Lexmark Z51 Color Jetprinter, Service Manual

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2-8
Service Manual
4098-001
Service Checks
Carrier Transport Service Check
FRU Action
1 System Board Unplug the printer and disconnect the carrier
transport motor connector (J5) from the system
board. Plug in the printer and check for
approxi30 V dc between (J5-1) and
ground at the system board. If the voltage is
incorrect, replace the system board. If the voltage
is correct, check for carrier transport motor pins
shorted to the housing. If a short is detected,
replace the carrier transport motor.
2 Carrier Transport
Motor Check the motor for binds, or loose motor pulley.
A noisy or chattering motor or a motor that fails to
turn can be caused by:
• An open or short in the motor.
• An open or short in the motor driver on the
system board.
• A bind in the carrier transport mechanism.
With the carrier transport motor cable
disconnected from the system board, check for
zero to ten (0 - 10) ohms between pins J5-1 and
J5-2 on the motor. If the readings are incorrect,
replace the motor.
3 Carrier Guide
Shaft Clean the carrier shaft. Lubricate the shaft and the
carrier shaft bearing surfaces with grease (P/N
99A0394)
4 Carrier Transport
Belt
Idler Pulley Parts
Carrier Frame Check for worn, loose or broken parts. Check for
obstructions blocking carrier movement. Lubricate
the carrier to carrier frame engagement with
grease (P/N 99A0394)