Question about Sony XBR

[kx250rider]

Originally Posted by Eric H

Since it's sets sold overseas on Military bases perhaps something related to Dual Voltage operation? if they had such a feature that is?

I see several US-only models in the list, so those wouldn't be dual voltage.

Here, off the top of my head, would be the best guesses at the part causing the risk:

Degaussing thermistor (gets bad connections and keeps cycling on/off, causing AC line voltage to burn a hole in the board)



Flyback (most likely cause in my opinion... Arcs, smokes & flames, but usually blows the fuse before starting any fire)

HVR block (can arc and flame out like a blow torch, but seldom seen in Sonys. More likely in RCA CTC-169 projection version, etc)

AC line input choke (can arc and cause AC line voltage to burn holes in the board)

With that said, ANY, and I mean ANY item which plugs in, or has batteries, can cause a fire. So can Coke bottles, fancy crystal decorations in the sun, etc etc etc.

If everyone used common sense, there would be little to worry about. If you leave your 1984 Sony TV, or any appliance running unattended in an empty house, you probably are asking for a problem sooner or later.

Charles

[site123a]

I think the clue here is what design / part change Sony made to there TV's after 1990.

[mbates14]

At least to me, it seemed like every sony had significant chassis changes, while alot of it remained the same as well....

[colorfixer]

I agree with Charles, you can't mandate or design in common sense. On the overseas list, there is a swath of US models. Notice that a lot of these aren't on the US list.

[rca2000]

Before 1990...a LOT of Sony sets were "hot", in regards to the power supply, (like my little 1985 model KV-1371 sitting behind me with RTV on it right now), and they liked to used a pretty big series resistor in them in the power supply and a series regulator. It MUST be something like that. The flyback of course could do this--but the 90-on sets did NOT change the fly's by that much---if in any significant way. However...MANY of them were then "cold" with a switching power supply.

[rca2000]

Originally Posted by radiotvnut

. I think this is more of a stunt to scare people into getting rid of their old TV's.

I FULLY agree... scare the masses into getting a new, crappy flat-panel set.

[mbates14]

I guess sony is scared that these sets actually last awhile. lol.

[Zenith26kc20]

If I remember right, I have changed a number of convergence blocks in that era set(s). The block cracks and can arc to the point of burning its plastic housing.
It was mounted on the side of the CRT shield.

[freakaftr8]

I cant rememberr seeing a sony sety go up in flames? Anyone?

[dieseljeep]

I picked up a KV1473RWP at a thrift shop a couple years ago. It appears to mid 80's design. Dont know where it came from, but it says on the front " TRINITRON AUTOVOLTAGE" It definitely was made for a foreign market.

[kcvet]

I worked on tons of 20/25XBR's when i worked for Sony. never saw any lawsuits or units exploding into flames

[kcvet]

Originally Posted by freakaftr8

I cant rememberr seeing a sony sety go up in flames? Anyone?

yeah anyone??? not me and i worked on em

[Trance88]

They said due to the age deterioration of this certain part, it might cause a fire. If Sony will ever say what this part is, people who are good with working on TV's should be able to just change the part out for a new one unless it's a special part.

Originally Posted by Zenith26kc20

If I remember right, I have changed a number of convergence blocks in that era set(s). The block cracks and can arc to the point of burning its plastic housing.
It was mounted on the side of the CRT shield.

I know my '84 sony Trinitron has a slight convergence problem in the lower left hand corner of the picture. It might need a new convergence block?

[kcvet]

Originally Posted by Zenith26kc20

If I remember right, I have changed a number of convergence blocks in that era set(s). The block cracks and can arc to the point of burning its plastic housing.
It was mounted on the side of the CRT shield.

it was called an HVR block. to adjust convergence. it caused intermittent shut down. ususally the crack was on the bottom. thye were money makers

[kcvet]

Originally Posted by Trance88

They said due to the age deterioration of this certain part, it might cause a fire. If Sony will ever say what this part is, people who are good with working on TV's should be able to just change the part out for a new one unless it's a special part.

I know my '84 sony Trinitron has a slight convergence problem in the lower left hand corner of the picture. It might need a new convergence block?

we used strip magnets for corner correction.