Question: Sony KV-27S22 Average lifespan of the unit?

CRT loosing its emissions,time to replace it.

Common on these. The CRT is going.

The green gun is the most commonly affected on these. I dunno if it's because it's in the center of the neck and runs hotter or if their green phosphour is not as efficent and it's driven harder.

Whatever the reason, you are probably ready for a new set, or another used one. I can get a CRT (picture tube) for these I think for about $200, add about $100 for installation and chassis maintenence and your set is a bit better than a new one, but parts will become NLA (no longer available) as time passes.

You can probably watch it for awhile if you turn up the G2 or do a restoration on the CRT, but either option is short lived.

If I had to get a TV I would look for an old RCA with a CTC169 chassis. They are not too bad, if you go buy a new set, I have no recommendations. Just buy what you want and don't get too attached to it.

I just tossed my Mom's 27TS27 alomg with it's third CRT, time comes. Sony CRTs simply do not hold up.

Go ahead and buy a new Sony if you want, five years from now when it gets the "pink blink" syndrome, get another. It won't be nine years this time, but it wouldn't be with any other brand anyway.There is always something that kills enoiugh sets so the manufacturer stays in business.

For now, stay away from DLPs and LCDs unless you have alot of money.

JURB

On most the red is hardest driven. Many old Sony Tvs had an external green drive control. Some thought that this meant the green lost emission first, but in fact it was there to allow easy compensation for the red ageing.

The picture tube is very likely getting bad. You need a Tech to look at it. You have two choices....the Tech does I mean. Read my post from a while ago. Dani.

I would like to share this great tip with all you great helpfull Tech's

out there! This is only for Technicians who really know there way around the inside of a T.V.! Please don't just anyone try this!! If you

don't have a proper CRT rejuvinating set, this will be a great fix, for

an otherwise lost cause.

Sony 1 K problems, that is T.V.'s with the red, or green, or blue having too low, or high of an emission to get a raster due to the "blanking circuit", can be solved with an odd, & somewhat dangerous technique! With the set off, unsolder each cathode on the CRT board, then momentarily bridge the gap of each gun, one at a time, to see how much emission there is. You will have to raise the G 2 pot to get a bit

of raster in a darkened room! Next solder the two good cathodes (usually only one is out of gain specs), back, leaving the bad one. Now

this is where it gets dangerous!!! While the set is off remove the focus line from the CRT socket ( 5000 volts), & while the set is running, momentarily make contact with the unsoldered leg of the bad gun. Do this with caution, & at least five times. It will try to arc, but just keep a steady hand, & keep the wire with a good insulated tool

at the unsoldered leg only. Now, while the set is off, unhook the G 2 wire, & set it to about 200 volts DC unloaded, & charge a 100 uf capacitor @ 250 volts. Do this two, or three times, then discharge it to the unsoldered gun, while the set is runing. Do this charging, & discharging to the gun at least five times! At this point, you should see the bad gun get brighter, & brighter. I have done quite a lot of experimenting, & this will save a lot of those Sony CRT's, that would otherwise be toast. Grey scale comes back to within a close enough spec, to make the customer happy. Just don't give a long warranty. Hope

this helps you all out. Take care, Dani.

I heard of people blasting crud off monochrome CRT cathodes this way back in the 1950s. Like you say, don't give a long warranty.