Hitachi VM-E55A - Manual (Page 6)

For Your Safety
6
MOISTURE
When the camera/recorder is exposed to rapid temperature changes from cold to warm,
drops of moisture can form inside the mechanism. A flashing "DEW" indication in the
viewfinder indicates that moisture has condensed on the recorder mechanism, which
could result in tape damage. Since condensation builds up gradually, the indication
does not appear immediately when condensation starts. When the temperature or
humidity of the room changes abruptly, turn the power on and check that the "DEW"
indication does not appear, then wait for about an hour for safety before using the
camera/recorder. When the "DEW" indication in the viewfinder is flashing the unit will
not operate. When this happens, slide the "EJECT" switch, remove the tape, and wait
for the moisture to dry...the "DEW" indication in the viewfinder will stop flashing.