On 09/03/2020 21:56, Brian Gaff (Sofa 2) wrote:
Is the motor a brushed on, and is it worn or damaged internally? The extra
current spikes from a faulty motor can easily blow fuses., what else
protects the thing if the motor seizes and shorts out the supply, do the
resistors catch fire?
Brian


There is another conventional fuse in circuit.

The thermal fuse is in close proximity to the resistors and if they get
too hot the thermal fuse blows stopping the resistors getting any hotter
by removing th voltage across them

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