24xx

Carrier Service Check

Note: The Carrier Service Check includes the carrier drive, home position sensor and ribbon feed.

 

FRU

Action

 

 

 

1

Carrier

Verify the carrier motor connector is connected

 

 

to the logic board at CN2. If the carrier motor

 

 

connector is connected properly, check the

 

 

carrier belt and the ribbon cartridge for wear or

 

 

damage. Check the belt and pulley

 

 

engagement.

 

 

Manually move the carrier the full length of the

 

 

carriage to check for binds and to be sure the

 

 

ribbon advances when the carriage moves in

 

 

either direction.

 

 

If the carrier binds check the following:

 

 

• Correct printhead-to-platen gap. Go to

 

 

“Printhead-to-Platen Gap Adjustment”

 

 

on page 4-2.

 

 

• Clean and lubricated carrier shaft.

 

 

• Idler pulley not binding.

 

 

• Ribbon drive rack gear teeth not damaged.

 

 

If the carrier still binds:

 

 

Remove the belt and move the carrier again.

 

 

• If the bind is gone, replace the carrier motor.

 

 

If the bind remains, replace the carrier.

 

 

After replacing the logic board or any parts

 

 

affecting the carrier, perform the bidirectional

 

 

print adjustment. See “Bidirectional Print

 

 

Adjustment” on page 4-4.

 

 

 

2

Home Position

If the carrier moves manually without binding,

 

Sensor

but the home position error still occurs, verify

 

 

that the logic board is receiving +40 V dc on

 

 

pin CN12-1. Check that the 5 V dc home

 

 

position sensor signal is reaching the logic

 

 

board.

 

 

Replace the sensor, or the short flexible cable

 

 

as necessary.

 

 

 

2-16Service Manual

Page 34
Image 34
Lexmark 24XX-100 manual Carrier Service Check, Printhead-to-Platen Gap Adjustment