ML620/ML621 User’s Guide
PROBLEM
CAUSE
SOLUTION
The input application control signal is not
correct.
Print in hex-dump mode and verify the data
content. Make corrections in the application.
The interface cable is not properly
connected.
Reconnect the cable correctly.
Too high or too low TOF
(where printing starts)
The TOF is not correctly selected.
Initialize the printer.
Select correct TOF for cut sheet and
continuous forms.
Select the first-line print position and adjust
the paper top position.
Reselect the margin correctly in the
application.
Too large or small left and/or
right margins.
The left or right margin is not correctly
selected.
Incorrect positions of the Paper Guide or Pin
Tractors. Select and adjust the position again
depending on the paper type.
Reselect the left and right margins correctly
in the application.
When continuous forms are
used, the content of a single
form is printed on two forms.
The paper length selected in the application
does not match the physical paper length.
Match the paper length selected in the
application with the physical paper length in
use.
When cut sheets are used,
the content of a single sheet
is printed on two sheets.
The paper setting selected in the application
does not match the physical paper size.
Match the paper setting selected in the
application with the physical paper in use.
The paper setting does not match the lines
per page automatically detected by the
printer.
Leave enough top and bottom margin in the
application.
Correct the cut sheet LF adjustment.
