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Print Black images with any color piece (ex. page with black text and one red letter in up-right corner) 40-50 pages in one job.
Are you see a double black image?
No: Fuser trouble on high-speed.
Yes: Replace the Drum Unit (Black).
1) Press the asterisk key ' ' on the control panel. 2) Press '2' and '8' on the keypad at the same time. 3) Press the asterisk key ' ' on the control panel.
Then choose COPIER, and FUNCTION, find P-PRINT.
Function P-PRINT,Prints the contents of <ADJUST, OPTION and COUNTER> of service mode. Be sure to execute this mode before replacing the image processor PCB. n Operation 1) Select the item to highlight, and press the OK key. A total of three pages will be delivered. n Source of Paper • If a source is selected on the Basic screen, that source will be used. • If auto paper selection is enabled, the topmost cassette will be used.
Perhaps the CMY color heads need alignment. If you have not already done so, run a head alignment from the driver maintenance section. It will print out a page containing several lines and text, and request you select the closest-aligned images. After this is done, do another image print to check for improvements. Normally, the printer uses the black cartridge for text and the CMY inks for images (even for black on photo and specialty paper). So when you are printing normal text pages on plain paper, only the black ink is used. A good check for this would be to print a normal text page, but select photo paper in the driver to trick the printer into using the CMY inks to make a substitute black text page. If this looks ok, then you are having issues other than cartridge alignment.