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Hardware Error: 502 - The printer is stalled. 1 Press Power to turn your printer off. 2 Unplug your printer. 3 Check for paper jams. 4 Plug in your printer. 5 Press Power to turn your printer on.
Cartridge Error: 50C - Your ink cartridge has a short. 1 Press Power to turn your printer off. 2 Unplug your printer. 3 Plug in your printer. 4 Turn your printer on. 5 Uninstall and reinstall the cartridges. NOTE: If this does not resolve the problem replace your cartridges.
Link to your manual:
http://support.dell.com/support/edocs/sy…Please come back and just gave a vote, it will gave me some satisfaction to know am helping some one so I will keep on helping.
All The Best: Pineworks
The 0502 error can be caused by four different issues:
A contaminated encoder strip
An unseated encoder strip
A faulty black/photo cartridge
A faulty color cartridge
If the printer is still under warranty, it is best to replace it, as error 502 is usually recurrent. Otherwise, please follow the link below to the Lexmark website for a detailed troubleshooting guide for error 502:
The encoder strip may have become unseated. please follow the steps given below:
The embedded links in the table lead to specific troubleshooting steps.
1 Turn off the printer and disconnect the power cable from the back of the unit. 2 Open the printer's front cover.
Pinch the top of the carrier belt and gently move the cartridge carrier to the center of the printer.
3 On the back of the cartridge carrier, there is a small slot that the encoder strip fits into. Gently push the encoder strip down and back up to get it into the slot. NOTE: If the strip is completely out of the slot, it may be necessary to move it first forward and then back.
4 Move the cartridge carrier back to the left-hand side of the printer with the carrier belt. 5 Reconnect the power supply and turn the printer back on
If the issue persists after you have attempted the steps with a new color cartridge, continue to Contacting Lexmark.
The "clear tape" that you are playing with is called the "encoder strip." A barcode is etched on it that tells the printer carriage where it is. If you clean this carefully (google encoder strip for best methods) you may be able to get rid of 502 error for a while.
I found this on fixyourownprinter.com after some digging.
Hardware Error 0502 on LCD Display ID:ENUS16536
Check the encoder strip on the printer. (This is a clear strip running the length of the printer, above or behind the cartridge carrier.) Do the following:
1. Switch off the printer using the power button. 2. Disconnect the power cable from the back of the Lexmark X5100 / X6100 Series. 3. Leave the power cable disconnected for 30 seconds. 4. Slide the cartridge carrier to the middle of the printer by taking the top part of the belt and moving it gently to the right. 5. Take out both cartridges. 6. Place an index finger on the encoder strip on either side of the cartridge carrier. 7. On the back of the cartridge carrier, there is a small slot that the encoder strip fits into. Slightly push the encoder strip down and then back up to get it into the slot. 8. Lightly press the strip first to the rear and then forward, if necessary. 9. Clean the encoder strip with a dry tissue. Also clean the contacts of the printer. If this does not clean these parts, a cotton swab with rubbing alcohol on it may be used. 10. Reconnect the power cable and switch the printer on again. 11. Perform the hardware test without cartridges first and then with both cartridges.* 12. Make a standalone copy. 13. If the copy is satisfactory, repeat the test once to confirm that the error is gone.
That's the best I can give you. Quite sorry if it doesn't work.
Turn the printer upside down and see if anything falls out. Look inside as well. Maybe something is askew in there. Go the the manufacturer's website to their Support section. Email them or do a live chat. I just typed "hardware eror 502" and found a lot of answers. You might even type the manufacturer's name with just "hardware error".