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Re: Aiwa HV-MX100 multiformat VCR won't power on...
Too little information to give any information / help / opinion.
What actually happens? Does the Display come on properly? Do you hear any mechanical Noises? Like a motor whirring? Are you able to load a cassette into the machine? Does it get ejected automatically? As you say that the machine switches ON, I assume tyhat the Power supply cicuits are Ok, and this leaves us with the possibility that there is a mechanical problem.Is it that the machine was not used for a long operiod of months or years? If that is the case, in all probability the belts are damaged / broken / loose.
I really need more info, please.
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Is your VCR fixed? From what you have written, I understand that you have not used the VCR for many months. And since you are hearing a whirring noise, the eject motor is working, but the belts are spoilt, and are slipping. Hence your problem. I suggest you open the top cover of the VCR and observe the eject mechanism. As suggested, you will - in all likelihood, observe that the belt driving the eject gears is slipping.
Dave, your problem is most likely with the mode sensors. I had the same symptoms and it turned out that some lubricating gel had migrated onto the electrical contacts that make up part of the mode sensing system.
If you go over to the HV-MX100 page, I've posted a guide (with photos) under the Tips section showing how I fixed it.
This often indicates an error condition of some sort. Has a tape been forcibly removed or forcibly inserted? If so, then mechanism timing or positioning could be out of whack. In regards to timing... often, the cassette carriage, and other mechanicals are gear driven, and if a gear set should jump a tooth or more, timing will be off. Often the gears had marks on them which must lined up according to manufacturer specs.
Other possibilities include: dirty/erratic mode switch (tells the logic circuit the position of the mechanicals), or a bad sensor. Malfunctions in the electronics are still another possibility.
If this is a low-cost VCR, as are most in the last 10+ years, repairs might not be cost effective.