Question about Dell Printers:Dell MFP Laser Printer 1815dn
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Posted on Jan 02, 2017
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Adjust the Scan setting to the defalult/appropriate resolution. See guidelines below.
300 dpi black-and-white or 200 dpi grayscale or color
Documents of poor quality or that contain small text:
400 dpi black-and-white or 300 dpi grayscale
Photographs and pictures:
100-200 dpi color or 200 dpi grayscale
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Posted on Jul 12, 2011
SOURCE: dell 1815dn - when faxing,
Here is what's causing the problem:
1. Charge - Print Quality (PQ) -- The charge roller evenly distributes a negative charge on the photoconductor (PC) drum. This evenly distributed charge acts as the film that is discharged (exposed) by the laser to create the latent image.
a. Print Quality effected: Faint, Entire Black background, Grey Fog/Haze
b. Parts Involved:
i. Drum -- A drum cartridge is coated with a photoconductive material that allows electricity to pass when exposed to light. As an example of why this can be the failure, if you leave a drum out in light long enough, you will get dark backgrounds or just black pages. However, drums do wear out over time too; specifically the photo material the drum is coated with. As this degrades, more of the positive electricity on the inside of the drum gets through and grabs toner, as if the laser wrote to every square inch of it. A damaged or defective PC drum can cause black streaks/lines, voids, speckles and various other print quality problems.
ii. Charge Roller - Also known as the BCR or Bias Charge Roll. The charge roller pulls double duty. It energizes the outside of the drum with negative energy and as a result it cleans any previous latent images. If the charge roller were failing to energize either due to the HVPS or the charge roller itself, it wouldn't clean any previous unused toner deposits from the last revolution would start to accumulate and appear on paper more and more causing haze. A missing charge roller causes completely black pages.
iii. HVPS - High Voltage Power Supply -- Responsible for charging components such as the inside of the drum, the charge roller, and transfer roller. If the HVPS does not give enough to the charge roller it can fail in erasing the drum, causing entirely Black pages to be printed.
Hope this helps.
Posted on Aug 03, 2011
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