Re: TDC Selectron Gate Hang-Ups

[P3D Elliott Swanson <elliott@xxxxxxxxxxxxxxxxxxxx>]

Stephen Warren asks re Selectron light shutter hang ups... I had this 
same problem. There's a little sheetmetal arm inside that can get bent. 
The way I fixed mine, which also allowed me to clean it of the 
accumulated gunk and old grease (and then relube) is to remove the screws 
and drill out the rivets that hold the sides together. DON'T drill out 
the rivets that hold the spring clips or any other parts that are secured 
to the side of the unit.

When the unit is apart, straighten out the light shutter, and the shutter 
arm. 

Use 1/4 inch 4/40 pan head screws to replace the rivets. This will mean 
tapping the block of metal the sides are secured to, as well as the sheet 
metal side panels. To get the unit so you can get it back into the 
projector, you will have to grind the heads of two of the screws flat to 
about 1/64 inches thick. It will be obvious which ones.

Before you do any of this, check for some obvious jam, like a piece of 
film stuck inside. Also, you might want to try and dunk it in naptha to 
remove grease, and relube. Naptha is extremely flammable. You might get 
lucky and just need to remove crud.

But if the shutter isn't moving freely due to being bent. You've got 
about 45 minutes of work to tear it apart and straighten things.

For informational purposes only. Do any of the above at your own risk.

Elliott





















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