Question about Apple LaserWriter 12/640 PS Plus Printer
Hi and welcome to FixYa,
Like most laser printer, your particular model requires consistent heat application on the whole sheet for the toner powder to adhere to the blank sheet. Your description indicates 2 possible issues:
Posted on Feb 11, 2009
Make sure the Media Type setting matches the paper or media loaded. Also, the Halftoning and Color Adjustment Mode options may be set incorrectly for your document type.
For vertical banding, rough or grainy images run the Print Head Alignment utility to align the print heads for precise vertical lines. If the image does not contain the colors you expected, the color settings on your application software may need adjustment. Refer to your software documentation for help on adjusting colors.
the print head nozzles may be clogged. From the Utility section found in the apple printer driver, clean the print heads by performing a head cleaning followed by printing a nozzle check pattern. A head cleaning and nozzle check MUST be performed as a cycle. After printing a nozzle check, examine the printed dot pattern. Each staggered horizontal and straight vertical line should be complete, with no gaps in the dot pattern. If there are gaps in the dot pattern, continue with another cycle. Performing up to 6 cleaning cycles is not uncommon if the print heads are severly clogged.
If the nozzle check prints completely, and you're still experiencing a problem, make sure you are using the most current version of the printer driver. You can obtain the latest printer driver from the apple web site. The resolution of your image may also be set too low. Increase the image resolution using your image-editing software, or decrease the size of the image.
Posted on Feb 11, 2009
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Posted on Jan 02, 2017
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