pro8100 sc621 tcb full

**slot** · 06-10-2018

Has anyone had the PSU C go on a pro as we have ordered one as we get the exact symptom of the blown fuse 2 on the board and no 24/5v output
SC621-00,
SC670-00, Toner
out detects > No
recovery if machine
cycled off/on
Or is it something pulling the voltage down as the fuse is all ok ?

**slimslob** · 06-10-2018

I don't know about Pro8100, but I had paper tray feed motor coil short to frame and pull down the 24v. Any motor or other that is direct connected to voltage and sink to ground to to operate can do the same.

**anothertech** · 06-11-2018

Check underneath right side of tandem tray for bad wire harness rubbing insulation off. Or you can leave right side tandem open and restart machine to see if it goes away. Other than that, start disconnecting everything you can until the fuse stops blowing. Also sometimes the new power supplies come through cracked from poor packaging.

**slimslob** · 06-11-2018

Originally Posted by anothertech

Check underneath right side of tandem tray for bad wire harness rubbing insulation off. Or you can leave right side tandem open and restart machine to see if it goes away. Other than that, start disconnecting everything you can until the fuse stops blowing. Also sometimes the new power supplies come through cracked from poor packaging.

Read his post again. He said it has the same symptom of fuse 2 being blown but the fuse is OK.

**slot** · 06-11-2018

Thanks guys the board is on its way and ricoh have confirmed they have had a few go down will update after we replace board

**slot** · 06-13-2018

bad day at the office fitted board yesterday all worked ok.
today in the afternoon customer call back same problem this machine is being a pain I will look at the tray tomorrow thanks.

**ftq** · 05-03-2019

Originally Posted by slot

bad day at the office fitted board yesterday all worked ok.
today in the afternoon customer call back same problem this machine is being a pain I will look at the tray tomorrow thanks.

Hello, Did you fix the problem? what was it? thank you
I am having same problem now...

**slot** · 05-04-2019

yes we did fix it there are 2 boards on the rear of the controller box that the code in the manual said is the problem is also says to check a fuse 2 on the board we did this and it was ok
what the problem was is a blown fuse on one of the boards you need to check them all they are soldered in .
after we replaced the fuse and got the copier working the second time we removed and checked the feed unit for trapped wires all was ok and we refitted the units and the copier hasn't had a problem in probably 6 months now.

**ftq** · 05-07-2019

Originally Posted by slot

yes we did fix it there are 2 boards on the rear of the controller box that the code in the manual said is the problem is also says to check a fuse 2 on the board we did this and it was ok
what the problem was is a blown fuse on one of the boards you need to check them all they are soldered in .
after we replaced the fuse and got the copier working the second time we removed and checked the feed unit for trapped wires all was ok and we refitted the units and the copier hasn't had a problem in probably 6 months now.

Thank you! i swaped the psu-c from another machine , still same problem,,then found one fuse on AC drive board was blown,which suppose give sc670 instead of sc621 according the manual.. i will replace the fuse and see . Thanks again!

**slot** · 05-16-2019

can you point me in direction of fuse as I have a another one with same fault I have checked I have 240v to the psu c but no 24 out thanks
im about to order puc c this could save me some money