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4077-20X, 30X
Transport Service Check
FRU
1
Transport Motor
2
System Board
3
Carrier Guide Rod
4
Transport Belt
Idler Pulley Parts
Carrier Frame
5
Encoder Strip
6
Printhead Cable
Encoder Strip
Encoder Card
System Board
7
Maintenance
Station
Action
Check the motor for binds, or loose motor pulley.
Disconnect the transport motor (J6) from the
system board. Check for 8 to 18 ohms between
pins 2 and 3 on the motor cable. If the reading is
incorrect, replace the motor.
Check for motor pins shorted to the motor housing.
If you find a pin shorted to the housing, replace the
motor. If the failure remains, replace the system
board.
Turn the printer off and disconnect J6 from the
system board. Turn the printer on and check for a
pulse of 6 to 8 V dc between J6-2 and ground as
the printer goes through POST.
Clean the carrier rod.
Lubricate the rod or the carrier rod bearing surface
with grease P/N 1329301.
Check for worn, loose or broken parts. Check for
obstructions blocking carrier movement.
Carrier to carrier frame engagement should be
lubricated with grease P/N 1329301.
Check for wear and dirt.
Be sure connector J4 is fully seated. Check the
cable for damage.
Perform the
"Encoder Sensor Test" on page
you cannot enter the test, replace the system
board.
A problem with the maintenance station can cause
carrier movement problems at the right margin. Go
to the
"Maintenance Station Service Check" on
page
2-7.
Diagnostic Information 2-15
3-1. If
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