Repairing a CRT TV

poppellerant

Television repair shops still do exist that repair CRT televisions. In fact I rung one a while back and was told they don't repair flat screens.

[Deleted User]

stevemcol wrote: »

I do agree though that the big plasma / LCD screens, combined with digital multiplexing/compression make for a much worse picture than we used to enjoy with a decent analogue CRT.

I don't think that's the case with High Definition channels and Blu-Ray. I agree standard definition is far poorer on flat panels, though.

pineapple

My Sony CRT lasted 20 years and the little Sharp one is about 10 years old now. It's a small TV with the rear pointing into the corner of the room so big and bulky doesn't come into it and it doesn't take up any more useable space than a flat screen. It's a better picture than the neighbours LCD and I get the same good pic whichever angle I view it at - I understand this is an issue on some LCDs?

[Deleted User]

pineapple wrote: »

My Sony CRT lasted 20 years

Lots did last longer than ten years, but twenty years is a long time in televisual terms. Most of the "features" on that set will have been long since superseded by the time it finally expired.

pineapple

Moneyineptitude wrote: »

Lots did last longer than ten years, but twenty years is a long time in televisual terms. Most of the "features" on that set will have been long since superseded by the time it finally expired.

It probably depends on what features you want. I just wanted plain TV, without DVDs, games, videos or whatever. If I remember rightly it had a couple of scart sockets - amazing for a set that old. It was just enough that I could connect to my ancient Panasonic Sky box for Sky Freesat. Plus the picture was superb.

Ratboy

I managed to download a manual for the Panasonic 32PL10, or so it seemed, but my chassis is a Euro 4-H chassis that uses a different RGB decode method..And that manual I don't have. The chassis is the same as; but the RGB section is different. DOH!

I used to fix Microvitec monitors, RM, and Philips monitors back in the day, but had a service manual to help. Most faults were stock, or traceable via a veng diagram, check this, if not this do this...easy.

The only colour descaling issue I ever encountered, was a Philips 8833 monitor, that required a TDA chip to be replaced. That I fixed; other's that I didn't were large screen Amstrad TV's (CRT 44"!) that had tube issues. I don't believe this TV to have a Philips CRT, maybe Yamaha?

To the poster that states Philips tubes have had an issue; I fully agree with you; I bought from a shop that does seconds a Philips TV, and it was deemed the tube was faulty, 3 goes later, I got my money back...all Philips tubes were faulty.

To the poster that fixes TV's; can you supply the relevent RGB path/service manual?

I'm loathe to go in there poking about when it's such a large item to manouvre (sp); with little knowledge how to repair, with such high voltages. I'm sure it is something simple and cheap to prevent this going to landfill. I'm a hoarder!

And all the while my B&O 30 yo TV in the bedroom soldiers on...even after if went F****** BANG!!!!!!! ten years ago, scared the life out of me, smoke and everything.....but switched on and works normally to this day....

standinman2009

From figures obtained its estimated that LCD will have life twice that of CRT

pineapple

standinman2009 wrote: »

From figures obtained its estimated that LCD will have life twice that of CRT

I'm not convinced about this so I checked with Mr Google. It seems there is plenty of evidence out there for opposing points of view!
In any case can you truly know one way or the other seeing as LCDs are still the new kids on the block - as opposed to CRTs that is.
In the meantime I'll be cautiously sceptical that an LCD from new would last longer than a CRT from new. If only because we live in a more throw away society.

bluesnake

ratboy, from one of your previous post you said you can solder.

Remembering correctly?? and without a circuit diagram, the gun can either be controlled by the cathode or the grid, cathode being most commonest.

Providing they are the same voltage ranges, swap the red cathode wire with the green cathode wire.

if green colour now appears and red colour is missing, you know it it electronics. If there is still no green, then it it is the tube problem or or grid control, but you probably couls swap the grid control wires too.

peter999

amiaspden wrote: »

You don't have to replace it with a flatscreen though. Still plenty of good CRTs being given away on Freecycle or sold for a few quid in the charity furniture shops.

Lot of charity shops & 2nd hand shops don't take them anymore.