[Dead] Ricoh MPC4000 Dead screen

[Guest]

Hi Guys

I've got a Ricoh MPC4000 with a dead screen, if you look close there is an image on the screen just not lit up I think it says sc202 but tough to see and couldn't find sc code in the service manual either. I have tried replacing:
Controller
BICU
Main Power
and a complete control panel
none of these have had any effect on the dead scree, any help will be greatly appreciated.

Thanks

[blee]

Re: Ricoh MPC4000 Dead screen

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You need to replace the polygon mirror motor in the Laser Unit Part# AX06 0396. That should take care of it.

[slimslob]

Re: Ricoh MPC4000 Dead screen

This has been covered in other threads. A bad polygon mirror motor can take out the BICU. Replace the polygon mirror motor motor and the BICU. Since you have already replaced the BICU, you may have to replace it again. If you can find the other threads on this subject, one of them has a possible component level repair of the BICU.

Blee typed faster than I did.

[Debs1964]

Re: Ricoh MPC4000 Dead screen

As has already been said, polygon mirror motor takes out the BICU, I always replace as a pair, if you replace the BICU before the polygon mirror motor, chances are you have fried a second BICU

[dom8828]

Re: Ricoh MPC4000 Dead screen

Thanks guys, new here so posted before I found previous posts have got a new laser and another bicu so will give it a go, fingers crossed.

[slimslob]

Re: Ricoh MPC4000 Dead screen

Thanks guys, new here so posted before I found previous posts have got a new laser and another bicu so will give it a go, fingers crossed.

Not the laser unit, the polygon mirror motor.

[1nevster]

Re: Ricoh MPC4000 Dead screen

Agreed with all, replace the polygonnal mirror motor and the BICU at the same time. Check your ground wire between the duplex unit and the mc body earth isnt broken after youve done the above, as this will also cause you no end of problems

[sandmanmac]

Re: Ricoh MPC4000 Dead screen

Thanks guys, new here so posted before I found previous posts have got a new laser and another bicu so will give it a go, fingers crossed.

Have a look through this older thread.
Thanks to Polarbear, It may help you revive your BICU
http://www.copytechnet.com/forums/ri...02-solved.html

[slimslob]

Re: Ricoh MPC4000 Dead screen

Have a look through this older thread.
Thanks to Polarbear, It may help you revive your BICU
http://www.copytechnet.com/forums/ri...02-solved.html

I knew it was in a thread somewhere. Just didn't feel like going and finding it.