Instruction manual

Rev. A Application Development Information 3-9
TM-T70 Technical Reference Guide
Unrecoverable errors
Normal printer operation is no longer possible when unrecoverable errors occur. The printer
must be repaired.
Note:
When an unrecoverable error occurs, turn off the power supply immediately.
3.4 Sensors
3.4.1 Paper Sensors
The printer has two paper sensors.
3.4.1.1 Roll paper near-end sensor
The roll paper near-end sensor uses the diameter of the roll paper to detect whether the
remaining paper is getting low. This sensor is located inside the roll paper supply unit, and you
can fine-tune the amount of remaining paper detected by this sensor.
Lighting of the PAPER OUT LED in a near-end state does not indicate an error. Regular printing
is possible.
Note:
Detection of the near-end status does not necessarily indicate the complete end of the roll paper. Use the
sensor as an indication of when to replace the roll paper.
By changing the driver setting, a print job can be canceled automatically during the near-end status.
Table 3-14 Unrecoverable errors
Error Error description Error LED flash code Recovery measure
Memory R/W error After R/W checking, the printer
does not work correctly.
Impossible to
recover
High voltage error The power supply voltage is
extremely high.
Impossible to
recover
Low voltage error The power supply voltage is
extremely low.
Impossible to
recover
CPU execution error The CPU is executing an
incorrect address.
Impossible to
recover
UIB Error An abnormal operation occurs
in UIB.
Impossible to
recover
Internal circuit
connection error
Internal circuits are not
connected correctly.
Impossible to
recover
Approx. 160 ms