Datavideo Tally Box TB-20 Quick Start Manual page 4

13. Unplug this product from the wall outlet and refer to qualified
service personnel under the following conditions:
a. When the power cord is damaged or frayed;
b. When liquid has spilled into the unit;
c. When the product has been exposed to rain or water;
d. When the product does not operate normally under normal
operating conditions. Adjust only those controls that are
covered by the operating instructions in this manual; improper
adjustment of other controls may result in damage to the unit
and may often require extensive work by a qualified technician
to restore the unit to normal operation;
e. When the product has been dropped or the cabinet has been
damaged;
f. When the product exhibits a distinct change in performance,
indicating a need for service.
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