Advanced Member level 4
Hello again team...am troubleshooting an smps power supply...really running out of options after replacing all semiconductor parts from the primary area. Problem is the same. No output, fan spin intermittently. I saw UC3825 pwm, measured the Vcc read 11Vdc. Then I measured Vref and it read also 11Vdc. The specs shows Vref should be 5.1V. So anyone can share ideas what influences this Vref to reach 11V? Any tips on troubleshooting this smps? Thanks again for continual support.