. Next, solder the pins on the Flyback Transformer. Resolder any and all power resistors. A power resistor is one of two watts or more. I do not believe your horizontal transistor is bad in this case, you resolder this as well. A bat transistor would hand you a dead TV. Do go over the rest of the board and really look close for any and all bad solder grounds, solder as necessary. Last be sure you have good solder grounds on the back of the small board that connects to the picture tube. I'm sure you will get your picture back, try all of the above and let me know how things go. Thanks for asking and show all hands of support!

Jun 23, 2011 | Sharp 27R-S50 27" TV

1 Answer

My tv dont turn on and theres a noise inside my tv


Hello
This is a typical fault symptom. Your TVs Line Output Transformer [otherwise called LOT], is shorted. To replace it you should open your TVs back cover. Locate the LOT . It is easy to find out since it is largest component inside. One of its thick wire will be connected to the final anode of the picture tube, at the top side, which will seem as it is sticked to the picture tube with a rubber boot.
The LOT along with that wire is compact, and can be get from electronic spare part shops.
To replace it, you should resolder it out from your TV after opening its back cover. Care must be taken when detaching the rubber boot side, because some storage voltage will be there even after switch off the set. It will retain there for hours. So you must discharge it before detaching it. Go for the same type and number. Sony's LOTs are typical types and you should insist on original.
Replace the horizontal output transistor, which drives the LOT, whcih can be located very near to the LOT , screwed into a metal heatsink. Replacing both at the same time is good.
Take precautions that we must, when working with an electrical equipment. Plug out the TV from wall socket and do the work. Ok

Oct 22, 2010 | Sony Standard (CRT) Televisions

1 Answer

Picture went completely fuzzy. What could the problem be?


The tv CRT( picture tube) have a radiaton posion infected in ur tv picture tube.This is how u discharge the CRT(picture tube) get the posion out.Take the tv back cover off.Take video board that connected to the CRT(picture tube) out.Plug it in,so u have a live current to the CRT(picture tube).Find a wire like an AV cable,should be find.One side of the metal,grounded to the metal frame somewhere.Take a long needle plier grab the other side of the AV cable wire,not the metal,(Caution high voltage live current).Come very close to the open CRT(picture tube).U will have a live current arc,than u,will hear a big "POP".U,just discharge the CRT(picture tube).The tv now the CRT(picture tube),now it good,it clear of posion infected in ur tv picture tube.Now,unplug ur tv.Put ur tv,back together.Hook up ur tv signal cable and plug in ur tv,now ur tv picture,will be clear,completely.I do this many times to dicharge fuzzy CRT(picture tube).When i was a tv Tech.for the SONY TV Corporation.

Oct 12, 2010 | Sanyo HT32546 TV

2 Answers

Tube tv where the screen is crushed into 2 inches


get a good magnifier and soldering iron
open thw back cover set unplug leave it discharge for a while and flip over the pc board and try to fin any cracked solder on the espescialy on the right side near the hig voltage transformer and near the power
supply and regulator you may find the bad one
hope that will help.//watch for not speel soldering betwen component pin .regards A S
good luck...

May 06, 2010 | Sony KV-36FS100 36" TV

1 Answer

Sony Trinitron KV-32FS320 4 blinks


First, understand the dangers of high voltage and charged capacitors inside a TV set! Discharge all capacitors and the picture tube in a safe way before proceeding.

What kind of IC is it?
If SurfaceMounteD:
1. Heat the IC pins and use a solder wick to remove ALL solder tin.
2. Use a sharp screwdriver or a knife to gently lift the IC from the PCB. Pay close attention if any of the pins is still attached to the PCB, if so, repeat step 1. Be careful, if you break the PCB, the Sony is ready for the dumpster...
3. Put the new IC in place, begin to solder pin 1, and then the pin most far away from pin 1.
4. Solder the rest of the pins, as quick as possible to not overheat the IC. Don't care if solder short circuit the pins.
5. Use a solder wick to remove all eventual short circuits that was the result of 4.
6. Inspect one more time to be 100% sure no short circuits remain.
7. finished.

If mounted through holes:
Same as above, with following additions:
1. a possible addition of a solder sucker.
4. The speed is still important, but since the pins are not so close, you should be able to do it without shorting.

Dec 31, 2007 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

No picture but great sound


Is very possible your picture tube is good,the problem might be a loose conection in the main board,the circuits to check will be the horizontal driver transformer,the output transformer and all overheated components in that area,another possible reason might be a loose conection in the crt board witch is in the neck of the picture tube,if you are familiar with tv service you can try to repair it yourself,you can start by removing the back cover and try to tap on different areas of the chassis to see if it reacts ,do this with a wooden or plastic handle(not metal)and be atentive where you tap when the set reacts so you can go back and check the solder conections,if you are not too familiar be safe and call for help from a servicer.Let Us know if you need more information.

Oct 27, 2006 | Sony KV-32S16 32" TV

4 Answers

Tv flashing


I could be wrong, but, from your description it looks like a cold solder, most probably in the Filament Heater circuit. If you are well versed in Solid State Electronics, I suggest you look for a loose solder or joint. Shut OFF the TV, Open the rear cover and chech for any dry dolder or loose coonections. Start with the CRT Neck PCB. Follow the tracks from the two Heater Pins (Marked H H) on the base). Also, gently remove the Neck PCB gently from the Picture tube, and (very carefully, mind you!) clean the Picture tube Contact Pins. Again, very slowly and gently, replace the PCB. Try your TV again. Let me know if the problem is solved. As for the second problem, ( less brightness) how old is your TV? Over time the emission from the Picture tube Electrodes becomes less, and picture quality detoriates. If set is over 6-7 yrs old, or if you are a heavy user - that is, you have your TV switched on for 6-8 hours a day, it is time to go for a trade-in. But, if you are very attached to the TV, you can always take it to a service shop, where they will re-condition the Picture Tube for a modest amount. It's life will get extended by a couple of years.

Sep 14, 2006 | Sony KV-35V35 TV

2 Answers

How to find pins for the EHT and FBT.


Franko, If your sure about troubleshooting HI VOLTAGE then disconnect the horizontal output transistor first. Is it shorted? if it is get the fly and the transistor. But I wouldnt start it up with out a variac transformer. For the parts, go to http://www.partstore.com amd see what the parts cost or get the tele # and call them. BE CAREFULL. Good Luck

Jun 30, 2006 | Sony KV-27S20 27" TV

3 Answers

TV Black-out


a tap on the side tells me that it's a solder connection broken loose, most likely in the horizontal section. if you have experience with electronic soldering, you can fix it, otherwise take it to somebody that can fix it. thermal expansion and contraction(from turning the set on and off) eventually produces metal fatigue in solder connections, and the connection breaks loose, just enough that it sometimes works, and sometimes doesn't.

Jun 28, 2006 | Sony KV-27S20 27" TV

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