DP321 User's Manual
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Chapter 4 Problems and Solutions
4.1 Problems and Solutions
Most problems you may encounter while operating your printer have simple solutions.
You can check the operation of your printer using the self test. See “Running the Self Test” on page 1.6.
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.
Note: Press LOAD/EJECT button and turn on the printer, the printer will run the Chinese self-test.
Press TEAR button and turn on the printer, the printer will run the English self-test.
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, turn off the
printer. Install the paper properly, next, hold down the LF/FF and TEAR buttons while you turn
on the printer. Then send data from your computer. The printer prints all the codes it receives
in hexadecimal format.
4.2 Power Supply
Power is not being supplied normally.
Phenomenon 1: The lights on the control panel do not go on and the printer does not work.
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 is
operating properly.
Phenomenon 2: The lights come on briefly and then go off. The lights stay off even when the
power is turned on again.
Solutions: Check whether the printer’s rating volage is matched with the power cord. If not, unplug the
power cord immediately and contact your dealer or a specified jolimark service center for
advice. Do not plug the power cord to the electrical outlet again.
4.3 Printing
The printer does not print.
Phenomenon 1: The Online light is on but nothing is printed.
Solutions:
1. Check that the Driver is installed properly for your printer, as described on “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 light is off and the power light 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.
Solutions:
1. The ribbon cartridge may not be installed properly. See “Installing the ribbon cartridge”.
2. The ribbon may be worn out. Replace the ribbon.
3. Check whether the gap adjust lever is too high, if so, please set the gap adjust lever to the
corresponding position according to the paper thickness.
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