MPC 3500 DEAD! only main powe led on

[CableGuy]

There is a bulletin out on this problem. What they have done if beefed up the PSU, as this is a known problem on these models. Consult your RTB's and all shall become clear.....

[denesh]

check the ribbon cable

[TonerMunkeh]

Ribbon cable? Which one?

[denesh]

sorry guy, it was the mpc 2500 that i had that problem with. the ribbon cable runs from the BICU to the IOB

[TonerMunkeh]

You're just trying to confuse me

[denesh]

lol sorry dude

[forpaxe]

sorryto dig upthe topic, it is confirmedthe diagnosis ofPSU?

[sandmanmac]

sorryto dig upthe topic, it is confirmedthe diagnosis ofPSU?

Yes. Wouldn't it be a refreshing change if many of those that came looking for help, would update the thread, and just maybe even show a little appreciation afterwards

[Gift]

yap..

[gasior78]

Hi guys! I've been trying to bring back to life a couple of power supply boards... The old ones I mean - AZ24-0110. I've got three of those with identical fault: machine dead, blowing FU2.

So I put it on my bench a had a closer look. In all cases - main rectifier shorted, dead as a stick, as well as the diode mentioned before (YG963) and one of the PFC's MosFET transistor 2SK2915. So I did change the components and it's no longer blowing the fuse, however I can't get +24V working.. The only voltage looking good is +5V, but it does have a separate switching power supply circuit. No chance to find a schematic diagram as you all probably know...

Just wondering if there's a way to get +24V up and running on a bench, out of the machine? Doesn't it need some "start" signal from the machine's controller by any chance?

Thanks in advance

Kris