Question about Zebra Printer 140-751-00000
The printer does not print. Everything seems to be working properly except the labels come out blank.
I've dealt with Zebra 140's for a lot of years. It's best to start with the easy fixes, so please don't take offense if I ask you to check obvious probelms.
I'm assuming you use a ribbon (as opposed to direct thermal paper). When replacing ribbon, it's easy to slide the spool on facing the wrong way.
Can you verify that the ribbon is loaded with the ink facing down? The back of the ribbon is probably shiny and should face up. The ink side is dull and ink can probably be scraped off by your fingernail. The ribbon on the spindle should unwind clockwise, not counter-clockwise. If you're familiar with cleaning the printhead, this would be a good time; if not skip the cleaning for now to avoid damage.
If the ribbon was loaded OK, the next thing I'd check is the printhead pressure. The are two posts with thumbscrews located above the printhead. The thumbscrews press against springs that in turn apply a small amount of pressure to the printhead. Each post has two thumbsrews that can be tightened toword each other to lock the position. Labels and ribbons can be a little tricky to load, and sometimes these posts can slide to the side by mistake. A good rule of thumb is to position these above the left and right sides of the label. Don't apply too much pressure, or the printhead will wear out faster, and printheads are exensive. If one side prints light and one side dark, give the light side a little more pressure.
If the labels still don't print, turn the printer off and then on (to reset the main board).
I can't remember if the Z140 can print a configuration page or test print if you hold down the Feed button while turning on the power. It's so easy it's worth a try. I know you can print one by navigating through the front panel. If the label doesn't print, it's probably a hardware problem. I've never seen a ribbon cable work loose from a printhead, but if you can find the connector, you can jiggle it a little and press it in to try to reseat the pins.
If the config page prints but labels from your software don't, you could check the darkness setting in you software, and also in the printer driver (right click the printer name, and choose something like Printing Preferences). There's also a darkness setting stored in the printer that can be set through the front panel, but this is often over-ridden by label software.
Hope this helps,
Posted on Oct 02, 2008
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