Ricoh mpc 2800 sc672

[johncord]

First we had a laser motor error SC202 and the Copier lcd display light just came black,so we fixed the BICU board fuse & replaced the laser motor and now the LCD LIGHT IS ON but after a couple of second the machine displays please wait and stalls on error CODE SC672 is displayed ,keyboar lcd and green light is on but no button is responsive.We have pulled the 1 stick ram out cleaned contacts, all connectors are well harnessed,Cond C174 (OK) , 24 V on R294, %Volts is there too,noticed green led on board always blinking, any suggestion please (Tested power supply looks OK) thank you

[slimslob]

From Goose's Guide:

Controller to Op Panel comm error - check connection between controller and op panel
Controller to Op Panel comm error - replace controller board
Controller to Op Panel comm error - confirm dip SW #1 is in the OFF position
Controller to Op Panel comm error - update system fw to 1.14.3 or higher & network docbox fw to 1.01 or higher

You may have damaged the BICU trying to replace the "fuse" or you may have failed to reconnect everything you disconnected. There may have also been additional problems with the BICU before you started.

[johncord]

Thanks , as soon after it made an error , the sc202 was not visible as the LCD was not lit (was dark), we replaced the fuse on the board Bicu the display lcd light came on and we could read the error, replacing the mirror motor now we are getting SC 652.checked all connectors to controller all seems ok. OLD mirror motor had 2 components burnt.

[sandmanmac]

The dark LCD with SC202 is a well known error on this series and its predecessor, where the Polygon Motor takes out the BICU. Typically, both should be replaced at the same time.
My guess is that you still have an issue with the BICU .

[johncord]

thanks,i think i better try to find a used bicu card and start from there, what i find strange is that the machine keypad and lcd keypad do not work only displa, display light and green light on top of switch

[slimslob]

thanks,i think i better try to find a used bicu card and start from there, what i find strange is that the machine keypad and lcd keypad do not work only displa, display light and green light on top of switch

That is another symptom of a communication error between the controller, BICU, and the control panel. Before spending money, recheck all connections.

[johncord]

thank you once again, i have checked cables 3 times now all looks in place..

[mga]

Thanks , as soon after it made an error , the sc202 was not visible as the LCD was not lit (was dark), we replaced the fuse on the board Bicu the display lcd light came on and we could read the error, replacing the mirror motor now we are getting SC 652.checked all connectors to controller all seems ok. OLD mirror motor had 2 components burnt.

What fuse did you replace on the BICU?

[johncord]

It is a protective link R294 ,the lcd display lit up replacing this component , all other cap seems ok, what is your point any suggestion .the 24v and 5v are there.
really appreciate, trying to find some boards online for a fair price.

[Phil B.]

thank you once again, i have checked cables 3 times now all looks in place..

LOOKS?

did you disconnect the re-connect just because something LOOKS connected doesn't mean they ARE connected properly.. you COULD have a bent pin in the connector

pull the damn harnesses and reconnect