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TTP-248M Bar Code Printer
Service Manual
5.3 Self-test
To initiate the self-test mode, depress the MENU button. Press MENU button to scroll
the cursor to Printer test. Press EXE button to enter the submenu and press MENU
button to “Printer Config”. item. Press EXE button to print printer internal setting. In
self-test, a check pattern is used to check the performance of the print head.
Following the check pattern, the printer prints internal settings as listed below:
1. Printer model and firmware version
2. Check sum
3. Serial port setting
4. Code page setting
5. Country code setting
6. Print speed setting
7. Print density setting
8. Label size setting
9. Gap (Bline) width and offset setting
10. Backing paper transparence
11. File list
12. Memory available
5.4 DRAM Clear
Switch off printer power. Press the PAUSE and FEED button simultaneously then
switching on printer power. Release the button for more than 3 seconds. The printer will
clear the memory and reset the printer.
Be sure to calibrate the gap register with blank label before printing.
5.5 Diagnosis Operation Procedure
When the power is turned on without any button pressed, self diagnosis is performed
automatically to test the available memory. If any error occurs during this period, the ERR
light will flash.
Do the self-test and inspect the test pattern to check if the Print head is available.