Hanmatek HM310T bench PSU - schematics wanted

[Dangerousk]

hey there

I picked up a faulty bench PSU that was being discarded as was faulty. So the internal SMPS has some faults, bad thermistor, Schottky rectifier and Mosfets all blown and I have replacement parts on way. fingers crossed 😀

I am looking for a set of diagrams for the power supply. has EST v1.15 along with 2022 date. Not sure if the EST refers to Edwards or some other manufacturer.

thanks in advance.

D

[sam_sam_sam]

Please post some pictures of the device in question including the pictures of both sides of the circuit board so that we can read the components print and if you can point out the parts that are bad or missing

[Dangerousk]

Hi sam_sam_sam

will get some pics of the device and board and share. Will take a few hours

Cheers

D

[Dangerousk]

Hi

Photos as requested:

Front panel


from the right hand side


the main SMPS board is loose as the heatsink is removed with 3 faulty components...i removed to test a 470uf 50v cap but has tested OK.its removed from near top left of the board on the DC side.

all the issues appear to be on the hot side.

from the rear of the bench supply - 5A slo blo fuse also blown. The USB port is for programming the supply


the business side of the internal SMPS


Notes on the above Photo...
Board is loose as I removed the heat sink to check 2x mosfets and the schottky rectifier - all 3 are blown.

the smps board

the faulty parts on the heat sink are

Q9 & Q10 = cs20200CT MOSFETS
Q8 = 13N50A Schottky Rectifier
NTC1 = NTC20D11 Thermistor

close up - hope it will zoom


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