Sony KP-41T15 - Focusing Lens?

A few scratches on the lens shouldn't be noticeable. If you do need a new one, it's part number 4-034-057-01 for the red or blue and

I've never had any trouble with the MCM coolant and it's by far the cheapest. Wash out all the old coolant before refilling because they don't always react well to mixing.

Be sure you repair the seal well because if it ever leaks it can cause lots of damage to the TV. I'm not sure if replacement seals are available from sony because they aren't listed in the service manual. Make sure all traces of spilled coolant are washed off the boards because it doesn't evaporate and it will cause shorts eventually. Andy Cuffe

snipped-for-privacy@psu.edu

Few things. The mirror is a first surface mirror, if you have one cut, make sure the glass/mirror place special order a first surface mirror or you will have a double shadow image. We have used a standard mirror cut when the Sony one was on backorder to get the customer working until the correct one came in.

The scratch on the lens may not even be visible on the image as the two focal points are the face of the phosphor and the actual screen. The replacement lens if it is still available will be around $300 from Sony.

Crt coolant from MCM is ok to use.

The inside lens that I would assume was scratch from the glass is the fresnel lens. Any scratch in that is clearly visible.

Your best bet might be to try and find the same model that is not working but has good mirror, lenses, and screens.

Thanks for the info Andy. I have an opportunity to pick up a replacement

Replacement seals are, unfortunately, unavailable and while I can use silicone to seal the piercing, I don't think I want to take the chance of it negatively effecting the expansion port (or even as you mentioned, leaking in the future and totally destroying the boards (also unavailable).

Bruce Haugh Winnipeg, Manitoba, Canada

Thanks for the tip on the mirror. I found out that there is another local technician who keeps stock of this type of mirror and custom cuts them. I'll get this from him.

You are correct the scratch is on the inner (smooth) surface of the fresnel lens. The scratch is light enough that a CD scratch repair process may be successful.

I will try to search for a non-functional KP-41T15 (or, off the top of my head I believe the 41T65 is equal)

Bruce Haugh Winnipeg, Manitoba, Canada

I wouldn't bother with the red CRT since it's usually the last color to go. I often see old projection TVs with totally shot blue and green CRTs, but perfect red. It might be worth it if you can't properly seal the old CRT.

Andy Cuffe

snipped-for-privacy@psu.edu

The only Sony I had to replace a mirror in was just a standard (non-first surface) mirror. It surprised me, but I replaced it with the same type of mirror and it looked fine. Andy Cuffe

snipped-for-privacy@psu.edu

In looking at a shard remnant of the mirror, this is not a first surface mirror. It is glass with the mirror coating on the back. It looks pretty standard. This set is from 1995 and I would guess from a cost point of view, it was cheaper for Sony to build it this way. The newer models are likely first surface mirrors and I suspect that they use these now because they provide somewhat better performance.

Bruce Haugh Winnipeg, Manitoba, Canada