x-Lab Dot Matrix Printer XDP-321 User's Manual
- 32 -
Chapter 4 Problems and Solutions
You may encounter many problems while operating your printer. Please refer to this chapter for
solution.
You can check the operation of your printer using the self test. Refer to chapter “Self-test”. If the self
test works properly, the problem probably lies in the computer, the software, or the interface cable. If
the self test does not work, contact your dealer or qualified service person for assistance.
If you are an experienced user or a programmer, you can print a hexadecimal dump to isolate
communication problems between the printer and computer. To print a hex dump:
1. Install paper and turn off the printer. Next, hold down the LF/FF and TEAR buttons at the
same time while you turning on the printer.
2. Then send data from your computer. The printer prints all the codes it received in
hexadecimal format.
4.1 Power Supply
Power is not being supplied normally.
Phenomenon 1: The LEDs on the control panel are off, and the printer has no action.
Solutions:
1. Check that the power cord is properly plugged into the electrical outlet.
2. If the electrical outlet is controlled by an outside switch or automatic timer, use another outlet.
3. Plug another electrical device, such as a lamp, into the outlet to determine whether the outlet
operates properly.
Phenomenon 2: The LEDs blink temporarily and then go off. The LEDs stay off even when the
power is turned on again.
Solutions:
Check whether the printer’s rating voltage matches with the power cord. If not, unplug the
power cord immediately and contact your dealer or a specified x-Lab service center for
advice. Do not plug the power cord to the electrical outlet again.
4.2 Printing
The printer does not print.
Phenomenon 1: The Online LED is on but nothing is printed.
Solutions:
1. Check that the Driver is installed properly for your printer, as described on chapter “Installing the
Printer Driver”. Check the driver’s printer settings.
2. Check both ends of the interface cable. Make sure the cable meets both the printer and computer
specifications.
Phenomenon 2: The Online LED is off and the ONLINE LED blinks, the printer beeps once.
Solutions:
The printer may be out of paper. Load paper in the printer.
Phenomenon 3: The printer sounds like it is printing, but nothing is printed.
Note: Press
LOAD/EJECT button while turning on the printer, the printer enters the Chinese
self test mode.
Press the TEAR button while turning on the printer, the printer enters the ASCII self
test mode.