Sytech Easy Talk SY-1490 Manual Del Usuario página 21

Check if the LCD contrast is
properly set or battery level
LCD light is dim
is low.
Telephone
Check if the unit is in DND
does not ring.
state.
NOTE: Due to continuous product development, all features and specifications are subject to change without
prior notice.
Adjust LCD contrast, if the LCD is still
dim, replace the batteries.
Reset the DND time to 00-00
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