Lexmark X73 4402-001 - Manual (Page 21)

Diagnostic Information 2-7
4402-001
4 Encoder Strip
Carrier with PCB
Assembly
Check the encoder strip for proper installation.
Also, check it for wear, dirt and grease.
Be sure all printhead connectors are fully seated.
Check the cables for damage.
If the encoder strip and all connections are okay,
but the carrier still slams the side frame, replace
the print engine. Go to the
“Print Engine
Removal” on page 4-11 .
5 Carrier Transport
Belt
Idler Pulley Parts
Carrier Frame Check for worn, loose or broken parts. Check for
obstructions blocking carrier movement.
Check the carrier belt idler pulley mounting screw.
Loosen the screw and allow the tension spring to
take up any slack in the belt. Tighten the screw. If
the pulley mounting bracket has reached the stop,
replace the belt. Go to the
“Belt/Idler Pulley
Assembly (Print Engine) Removal” on
page 4-14
.
Lubricate carrier to carrier frame engagement with
grease P/N 99A0394.
6 Printhead Carrier
Assembly Disconnect the printer and check the carrier
printhead connector (J2). If the connection is
good, remove the printhead carrier and check the
cable connection to the home sensor board. If the
problem remains, replace the system board. Go to
the
“System Board Removal” on page 4-12 .
7 Maintenance
Station A problem with the maintenance station can cause
carrier movement problems at the right margin. Go
to the
“Maintenance Station Removal” on
page 4-14 .
8 Access Cover
Sensor If the carrier does not move toward the cartridge
load position when the access cover is opened,
verify that power is on. If the carrier still does not
move, check connector J9 pin 1 for approximately
5 volts, with the cover closed. If the voltage is
correct, replace the sensor. Go to the
“Access
Cover Sensor Removal” on page 4-6 . If the
voltage is incorrect, replace the system board. Go
to the
“System Board Removal” on page 4-12 .
FRU Action