Question about Kodak 4200 Slide Projector

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Slides advance continusly

Havent used projector in years when finally got the wheels to turn, the slides advance cotinusly

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I can solve this i think but am pretty busy right now. It's also cheap and usually easy. If you can carefully open the shell (body) , with it unplugged of course,note where all the thin wires belong for when you put it together again. Assuming you have the projector open and on its back, look near the top, centre roughly. You'll see a white, thick gear that gets driven by a long worm gear/pulley that is driven by the motor belt. Above the thick gear is a silver-grey metal catch or "trigger" and resting on - or near it- will be a (usually) copper coloured thin metal "finger.

in normal operation this finger catches on the grey metal trigger which flips into position and catches the clutch built into that thick gear. When you activate the slide advance, the solenoid, for a moment, pulls the finger off the trigger which moves the triger which allows the clutch to engage and turn the thick gear, driving the mechanism. What's happening is that over time the light grease has thickened and the trigger is not engaging properly.

In some cases, all you need to do is just activate that slide advance a couple of dozen times, or let it keep advancing a few dozen times. You might try this before takign it apart. It selldom is enough but might be. usually though you'll need to look carefully to the pivot point of that grey metal trigger. If you have any contact cleaner for electronics (degreaser) get a little on and behind the rivent that holds that trigger and let's it pivot. With your finger, getnly rock the trigger back and forth. Repeat a few times if necessary as that cleaner evaporates quickly. If you don't have such cleaner, you can use a bit of WD-40 or alcohol can sometimes do the trick. Rubbing, not whiskey! Whatever you use to clean out the old, dried lubricant there, be careful not to let it get into other areas of the mechanism! Especially the WD 40 whihc has both grease cutter and oil. Oil in the wong places will give you bigger problems.
Eventually the trigger should move very easily and return to position quickly when you release it. Now you want to put a drop or two only on that pivot point, of the lightest oil you can find. Most easily accessed is light sewing machine oil.

You may decide to plug in the projector now -remove the lamp first. it is dnagerous at this point so be careful, or before you plug it in, put the shell cover back on. If you cover it hough, you can't see what's happening. In any case, run it, advance the slides via the remote preferably, a few times and unplug it.Hopefully it's stopped advancing continuously by now.

Take a look at the point where the "finger" engages the "trigger". You want to be careful not to bend the finger or things'll get out of whack.But IF you can (unplugged again!) spare just a tiny bit of grease from that thick gear, put just a bit on the trigger where the finger rests. If you can locate a clear coloured teflon added lubricant called Super-lube (also sold under at elast one other brand name I can't recall), that is the stuff Kodak used.

Reassemble carefully and try 'er out. If you run into any problems, give me a shout at . Put Kodak in the heaidng so you don't get spammed out.

Posted on Feb 19, 2009

  • Derek Madge Feb 19, 2009

    oops! ignore that first line,lol!



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