Specifications

Confidential
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64
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65
TM-U590 series
Specification
(STANDARD)
3.7.3 Data Receive Error
If one of the following errors occurs during serial interface communication, the printer prints "?" or
ignores the data, depending on the setting of DIP switch 1-1.
• Parity error
• Framing error
• Overrun error
3.8 Paper Sensors
The printer has two paper sensors as follows:
• TOF (Top of Form) sensor
• BOF (Bottom of Form) sensor
3.8.1 Sensors and LED Indicators
1) TOF sensor
The slip insertion sensor is located in the slip paper path and detects the presence of slip
paper in the paper path. The SLIP LED indicator lights accordingly.
2) BOF sensor
The slip ejection sensor is located in the slip entrance and detects whether the paper is set
correctly and whether it is removed or not. The printer does not proceed to the next operation
until the paper has been removed. (The SLIP LED indicator continues blinking.)
3.8.2 Sensors and Printing
When the printer detects a paper near-end, it either stops or continues printing depending on the
ESC c 4 setting. The corresponding sensors are as follows:
• BOF sensor
• TOF sensor
When the BOF sensor is selected for printing stop, the BOF sensor detects a paper-end and the
printer prints data up to the end of the printable area, ejects the slip when all the next print data are
transmitted, and then waits for the slip to be removed. After the slip is removed, the printer enters
the paper insertion waiting state.