Service manual

Service Manual 8-17
FRU Disassembly/Assembly 8
Thermal head
1. Power down the printer and remove the power cord. Remove the top cabinet
panel. Refer to the earlier topic “Printer cabinet panels” on page 8-3. Close
the top cover.
2. Remove the screws securing the thermal head fan and move the fan out of the
way so that you can access the thermal head's guide pin.
3. Remove the E-ring securing the thermal head's guide pin to the thermal head
frame. (Newer Kyocera thermal heads do not use an E-ring. Also, the guide
pin is screwed into the printhead block.)
Note If you replace a thermal head with a Kyocera brand thermal head, cut
out the two white, 0¾ resistors located at the center of the engine
control board. Replace the head lift motor bracket. Ensure that the
engine firmware is S401Y or later. Level “Y” prints out as firmware
level “24” on the inspection/check test pattern.
4. Remove the screw securing the grounding straps to the thermal head lift
motor's frame.
5. Open the top cover. Remove the two springs securing the thermal head (one
at each end) to the thermal head frame.
6. Disconnect the power and data interface wiring harnesses from the thermal
head. Remove the thermal head.
Tools required
#1 POSIDRIV® screwdriver