MPC 3500 DEAD! only main powe led on

[teebee1234]

OK, so where are you getting the diode from? The last time I checked they were not available through the electronic parts shops and the only guy I found on line was in Tiawan and he would only deal with me if I brought 10,000 of them.

It can be ordered as a part (AZ240150). It's in the tech bulletin on the same post you quoted from iMind.

[Lagonda]

AZ24 0150 comes up in my Ricoh Dealer Parts List as a complete power supply.
I didn't think Ricoh delt in fiddly little parts like a single diode.

[teebee1234]

I double checked and that is the part number for the diode on the 220v PSU. Can you check the cost, it should show a low price for that part (at least in relation to the entire PSU). The part number I have listed for the EU/AA PSU is AZ24 0110 (NA is AZ24 0109). And normally yes, Ricoh wouldn't supply an individual part like this. But being that this part has a high failure, it's a lot cheaper just replace this component using the skills that a field tech has (big enough to get our fat fingers on and soldering 3 points. A smaller component or surface mount would necessitate replacing the entire power supply I'm sure).

[Lagonda]

Hmm, I think there is a bit of a problem with the original Ricoh RTB that iMind quoted.
My Spare Parts Manual tells me that I need a AZ24 0110 PSU cct bd but there is a link to a Mod Bulletin, MB222055, that says that PSU has been up graded and its new number is AZ24 0150. Also the the price list says a AZ24 0150 is worth $600. No mention of a diode anywere.

[neergish]

Im a hunting a couple of the diodes as well. AZ24 0110 has been superceeded by AZ24 0150 (POWER SUPPLY UNIT:494W:EU/AA:A) on our parts list. What does ricoh descibed the diode as, might be able to find it through that.

[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]

Re: MPC 3500 DEAD! only main powe led on

sorryto dig upthe topic, it is confirmedthe diagnosis ofPSU?

[sandmanmac]

Re: MPC 3500 DEAD! only main powe led on

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]

Re: MPC 3500 DEAD! only main powe led on

yap..

[gasior78]

Re: MPC 3500 DEAD! only main powe led on

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