# ? on where to get a tv schematic

## Main Question or Discussion Point

I need to a scmatic on a tv where the best place to go for free.

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Mech_Engineer
Gold Member
You're going to have to be WAY more specific if you hope to get any useful feedback.

NascentOxygen
Staff Emeritus
I need to a scmatic on a tv where the best place to go for free.

Last edited by a moderator:
Integral
Staff Emeritus
Gold Member
Every model of TV will need a different schematic. If you are trying to fix a TV you will need a schematic for THAT TV. Good schematics are not generally available. Your local repair shops have to buy the repair manual for each model of TV, they are not cheap.

Ok i know electronics a little bit its a Polaroid i for got the model number i think its a 32 in i have it at vo tech right now i'm a second year in electronics at vo tech.

found it model is
TDA-03211C, LCD TV

Integral
Staff Emeritus
Gold Member
I have managed to fix a couple of flat panels with simple visual inspection. If you see any bulged caps, replace them.

got to caps i'm going to replace they were $2,86 a piece and somethings funky withe the the power transistor is seems to be shorted when testing it with a multimeter and one of the caps seems two be shorted and one of the caps is blown. berkeman Mentor Hi slee95. http://img811.imageshack.us/img811/5412/thgooglefriend1.gif [Broken] https://www.google.com.au/search?q=tv+schematic I kind of worry about the copyright status of some of the service schematics listed in that Google search, but I'm not going to dig into it much at the moment. I've always used the SAM's Photofacts repair packets for the TVs I've repaired. I don't remember how much they cost me (that was back 20 years ago or so), but it wasn't too bad IIRC: https://www.samswebsite.com/photofacts.html . Last edited by a moderator: Janus Staff Emeritus Science Advisor Gold Member Every model of TV will need a different schematic. If you are trying to fix a TV you will need a schematic for THAT TV. Good schematics are not generally available. Your local repair shops have to buy the repair manual for each model of TV, they are not cheap. Yeah. Gone are the days when they used to include a schematic along with the owner's manual.:grumpy: Averagesupernova Science Advisor Gold Member Yeah. Gone are the days when they used to include a schematic along with the owner's manual.:grumpy: Now I thought I was getting pretty old in comparison to how electronics has changed over the years but I don't think I've ever heard of a schematic coming with an owners manual. I have worked on TVs that had a block diagram inside the back cover even listing major semiconductors like the HOT and various ICs but never a full blown schematic. That was something I had to borrow or purchase. Janus Staff Emeritus Science Advisor Gold Member Now I thought I was getting pretty old in comparison to how electronics has changed over the years but I don't think I've ever heard of a schematic coming with an owners manual. I have worked on TVs that had a block diagram inside the back cover even listing major semiconductors like the HOT and various ICs but never a full blown schematic. That was something I had to borrow or purchase. When I got married (29 yrs ago) my wife had a SONY TV that she'd had for a couple of years. It came with a complete fold-out schematic for the set. I was able to repair the set from that schematic when it quit a few years later. (The initial failure was a blown resister, but because of the way the power supply was designed, this set off a cascade of other components to fail.) dlgoff Science Advisor Gold Member Now I thought I was getting pretty old in comparison to how electronics has changed over the years but I don't think I've ever heard of a schematic coming with an owners manual. I have worked on TVs that had a block diagram inside the back cover even listing major semiconductors like the HOT and various ICs but never a full blown schematic. That was something I had to borrow or purchase. The bold I added explains it. You're just young. Think tubes. That's for a crt tv isn't it? berkeman Mentor That's for a crt tv isn't it? Yes, but do you know what all those round components are...? Janus Staff Emeritus Science Advisor Gold Member Yes, but do you know what all those round components are...? Actually, I believe that it's an 0-scope. berkeman Mentor Actually, I believe that it's an 0-scope. Oopsies, good point. Guess I should do more than just skim.... :tongue2: There's a few different round ones on there which one do you mean? dlgoff Science Advisor Gold Member Yes, but do you know what all those round components are...? Actually, I believe that it's an 0-scope. Oopsies, good point. Guess I should do more than just skim.... :tongue2: Yes it's an Oscilloscope kit by Heathkit. I still have the one that I made and used years ago. If I had posted a Television schematic with those round components, it would have covered the screen. That would have been infraction worthy. Will i think i figured out whats wrong with the tv power supply a transistor went bad causing a few components to short like the two caps 1 cap blew and the other one seems fine but i might replace it because i have the caps :) This is the transistor i need file:///D:/FQPF9N50CF%20Fairchild%20Semiconductor%20%20Mouser.htm i don't want to buy online because its not as safe and takes a long time to receive the part. :( were can i by it in upper Pa? well that url sucked :( coppy and paste this Mouser Part #: 512-FQPF9N50CF Manufacturer Part #: FQPF9N50CF Manufacturer: Fairchild Semiconductor Description: MOSFET N-CH/500V/9A/ QFET C-Series Then go to google and paste it this is the transistor i need Pony up$20 and get the service manual.