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Lexmark T420
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• Portrait orientation is preferred, especially when printing bar codes.
• Do not use labels that have exposed adhesive.
• For the multipurpose feeder, load labels with the recommended print side face up and the top
edge going in first. For the tray, load labels with the recommended print side face down.
When printing on card stock:
• Set the Paper Type to Card Stock from the printer driver, the Local Printer Setup Utility, or
MarkVision.
• Do not use preprinted card stock manufactured with chemicals that may contaminate the
printer. Preprinting introduces semi-liquid and volatile components into the printer.
• Do not use card stock that is creased. It may cause paper jams.
• We recommend the use of grain short card stock.
• Load card stock with the recommended print side face up and the top edge going in first.
Maintenance Procedures
When any of the following conditions occur:
• After continuously printing approximately 10,000 pages of labels or card stock
• The print cartridge is replaced
• The print quality begins to degrade
We suggest you follow the three cleaning steps below to maintain printer feeding reliability:
1 Print 5 sheets of paper.
2 Wait approximately 5 seconds.
3 Print 5 more sheets of paper.
To maintain printer feeding reliability, repeat this cleaning process every time you replace the print
cartridge, more often with some media. Failure to follow maintenance procedures could cause
jamming, poor print quality, feeding problems, and fuser problems.