Self-Test; Hexadecimal Dumping - Epson TM-U950 Technical Manual

CONFIDENTIAL
Data receive error
When an error is detected in data received by the printer (parity, framing, or overrun error), the
data is either ignored or replaced to "?", depending on the DIP switch setting.

Self-test

The self-test checks the following items:
Control circuit operation
Printer mechanism operation
Print quality
Control ROM version (on status printout)
DIP switch settings (on status printout)
MICR reader circuit function check (for printers with an MICR reader)
For details about the self-test, please see Self-test in Chapter 4.

Hexadecimal Dumping

Hexadecimal dumping function
This function prints the data transmitted from the host computer in hexadecimal numbers and
in its corresponding characters.
Starting hexadecimal dumping
Open the cover and turn the power on while pressing the RECEIPT FEED button, then close the
cover. The printer first prints "Hexadecimal Dump" on the paper roll and prints the received
print data in hexadecimal numbers and in its corresponding characters.
Notes
If no characters correspond to the data received, the printer prints ".".
During hexadecimal dumping, any commands other than DLE EOT, DLE ENQ, and GS ENQ do
not function.
Ending hexadecimal dumping
Hexadecimal dumping ends by turning the power off or resetting the printer after printing has
finished.
1-32 Features and General Specifications Rev. A