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it is a restrict current res , the Res change the volt is r10 r12 ,and i think the problem is relate to the current loop because the volt is accuracy with no load or larger than 20ohm
Quote from: China NewBoy on November 03, 2019, 02:18:48 pmit is a restrict current res , the Res change the volt is r10 r12 ,and i think the problem is relate to the current loop because the volt is accuracy with no load or larger than 20ohmIs there activity at the comparator output pins?
I think R19 should connect to the rail being regulated, 24V.
Quote from: xavier60 on November 03, 2019, 01:22:51 pmI think R19 should connect to the rail being regulated, 24V.I increase the value of R19 to 2.7K and the output volt seems difference.
Quote from: xavier60 on November 03, 2019, 01:22:51 pmI think R19 should connect to the rail being regulated, 24V.I increase the value of R19 to 2.7K and the output volt seems no difference.
thank you , i knew that my sch have the transformer mistake but my PCB doc is not wrong .....just too lazy to correct the sch