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Motorized roller blinds are a very functional option. This type of roller blinds can be automated. As is usually the case, the engine will wear out or be damaged after some time. Then you just have to replace the engine. Replacing the motor itself is a simple matter. But to get to the engine you have to flex a bit. You have to open the shutter casing and then unwrap the curtain. It is impossible to turn the shaft because it is coupled with a gear with a large ratio, which prevents the roller from turning. You have to unlock the bumpers in the armor. and pass the roller blind over the roller several times. Then it remains to remove the shaft with the engine and replace the engine. See how I replace such an engine.