the print head has an expected life time of approximately 350,000 pages (see page counter (pgcnt in print test 3).
print head removal
caution: the print head may be very hot immediately after printing.
1. remove the top cover
2. switch the printer on, lift and remove the top cover. the print head will move to the correct position, aligned with the cut-out in the paper guide plate 3. switch the printer off again
4. remove the ribbon cassette (3)
5. disconnect the print head cable (4)
6. using the supplied tool (7), loosen the two captive screws (6) retaining the print head (5). use the enclosed plastic case as an extension for the socket head cap key
7. remove the print head (5).

print head installation
ensure that the printer is switched off. for print head installation, the carriage should be aligned with the cut-out in the paper guide plate (same position as for removal procedure).
1. hold the print head (5) in its mounting position and press it against its stop in direction of the platen. the two noses (9) of the adjustment guide (8) support this procedure. 2. fasten the captive screws (6):
1 fasten the right screw to its stop
2 tighten the left screw
3 now tighten the right screw
4 put the enclosed plastic case onto the socket head cap key and first tighten the right and then the left screw.
3. reconnect the print head cable (4) and fasten it.
4. mount and close the top cover.
5. switch the printer on, open the top cover after the messageready 4 elq, and insert the ink ribbon cassette.
6. run the menu-function agc adjust with ribbon cassette installed but without any paper inserted in the printer.