Lexmark 4227-X00 - Manual (Page 50)

Diagnostic Information 2-27
4227-X00
Print Quality Service Check
FRU Action
1 Ribbon and Shield Be sure the ribbon is not worn and feeds
smoothly when the knob is turned. Inspect the
ribbon shield for dirt or damage.
2 Ribbon Drive Be sure the ribbon drive post rotates when
printing.
3 Auto Gap
Auto Gap Motor
Bracket
Check the “Printhead-to-Platen Gap
Adjustment” on page 4-2 . If Auto Gap is off,
be sure the manual position setting is
appropriate for the paper used.
If the failure remains, replace the Auto Gap
Motor Bracket.
4 Printhead Cables Inspect both ends of the printhead cables for
proper connection.
5 Carrier Belt
Adjustment Loosen and tighten the tension pulley plate
screws to make sure the carrier belt is tight.
6 Carrier Movement With power off, manually move the carrier from
side to side to inspect for drag or binds.
7 Bidirectional Print
Adjustment Check the “Bidirectional Print Adjustment”
on page 4-4 .
8 Carrier Motor The carrier motor should turn smoothly and
quietly when printing.
9 Paper Feed Gears Inspect the paper feed gears for wear and tear.
10 Paper Feed Motor The paper feed motor should turn smoothly
and quietly when printing.
11 Tractors Inspect the tractors for damage or looseness.
12 Feed Roller
Surfaces Inspect the feed roller surfaces for dirt or wear.