Section 6: Checks and Adjustment Procedures
CG4 Series Service Manual Page 6-7
6.7 PRINT DARKNESS ADJUSTMENT
This feature allows the print darkness to be adjusted, thus affecting the quality and scannability of printed
content. This adjustment must be made through host to printer interface connection, by sending command.
The print darkness can be adjusted within the range of 1 to 5.
1. Prepare the printer to be ready for print out.
Ensure the required media are loaded and the printer is in Online mode.
2. Send the print darkness level command to adjust the print darkness.
Command: <PC>9,b
b: Print darkness level (1 to 5)
Example: To set the print darkness to level 3.
<A>
<PC>9,3
<Z>
3. Print a User Test print to check the print quality.
Refer to
Section 4.3 User Test Print Mode or send the test print command (<TP>,2) to execute User test
print. Ensure that the print out text should not be smudged or blurred. Clean the thermal head and platen
roller to optimize the print quality.
4. If the print quality remains poor after trying the above procedures, replace the thermal head or platen roller.
Refer to
Section 7.1 Print Head Replacement or Section 7.2 Platen Roller Replacement.
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