Yes, quality always matters for capturing valuable memories that's how we got into this hobby in the first place.
If we can find a way to disable the DD motor entirely by a mean of electronic pulse mimicking, the entire drum assembly can be replaced with a fixed style drum from a newer VCR with the same type of mechanism, The new head has to have the same head count, the same stator poles, In other words the head ribbon pins and motor ribbon pins have to match perfectly.
I have a working VCR with a defective DD drum system that is in storage right now, I will try to get some free time and get it, Then I use the oscilloscope or the true RMS DMM to measure the frequency of the signal coming from the motor sensor during initial motor check and its trimmed voltage, using that we can source out a tiny frequency generator that feeds those pulses directly into pin 59 (DD_FG) of the main processor ICU3001 and 5V supplied to the DD board CN3701.
As to the second sensor, as I said above I think it just reports ON or OFF position, meaning that if the flap covering the sensor, it is OFF if not, it's ON. I will have to double check that as well.
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