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LiteOn lit on fire in HP Scanjet 5

Power Supply Design and Troubleshooting - Badcaps Forums - www.badcaps.net
So I haven't powered this machine up for some years, but when it powered it off last, there were no problems. Before powering it up, I opened up the machine and blew it out with compressed air. Everything was clean. So I plugged it in on turned it on. BZZZZZZZZ! Turned it off. Opened the machine, pulled the power supply, hooked up the PS to AC with no load. FIRE! Turned it off.

It looks like a diode shorted and burned.

Luckily I have another identical PS that I can identify the parts. So, get new parts and turn it back on? Should I also replace the same part on the non-burned power supply? Do diodes age? I haven't plugged in the other PS just in case.

Burned section:

Date: Jan 12, 2018   


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