Epson TM-H6000V Technical Reference Manual page 104

The print color is too light
Cause
The ink ribbon color is too light.
The paper is too thick, or there are too
many sheets of copy paper.
Solution and reference
Replace the ink ribbon.
See "Installing and Replacing the Ribbon Cartridge" on page
and Replacing the Ribbon Cartridge for Endorsement Printing" on page
Check the paper specifications.
See "Paper Specifications" on page
Chapter 6 Troubleshooting
41,
132.
"Installing
43.
6
104