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 Post subject: mrt-pro express - fire hazard protection non-circuit.
PostPosted: October 7th, 2015, 4:29 
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Joined: April 22nd, 2010, 16:58
Posts: 28
Location: Irvine, California
Seagates commonly have faulty power protection diodes. I frequently see them with shorted burnt diodes.
If you plug them into a pc it will shutdown the pc because of the sudden power drain.
Thats why I always look at the seagate for burnt diodes first.
The other day I plugged a seagate into my pc3k and got no response - I think I got 3 lights and no spin no ID.
So I thought ok maybe my new mrt-pro express will do better.

I connected it up clicked power on and looked for lights - no lights
but out of the corner of my eye I noticed a flickering, a yellow flickering - is that FLAMES !

I pulled the power cord and examined the mrt-pro.
This is the new version board, they eliminated the extra power control board - its all integrated into 1 board now.
Apparently they think they have short-circuit protection in there - guess they never tested it.
I just tested it for them - it doesn't work.
The board still kinda works it just cant control power on that port.
I dont understand why they dont just run a small cable to a pc-power-supply and remotely turn it off and on.
That would protect the mrt board, and if there is damage then its only a pc-power-supply.
They are easy to replace and can handle abuse.
And lucky me it happens the first day of their 6 day holiday.

Heres a picture of the damage.
So beware.


Attachments:
mrtpro_fried.png
mrtpro_fried.png [ 162.22 KiB | Viewed 4372 times ]
capture_001_07102015_010830_449.jpg
capture_001_07102015_010830_449.jpg [ 94.51 KiB | Viewed 4372 times ]

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 Post subject: Re: mrt-pro express - fire hazard protection non-circuit.
PostPosted: October 7th, 2015, 5:27 
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Joined: August 19th, 2007, 17:30
Posts: 1915
Location: In your hard drive.
I have to hand it to MRT, that looks exactly like a reverse engineered PC3000 PCI-E RED card.

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 Post subject: Re: mrt-pro express - fire hazard protection non-circuit.
PostPosted: October 7th, 2015, 17:56 
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Joined: September 8th, 2009, 18:21
Posts: 12587
Location: Australia
drdoc wrote:
Seagates commonly have faulty power protection diodes. I frequently see them with shorted burnt diodes.
If you plug them into a pc it will shutdown the pc because of the sudden power drain.
Thats why I always look at the seagate for burnt diodes first.
The other day I plugged a seagate into my pc3k and got no response - I think I got 3 lights and no spin no ID.

Which model?

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 Post subject: Re: mrt-pro express - fire hazard protection non-circuit.
PostPosted: October 12th, 2015, 3:00 
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Joined: October 11th, 2015, 14:30
Posts: 1
Location: spain
I didn't hear about this kind of problem before. I am also using the seagate.
I want to ask that what kind of protection circuit it consist i mean the specifications of the full protection circuit?
Also how we could resolve this and is there any another alternate circuit instead of this one?


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 Post subject: Re: mrt-pro express - fire hazard protection non-circuit.
PostPosted: October 12th, 2015, 16:04 
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Joined: December 19th, 2006, 8:49
Posts: 10828
Location: Portugal
DixMohr wrote:
I didn't hear about this kind of problem before. I am also using the seagate.
I want to ask that what kind of protection circuit it consist i mean the specifications of the full protection circuit?
Also how we could resolve this and is there any another alternate circuit instead of this one?


1 - Check the PCB with multimeter first to make sure it's not shorted. Just measure the power line on the pcb and make sure that 5v and 12v are not shorted to ground.

2 - Get a good stable decent quality pc atx power supply and on the big plug that you stuck on the motherboard just shunt the green (ps_on) (14 pin) and any black wire on it. This will make the power supply run without any signal from motherboard and without anything else attached.

3 - Plug the drive to that independent power supply and if the PCB starts to smoke (like for instance something is wrong and the drive gets damaged even if it wasn't shorted to start with) do not plug it to the MRT, PC-3000, HRT, whatever.

It'ss STUPID to plug a drive that you don't know nothing about directly to your 3000 $$$ tool !!!!

Remember it can start burning or just it might have a problem that might damaged the card of your tool. It doesn't even have to be a shorted TVS/diode.

Also why would you want to plug a drive that is producing stickion sound for instance to the firmware tool ?

Plugging the drive to the power supply alone should allways be a step to be done prior to connect it to the tool, if for nothing else to have a better idea about the sound that it make, if it spins at all, etc ...

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 Post subject: Re: mrt-pro express - fire hazard protection non-circuit.
PostPosted: October 12th, 2015, 17:00 
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Joined: September 8th, 2009, 18:21
Posts: 12587
Location: Australia
DixMohr wrote:
I didn't hear about this kind of problem before. I am also using the seagate.

It is not a Seagate problem.
DixMohr wrote:
I want to ask that what kind of protection circuit it consist i mean the specifications of the full protection circuit?

Do you have an MRT card? If so, show me a detailed photo of the relevant section(s) and I'll work it out for you.
DixMohr wrote:
Also how we could resolve this and is there any another alternate circuit instead of this one?

There are probably hundreds of alternatives, but we can't get started until we understand the existing circuit. Do you have any electronics knowledge?

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