MAINTENANCE, SERVICE AND FAULT FINDING
4-68 25364 Issue 8 March 2018
Ribbon Creasing Ribbon creasing is generally due to the
ribbon attempting to 'track' across the
print head. The most common causes
are:
Bent ribbon guide pins. This may occur
if the printer is dropped. It is not usually
possible to bend a pin back into
position. Remove and replace the
guide pin.
A bent peel off roller. Remove and
replace the peel bar.
Poor print platen / roller alignment can
in some cases cause ribbon creasing
as the substrate tries to pull the ribbon
across the print head.
Print roller/ platen A damaged print roller will cause print
quality problems. A flat spot on the
roller will appear as a repeated blank
area on the Test pattern.
Encoder Check that the encoder is rotating
freely. When in CM, it will not print
unless the encoder is moving.
Check that the encoder signal is
sending a signal back to the controller.
Ribbon Drive Problems If the print contrast is too high or the
print speed too low, the ribbon can be
weakened and break. This can be
eliminated by reducing the contrast or
increasing the speed.
The ribbon rewind is not taking up the
waste ribbon correctly. Check that
there is no interference between the
accumulated wasted ribbon and any
other part of the printer body. Ensure
that the waste ribbon spool is gripping
the core firmly.
Problem Action
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