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Keystone movie projector

When turned on it powers up. Doesn't move any of the reels or feeding gears. Is there a belt that just need to be replaces?? thanks Leonard

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There should be a belt inside that transfers rotational power to the gear train. the belt may be a long spring type of belt.

Posted on Nov 29, 2007

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I have a Riso GR 3750 and have a T 2 and T1 error and can not pull out the drum (we don't get a green light) we also tried shutting down while holding the reset button to no avail. when we accidentally...


The syncronicity of feeding mechanism and drum is lost. The sound was the jumping of the toothed belt.
Seems that the stripping finger or the blower is stuck in the clamp mechanism blocking the drum moving forward. This problem can be caused by a worn rubber reel. So the stripping finger is not lifted enough any more.
Remove the back cover. Locate and check the rubber reel running at the excenter of the print drum. Do not turn the machine in forward direction till this is solved. Else you may damage the clamp mechanism.
To restore synchronicity you have to remove tension of the toothed belt by loosening the 3 screws around the paper feed clutch. Turn the mechanism clockwise and fix a screw temporarily in this position. Now it should be easy to lift the toothed belt over a tooth, moving a bit, and so on. You have to move the drum driving mechanism till the sensor there meets the small hole. At this position the sensor at the paper feed mechanism should match the cutted semi-circle. Synchronicity restored. Restore tension at thoothed belt and test.




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Cassette loads and won't play. Cassette won't eject, or if it does the tape itself hangs inside the VCR. The cassette reels do not turn anthough the head does. I believe the problem lies with the belt...


Hello
There si one belt connected to its capstan motor to reel drive gear assembly to reel up the tape. If this belt has either loose or broken, the fault you described here will occur. To change the belt, you have to buy one new with same diamentions. To get it, you must ahve the damaged belt in hand as sample. Just look at its bottom side, and is there any extra sid screwed into, which can be removed to see and take the belt away from the mechanis. There will be one, with every Toshiba VCR. If so, open it by unscrewing the screws, take out the belt, buy a new one and replace it.
Before doing this, make sure that the capstan motor is rotating or not. Just unplug the VCR from power socket, and replug it again. If capstan motor try to rotate even a single turn, it means that it is OK. Replacing the belt should solve your problem.
If you want anymore asistance, feel free to get me through Fixya. OK.

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Generally speaking, there are two reasons this happens.

[1] tape recorders have to move tape past the record/playback heads at a highly consistent and accurate rate of speed. What makes this possible is a rubber "pinch" or pressure roller and a spinning metal spindle. Tape is routed between the roller and the spindle, and when the recorder is in RECORD or PLAY mode, the roller presses the tape against the spinning spindle, causing the tape to move from the feed reel to the takeup reel. When the pinch roller and/or the spindle become coated with oxide particles shed from old tapes, they get sticky and the thin tape will begin wrapping around one or the other. THE SOLUTION is to get some cotton swabs and rubbing alcohol and clean the oxide (brown from cheap tapes and dark gray from better tapes) from both of these parts.

[2] many tape recorders use rubber belts and pulleys to turn the feed reel and the takeup reel. If the tiny rubber belt that makes the take-up reel turn is stretched, it will not wind moving tape fast enough, which causes tape to bunch up. If this is the problem (you will not be able to see the belts without removing the recorder's outer case), then you might as well junk the recorder.

If you see that the part of the rubber drive roller that contacts the moving tape has a ring of brown or gray coating on it, you

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Sounds like the take-up reel isn't turning. Often the linkage for the take-up reel is used for both Play and Fast Forward. So test the Fast Forward.

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