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I don't have pricing information any more, but the great majority of the lenses made for slide projectors by D.O. Industries were made for Kodak Slide Projectors. If the lens is slightly more than 2 inches in diameter & has a ribbed "rack" running the length of it, then chances are that it is for a Kodak Slide Projector.
The issue is the clutch contact inside the projector. The contact is either broken or out of adjustment. The clutch spring protrudes from the hub of the mechanism camstack. The camstack makes ONE revolution for ONE slide cycle. The clutch contact stops the clutch spring at the end of the cycle, putting the projector in "idle", awaiting the next "cycle" signal. Based on your description, this is your problem area. Turn the projector upside down & remove the bottom cover. CAREFULLY remove the internal lenses with a CLEAN, lint-free cloth. Wrap each lens in a separate cloth, as the lenses can shatter if exposed to rapid temperature changes. Next, remove the lamp with another cloth & keep it wrapped, as well. CAREFULLY plug the projector back in (DANGER - EXPOSED VOLTAGE!!) & turn the projector to the "Fan" position. Look for the rotating camstack. Turn the projector on & off quickly to locate the straight wire protruding out of the camstack hub. Turn the projector OFF & UNPLUG. Now look for the "J"-shaped wire that SHOULD make contact with the clutch contact. You will need to re-form the clutch contact wire VERY GENTLY (the wire is brittle!!), so that the straight wire is JUST BARELY trapped by the "J"-shaped wire. Now plug in & turn the power switch to "FAN" to check that the camstack only makes ONE revolution. If it stops: GREAT !! If it still revolves multiple times, repeat the process until the camstack STOPS after ONE cycle. This should resolve your continuous cycle problem. Good Luck !! Jim
Unfortunately, there is not a happy answer for this one. You will need to buy another zoom lens. They are cheap & easy to find on the web !! Good Luck !!
If you have a jet air - compressor or blower- use it to clear the filter of the trapped dust within the filter. Once the filter is clean the flow of air to the lamp unit will be improved and so give you longer life on the lamp. A tiny bristle type brush can be used-- the brush of your electric shaver.
this is the light tunnel needing to be adjusted or replaced because is has collasped due to the heat given off by the lamp during the life of the projector.
can you take some pictures of the optics and send them to me ? this could be a circuit fault or a defective run from the manufacture, you will half to identifie whether it is optic or circuit related, try and place a piece of color filter opaque paper between the optics and try to notice the changes on the screen this may give you an indication which element may be faulted, or if it is electronic
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