I have the same problem with my M4. I sent e-mails to Mini-Box and finally received a reply. I've posted my e-mail and their reply below. and if I've done it right the new firmware should also be attached. I haven't used the new firmware because I found ways around the problem before they responded, but the M4 working correctly would definitely have been best.
Originally Posted by timmay33
(e-mail from Mini-box 5/18/2011)
Thank you for contacting us and your interest in our products! We are sorry for the late reply. Have you tested another timing mode and see if you can change the thump timeout? Can you please reset the power supply? Just in case, i have attached the latest firmware for the M4-ATX power supply. Looking forward for your reply.
On Thu, 28 Apr 2011, xxxxxxxxxxxx wrote:
> Hello, I've been using an M4-ATX for over a year and have always had a
> problem with the timing of the anti-thump feature. I sent an e-mail
> last year but never received a response. I'm hoping you may have a solution now.
> The problem is, I'm not able to change the timing for the thump timeout.
> When the ignition is turned on the anti-thump signal is sent at 3
> seconds, then the PC is turned on at 5 seconds and I get a loud thump
> through the amplifier. The configuration software appears to be
> working because the values I enter for the delay stay in its
> configuration even after shutdown and I can also see the voltage and
> temperature readings in real-time. I've tried numerous values for the delay without any effect on the actual timing.
> I've also tried setting the value and then removing power without any
> success. I have the 2.1 version of the firmware. Is there anything I
> can do to make the anti-thump delay change?
Originally Posted by RonsRed88
sorry to bring this up again, but have they ever told you HOW to upgrade the firmware???
I'm still having some trouble with the anti-thump function and I'd like to at least try upgrading the firmware..
send them an e-mail but don't expect a quick responce.
Originally Posted by sanscorp
Originally Posted by Enforcer
****e, not simply done then... not even the latest firmware is posted on the mini-box site.
Allready have 2.1 but I see that 2.4 has been posted here.
maybe... some day..
for now I had to reset to factory default 10 times via jumper and SW and the finally it went back to FD.
The thump timer still doesn't work, will need to buy some timer relays or something.
still think it's way to buggy for over 100 bucks worth of hw.
I had another member do mine for me.
But he is in the UK and it was along time ago.
Maybe someone who has already got the lead and programmer can offer to do it for you.
Also there was a user who was doing reprogramming of the M2-ATX chip, he might have the equipment to do the M4-ATX as well
well, in the meantime I searched what the components would cost me:
I ordered all components double and I'm stuck at 3 euro's of the minimum 5 :)
So I'll just go on with this, Don't really understand the schematic that well but will ask that later.