What are these ?

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Connect test leads/clips regardless of color. Normally red is + and black is - but this case if different as one of the caps has + to GND. DMM set to Voltage DC. Just 1 cap is enough but measuring both is better. The + or - does not matter, just the value like 46V.

ALWAYS connect leads when the device has been powered off for a few minutes and always pull the mains plug. Work with one hand behind your back. Don't have the crocodile clips shorting and don't have them slipping off.
 

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