DIY big screen fix.

Skynut

Friday night I turn on the t.v. and the picture looks all 3d. The three tubes on the projector are not in line with each other.

This is a 10 year old Toshiba 48" rear projection.

This happened once before while I was out of town and the set was still under extended warrenty. The repair man fixed it and I talked to him on the phone, he said he had to replace a fuse and it was all better.

So I figured I would give it a looksie and see if I could do it myself.

I opended the rear of the set and found more dust than I would like to admit so I got out an air hose and put 3 dryers on the end of it. I blew out all the dust I could (all into the house.) and found a fuse, and another, and then even more.
Long story short there are about 9 fuses inside my set and the one that blew is the only one soldiered into place, a bad place.

A trip to rat shack and I got a box of 4 fuses and a fuse holder, the kind you find in wires of your car stereo.
I soldiered the holder into place and put a fuse in. I now have my set back.
Even better I have made the hardest fuse to change the easiest and I have 3 backups.

The set is around 10 years old so I should have enough fuses to last another 15 years.

God, please do not make me wait 15 years to upgrade my set.

Ron-P

Cool Sky. I remember opening up my Mits RPTV, quite a lot of spaghetti in those things. I went in to unplug the SVM wires on each gun. It took awhile to find which ones to unplug.

Skynut

What are the SVM wires for and why did you unplug them?

Ron-P

Here, this is from AudioVideo101.com. You'd have to find out if your older set has it.

Scan Velocity Modulation

Technique employed on some cathode ray tube television sets for slowing down or speeding up the electron gun as it scans or paints each horizontal line of information. The beam is slowed down to reproduce areas of bright light and sped up on areas of low light or low brightness.

The process of scan velocity modulation causes distortion in the output if dark and light colors are close together or contained within one another. Dark areas tend to become larger and light areas smaller than they should be. The technique causes phosphors in light areas of an image to be overdriven and produce too much light output (blooming) and reduce detail.

Scan velocity modulation is sometimes listed as a valuable feature, but in fact it causes picture distortions. It is best to look for a television that does not use this technique or on which the technique can be turned off.

Skynut

Nice info, thanks.