Question about Apple LaserWriter 12/640 PS Plus Printer

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Hi, I have a Apple Laserwriter 12/660 Colour Laser Printer with a little problem!. The printer was purchased out of town, so was freighted 1000 k's (600 miles) upon my purchase. When I tested the printer out all worked fine except image was not printing 100% - 1/3 of the image was not there and what was left prints 'side-shifted' to the left. I am guessing some form of Optical damage?. Not to sure. The printer is probably past its time, but If it can be fixed reasonably cheap then it might be worth it. Thanking you in advance, Pete

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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:

  • '1/3 of the image was not there' - indicates that possibly the fuser/heater has switched off early;
  • 'prints 'side-shifted' to the left' - tells us that the paper did not travel evenly along the paper path.
Ideas you may want to try/consider:
  • clean the rollers;
  • check for anything not seated right;
  • if your model uses a removable cartridge to hold the toner powder, remove, shake vigorously and re-insert making sure it is seated correctly;
  • follow the paper path. If possible check for clearances between rollers to check if they are even;
  • if the unit is unit, look for any locking tabs, tape or inserts. They are placed to ensure that some of the mechanism do not move while in transit.
Good luck and thank you for using FixYa.

Posted on Feb 11, 2009

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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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