[–] 2 points 1 year ago (3 children)

I've seen the pic. So the plate is not the component? I thought the whole plate was the component. In that case, if it is a small metal plate like any of this, then it most likely is a thermal cutoff.

Thermal switch variation

It's not running the compressor in reverse necessarily. It just used to sense when the temperature of some point has reached some threshold. Remember, a high temperature on the cold side could also be used to trigger the compressor to cool down the fridge.

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  • [–] 2 points 1 year ago* (last edited 1 year ago) (7 children)

    It seems like I cannot find a picture of your component (if you ever posted any). If it is metallic looking, it is probably a thermal cutoff of some sort. The wikipedia article focuses on the fuse-looking one, but there also exists a flat metal plate looking one. The connection is usually normally open so if the temperature on the loop is ever too high, the motor (compressor) will trigger. The normally closed connection one is for motor overheat protection. That kind is usually placed/glued to thbe e stator body, so if it ever gets too hot, it will stop the motor instead.

    Edit: The picture provides a clearer size of the metal plate. A plate of that size is not a thermal cutoff. I don't know what it is either. But if it is indeed a heater, you should be able to measure the resistance. If it is a resistive heater, usually it will have a low resistance (usually <10R). And metal is not "cold" at room temps, they are the temperature of room temps. It just feels cold because of higher thermal conductivity

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  • [–] 2 points 1 year ago (1 child)

    Oh man, that manual is quite descriptive. I wish they could add a schematic or two there. But anyway, as others have suggested, be careful with CRT, but I guess you already know that. Next is from the circuit description, it seems like the display accepts some form or VGA signal without the color. You can see Ben Eater video to learn more about it, especially the line sync and vertical sync signal part

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