hi i am new here

[raylyd]

Hi i like fixing things i do it all the time.

Here a link to feedback on asslember fourms.

http://www.assemblergames.com/forums/showthread.php?t=27477&highlight=raylyd

I like all sega stuff.

I do like arcades but dont have the room in te house i am in.

I am a genuine guy.

 

[Guests]

Welcome to UKVAC

 

[JohnBud]

hey raylyd, how you doing ??? i see you have joined a couple of sites today.sadly i cant access assembler, so hows about some more about you. what do you fix ??? is it games pcbs or machines ??? its always good to meet new repairers. sadly i dont do repairs due to old age, well that and not having a scooby

welcome to the site of the ukvac, if your into video arcade machines you have defo came to the right place. enjoy your stay and hopefully i will see you about the forums. cheers.

john bud

 

[trm]

Hi raylyd,

Glad to see you making an intro post. Don't take offence at the piss-taking in your FS thread - we're just a sarcastic bunch of f**kers

Do you fix PCBs? Many of the members of this site are into the technical side of things so you should hopefully find it very interesting.

Anyway, welcome to ukvac and I hope you enjoy it here.

cheers
timtrmatthe2010-08-31 19:01:47

 

[raylyd]

Hi most anything i like a laugh so yeh i understand buddy.

I am fixing a tv right now it has a burn out cap called a PTC C1250 I CANT FIND ONE ANY WHERE COULD YOU HELP ME THANKS BUD.

 

[Guests]

is that actually written on the cap or screened on to the pcb? a ptc c1250 is usually a thermistor
AnDyC2010-08-31 20:44:41

 

[guddler]

A PTC-C1250 sounds like it might be a positor to me.

[EDIT] AnDyC beat me to it! Positor = Thermistor != Capacitor

guddler2010-08-31 20:45:57

 

[raylyd]

ITS ON THE PART ITS SELF IT NEEDS TO BE REPLACED AS ITS HAS A CRACK IN IT AND WHEN I POWER ON THE TV IT HAS A LOUD BUZZING NOISE WHEN POWERED ON

THE TV WORKS BUT I WOULD LIKE TO REPLACE IT ASAP PLEASE HELP ME ?

THANKS

 

[guddler]

Just a minor bit of etiquette - all capitals will generally be taken as shouting! And we all know that shouting gets you nowhere

I believe you are looking for a 25 Ohm, 250VAC, 120C thermistor. But that's as far as I can help you as I can't find one at all the usual suppliers.

You may have to try China or the US. Maybe Digikey has one?

[EDIT] Should add, PTC (Positive Temperature Coefficient), not NTC (negative blah), but I guess you can tell that from the part number.

guddler2010-08-31 21:32:08

 

[guddler]

Also, a common use for them in a TV / Monitor is the degaussing circuit which may well explain the buzzing when you switch it on. It may be ok to just remove the component and then the TV may just not degauss any more.

However, I really, really can't be sure about that without seeing the schematics so if it catches fire, don't blame me.

 

[raylyd]

OK I WILL NOT USE THE TV UNTIL THE PART IS REPLACED

HERES A DATASHEET http://www.datasheetarchive.com/PTC%20C1250-datasheet.html THE FRIST ONE WILL GIVE YOU THE DATA SHEET FOR THE PART

FOR THE PART

THE TV ITS FROM A SHARP 21HS-50H

SO IT CAN CAUSE A FIRE OK THIS VERY SO I WILL HAVE TO OTHER TV FOR NOW

TAKE CARE THANKS FOR THE TIP.

 

[Guests]

rayld, Please stop using all capitals.

 

[guddler]

And I didn't say it will cause a fire!!

I said, that seeing as I've got no information on exactly how and where the part is being used I can't guarantee anything. It's called covering my arse in case you did follow my advice and then your TV caught fire.

I have to question why you're even rummaging around in the TV in the first place? Sorry if I've got it wrong since it's difficult to judge just from a forum post but I'd want to know what a thermistor is and why it's used Vs. a capacitor before I started trying to fix stuff involving mains voltage (and above) components.

Messing about with low voltage, low current circuits to your hearts content is one thing (digital circuits like arcade PCBs) but messing with (presumably) degaussing circuits in TV's that are probably not even isolated mains voltage is an entirely different matter.

 

[JohnBud]

i think hes DEAF

i didnt know that was shouting

people often write teh is that just a mis-type ???

 

[raylyd]

Yeh i am sorry guys take care it near the power main part of the board i am not useing that tv unil the part is replaced take care hope i can find a replacement.

 

[raylyd]

could some help me please

 

[trm]

Hi Raylyd,

It looks like Martin (Guddler) gave you the details you need a few posts back. You just need to track down a supplier for the part which doesn't require any specialist knowledge, just time spent googling.

If you've got more pertinent information that might help with identifying the part then post it, otherwise you've got the best efforts we can give at identifying the part already so it's just a job of tracking it down as I said.

cheers
tim

 

[g00n3r]

Gotta be a windup surely?

Take care.

 

[raylyd]

Why would i windup anyone. if i cant find this part i will just have to dump the tv

any way could some one tell me why there 1970s tv and people still are able to get a sorce of parts

 

[guddler]

any way could some one tell me why there 1970s tv and people still are able to get a sorce of parts

Well, I guess not. I did some research on what the part was and what the specifications of it were. Then I went off and spent an hour or so looking at all the suppliers I would normally use. I drew a blank.

Either I wasn't looking for the right thing, or the part has genuinely become obsolete. These things do happen.

There's also the chance that another part of similar specification has become more common and could be used in it's place, hence, again, perhaps I'm not "in the know" in the TV repair industry and so don't know that you can commonly use X instead of Y. I have a good incline on how you might be able to work around this part but it needs schematics for the TV for me to be able to be sure. I'm not guessing on that one. Especially, as previously stated, my suspicion is that this part is likely in the non-isolated 240v section of the monitor.