Question about Televison & Video
I have a small switching power supply in a able box rg2000 and I have replaced defective capacitors which had high internal resistance. I got the supply up and running but found that when checking for ripple output when I put my scope ground on the chassis the power fuse blows. I find that the neutral has about 50 volts AC to AC to ground and the Hot (black wire) has about 60 Volts AC to an external ground. The metal Chassis should not be hot under normal conditions. Unit has a polarized 2 prong plug and house outlets all check proper for hot and neutral and ground as does my HP Scope. What do I check next? Thanks Art wa0njr
Check around your diodes near the voltage regulation area for either a very bad diode or a direct short sometimes its near the resistor pack and very hard to see. But if it were me I would just change out the power supply and be done with it.
Posted on Sep 09, 2009
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Posted on Jan 02, 2017
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