I inherited a Canon C100 copier today. No matter how carefully I adjust the settings, I get dark streaks although the resulting copy is readable and usable for home use. I have replaced the toner cartridge with a brand new one.
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you need to clean the rollers. consult the manual about cleaning the copier. if you don't have a manual, then get some methyl alcohol (any alcohol that evaporates completely will do). use a lint free cloth to rub a small amount of alcohol on all roller surfaces (accessible via pull-down compartments on front and back, usually).
Check the PC drum,if dirty clean.Has toner spilled from the I/C inside of the copier?Clean.Is the PC drum charge voltage terminal in good condition?Check and change if necesary.Is the grid voltage terminal in good condition?Check or change if necessary.Are the fusing rollers dirty with foreign matter?Clean or change.Clean the mirrors,lens and original glass.
Use a flashlight and look closely at the narrow glass next to the platen glass. I usually find a spot of white out on the glass causing the streak. Also a dark spot on the white guide above the glass will cause a streak like you mentioned.
It's never going to be perfect (unless the background is quite light in colour), because the copier basically "sees" the coloured background as "gray", and the darker the background the more "gray" it looks. Try setting the original type to "photo" mode, and then adjusting the exposure a little lighter/darker....that's all you can basically do.
Dark streaks are an indication of "burned" or overheated ink. This will occur when the printer sets for a long period of time and nothing is printed. The problem will usually disappear after 50 pages or so, unless the printhead is damaged.
If the print remains dark, the printhead will need replaced.
(Dark print can also be caused by using Non-Xerox ink)
hi im jules_09.his there any error code?if no error code try to adjust the voltage on the exposure lamp,if that does not work can you send me a sample print at firstname.lastname@example.org so i can see the print .