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2-26 Service Manual
4227-X00
3 Ribbon Motor
Paper Feed Motor
Carrier Motor
Sub Logic Board
4227-200 Carrier
Motor Cooling Fan
Disconnect the carrier motor (CN9 and CN15),
the paper feed motor (CN10), ribbon motor
(CN19) and the (4227-200) carrier motor
cooling fan (CN17) from the main logic board,
and disconnect the power connector CN-1
from the sub logic board. Turn the power on
again. If there is still a power problem, replace
the main logic board.
If the machine posts a different error, one of
theseitemsisshortedandisholdingdownthe
+40 V dc line. Reconnect them one at a time,
turning the printer on in between each
connection.
Replace the item that causes the power failure.
4 Printhead Cables
Printhead
Disconnect the printhead cables from the sub
logic board and turn the printer on. If the power
LED lights correctly only with the printhead
cables disconnected from the sub logic board,
there is a short in the printhead or printhead
cables.
5 Main Logic Board If all the above items have been examined and
there is still a power problem, replace the main
logic board. (Retain the old board for
reinstallation if the problem is not fixed.)
Adjust the
“Bidirectional Print Adjustment”
on page 4-4
and check the “Printhead-to-
Platen Gap Adjustment” on page 4-2
.
FRU Action