Epson MR Series Technical Reference Manual page 176

TM print test
Select TM print test from the pull-down menu to conduct a print test of the TM printer.
When the test is successfully completed, "TM print test: done" message appears.
This test is performed regardless of the status of the modem signal.
The status of the modem signal is displayed in COM Ports.
DM display test
Select DM display test from the pull-down menu to conduct a DM display test.
When the test is successfully completed, "DM display test: done" message appears.
This test is performed regardless of the status of the modem signal.
The status of the modem signal is displayed in COM Ports.
This test is only performed for the DM-D connected to the serial port.
Drawer kick-out
Select Drawer kick-out from the pull-down menu to conduct an open test of the drawer.
Note:
Be sure to connect a drawer through a TM or DM.
This test cannot be performed when the TM Status is displayed as Disable or No connection. This test
cannot be performed on multiple drawers.
COM# loop-back
Select COM# loop-back from the pull-down menu to conduct a communications test using the
loop-back connector of the serial port. The test results are displayed in the following manner.
COM# port is disabled
COM# loop-back
test:OK
COM# loop-back
test:Error
The status of the modem signal is displayed in COM Ports.
5-36 BIOS Functions
The designated port is disabled.
The test was completed successfully
An error occurred
COM port loop-back connector
COM ポート ループバック・コネクタ
1 DCD/power
2 RxD
3 TxD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
Rev. I