MP6000 Density Drops After ~200 Copies

[mrwho]

Re: MP6000 Density Drops After ~200 Copies

Yes indeed... I am just not sure on how to do this without making the bottle 'explode' with toner all over my face? Is there something wrong with those 4 flaps that open and grab the nipple in the bottle or are they just stuck?

Take out the toner bottle and push the small white stub held by a screw on the backside (follow the red curved arrow) so the chuck will pop out (the straight red arrow). If in doubt, post here a photo of the backside of the toner bottle holder.

arrowhopper.jpg

Then put the toner bottle back, and try again.

I've had a couple of customers that knew that trick (they would check the position of the chuck before replacing the toner bottle - and push it from the back if it was stuck on the closed position).

[slimslob]

Re: MP6000 Density Drops After ~200 Copies

Take out the toner bottle and push the small white stub held by a screw on the backside (follow the red curved arrow) so the chuck will pop out (the straight red arrow). If in doubt, post here a photo of the backside of the toner bottle holder.



Then put the toner bottle back, and try again.

I've had a couple of customers that knew that trick (they would check the position of the chuck before replacing the toner bottle - and push it from the back if it was stuck on the closed position).

If the toner chuck is already open, check that the roller on top of the chuck actuator is on the proper side of toner cam and that the cam is not deformed. Check service manual for drawing.

[JonManchester]

Re: MP6000 Density Drops After ~200 Copies

The label on the 841332 toner states to store horizontally which is flat on the ground. All Ricoh toner should be stored this way and never vertical.

[stani]

Re: MP6000 Density Drops After ~200 Copies

if the toner chuck stays closed, open the toner holder 90 grad as described, than close it halfway, about 45 grad (without toner bottle), than open it again to 90 grad. Usually the chuck opens after this.

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[luca72]

Re: MP6000 Density Drops After ~200 Copies

added a couple of teaspoons of toner directly into the toner hopper and voila, the machine was happy again, so obviously the toner end sensor is good.

something's wrong with the toner bottle holder assy as it won't deliver toner to the hopper, any ideas on where to begin? the bottle does rotate but no toner is dispensed.

I've read about several colleagues here on the forum who have had problems with compatible toners, we don't use them, so it's never happened to me, but I would suggest something simple to try.
replace the motor that is under the toner revolver, it is a brush motor, like the one on the web cloth, only a little larger, it could be worn out, and it does not turn well when commanded by the machine, (since it makes small operations ), instead from "force toner supply" it runs because it receives a continuous command, tries to replace it, it is a relatively simple and fast operation.

[orestesp]

Re: MP6000 Density Drops After ~200 Copies

Take out the toner bottle and push the small white stub held by a screw on the backside (follow the red curved arrow) so the chuck will pop out (the straight red arrow). If in doubt, post here a photo of the backside of the toner bottle holder.

[ATTACH=CONFIG]61468[/ATTACH]

Then put the toner bottle back, and try again.

I've had a couple of customers that knew that trick (they would check the position of the chuck before replacing the toner bottle - and push it from the back if it was stuck on the closed position).

If the toner chuck is already open, check that the roller on top of the chuck actuator is on the proper side of toner cam and that the cam is not deformed. Check service manual for drawing.

if the toner chuck stays closed, open the toner holder 90 grad as described, than close it halfway, about 45 grad (without toner bottle), than open it again to 90 grad. Usually the chuck opens after this.

Gesendet von meinem Mi 9 SE mit Tapatalk

I've read about several colleagues here on the forum who have had problems with compatible toners, we don't use them, so it's never happened to me, but I would suggest something simple to try.
replace the motor that is under the toner revolver, it is a brush motor, like the one on the web cloth, only a little larger, it could be worn out, and it does not turn well when commanded by the machine, (since it makes small operations ), instead from "force toner supply" it runs because it receives a continuous command, tries to replace it, it is a relatively simple and fast operation.

Hi guys, some good news.

The mechanism that grabs the nipple on the toner bottle and pulls it open was most likely at fault. I did notice that in the photo I posted it was stuck closed, I did push it in (the white pin with the Philips head screw) and it did open, but for some reason, it wouldn't feed toner to the machine. Anyway, I basically sent the unit to be repaired by a local shop for a good price, I received the unit (basically re manufactured) and installed it today and all is good.

I did notice that pulling the white pin/chuck did feel significantly different than before - anyway yes something was amiss inside this whole assembly.

The only problem now is that process control keeps dragging the density down... the test pattern on the left is after carefully running forced toner supply until I was satisfied with the density (no white spots) - the one on the right is after running automatic adjustment of drum conditions (SP 2-906-001 if I recall correctly - i.e. process control). I did clean the two sensors in the drum unit and brushed off any excess toner around the drum unit and the erasing/quenching lamps. Process control runs for a while (takes a few attemps and overall lasts a handful of minutes to finish) and the density is always a bit low.

I am wondering if this can be caused by the transfer belt unit as someone mentioned earlier... it is the only thing I haven't touched since I got the machine and before I had it it was very poorly maintained as evidenced by the things I saw while taking it apart to do a PM for the first time.

The developer is at ~160k, every part and toner I use is original Ricoh part only the drum is a compatible/generic part.

Is there a way to conclude if the transfer belt is at fault for the bad density? Or should I try re-initializing the TD sensor once the density is at a level I am happy at? Looking forward to your suggestions.

density.jpg

[slimslob]

Re: MP6000 Density Drops After ~200 Copies

Hi guys, some good news.

The mechanism that grabs the nipple on the toner bottle and pulls it open was most likely at fault. I did notice that in the photo I posted it was stuck closed, I did push it in (the white pin with the Philips head screw) and it did open, but for some reason, it wouldn't feed toner to the machine. Anyway, I basically sent the unit to be repaired by a local shop for a good price, I received the unit (basically re manufactured) and installed it today and all is good.

I did notice that pulling the white pin/chuck did feel significantly different than before - anyway yes something was amiss inside this whole assembly.

The only problem now is that process control keeps dragging the density down... the test pattern on the left is after carefully running forced toner supply until I was satisfied with the density (no white spots) - the one on the right is after running automatic adjustment of drum conditions (SP 2-906-001 if I recall correctly - i.e. process control). I did clean the two sensors in the drum unit and brushed off any excess toner around the drum unit and the erasing/quenching lamps. Process control runs for a while (takes a few attemps and overall lasts a handful of minutes to finish) and the density is always a bit low.

I am wondering if this can be caused by the transfer belt unit as someone mentioned earlier... it is the only thing I haven't touched since I got the machine and before I had it it was very poorly maintained as evidenced by the things I saw while taking it apart to do a PM for the first time.

The developer is at ~160k, every part and toner I use is original Ricoh part only the drum is a compatible/generic part.

Is there a way to conclude if the transfer belt is at fault for the bad density? Or should I try re-initializing the TD sensor once the density is at a level I am happy at? Looking forward to your suggestions.

[ATTACH=CONFIG]61516[/ATTACH]

Even at only 160K, after expended under toning the developer is probably depleted.The surfaces the iron particles have gotten too smooth to properly to properly carry the toner.

The ID sensor may also be dirty. Check SP 3001-001. It should first close to the default of 13. If not the ID sensor is dirty. Clean it either with a blower type camera lens brush or a clean soft cotton cloth dampened with water. Anything else can damage the sensor. Run SP 3001-002 to re-calibrate the sensor after cleaning.

[luca72]

Re: MP6000 Density Drops After ~200 Copies

Hi guys, some good news.

The mechanism that grabs the nipple on the toner bottle and pulls it open was most likely at fault. I did notice that in the photo I posted it was stuck closed, I did push it in (the white pin with the Philips head screw) and it did open, but for some reason, it wouldn't feed toner to the machine. Anyway, I basically sent the unit to be repaired by a local shop for a good price, I received the unit (basically re manufactured) and installed it today and all is good.

I did notice that pulling the white pin/chuck did feel significantly different than before - anyway yes something was amiss inside this whole assembly.

The only problem now is that process control keeps dragging the density down... the test pattern on the left is after carefully running forced toner supply until I was satisfied with the density (no white spots) - the one on the right is after running automatic adjustment of drum conditions (SP 2-906-001 if I recall correctly - i.e. process control). I did clean the two sensors in the drum unit and brushed off any excess toner around the drum unit and the erasing/quenching lamps. Process control runs for a while (takes a few attemps and overall lasts a handful of minutes to finish) and the density is always a bit low.

I am wondering if this can be caused by the transfer belt unit as someone mentioned earlier... it is the only thing I haven't touched since I got the machine and before I had it it was very poorly maintained as evidenced by the things I saw while taking it apart to do a PM for the first time.

The developer is at ~160k, every part and toner I use is original Ricoh part only the drum is a compatible/generic part.

Is there a way to conclude if the transfer belt is at fault for the bad density? Or should I try re-initializing the TD sensor once the density is at a level I am happy at? Looking forward to your suggestions.

[ATTACH=CONFIG]61516[/ATTACH]

When you have replaced the developer, you have perfom the developer initialization?

[orestesp]

Re: MP6000 Density Drops After ~200 Copies

Even at only 160K, after expended under toning the developer is probably depleted.The surfaces the iron particles have gotten too smooth to properly to properly carry the toner.

The ID sensor may also be dirty. Check SP 3001-001. It should first close to the default of 13. If not the ID sensor is dirty. Clean it either with a blower type camera lens brush or a clean soft cotton cloth dampened with water. Anything else can damage the sensor. Run SP 3001-002 to re-calibrate the sensor after cleaning.

The problem came up on Friday, the machine has basically stopped working ever since, it was not ran intentionally undertoned. Not sure if it was enough to damage the developer. I did just clean everything around the drum unit (including the ID sensor) but I did not know to run 3001-002 to re-calibrate it, I shall try it tomorrow and re-run process control I suppose. Is it possible that the transfer belt assy needs to be serviced?

When you have replaced the developer, you have perfom the developer initialization?

Yes as per the manual. I also replaced the 4 bushings and cleaned the mag roller gently with a wire brush as one bulletin recommends and it gave me some nice solid blacks I can remember. I really haven't had many problems with this machine IQ wise since I did the PM on it.

[luca72]

Re: MP6000 Density Drops After ~200 Copies

The problem came up on Friday, the machine has basically stopped working ever since, it was not ran intentionally undertoned. Not sure if it was enough to damage the developer. I did just clean everything around the drum unit (including the ID sensor) but I did not know to run 3001-002 to re-calibrate it, I shall try it tomorrow and re-run process control I suppose. Is it possible that the transfer belt assy needs to be serviced?



Yes as per the manual. I also replaced the 4 bushings and cleaned the mag roller gently with a wire brush as one bulletin recommends and it gave me some nice solid blacks I can remember. I really haven't had many problems with this machine IQ wise since I did the PM on it.

Try to vac the Little holes on toner Hooper unit, near above the developer unit, May be are clogged, use a vacum, and a needle
Restore the toner ratio with force toner routine, and re run developer initialization