[Misc] Replace Toner will not clear Lanier LD425c

[Eric.S]

My LD425c is stuck at a "replace toner" (black) message and I cannot get it to clear. Details:
1. Prior toner (generic) was probably not empty when I first got the message. Replaced with genuine toner.
2. Replaced toner worked for about 300 copies, then said replace it. I can feel the weight of toner powder sliding from end to end as I tilt the cartridge, so I know it is not empty.

I have pulled out and re-inserted toner many times.
I can see that the black "drum" is full of toner through its inlet and outlet ports.
The condition of waste tank unknown. I emptied it about a year ago, but did not replace it. (it is not possibly full: It took 5 years to fill first time.)

Sorry if this is a repeated topic. I don't know enough about different Lanier/Ricoh models to recognize if there was an "equivalent" model already discussed.

Any thoughts would be appreciated.

[mikadonovan]

Re: Replace Toner will not clear Lanier LD425c

Sounds like the K toner pump has failed on this old machine. BTW, assured parts availability for this model ended over 2 years ago.

[zed255]

Re: Replace Toner will not clear Lanier LD425c

Same as a Ricoh MP C2500. The toner attraction pump and hose likely need to be replaced for the affected colour. Once they stop working nothing I've ever seen resurrects them. Then keep it off the generic toner, you get best life out of parts with genuine toners.

[copier tech]

Re: Replace Toner will not clear Lanier LD425c

My LD425c is stuck at a "replace toner" (black) message and I cannot get it to clear. Details:
1. Prior toner (generic) was probably not empty when I first got the message. Replaced with genuine toner.
2. Replaced toner worked for about 300 copies, then said replace it. I can feel the weight of toner powder sliding from end to end as I tilt the cartridge, so I know it is not empty.

I have pulled out and re-inserted toner many times.
I can see that the black "drum" is full of toner through its inlet and outlet ports.
The condition of waste tank unknown. I emptied it about a year ago, but did not replace it. (it is not possibly full: It took 5 years to fill first time.)

Sorry if this is a repeated topic. I don't know enough about different Lanier/Ricoh models to recognize if there was an "equivalent" model already discussed.

Any thoughts would be appreciated.

Remove the K toner pump, i've had some success stripping down & cleaning them with alcohol etc.

[Eric.S]

Re: Replace Toner will not clear Lanier LD425c

Judging by the consistency of the responses, I think I have my answer. Thanks to all for the quick response.

[fshead]

Re: Replace Toner will not clear Lanier LD425c

Judging by the consistency of the responses, I think I have my answer. Thanks to all for the quick response.

i think i have some working pumps that i bought by accident if you want.

[fshead]

Re: Replace Toner will not clear Lanier LD425c

[QUOTE=copier tech;1077859]Remove the K toner pump, i've had some success stripping down & cleaning them with alcohol etc.


i rebuilt about 10 of these with new rubber piece and cleaned the clutch after taking apart and had about a 65% success ratio.

[Eric.S]

Re: Replace Toner will not clear Lanier LD425c

Follow-up question:
How does the printer determine/sense that it needs more toner? When I pull out the K drum, it is completely full of toner powder.
Specifically,
1. Could this error also be the result of some sensor malfunction, indicating that the toner cartridge is empty?
2. Is it possible that the passageway from Toner to Drum is clogged (with "generic" toner) and blocking flow of toner?

Thanks.

[Phil B.]

Re: Replace Toner will not clear Lanier LD425c

Follow-up question:
How does the printer determine/sense that it needs more toner? When I pull out the K drum, it is completely full of toner powder.
Specifically,
1. Could this error also be the result of some sensor malfunction, indicating that the toner cartridge is empty?
2. Is it possible that the passageway from Toner to Drum is clogged (with "generic" toner) and blocking flow of toner?

Thanks.

the sensor in the developer unit tells the machine it needs toner.

those sensors have been known to fail when GENERIC toner has been used..
you need to clean out dev.. replace the TDS then put in new OEM dev powder.. run init sequence

be sure you clean out any blockage in toner supply tube.

[slimslob]

Re: Replace Toner will not clear Lanier LD425c

Follow-up question:
How does the printer determine/sense that it needs more toner? When I pull out the K drum, it is completely full of toner powder.
Specifically,
1. Could this error also be the result of some sensor malfunction, indicating that the toner cartridge is empty?
2. Is it possible that the passageway from Toner to Drum is clogged (with "generic" toner) and blocking flow of toner?

Thanks.

By "needs more toner" do you mean that it needs to add more toner to the developer or that the toner cartridge needs to be replaced? The method for each is different. Since this thread has to do with cartridge replacement, I will cover that. There are 2 means of determining if the cartridge needs replacement. The information stored in the RFID chip on the cartridge and in memory. When toner needs to be added to the developer, the chip is read. The information updated and written back to the chip and memory. If when reading the chip it is determined that the is below a specified level a near end condition exists. If there is a misread or the value stored on the chip, a toner end is displayed. There is also a photo sensor on the back of the cartridge that senses if any toner is coming out of the cartridge.

[zed255]

Re: Replace Toner will not clear Lanier LD425c

There is a piezoelectric sensor in the toner nozzle to tell the machine when the bottle is no longer delivering toner. This is used to set the toner near end condition.

Each PCDU has a TD sensor so the machine knows when to run the attraction pump to maintain image quality and detect the toner end.

Are you confusing what you see in the PCDU, which will be developer, with toner? The PDCU will always appear to have a powder in it.

Also, the bottles are chipped. If the machine decides a bottle is empty it won't allow you to try and recover with it in place. A history of six bottles is recorded for each colour.

[Eric.S]

Re: Replace Toner will not clear Lanier LD425c

i think i have some working pumps that i bought by accident if you want.

fshead:

I may need to take you up on that offer to sell me a pump, if you have one, since they are apparently out of production.

I removed and fully cleaned the entire path of toner, from toner cartridge connection, thru hose, and dismantled and wiped interior of the toner pump. Same error message.

Last question:
1. Since all toner was removed from the hose, and it is a long hose, is there an Init procedure that I need to run to fill an empty hose? Normal power up after rebuild did run for a while before stopping on the error (out of toner) message.

[Phil B.]

Re: Replace Toner will not clear Lanier LD425c

fshead:

I may need to take you up on that offer to sell me a pump, if you have one, since they are apparently out of production.

I removed and fully cleaned the entire path of toner, from toner cartridge connection, thru hose, and dismantled and wiped interior of the toner pump. Same error message.

Last question:
1. Since all toner was removed from the hose, and it is a long hose, is there an Init procedure that I need to run to fill an empty hose? Normal power up after rebuild did run for a while before stopping on the error (out of toner) message.

what is the life left of PCDU?

[slimslob]

Re: Replace Toner will not clear Lanier LD425c

fshead:

I may need to take you up on that offer to sell me a pump, if you have one, since they are apparently out of production.

I removed and fully cleaned the entire path of toner, from toner cartridge connection, thru hose, and dismantled and wiped interior of the toner pump. Same error message.

Last question:
1. Since all toner was removed from the hose, and it is a long hose, is there an Init procedure that I need to run to fill an empty hose? Normal power up after rebuild did run for a while before stopping on the error (out of toner) message.

Be aware, those hoses have a Teflon coating on the inside to prevent them from clogging. Once that coating has been damaged say by pinching the hose to dislodge toner or trying to snake them out with a piece of wire they will clog again quickly. For this reason, Ricoh started shipping the pumps with the hose attached.

[GIUBOSS]

Re: Replace Toner will not clear Lanier LD425c

fshead:

I may need to take you up on that offer to sell me a pump, if you have one, since they are apparently out of production.

I removed and fully cleaned the entire path of toner, from toner cartridge connection, thru hose, and dismantled and wiped interior of the toner pump. Same error message.

Last question:
1. Since all toner was removed from the hose, and it is a long hose, is there an Init procedure that I need to run to fill an empty hose? Normal power up after rebuild did run for a while before stopping on the error (out of toner) message.

you can also put a pump of another color better if new, before I revised the old ones and changed the rubber inside but it was time wasted and then lasted less, not convenient