It started with a line across screen so i pulled it a part and soder the vert chip now when i plug it in you can here that it wants too turn on but dosent will the tv not come on if the vert chip is no good if i put too much heat on the chip could this cause the set not to too turn on so if i pulled the vert chip out of the set should it still come on or not ?i have not tryed yet
An expert who has achieved level 2 by getting 100 points
An expert who has answered 20 questions.
An expert that has over 10 points.
An expert whose answer got voted for 2 times.
Re: need info wont turn on
The set will not operate with out proper vertical signal/deflection. you may have bridged pins together when resoldering. use a 25w or 35w soldering iron so as not to lift copper traces from pc board. always use solder wick to remove old solder and DO NOT keep on pad to long. mch
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
You definitely have bad solder grounds. I have repaired a few of these. You will need a TV tech pull the boards out and resolder them. The worst board would be the one on the left [signal board, has rca jacks. rf connector]. And they may as well solder the second board. You will have a restored TV when completed. Thanks for asking and show a few hands of support!
sounds like a vertical problem, usually you'll see one white line across the screen, but one I worked on would come on and the bottom half of the picture was gone and there were lines across the top of the screen.
If you know how to solder & can find the vertical output chip then you could try resoldering the pins. If this doesn't fix it then it needs new parts.
you have a vertical output problem,take something insulated and prod around board and see if pix starts to flutter,then you could have a "cold-solder" joint,otherwise its more than likely a capacitor between the vert driver circuit and the vert output circuitry,
yes you got vert foldover best bet buy a new tv . you can fix it but if you replace the vert anp and the assorted caps and IF you still have a problem in the power supply in a really short time (1-2 hours) you will burn out the amp again , and blow 2 caps and a zener diode all over a regulator problem that showes it self when ever it wants too .... out 35.00 in parts and 2.5 hours labor right back where i started ....trust me you dont want to open this can of worms . if you have it done except to pay between 100.00 -200,00 for the repair and ask them to run the set for a day or so before you pick it up
You are correct about having a dry or leaky capacitor that is causing those lines to show on the top of the screen.
Check the caps with low capacitance like 1uf, 10uf, 47uf, etc.
No quicker fix for this one until you change the capacitors.
Hope this helps.
Timm,What you have Is Vert Failure,Toshiba is Noted for Bad Conns On the Vert Ic,Pull the Back off and Gently tap with a NonConductive Inturment and watch the Sceen Look for Heatsinks and Tap on those,If you know,or you caqn solder do so ,Do run the tv for a long time with no Vert or it will Cause BURN IN in the Phophurus
If you are getting static on screen you dont necessarily rule out the FBT, but if there is a fusible resistor by the FBT that is blowing it may be supplying current to the vert IC, the IC may be shorted internally or externally, check your connections and try replacing IC. Also check the pump up cap and if it is powered off the FBT the rectifier diode.
Since Intermitant always inspect the vert ckt for bad solder connections. If not replace the output IC they're cheap and most likely the problem If you still have lines on the top or bottom I would replace all of the electrolytic capacitors in the vert ckt also. Without much test equipment rebuilding the whole little ckt is the best way to go.
this set is known for cold solder connections on the vert output as well as the b+ supply line comming from the flyback xformer that supplys the voltage to the drivers. It could also be the vert output capacitor, The two waveshaper caps in the predriver stage of the vert, the filter cap off the flyback or the vert drive b+. Without going in and getting a schematic it will be hard to say. sets like that unfortantly these days are throwaways. NO NO NO dont throw the set at me I did mean that way!!! Its the cost factor of repairing getting the parts as well the the service diagram. it all adds up.
You have a vert sweep problem and unless you know how to trouble shoot this cuircit bring it to a pro. I found out mostly in these sets that the vert output IC is bad.. Also sometimes the b+ filter cap off the fly is leaky and made the IC to fail. Another thing is Im surprised to hear you got a pic with the vert failure and a bright line in the pic!! This could be a big problem when the sets fixed so dont run it too long like this. It could burn a line all the way across the screen and you will see a dark faint line in your pic because of this. BE CAREFULL!!