When the images are laid out on the transfer belt they are not aligned properly. The transfer belt was replaced recently and then it started banding. Now we get banding and the colors are not being laid on top of one another????? It seems like the regestration from the drum units to the belt is off or I am having a drive issue on the belt.
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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!!!
P-6 : Cyan imaging unit failure P - 7:Magenta imaging failure P -8 :Yellow imaging unit failure P -9:Black imaging unit failure Select Imaging Process adjustment - D Max Density and if the setting value is negative readjust. Check the drive transmission portion of the imaging unit and correct as necessary,clean theIDC registration sensor windows if dirty,clean the contact of the imaging unit connector if dirty,check the high voltage connector for proper connection.If necessary change the image unit or the image transfer belt unit. P -21 : Color shift test pattern failure. Wipe clean the surface of the transfer belt with a soft cloth or change the image transfer belt unit if the transfer belt is damaged.
the cause of the problem is ,the transfer belt is not rotating properly ITB rollers must cleaned throroughly (cleaned by isopropyl alcohol) to prevent slippage of transfer belt that causes mis alignment /misregistration of color,but copying BW is ok,In other words ITB unit needs servicing ,Run also gradation adjust QUICK and FULL adjust (for IRC 3200)
Use the menu (on the printer) to print antest page AND a configuration/information page.
Look (critically) at the alignment of the seperate coloure Yellow Magenta Cyan. You will probably find that these are out of aligmnent across the page.
The cause of this, is that the printer can't perform a calibration properly (printer probably takes a long time when calibrating too) and is usually down to failure of one of the sensors on the transfer belt.
Sometimes you can clean these and solve the problem, but often is a failure of the component itself. Thes are NOT available as a spare part, and the repair to correct this would need a replacement transfer belt.
Transfer belt replacement in this printer is quite an involved task, though it is within the capabilities of someone with reasonable mechanical aptitude.
Since you have changed the tone cartridges ...and it still does the same....
the next step is to check the transfer belt..transfer roller(this when hit by laser light stores the image and runs on the powder ink..the parts that have been created by the laser on the transfer belt is where the powder sticks)......remover the transfer belt roller and check to verify that its not worn out..its in the form of plastic paper more like Teflon.....view to see that it doesn't have severe markings...if its marked you will need to change the transfer belt to
If this doesn't fix the problem than you will need to change the laser scanner unit....
so basically its your cartridge...that provides color powder dust for image.... transferbelt...that transfers the image to the paper with the image being created by the laser scanner and the cartridge providing color
the last process is fussing ...heat is used to make stick the powder to the paper..and is done by the fusser unit...
as for your case the image is not either created by the scanner itself in the right manner..or the image is not properly created coz the transfer belt is worn out....
Most of the time when I find this happening on a printer, not just Ricoh's it turns out to be the PCU (photo conductor unit). The color PCU is one unit and the black is a seperate unit. Hope this helps.