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Electronics => Repair => Topic started by: abyrvalg on January 24, 2022, 04:14:10 pm

Title: Korad KWR103 (TENMA 72-13360) PSU burnt parts identification
Post by: abyrvalg on January 24, 2022, 04:14:10 pm

Hello everyone,

We’ve got a KWR103 burnt presumably from a wrong 110/220V switch setting. Both primary side MOSFETs went short, burning several surrounding SMD resistors so their markings couldn’t be read (R35, R37, R46, R55, see the photo). Perhaps some happier owner could help identifying them?

Thanks in advance.

Title: Re: Korad KWR103 (TENMA 72-13360) PSU burnt parts identification
Post by: fzabkar on January 24, 2022, 04:21:34 pm

That area of the circuit looks like a copy of the area between Q17 and D6.

Title: Re: Korad KWR103 (TENMA 72-13360) PSU burnt parts identification
Post by: abyrvalg on January 27, 2022, 06:38:53 pm

fzabkar, unfortunately that Q17-D6 area is burned too (R46, R55 I’ve mentioned already)  :(