I have a Micor power supply, that stopped working. I removed the power supply, currently no load on the bench.
Back plane fuse - OK F3 - 13.8v fuse - OK,??? 0vac,? Voltage 4.7vdc before F3 F2 - 9.6v fuse - OK,????? 0vac,? Voltage 2.2vdc before F2 F1 10 amp. opens if left powered on. I am able to measure the above voltages before F1 opens. With no AC power, I measured the resistance across TB1, (After temporally shorting to ground to remove any stored voltage, and opening F2, & F3.), 15.3 ohms. There are not many components before F2, and F3. I guess the next components to check are CR1, CR2, CR3, CR4. Although, I have not seen many power supplies with C1 across one of the secondary, like Motorola P.S. It would be best to replace all four. Please send me your input, on?the likely faulty component(s) to check. Thanks for your emails. 73's,?? Jim??? Kh6jkg.
