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  1. #1
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    MP2851 light print jobs and "Add Toner" message

    I'm working on a Ricoh MP 2851 with over 611K copies on it. After replacing the toner cartridge a couple of week ago (according to the end-user), it started producing light copies. I performed an internal test print (I printed out the network specs) and the whole page has grey print vice black. I cleaned the laser glass and performed both a SP2908 (Force Toner Load) and SP2801 (Developer Initialization). Rebooted the copier and now it's stuck in "Add Toner". I check the toner is being delivered to the hopper (some spill on the developer unit), check the shutter door for proper operation (passed) and for clogging (chunks of toner)-none found. Oh and I cleaned the the developer plug and receptacle. The toner bottle is 2/3rd full.

    Any assistance would be deeply appreciated.

  2. #2
    Retired 10,000+ Posts slimslob's Avatar
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    Re: MP2851 light print jobs and "Add Toner" message

    Deja vu. Please refer to the following thread as it is very much the same. The 2550 is the previous model to the 2851 and other than minor electronic changes are exactly the same mechanical engine. Forgot the link.
    Ricoh MP 2550B gray copies & now says add toner all the time
    Last edited by slimslob; 2 Weeks Ago at 06:30 AM.

  3. #3
    Senior Tech 100+ Posts 8T2's Avatar
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    Re: MP2851 light print jobs and "Add Toner" message

    99% chance the Dev unit gears are clogged up with developer and plastic dust. You need to order and replace

    1 x B0393060
    2 x B0393062
    2 x B0393245

    I usually remove some of the developer on these and the MP2501 range because a full bag Dev is just too much for the Dev unit to circulate and then the gears last much longer.

    Sent from my WAS-LX1 using Tapatalk

  4. #4
    Service Manager 5,000+ Posts
    MP2851 light print jobs and "Add Toner" message

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    Re: MP2851 light print jobs and "Add Toner" message

    Quote Originally Posted by rdyjnkns View Post
    I'm working on a Ricoh MP 2851 with over 611K copies on it. After replacing the toner cartridge a couple of week ago (according to the end-user), it started producing light copies. I performed an internal test print (I printed out the network specs) and the whole page has grey print vice black. I cleaned the laser glass and performed both a SP2908 (Force Toner Load) and SP2801 (Developer Initialization). Rebooted the copier and now it's stuck in "Add Toner". I check the toner is being delivered to the hopper (some spill on the developer unit), check the shutter door for proper operation (passed) and for clogging (chunks of toner)-none found. Oh and I cleaned the the developer plug and receptacle. The toner bottle is 2/3rd full.

    Any assistance would be deeply appreciated.

    611k when was the dv last changed?

    Common issue, replace the developer & gears.


    Let us eat, drink, and be merry, because tomorrow we may die!

    For all your firmware & service manual needs please visit us at:

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  5. #5
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    Re: MP2851 light print jobs and "Add Toner" message

    Quote Originally Posted by slimslob View Post
    Deja vu. Please refer to the following thread as it is very much the same. The 2550 is the previous model to the 2851 and other than minor electronic changes are exactly the same mechanical engine. Forgot the link.
    Ricoh MP 2550B gray copies & now says add toner all the time
    Thanks you for your assistance.

  6. #6
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    Re: MP2851 light print jobs and "Add Toner" message

    Quote Originally Posted by 8T2 View Post
    99% chance the Dev unit gears are clogged up with developer and plastic dust. You need to order and replace

    1 x B0393060
    2 x B0393062
    2 x B0393245

    I usually remove some of the developer on these and the MP2501 range because a full bag Dev is just too much for the Dev unit to circulate and then the gears last much longer.

    Sent from my WAS-LX1 using Tapatalk
    Thanks.

  7. #7
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    Re: MP2851 light print jobs and "Add Toner" message

    Quote Originally Posted by copier tech View Post
    611k when was the dv last changed?

    Common issue, replace the developer & gears.


    Correction, the meter on this copier is 118K, not 611K. And this is the first time I have serviced this unit. I didn't see a maintenance card nor did the customer have any records. According to the PM, the developer should be replaced at 120K impressions. And from what I have read, it would be better to replace the developer then rebuild it.

  8. #8
    Senior Tech 100+ Posts 8T2's Avatar
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    Re: MP2851 light print jobs and "Add Toner" message

    Quote Originally Posted by 8T2 View Post
    99% chance the Dev unit gears are clogged up with developer and plastic dust. You need to order and replace

    1 x B0393060
    2 x B0393062
    2 x B0393245

    I usually remove some of the developer on these and the MP2501 range because a full bag Dev is just too much for the Dev unit to circulate and then the gears last much longer.

    Sent from my WAS-LX1 using Tapatalk
    Forgot to add that these damage the big white gear on the main drive gearbox when the Dev unit seizes up so I'd take a main drive ass'y with me just in case.

    Sent from my WAS-LX1 using Tapatalk

  9. #9
    Service Manager 5,000+ Posts
    MP2851 light print jobs and "Add Toner" message

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    Re: MP2851 light print jobs and "Add Toner" message

    Quote Originally Posted by rdyjnkns View Post
    Correction, the meter on this copier is 118K, not 611K. And this is the first time I have serviced this unit. I didn't see a maintenance card nor did the customer have any records. According to the PM, the developer should be replaced at 120K impressions. And from what I have read, it would be better to replace the developer then rebuild it.

    Ricoh design these dev units to be rebuilt.

    You can however order a complete PCDU but you will still need to add the developer.

    Let us eat, drink, and be merry, because tomorrow we may die!

    For all your firmware & service manual needs please visit us at:

    www.copierfirmware.co.uk - www.printerfirmware.co.uk




  10. #10
    Retired 10,000+ Posts slimslob's Avatar
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    Re: MP2851 light print jobs and "Add Toner" message

    Quote Originally Posted by 8T2 View Post
    Forgot to add that these damage the big white gear on the main drive gearbox when the Dev unit seizes up so I'd take a main drive ass'y with me just in case.

    Sent from my WAS-LX1 using Tapatalk
    You mean when the worm gear of the motor spins against it.

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