TDP-643R PLUS BAR CODE PRINTER
SERVICE MANUAL
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5.2 Trouble Shooting
Item
Problems
Solutions
1
Ribbon does not advance.
Check the printing mode setting and
reset the printer.
2
Poor print quality.
Clean the print head.
Adjust the print density setting.
3
Only prints diagonal pattern in the
self-test.
Ribbon and paper are incompatible.
Use a different type of ribbon.
4
Power indicator light does not
illuminate.
Check the connection of serial port
cable.
5
On-line indicator light does not to
illuminate.
Check that power cord is properly
connected.
6
Error indicator remains illuminated.
Press the FEED key. The error
message will be printed out on the print
media or sent out through RS-232 port.
5.3 Self Test and Gap Sensor Calibration
1. Turn off the printer.
2. Press FEED button while turning on the printer. Instantly the red and green
indicators will flash alternately.
Release the button when this happens, wait for 10 seconds, and the printer will
calibrate the label length as well as detect the gap sensor emission strength. If
label gap is not detected within 7 inches, the printer stops feeding labels and the
media is regarded as continuous paper.
5.4 Initialization
1. Turn off the printer.
2. Press FEED button while turning on the printer. Instantly the red and green
indicators will flash alternately.
3. Press FEED button again and printer will be initialized.
Note: When initialization is done, please calibrate the gap sensor again.
