Sorry for the delay. I saw the comments only today. If you know the model and make, look for a free service manual for download and take help from there. Check whether any child lock or any other lock system has been activated from the remote. The protect mode normally comes on whenever there are power supply problems, one or more of the dependent functions such as loading motor, sliding motor and spindle motor does not turn, or the sensor switches are faulty. It can come even when the lens is dirty. You may have to do a thorough check up.

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And heheh, I've heard of rare instances where transistors fail without shorting or going open circuit. Usually there is a reduction in the gain (hfe), however sometimes, they can simply become noisy. This is an issue that pops up now and then in audio amplifiers, since the noise manifests itself in the speaker/listener's ear ... 😛

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PS: I once build an ELV (German Kit Manufacturer) GLP 7000 Gleich-Prüf-Gerät (a Tapedeck Synchron Test Meter) which I am able to check and adjust the Tape Speed, Wow and Flutter and also Drift of any Cassette Machine. It has two Test tone settings : CCIR 3000 Hz, and a second being DIN which is a tone of 3150 Hz. Plus a Calibration, Drift and Wow & Flutter Setting. Cassette Decks sometimes may need to be recalibrated on Speed and tested on Drift and Wow & Flutter. And Most Capstan Motors have an integrated electronic speed adjusting controller that can be tuned with a small screwdriver for these circumstances. I may also have a schematic of this Device. And maybe you are able to download it from the internet? Cheers.

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Yes thank you dear Parasuraman S. Although I am not familiar with Favibond nor with the Superflue glue you mentioned I will give it a go once I am able to obtain it. And try it according the way you say to best use it. Thanks for the Info!

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(1) Serial number will identify the set and in the event of the next buyer looking at this article, by chance, this will cause drop in the value, reasons for which are obvious! (2) What I said is combination of Fevibond and Superglue cannot be applied on belt, because of its narrow surface. I have suggested combination of both only on surfaces such as plastic or plastic+metal broken joints, like a cassette door, front panel etc. The tips of the belts will melt and join together tightly when you apply Superglue. Fevibond cannot hold belts, as the technology is different. It sticks itself to the surface, and sticks both sides through the glue. But Superflue melts the surface and bonds it, aparts from its own glue. That is the difference. Fevibond does not melt the surface. It can be easily removed also! Hope I am clearer now!

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