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Re: HP8920B Blowing Fuse


 

This morning, I tried running it using a DC power supply and that led to it blowing the 15 Amp external fuse for DC power.? As I mentioned yesterday, if you try to use on AC, it blows the external 5 Amp AC fuse.? I have never had the cover off, but that is the decision I need to make now.? Send it off or have a go at myself.? I have a well-equipped lab but am not sure about a schematic for the power supply.? I will need to look for one.? I won't work on much of anything without one.? From what I've seen in response to my inquiries, it seems like Q1 is a possibility.? Will it be a SMD?? I have some SMD rework equipment, but not a ton of experience with it.? I normally work on Ham Radio Equipment, mostly repeaters, not HP test equipment.? Recommendations welcome.?
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Thanks!
Jeff

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