Macron MPT-461

[davmax]

Earlier threads pictured Macrons that were pretty ordinary. I have a Macron MPT-461 that is finished very well, internal layout is neat, neat cabling, the heat sinks are gold anodised and both power input and the fan are plugged to the assembly board making it very easy to remove. Very good impression of quality. The caps however are Fuhjyyi at the input and all low ESR are perhaps GL, very hard to decipher, a curly G and a long base to the L that curls up at the end. Sorry no cap shot. I am not messing this unit because it belongs to another. I would suspect the output caps.

[Rainbow]

Re: Macron MPT-461

both power input and the fan are plugged to the assembly board making it very easy to remove

That's common for the "ordinary" Macrons too. And fuse in a holder too.
Too bad that they use bad cap brands.

[electricme]

Re: Macron MPT-461

To davmax,

I have been given the above same model power supply, (thanks for the photos) however I want to fire it up to test the voltage rails, before I connect it to a motherboard.


I have several old HD and CD ROM drives I can connect to it for a load, and several DMMs.

But I need to know which wire ends I need to connect together to get to fireup.

The older ATX power supplies used Green and Black wires.

Which colour wires do I do the same with this power supply, as seen in the above photos.

jim

[370forlife]

Re: Macron MPT-461

Should be the same green and black

[tmwalsh]

Re: Macron MPT-461

I have a Macron 251 labeled gray for the 'on off'.. Oh, just looked at the pictures, and what do you know? They labeled the gray 'PS ON'. Yah think that might be it? I didn't find a green wire on the motherboard connector on mine, so I think it must be the gray wire...
tom

[pedro]

Re: Macron MPT-461

Davmax, you haven't described the symptoms ....

I have four Macron MPT-4012's with identical failure - the pair of ultrafast diodes (UF2007 - 1000V 1A) designed to protect the FETs have gone short. And they are tight under the heatsink assembly (the lower one in your pic) which needs to be removed for access - I can't think of a worse place for service access.

PS how's your FP737S going?

[kc8adu]

Re: Macron MPT-461

Davmax, you haven't described the symptoms ....

I have four Macron MPT-4012's with identical failure - the pair of ultrafast diodes (UF2007 - 1000V 1A) designed to protect the FETs have gone short. And they are tight under the heatsink assembly (the lower one in your pic) which needs to be removed for access - I can't think of a worse place for service access.

on a device that was not made to be serviced this surprises you why?

[ratdude747]

Re: Macron MPT-461

on a device that was not made to be serviced this surprises you why?

they want you to ttrash it and buy another... and another... and the cycle repeats...

a little supply-side economic lesson for you. it sucks.