HP Officejet 6500 - Manual (Page 236)

5. Remove the printhead by lifting it straight up.
6. Clean the printhead.
There are three areas of the printhead that need to be cleaned: the plastic ramps on
both sides of the ink nozzles, the edge between the nozzles and the electrical
contacts, and the electrical contacts.
1 Plastic ramps on the sides of the nozzles
2 Edge between nozzles and contacts
3 Electrical contacts
CAUTION: Touch the nozzle and the electrical contact areas only with cleaning
materials and not with your finger.
Chapter 9
232 Maintain and troubleshoot