Interface Selection; Operation With The Top Cover Removed; Service Menu - Lexmark 4227 - Forms Printer B/W Dot-matrix Service Manual

4227-300

Interface selection

Serial or parallel attachment can be selected from the User Menu
under Interface Options. If serial attachment is selected, RS-232 or
RS-422 can be selected with the switch that is accessible through
the rear cover. Serial attachment parameters are set in the Interface
Options menu.

Operation with the top cover removed

After you remove the top cover, the printer can be operated for
service purposes by positioning the cover near the main logic board
and reconnecting the operator panel cable. The ribbon cover must
be in place on the top cover. Or, you can remove the operator panel
and cable, jumper the two pins of the ribbon cover sensor connector
CN1 together on the back of the panel, and reconnect the operator
panel flex cable to the main logic board.
Note: Printing without the top cover affects print quality and may
cause paper jams, since the upper feed rollers on the ribbon cover
do not help restrain and feed paper.

Service Menu

Enter the Service Menu by pressing Menu/Quit during POR.
Release the button when the carrier strikes the left side frame. Exit
the Service Menu by pressing Menu/Quit.
•
Sensor Test 1: Tests PSet, Jam, PE & TOF sensors.
•
Sensor Test 2: Tests Paper Select, Gap Home, and Cover
sensors.
These tests display an underline (_) if the sensor is open or a block
( ) if the sensor is blocked. Use paper, tools, or fingers to block and
unblock the sensors to verify that each is functional. Return to the
Service Menu by pressing Menu/Quit.
Diagnostic aids
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