Hi guys,
I am working on 12V 30A smps that has only 1V output. I haven't got board's schematic but I found one same like mine( Schematic Link).
Also on this link author says this circuit has the self-starting capability. After I read it, I become suspicious of C10 also.
I attached pictures both front and back.
Please help me with this issue guys.
Thanks.
I am working on 12V 30A smps that has only 1V output. I haven't got board's schematic but I found one same like mine( Schematic Link).
- I measured high voltage capacitors (C2 and C3 on the schematic.) and bridge rectifier. They are working.
- Also checked power switching transistor on board they seem fine. (Q1 and Q4 on the schematic.)
- Checked PWM transistors on board. They also fine. (Q2 and Q3 on the schematic.)
- I measured PWM IC's Vcc pin(pin12) and it is 2.4V.
Also on this link author says this circuit has the self-starting capability. After I read it, I become suspicious of C10 also.
I attached pictures both front and back.
Please help me with this issue guys.
Thanks.
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