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have you replace the Transfer belt.??? It also has a transfer roller for yellow. (Called First Transfer) since it is transferring yellow off the drum. You have replaced the yellow image unit???? 2nd transfer is to the paper!!!
I have a few questions for you to try and answer.
Firstly have you removed the transfer belt assembly if so have you fitted it correctly, the belt has a silver marker fitted to the underside of the belt for the belt edge sensor to read. Is the sensor window covered with toner? If I'm not mistaken you can move the image units between the Cyan, Magenta and Yellow I you have a service contract you can get replacements for your faulty units. The level of detail you proffer is quite detailed so you must have had your machine in lots of bits, several times. It might be better to get touch with your local dealer and get one of the local Xerox engineers in to sort it for you.
Good luck with the problem.
Try swapping out the yellow imaging unit with another color, such as cyan. Print out several test pages, if it continues to dump yellow toner then it is probably a bad developer. If it changes to cyan then it is a bad image unit. If you need another image unit the part# is 108R00581, you can buy a rebuilt one here to save you money. If you suspect it is a bad developer you may want to take your printer to get repaired because it is not an easy fix. Hope this helps, and thanks for using FixYa!
The toner cartridges for the CL7000 have microchips embedded in them, so the machine knows if it's not a new cartridge. Was the cartridge you put in brand new? (And was it a genuine Ricoh cartridge?)
On those printers, the toner is pumped into a developer system and mixed with the developer before making the image. In the developer unit, the density is checked, so if it's not seeing the right mix there, one of three common problems could be causing this.
The more likely solution is to replace the yellow developer unit, which comes as a whole unit and just slides right in. That will reset your density levels and should correct the "load toner" error.
There is a spring and cushion mechanism that the toner cartridge sits on -- this mechanism can easily be popped out of place and cause problems loading the toner. Take out the yellow toner as well as one of the other colors, and see if the little black circular piece is sitting the same way for both colors. If not, just pop it back into place, using the second color as a guide.
The other likely possibility is that the yellow toner supply tube is clogged, but that doesn't happen very often. To test if it's clogged, take out the yellow toner cartridge and the yellow developer unit and turn the copier off. Use a vacuum to provide suction at one end of the tube (the toner end will be easier) and put your finger on the other end (the developer end) and see if you feel the vacuum's suction. If not, there is probably a clog somewhere in the line.
If there is no clog and you can feel the suction, you may have a bad toner supply motor.
As a side note, if you find the problem and fix it, you might still have to put a new yellow toner cartridge in to get the machine running because it will think the cartridge you already tried is empty.
If you the image is faded and your toner supply is good, the problem is the developer blades in the imaging unit. It sounds like the magenta blade needs to be cleaned. During the normal use of the printer, there is a buildup of toner that sticks on the developer blade. The developer blade meters the amount of toner that gets to the drum that ultimately makes it to the paper. As the toner buildup increases on the blade, less and less toner that gets to the drum cause the image to fade.
To fix this problem you will need to disassemble the imaging unit and clean the blades or buy a new imaging unit. I have clean my blades and I have a document to show you if you are handy.
Your problem is not fully explained above as to which color you are having difficulty with, however, the explanation below will more then likely apply to your issue as well. Simply substitute "yellow" for the color you are having an issue with. This is the explanation I gave to another user who was having problems with "yellow prints lite".
If you let the yellow ( or any other color ) toner get to the point where the toner cartridge was totally empty, there is one thing you can try which may help. From the "menu", select "maintenance", then go to "clean developer" and choose the ( which ever color ran low ). The machine will then churn for a few minutes. What happens is there is a tube that moves the toner from the toner cartridge down to the developer unit ( which is behind the imaging drum). If the toner was allowed to totally run out, there is an area of the tube which may have little or no toner in it. Each time you print, there is a spring auger within the tube that draws the toner to the developer. By running the "clean Developer" it turns the auger and re primes the tube.
If this does not fix the issue, and you have replaced the imaging unit, then the (insert color ) developer is defective and would need to be replaced.
This involves quite a bit of work and is not considered user replaceable.
If you let the yellow toner get to the point where the toner cartridge was totally empty, there is one thing you can try which may help. From the "menu", select "maintenance", then go to "clean developer" and choose the yellow. The machine will then churn for a few minutes. What happens is there is a tube that moves the toner from the toner cartridge down to the developer unit ( which is behind the imaging drum). If the toner was allowed to totally run out, there is an area of the tube which may have little or no toner in it. Each time you print, there is a spring auger within the tube that draws the toner to the developer. By running the "clean Developer" it turns the auger and re primes the tube.
If this does not fix the issue, and you have replaced the imaging unit, then the yellow developer is defective and would need to be replaced. This involves quite a bit of work and is not considered user replaceable.
* The MPEG Playback function works in M. PLAY mode only.
* You can play moving picture images on the Memory Card.
* To hear sound during MPEG4 playback, you must hook up to a PC and listen to the PC's speaker. (You cannot hear it from the speaker on the camcorder or a TV)
1. Set the mode switch to MEMORY CARD position.
2. Set the power switch to PLAYER mode.
3. Press the MENU button and turn the MENU DIAL to highlight MEMORY.
4. Press the ENTER button to enter sub-menu.
5. Use the MENU DIAL to select MPEG4 from the sub-menu. (M. PLAY SELECT)
6. To exit the menu, push the MENU button.
7. Using the (FWD) and (REV) buttons, search for the moving picture that you want to playback.
8. Press the PLAY/STILL button.
The moving pictures recorded on the MEMORY CARD begin playing back.