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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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PC power supply
Hello all, I am working a=E7on a 250W SMPS from a PC. The primary part
of the circuit work fine ( or so it seems) but the out put from the secondary is pulsating. I caonnect a small device i made out of 2 small light bulbs (one 5V the other 12V,I use this to quickly check for right voltage output)and i find is pulsating, like on off on off. Can anyone tell me why can this be? I tought of capacitors but they all seem fine. I dont have any equipment to check caps, I used a DMM. Any ideas? Thanks, Gary. |
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