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4227-X00
FRU/Symptom
3
Auto Gap
4
Printhead Cables
5
Sub Logic Board
6
Ribbon
7
Printhead
8
Main Logic Board
Action
If printhead is firing, manually rotate the carrier
shaft during printing by pushing down on the
auto gap home sensor flag.
If printing starts and is correct, go to the
Gap Service Check" on page 2-10
Inspect for improper connection or damage.
If there is carrier motion but no printhead noise,
and the printhead cables do not appear to be
the problem, replace the sub logic board.
A problem with the ribbon shield can keep the
print wires too far from the page.
Inspect the ribbon shield. When the printer is
Ready with the ribbon installed, make sure the
ribbon shield can float slightly front to back.
The printhead probably is not the problem if
there is no printing.
Check the winding resistances as described
above and look for open circuits or shorts
between neighboring pins.
Do not replace the printhead unless a specific
problem is found.
If no other problem is found, replace the main
logic board, retaining the old board for
reinstallation if the problem is not fixed.
"Bidirectional Print Adjustment" on
Set the
page 4-4
and the
Adjustment" on page 4-2
"Printhead-to-Platen Gap
.
Diagnostic Information
"Auto
.
2-29
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