Nintendo Super System problems

YieArKade

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The 1 amp fuse from the power supply to the iso transformer keeps blowing out.

Could this be a bad iso, or bad power supply? Everything comes on (speakers, pcb, led-buttons, marquee) when I power up the cab. No neck-glow on the monitor.

The iso is 120v with 4 connections: 120v primary, 60hz, 120v secondary, and 1 amp. How can I test the iso or the voltage from the power supply? I haven't done this before.

EDIT: It was the chassis that was causing the problem. It's up and running now!
 
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