Question about Office Equipment & Supplies
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Posted on Jan 02, 2017
SOURCE: why wont it stop
With that style (4400) of projector, this was usually caused by the trigger on the clutch assembly getting gunked up with dirt and/or grease. Assuming you've removed the bottom of the projector and it's now upside down, lens facing away from you, you'll see a large white gear and near the edge of it will be a grey metal sort of trigger. On it may be resting the L-shaped finger attached to a solenoid.
IF you are confident you can operate this safely with power applied, you can do this, ONLY to help pinpoint the location if you need help. Then remove the power again. *If you are not sure, do not apply power.* Using the remote control so you do not have to put your finger near the cycle (forward/reverse) buttons on the projector's side, activate the forward button, with power turned to fan only (or remove the lamp module). You will see the L-shaped solenoid finger jump briefly and the grey metal trigger
may rock a bit as the gear turns around. And in your case, continues.
Disconnect power if you had it on, and look at the little grey trigger. There is a tiny spring on it and it pivots when you press gently on it. What should be happening is that the L-shaped finger gets caught on that grey trigger and stops the rotation of the gear, as the trigger rests in the edges of the gear. When the solenoid is activated, the L-shaped finger jumps up, releasing the grey trigger which can then rotate one cycle. The trigger should immediately have gone back to its resting position so that it catches the L-shaped finger again and the finger holds the trigger which holds the gear(clutch) from rotating.
Dirt and lubricant has gotten in there and the grey trigger cannot return to its position in time. Eventually it may if you let it cycle long enough. The solution? Use some contact cleaner to clean out the gunk from the pivot of the trigger. It shouldn't take too much. In a pinch you can likely use isopropyl (rubbing) alcohol with cotton swabs. Clean away all the gunk you can but be careful not to get the degreaser on other components. Lint free cloth or paper towels around the clutch gear may be helpful.
Now, the trigger should be able to return to its resting position quickly. If not, repeat degreasing- again it usually doesn't take much. Now, put only one (maximum 2 small) drop of very light oil. Consumers can use sewing machine oil. Too much will later lead to the problem recurring.
Now your projector should be cycling fine, though you might have to turn it right side up to judge accurately. If so, turn it over again,power off again and look where the grey trigger and the L-shaped finger contact each other. Steal just a little bit of grease from the large white clutch gear -use some soft plastic piece like a cotton swab shaft so you don't gouge the gear- and apply it to the contact point. This is not absolutely critical but is recommended to avoid excess wear at that point.
Reassemble, being careful to dress (put inside the housing) the wires so they don't get pinched. Do not over tighten the body screws. If you like you can e-mail me at firstname.lastname@example.org and put "Projector" in the subject line.
Posted on Mar 28, 2008
I just spent 20 minutes writing up the solution and because I wasn't logged in, it dumped my post! So, IF you are still in need of a solution, you can e-mail me at email@example.com and I'll post it here again. If you have already got it fixed I won't bother spending another 20 minutes re-writing!
Posted on Mar 28, 2008
Open the back up and spray just a LITTLE bit of WD-40 into the cavity where the bit of spring emerges from the grease covered cam shaft. This will loosen up the grease that has dried up. It may take up to half an hour to work on the grease. If things are improved but not perfect, repeat. If any WD-40 spills out, mop it up with Q-tips and especially avoid the rubber belt.
Please do NOT advance things manually ans especially don't pry apart any of the plastic or metal cams on the cam shaft in an effort to correct the timing. You will put it out of waht and it will take a whack of time and/or an expert to get it back in whack!
Posted on Feb 19, 2009
either the switch terminals are making a constant contact, or the advance solenoid is shorted on. you'll have to take the control panel apart to see if the switch pieces are touching. if not, you'll have to either find the short or take it in for repair.
Posted on Nov 13, 2009
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