Technical information

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drops onto the page). However, in most of these cases you would get either a PRINTHEAD failed/error
type message or you would observe unrecoverable poor print quality. How the Printhead Works:
http://inkjet411.com/?page_id=2054
For any additional questions please contact us directly: [e-mail]
-Thank you
HP OFFICEJET PRO Kxxx/Lxxx (HP 88s) – POOR PRINT QUALITY / IMPROPER OR MISSING COLORS
Regarding your recent inquiry about the HP88 poor print quality problems ("pink color output"), it
sounds like the Cyan/Magenta OR Yellow/Black PRINTHEAD is causing the problem or there are air
bubbles in the ink lines/PRINTHEAD assembly. We suggest you perform the following:
1. Activate a 'Clean Printhead' routine, 2 times, from your TOOLS/MAINTENANCE menu, to see if this
corrects the problem. This action will perform a printhead prime and try to re -establish proper internal
pressures.
2. To verify the lines are clear and working correctly, print the “INK RECOVERY TEST PRINT” from our
Test Prints page: http://inkjet411.com/?page_id=146
3. Run the self-test print (under maintenance/tools menu), this will verify nozzle performance and that
each color is firing a solid band of color (i.e. you should not see any bands or missing lines in the
pattern). This is also a good test to help isolate which color (or portion of the electronic PRINTHEAD*)
may be causing the issue.
4. It is also possible that either of the PRINTHEADs may have poor connectivity with the rear ele ctrical
pad/interface. It is suggested that you attempt to re-seat (i.e. remove and re-install) either the
Cyan/Magenta or Yellow/Balck PRINTHEAD assembly. HP.com instructions can be found here.
http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&dlc=en&docname=c01289505
5. This could be a PRINTHEAD 'firing' or electronic failure issue (…electronic assembly which performs
the actual 'firing' of drops onto the page)*. However, in most of these cases you would get either a
‘Printhead failed’, ‘Printhead missing, or ‘Replace Printhead’ alert message or you would observe
unrecoverable poor/severe print quality. Refer to video to see how the Printhead works:
http://inkjet411.com/?page_id=2054
6. Check the 'WARRANTY ENDS' date on the PRINTHEADS*. If either PRINTHEAD is expired then it may
need to be replaced: For more information on this please visit:
http://h30434.www3.hp.com/t5/Ink-Toner-Cartridge-Printhead-Issues/Significance-of-quot-Warranty-
ends-quot-date-on-Officejet/td-p/1081607
* The HP 88 ink-series printer models have two electronic PRINTHEADS (each of these electronic devices
are responsible for pulling ink from the ink cartridges and then firing the ink droplets onto the paper) –