Avery Dennison 676 - Manual (Page 48)

48 • •• • Maintenance
hands before handling the print head. Oils from your hands can
contaminate the print line and quickly destroy the printing elements.
Print Head Replacement
NEVER REMOVE THE PRINT HEAD FROM THE PRINTER EXCEPT FOR
REPLACEMENT.
TURN OFF THE POWER TO THE PRINTER BEFORE STARTING ANY
ELECTRONIC COMPONENT REPLACEMENT.
NOTE: The Anti-static wrist strap (which must contact the skin and be tight) and
anti-static gloves must be worn at all times when handling a print head to avoid
damaging the print head.
1) Review the Printhead Handling Procedure Sheet packaged with each print head to
determine if any procedures have changed before beginning this procedure.
2) Remove the media and ink from the machine for easy print head removal.
3) Unplug the cables that connect to the print head. Unplug the cable by firmly, but
gently pulling it out.
4) Loosen the two 6-32 screws on the rear of the print head holder and slide the
mounting pins inward.
5) Place your hand (with static gloves on) underneath the print line of the print head
and push up to release the locator pins on the heat sink, while pulling the print
head to the right of the machine. This will remove the print head assembly from
the mount plate. You may need to "help" the print head out by pushing on the
heat sink with your left hand.
6) Remove the two print head mount screws located on the top of the print head with
a Phillips head screwdriver.
7) Remove the old printhead carefully from the heat sink.
8) Place the new print head onto the heat sink. Check to see that the new printhead
sits square on the heat sink and that there is no endplay. If there is endplay, or the
head does not seat properly, the heat sink guide will need adjustment.
9) Replace the two print head mount screws. Be sure that the head is resting flat on
the heat sink before tightening these screws.
10) Replace the print head assembly in the printer, sliding the pins (Paragraph 4) into
the holes in the mount plate. Make sure that the guide pins insert into both the
front and back grooves. Secure the 6-32 screws.
11) Reconnect the print head cable connectors, making sure that the connectors are
seated tightly.
NOTE: If the cable is not connected correctly, the print head will be destroyed when
the machine is powered on. Check to see that the cable is tight by observing
from underneath the print head. The cable’s connectors should be inside of
the connectors located on the print head.
12) Replace the media and ink and double-check your work. Power the machine on
and make sure that no adverse effects are noted.