Hi
My first post here. I have for repair one old SMPS 150-200W which had broken caps and PWR trans in LIVE side.
Now it has two trafo 5V/15A ,12V/5A +15V/1,5A -15/1A. it has a LM1723 I think as ref. with an SCR and a "Secret" pottet board with, I think, control circuit.
It do not really startup, pulls .7A @ 90V AC and the SCR and PWR trans gets hot !! So I do not get full mains on it (yet).
Then the output voltages is not right yet but If I pull out the SCR The output voltages aspire and look right but it makes alot buzzing noise.
I do not have any info or schematic on it. So any good ideas are most wellcome.
Here is some pict.
My first post here. I have for repair one old SMPS 150-200W which had broken caps and PWR trans in LIVE side.
Now it has two trafo 5V/15A ,12V/5A +15V/1,5A -15/1A. it has a LM1723 I think as ref. with an SCR and a "Secret" pottet board with, I think, control circuit.
It do not really startup, pulls .7A @ 90V AC and the SCR and PWR trans gets hot !! So I do not get full mains on it (yet).
Then the output voltages is not right yet but If I pull out the SCR The output voltages aspire and look right but it makes alot buzzing noise.
I do not have any info or schematic on it. So any good ideas are most wellcome.
Here is some pict.