
105
Maintenance
Fault Finding
02/11/2009 TTP 7020™/TTP 7030™ Technical Manual P1003636-001
Faint print. • The paper used might not meet the paper
specification. See Paper Specification on page 128.
• Clean print head with ethyl or isopropyl alcohol.
• Adjust print contrast, see Print Setup on page 81.
Strange characters or graphics
printed, or any kind of strange
printer behavior.
• Might be caused by erroneous data sent from the
host. Check validity of transferred data.
• If using the serial interface, ensure that all
communications parameters match the PC's serial
port configuration.
Table 8 • Fault Finding (Continued)
Sympton Suggest Actions
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