Epson TM-T88II Series User manual
How to connect an Epson Serial Printer
Overview
A serial connection is probably the most common type of connection between a POS
computer and the printer. A serial connection involves a pair of wires (transmit and receiver)
along with the status and handshaking wires. The data cable connects the serial port on the
computer to the serial adapter card on the printer. f installing a Serial Buffer , see here..
Required Components
Epson POS Printer with Connect- t serial adapter (UB-S01 or equivalent)
Windows computer with serial port
Epson Printers Covered
TM-T88
TM-T88
TM-T88 V
TM-T88V
TM-U200
TM-U220
TM-U230
TM-U325
TM-U590
TM-U675
TM-H6000
Installing and Setting the Connect-It Serial Adapter
nstall the Connect- t serial adapter into the Epson TM series printer
The adapter can replace the existing adapter and is held in place by 2 screws.
Finding the Right Ca le
The most common problem we've had with serial adapters and printers isn't the printer at all -
it's the cable! There's a wide variety of connection schemes used to connect a serial printer.
The most common is the null modem type connection where the transmit and received lines
are crossed. Epson also recommends crossing the DTR with the DSR and the CTS with the
RTS lines.
Very often the printer is attached using a internally wired adapter which converts the DB-25
connector to a phone type (RJ-11) connector. The connections can be wired inside the
housing for custom wiring options.
Note: The DB-25 cable connector on the printer is a serial connection while
the serial interface connection on the back of most computers is not a DB-25
connector but a DB-9 male. The DB-25 connectors commonly found on the
back of computers is the parallel interface. This is confusing, but it's the way it is.
DB-25 Female (printer connector)
DB-9Male (computer connector)
Epson's recommended serial Connection cabling:
We commonly use the following 'Null Modem' arrangement with good results:
D-Sub 25 (TM) D-Sub 9(PC)
2 TxD connected to 2 RxD
3 RxD connected to 3 TxD
20 DTR connected to 6 DSR
20 DTR connected to 8 CTS
6 DSR connected to 4 DTR
7 GD connected to 5 GD
Tip: f unsure on which cable to use, first try a standard Null Modem cable.
Getting Initial Printer and Connect-it Adapter Settings - the Self Test
Print the initial settings of the serial adapter by running the self test. Run the printer self test
by holding down the feed button while turning on the printer. The printer will print a list of
initial settings including baud rate, data bits, parity, stop bit, flow control (handshaking).
These values will be needed when configuring the serial port in Windows.
Configuring the Computer
Check the POS application to determine what the port settings should be on the computer.
The POS application and the printer must have the same baud rate, data bits, parity, stop bit
for the printer to print legibly. Also the handshaking must be set the same for the printer to
print at all.
You can change the interface settings of the printer using the D P switches on the underside
of the printer. See the support page for the model of printer you are using for specific switch
settings.
Verify the port you are using by checking the port in the Device Manager under the System
applet in the Windows Control Panel.
Installing the Device Drivers for Windows
To obtain the latest Device Drivers from Epson:
1. Download and nstall Epson’s drivers available from www.pos.epson.com
2. Click on TECHNICAL RESOURCES
3. Select the printer model under the menu
4. Click the download drivers on the printer page
5. For detailed installation instructions, click here.
Configuring the Printer in Windows
First off, it should be said that the serial printer is not Windows plug and play compliant. You need to make a
few changes in the printer settings in Windows to get it to work with the serial adapter. Specifically you need to
configure the serial port you are using to connect with the printer.
nstalling the Epson Printer Drivers in Windows
Unpacking the Drivers
After downloading the driver
installer from Epson, the drivers need
to be unpacked before the installer
can run.
The installer walks you through
selecting the model and interface you
are installing drivers for in Windows.
Starting the nstallation
Add the Serial Printer
Press the 'Add' button to add the new
printer to Windows.
Selecting the Printer and the Printer Port
Choose the Epson model of the
printer installed from the pull-down
menu and choose the type of
interface in use (Serial) for the port
type.
nsert the baud, bits, flow control and
parity settings from the printer
obtained in the Self Test, above. Also
select the number of the COM port
on the computer connected to the
printer.
Setting the Port Settings for the printer
nstalling the Driver Files
The installer will summarize the
drivers selected. You can back up and
change the driver here, if necessary.
Completing the Driver nstallation
The drivers will now be installed
with the model and port selected.
This completes the installation of the Epson printer
drivers.
Checking the Driver Installation in Windows
Open the printer in the Windows Printer Folder. Select the Ports Tab. Turn off bidirectional support, if
experiencing problems printing.
You can try selecting the serial port in use (COM4 in the above example).
Press the 'Configure Port' button to open the properties screen.
Enter the same settings as were printed out in the adapter self-test.
We recommend that you run off the 'bidirectional printing' option on the Ports screen.
Installing the Printer Driver in Windows
After installing the drivers, the printer should be visible in the printers folder of the Windows Control Panel.
Testing the Printer
You should now be ready to test the printer by printing some text or by pressing the "Print Test Page" button in
the General Tab of the printer properties.
f the printer fails to print the test page then check:
1. Power cable is installed and the printer is turned on
2. Data cable is installed on the printer and the computer
3. Port settings are set the same on the printer (from the Self Test) and in Windows
4. The COM port selected in Windows is correct
5. The data cable has the right configuration for the printer and computer in use. Using the wrong data
cable is the most common problem with new installations. The printer will fail to print unless the cable
is compatible.
Utilities to Run on the Computer
You can verify connectivity by running the Epson Flash utility.
Epson Flash Utility
The Epson Flash Utility is normally installed along with the Epson printer drives. t is used to upload bitmaps to
Epson printers, but has a simple communication test which can check for basic connectivity between the
computer and the printer. Pressing the "Comm. Test" button on the Setup tab of the utility will give a go/no-go
indication of basic connectivity.
Running the TMNet configuration utility on the Computer
The TMNet network utility is not compatible with the serial interface.
Trou leshooting
Connectivity Pro lems, never printed
The data cable is incorrect. Typically serial printers need to use a Null Modem serial cable. This cable
is not straight through - it crosses transmit and receive lines.
The Epson printer driver has not been installed for the serial adapter and printer in use. Check the cable
is plugged into a serial (COM) port on the computer side. On the computer side this is typically a D-
shaped connector with 9-pins.
The printer or the interface card is defective. Confirm printer operation with self-test. Confirm interface
card by swapping with another interface card or printer.
Prints Gar age
You didn't copy the D P switch serial settings from the old printer to the new printer
The interface settings are not the same on both the printer and computer. Run the printer self test to
show the current settings on the printer. Check the computer side to see that settings are the same.
Settings can be changed on the printer using the D P switches.
The printer selected in the software is not correct or the software doesn't support the printer in use.
No longer prints
The TM printer is turned off. Turn on the TM printer. Confirm the connection of the power supply unit
or the voltage of the commercial power.
The TM printer is offline. Turn the TM printer online.
The ERROR LED of the TM printer is on or flashing. Remove the error cause.
The printing port of the driver on the computer side is not specified correctly. Confirm the driver
setting on the computer side.
The printer is not online in Windows. Check the status of the printer in the Windows Control Panel, the
printer should show status as ready. Tip: try stopping and restarting the Print Spooler from the
Services applet of the Control Panel.
Printing is slow
There are problems with the computer. Printing speed may go down due to problems with the network
system or applications. Run the printer self test to confirm the printer is capable of printing at its
normal speed.
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