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Sony UL the consumer product safety Commission forgot primarily over current protection

Sony UL the consumer product safety Commission forgot primarily over current protection I show and explain how i put a ac primary line fuse in a sony cassette deck model tc-wr520 that had no over current protection in the ac 120 volts primary however it had fusses in the secondary but that wont help prevent a shock or fire if the short happens in the primary (warning if done wrong it can create a shock or fire hazard consult with a authorized service center before doing)

Sony double cassette deck - line fuse installation - soldering,

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