Dual 30V/5A lab supply MCP M10-DP-305E equivalent

[shakalnokturn]

I have one of these cheap-built but good by today's standards linear lab supplies.

One output has no regulation can anyone identify clones-of or similar models that I may be able to find a schematic for?

The regulation PCB's are marked "DCPOWRE-1C". (Engineer was dyslexic...)

Thanks!

[Grandchuck]

Maybe this?

https://www.google.com/search?q=hy3005f-3+schematic&rlz=1I7RNQN_enUS491&sxsrf=ALeKk02DFIlJmDDzrkyo2ihQpsdaycqiWg:1582386595493&tbm=isch&source=iu&ictx=1&fir=u_zCmtk897hW4M%253A%252CCZztig4In-B0_M%252C_&vet=1&usg=AI4_-kSP9wyi-uwUwoUgktdCU_1uMAEHQQ&sa=X&ved=2ahUKEwiLuq-3weXnAhVEjK0KHUn3CckQ9QEwAHoECAoQBA#imgrc=u_zCmtk897hW4M:

[shakalnokturn]

Thanks, the HY3005D definitely seems close at a first glance. I'll took into that in more detail later.

[shakalnokturn]

Thanks to Grandchuck for pointing me towards my PS being a not so fantastic Mastech clone.

I found a few crusted and rusted relay switching transistors, the current regulation problem was a defective UA741.

Moderators: Feel free to move from T.E. to repair if more appropriate.

[tautech]

Moderators: Feel free to move from T.E. to repair if more appropriate.

You can Move Topic yourself.
Look bottom left of your page for the link.

[SkyMaster]

The MCP M10-DP-305E and Mastech HY3005F-3 were probably heavily "inspired" by the GW Instek GPS-2303.

 

[issa]

Hello there,
I am new here so please pardon my mistakes, i have the same exact device , can you lease help me find out the values of a few brunet resistors?
either schematics or close ups? please?
the resistors are brunet beyond recognition.

R1, R2, R3, R5 ,R6, on the front control board named MCP-36A

The large green resistors on the back plate.

If there is a schematic i appreciate it.

Last, the main power transistors on the back are expensive and hard to find , is there a viable replacement?

Thank you all in advance,

[shakalnokturn]

One of the schematics (the one with 3 relays and three TO-3 transistors) for the Mastech models has the right values for the power resistors at the rear.
I don't think any of the schematics I saw showed an identical (with optocouplers) control PCB though.

I'll see if I can help for those values.

[shakalnokturn]

Front adjustment PCB:
R1: 1k
R2: 470R
R3: 1k
R5: 470R
R6: 1k

Edit: I won't be trying to help newcomers much longer, I'm under the impression that they mostly loose track of their own requests.

[cripto25]

Hi. Although I am new here, I have been browsing this forum for some time and I have always learned something. on this topic I want to make my contribution.
I have an MCP M10-TP-305E source that stops working when testing a universal brush motor.
I attach photos with the components that I needed to change until I can get it to work again.
Thanks to shakalnokturn for the contribution of the value of the resistances since I do not have the scheme.

[issa]

Thank you, i know its a late reply. but i never did thank you.
so thank you.
 the right side is not working at all. i cannot figuer out why.
i am still lookiong for schematices

[Harry_22]

Hi!

What about the right side?
Could you picture front panel with measurements like at first post.