Lexmark 4227-X00 - Manual (Page 34)

Diagnostic Information 2-11
4227-X00
Auto Gap can be set to Off to reduce time-to-print if the printer is
always used with a single type of paper. With Auto Gap Off, the gap
can be set to Manual Position 1 (thinnest paper) to 7 (thickest
paper). With Auto Gap Off, Single Auto Gap has two selections:
•
Fixed - the printhead gap is never changed.
•
Open - the gap is opened when loading forms.
Note: If there is a 63C Auto Gap Error, the gap home sensor did not
detect that the carrier shaft homed, or detected that the carrier shaft
homed at the wrong time.
FRU Action
1 Auto Gap Sensor Inspect the gap home flag on the end of the
carrier shaft and make sure it blocks the sensor
when the gap is at its largest. Power up the
printer and watch the carrier shaft and the gap
home flag. If the shaft rotates before the error
occurs, the sensor may have failed. Perform
the Sensor 2 Test in the Service Menu and test
the gap home sensor.
2 Auto Gap Motor
Gear Train If the carrier shaft does not rotate, look for an
auto gap motor or auto gap gear train problem.
Disconnect CN20 from the main logic board.
Check the resistance of pins:
1 and 5, 2 and 6, 3 and 5, and 4 and 6.
All resistances should be 180 ± 5 ohms .
No pin should have continuity to ground.
If there is no 63C Auto Gap Error but there is a
gap problem (light print or no print, or paper
catching on the printhead or ribbon shield),
enter the user menus to make sure the gap
settings are appropriate for the paper being
used. If Auto Gap is Off, Manual Position 1
should be used only with single-part 16 lb. or
20 lb. forms. Refer the customer to the user's
guide for the appropriate Manual Position
settings.