Teac US-1641 - Manual (Page 7)

IMPORTANT SAFETY INSTRUCTIONS
TASCAM US-1641
1 – Introduction
TASCAM US-1641
Beware of condensation
If the unit is moved from a cold to a warm place, or used
after a sudden temperature change, there is a danger of
condensation; vapor in the air could condense on the internal mechanism, making correct operation impossible.
To prevent this, or if this occurs, let the player sit for one or
two hours at the new room temperature before using.