114Maintenance Fault Finding

Fault Finding

In connection with service of the printer, it is good practice to remove paper dust and lint from the paper path, cutter and sensor areas. Paper dust, when accumulated, may interfere with printer functions such as optical sensors.

To avoid smudging the paper, do not apply oil on the cutting knife.

Table 7 • Fault Finding

Symptom

Suggested Actions

 

 

Nothing is printed when you press the

• Check that the paper roll is turned the correct way with

feed button in self-test mode, but the

 

thermal sensitive layer facing up.

document is transported, cut and ejected.

• Check that the paper used meets the paper specifications.

 

• Check that the print head cable is fully inserted into the

 

 

connectors at each end.

 

 

Paper jam

• Check that nothing blocks the paper path.

 

• Check that the paper guide is fully seated in the T-hole.

 

• Check that the plastic holders for the presenter rollers are

 

 

fully seated and snapped in.

 

 

Printer does not work at all

• Check that the print head is closed.

 

• Check that power is supplied to the printer.

 

• Check the Status indicator for error codes.

 

 

Self-test prints OK, but the printer works

• Check that both ends of the interface cable are properly

strangely in normal operation.

 

connected.

 

• Application program might be incorrect. Contact system

 

 

manager.

 

 

No cutting

• Check that the connector for the cutting motor is fully seated

 

 

on the control board.

 

 

Bad cutting (uneven top and bottom

• Remove the power to the printer and remove any obstructing

document edges).

 

paper particles in cutter and presenter modules.

 

 

 

Inconsistent cutter operation

•

Check/clean cutter-home sensor.

 

 

 

Paper is fed straight through the printer.

•

Check/clean presenter sensor.

Paper does not loop.

• Check setting of parameter p9.

 

 

Pull detector does not work.

• Clean presenter rollers with isopropyl alcohol.

 

 

Missing print or irregular spots.

• Paper may be too humid. Let it adapt to ambient temperature

 

 

and humidity for approximately 24 hours before use.

 

• The paper used might not meet the paper specification.

 

 

White longitudinal lines in the printout.

• Faulty print head, replace.

 

 

Faint print.

• The paper used might not meet the paper specification.

 

• Clean print head with ethyl or isopropyl alcohol.

 

• Adjust print contrast, see Print Setup on page 85.

 

 

Strange characters or graphics printed, or

• Might be caused by erroneous data sent from the host. Check

any kind of strange printer behavior.

 

validity of transferred data

 

 

 

P1002902-002

TTP 2000 Technical Manual

09/14/2009