For severe HP OJ 6500/6500A/7000 print
quality/missing color issues, or incorrect color output, there could be an air bubble in the ink
cartridge(s), an air gap between cartridge and PRINTHEAD, or a portion of the
PRINTHEAD is dry (quite common), so you should first perform a CLEAN PRINTHEAD
procedure from your printer control panel. It is first suggested you print the SELF TEST or PRINT QUALITY REPORT (under TOOLS menu) to aid in identifying which color is causing the issue. Check that cartridge or cartridges to ensure they have plenty of ink inside.
NOTE: If one or more the colors were previously dry
fired during printing (i.e. if you continued printing using only a few colors
to one, air may have been accidently ingested into the ink lines between the
cartridge(s) and PRINTHEAD. To recover from this problem, you may have to run
the CLEAN PRINTHEAD procedure 2-3 times.
If a problem persists then it is suggested to
review the steps outlined on the following HP 920 support pages, including
printhead removal/printer cleaning and service station cleaning. It is
suggested you refer to printer manufacturer instructions first as the Inkjet411
procedures are provided for general guidance purposes only. A dirty service
station can cause poor image quality and/or ink cross-contamination between
different colors:
http://inkjet411.retailinkjet.com/?page_id=1495
If the problem still cannot be corrected, then the
PRINTHEAD may be dry and may need to be flushed (i.e. with warm water as it
could have dried out, but this is a function of how much you print). Remove and thoroughly flush all ink ports for
2-3 minutes...thoroughly dry printhead prior to re-installing. Retest. For
complete instructions refer to video here:
http://inkjet411.com/?page_id=2412
Worst case scenario the PRINTHEAD may simply be electrically
damaged or at end-of-life (while Officejet 6500/6500/7000 printer PRINTHEADS
are rated for an estimated 15,000 pages, the average consumer may only see up
to a 10,000 printed page throughput) and may require replacement. A severe
failure of the PRINTHEAD is typically accompanied by error messages such as INCOMPATIBLE
PRINTHEAD, REPLACE PRINTHEAD or INK SYSTEM FAILURE. NOTE: The PRINTHEAD will eventually fail in
time. For more information on the how the PRINTHEAD works, watch the video
here:
http://inkjet411.retailinkjet.com/?page_id=1983
To verify Printhead electrical performance, activate
the Tap 41 diagnostic test, (i.e. Pen Status: Pen OK).....for printer model
instructions please visit:
http://inkjet411.com/?page_id=1813
To solve other HP920 ink-series printer/printing
related issues please visit
http://www.inkjet411.com