I have a Sanyo 4-head VCR Model VWM-950. The cassette tape will not load. I have had the top off and believe it is a problem with the LEDS that serve as the detector that the cassette has been inserted. I think one of them is bad. I do not have a schematic or parts list to complete the troubleshooting. Does any one have any thoughts or have either of these available?
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Re: Tape will not load
A schematic would definitely be a plus here, as you could then check the logic levels from the sensor(s), as the "light path" is interupted. If voltage levels changed properly, and no tape load was initiated, then this would indicate a problem elsewhere.
You may want to also check for the presence of power supply voltages. If the voltage supply for the loading motor (often the capstan motor) is missing then there would be no load initiate.
It sounds like you have some knowledge of how these things work- a good thing.
As you are probably aware, todays electronic equipment (VCRs included) is substandard, disposable, not worth investing much if any repair. Find an old Panasonic manufactured unit, and such will often outlive several of these "lighter than air" cheap rascals.
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Well it might be 2 things like maybe the tape is broken like the white circle parts on the bottom of the castette tapes are loose or broken or the machine for the part that allows the tapes to sit in there might be broken or have something inside of the vcr like a coin or another forein odject like that then.
Take the top off and spray the main head with Servisol Video 40. (image below) Also the tracking and audio heads.
Wait for it to dry before putting a tape in. In the future use only this it is much better and cheaper than cleaning tapes.
1. Set tv to channel 4
2. insert a pre-recorded tape into vcr.
3.press play once to start playback.
4. after a few seconds press play on the vcr for 3 sec you will see a playback picture.
when a picture doesn't appear on the tv screen repeat step 4.
5. press stop to stop playback.
the heads on the sanyo vcr may slightly be out of alignment from years of use.when playing a recorded tape from this vcr to another, the other vcr's alignment maybe right on track thus causing the poor quality.you can possibly try cleaning the heads with a head cleaner or a high grade blank tape,but i don't think this will solve the problem. but you can try.
p.s also try higher quality tapes to record on.
Just the usual problem of needing the rubber belts replaced.
The VCR's has a sensor that monitors if the take up reel is
turning. If it doesn't turn for a few seconds then it shuts
down. The most common problem is the idler tire (or clutch)
starts slipping too much abd the take up reel doesn't have the strength
to pull the tape back into the cassette.
Buy a kit of belts for your model from all kinds of sites on the net
and install them yourself if you are handy with delicate mechanisms.
Hope ya fix it!