Specifications

72 DC-200/300 Operation Manual

Figure 7-20. Loading DC-300 Printer

7.1.5 Cleaning the Thermal Printer Head

Your DC-300 comes with a head cleaner kit for use in periodically cleaning the built-in printer’s thermal head.

This helps avoid streaking or blotching when printing labels and reports.

Slide one of the cleaning cloths onto the wedge end of the plastic stick. Remove the cap from the head cleaner

fluid bottle and squeeze a few drops of the cleaning fluid onto the cloth. Wipe the heat element of the thermal

head with the cloth in an up-and-down motion. Add more fluid to the cloth as needed. Sometimes a the residue

will not come off easily even with the cleaning cloth. In these cases, try using the wedge end of the cleaning stick

without a cloth on it to scrape it off. Use the cloth and fluid to clean it up after scraping.

When used up, the cleaning fluid can be replenished by refilling the bottle with 100% isopropyl alcohol. (Use of

any other type of cleaning fluids may damage the print head.) There are also replacement cleaning cloths in the

kit for use when the first one becomes dirty. After cleaning the thermal printer head, replace the cap on the

cleaning fluid squeeze-bottle to prevent evaporation.

7.1.6 Checking or Rezeroing the Thermal Head Usage Counter

The DC-300 maintains a usage counter for the thermal head of the built in printer. It displays the usage in

thousands (incrementing 1 for every 1000 print operations). The counter can be rezeroed after replacement of the

print head in order to track usage on the new one.

1. From the stand-by screen press the

MODE key until the display shows SERVICE MODE. The Z annunciator,

indicating the service mode illuminates. While holding down the

REZERO key, press 0823 to display the

thermal head usage counter.

In the example above, the counter is indicating that 47,000 print operations have taken place.

2. To rezero the counter, press the

CLEAR key followed by the CODE key.

3. Press the

TARE key to return to the service mode. Then press the MODE key twice to return to the

stand-by screen.