mp2000 not adding toner

[banginbishop]

Sent to fit a bcu pwb for someone else but suspect it's not the board. Output mode starts the toner motor, dev unit turns, hopper is ok(stripped out & checked) all within pm life. 35 sky shots & mc will not add toner (watched with the cover lifted up) looked in the manual for how it adds toner & the Vt (1.5) should be above the vts to add toner (2.49). Now the Vt increased from 0.43 to its current state after the Sky shots but the copies are washed out.

also throws sc390 I think which is id sensor, which has been replaced with the dev.
any ideas?

[Polarbear]

Re: mp2000 not adding toner

Sent to fit a bcu pwb for someone else but suspect it's not the board. Output mode starts the toner motor, dev unit turns, hopper is ok(stripped out & checked) all within pm life. 35 sky shots & mc will not add toner (watched with the cover lifted up) looked in the manual for how it adds toner & the Vt (1.5) should be above the vts to add toner (2.49). Now the Vt increased from 0.43 to its current state after the Sky shots but the copies are washed out.

also throws sc390 I think which is id sensor, which has been replaced with the dev.
any ideas?

Are your td sensor readings ok? That is the only other item in the loop I can think of? Are you sure that the augers in the dev tank are actually turning (stripped gears)?

[impetus73]

Re: mp2000 not adding toner

If the toner bottle is rotating, and toner is exiting the hopper unit, into the dev unit, then it must be the dev unit that is not rotating, or blocked or broken toner feed coil.

To check the hopper, try placing a paper piece between the hopper and dev, to see if it drops toner onto the paper.

To check the dev unit, take out the PCU unit, mark the gears in the back with a marker, then reinstall the PCU unit. Let the machine try to feed toner, then take the PCU out, and check if the gears moved.

You can also try to manually pour some toner into the dev unit, to see if it changes anything. It might just be too empty, for the toner system to fill up, unless you run the toner feed cycle 10-20 times in a row.

[barratec]

Re: mp2000 not adding toner

Hi! try to check the gears in the dev unit. May be are broken, it happens often on the 2000-2500-3025..and so on series of ricoh machine.

[Gift]

Re: mp2000 not adding toner

Did you interrupt the copy and see if the image is OK on the drum - just to rule out transfer/paper moisture issues?

In case it's pale on the drum:

Try and run main drive and toner motor simultaneously for some seconds in output check to increaser the toner density, then check the quality (add toner SP does not work if the machine thinks the level is OK). Repeat this if neccessary. If the quality looks good, run td sensor initialisation and do a large print job with some coverage afterwards - either the machine will maintain the density or not.

[slimslob]

Re: mp2000 not adding toner

SC 390 is the toner density sensor. It could be a bad sensor or the gears driving the auger gears. All are replaceable. One other thing that I have seen once is the pin on the toner hopper tray that open the toner drop when the tray is inserted can break off. If the machine responds to manual toner add, then it is most likely the TD sensor. Order the TD sensor, manually tone it up to proper quality and set toner control to pixel count until you get the sensor replaced. Don't forget to set back to sensor control after replacing the sensor.

[banginbishop]

Re: mp2000 not adding toner

Well I haven't been back yet as Friday I was working a different area. It's not the dev unit gears or drum - both checked. It's not the hopper - checked.

like I said it doesn't replenish toner - you can force toner or in output mode turn the toner bottle motor but it will not add toner as it should.


Now I had a similar thing on Friday with a mp6500 - I'd sensor covered in toner giving faint copies. Cleaned it & after a bit the mc started to add toner after an ID initialisation.

its possibly a faulty TD sensor or the BCU that governs the add toner?

If I go back or find out ill post back & thanks for the suggestions.

[slimslob]

Re: mp2000 not adding toner

Have you verified that the bottle is actually turning. I have had a number of calls where the bottom of the bottle was not engaging the bottle motor. The coupling on the toner motor can bind and the spring fails to push it against the bottle. Also compare the bottom of the bottle with the coupling. If it is the wrong toner or someone has replaced the motor with one from another model there could be a mismatch.

[Iowatech]

Re: mp2000 not adding toner

Well I haven't been back yet as Friday I was working a different area. It's not the dev unit gears or drum - both checked. It's not the hopper - checked.

like I said it doesn't replenish toner - you can force toner or in output mode turn the toner bottle motor but it will not add toner as it should.


Now I had a similar thing on Friday with a mp6500 - I'd sensor covered in toner giving faint copies. Cleaned it & after a bit the mc started to add toner after an ID initialisation.

its possibly a faulty TD sensor or the BCU that governs the add toner?

If I go back or find out ill post back & thanks for the suggestions.

The chuck that drives the toner bottle is spring loaded. From what I've seen, while the spring in question is pretty strong, occasionally the chuck will get stuck too far to the rear of the machine to drive the bottle. At least on older machines, anyway.
Something to think about, as I had kind of a "bang head on wall" experience until I figured that out back in the day.
Also, another suggestion from the days of yore, make sure you've actually got the right toner bottle. If you have the wrong bottle, the chuck and bottle won't mate correctly, and will cause a problem extremely similar to the one you are now experiencing.

[slimslob]

Re: mp2000 not adding toner

Have you verified that the bottle is actually turning. I have had a number of calls where the bottom of the bottle was not engaging the bottle motor. The coupling on the toner motor can bind and the spring fails to push it against the bottle. Also compare the bottom of the bottle with the coupling. If it is the wrong toner or someone has replaced the motor with one from another model there could be a mismatch.

The chuck that drives the toner bottle is spring loaded. From what I've seen, while the spring in question is pretty strong, occasionally the chuck will get stuck too far to the rear of the machine to drive the bottle. At least on older machines, anyway.
Something to think about, as I had kind of a "bang head on wall" experience until I figured that out back in the day.
Also, another suggestion from the days of yore, make sure you've actually got the right toner bottle. If you have the wrong bottle, the chuck and bottle won't mate correctly, and will cause a problem extremely similar to the one you are now experiencing.

Well Iowa it looks like we may have both been replying at about the same time.

[banginbishop]

Re: mp2000 not adding toner

Well Iowa it looks like we may have both been replying at about the same time.

I've opened the inner cover to watch the bottle move in output mode & forcing toner brings the copies darker again.

Cant say anymore unless I go back now.

[Cipher]

Re: mp2000 not adding toner

I would take the toner hopper apart to see if the 4 toner mylar scoops are still present / stuck down.

hopper.jpg

[Zaxxon]

Re: mp2000 not adding toner

I would take the toner hopper apart to see if the 4 toner mylar scoops are still present / stuck down.

[ATTACH=CONFIG]29741[/ATTACH]

He said in the first post "hopper is ok(stripped out & checked)"

[Iowatech]

Re: mp2000 not adding toner

Well Iowa it looks like we may have both been replying at about the same time.

OOPS! Sorry!

[bob marley]

Re: mp2000 not adding toner

also throws sc390 I think which is id sensor, which has been replaced with the dev.
any ideas?

SC 390 is TD sensor error .the one which has been replaced maybe different .check part no.