Techno Line WT 534 Manual De Instrucciones página 16

：The previous reception was successful, but the last reception failed
：Time signal search is set to OFF

At 1:00 /2:00 / 3:00 (AM), the clock automatically carries out the
synchronization procedure with the DCF77 signal to correct any
deviations to the exact time. If this synchronization attempt is
unsuccessful (the radio mast icon disappears from the display), the
system will automatically attempt synchronization at the next full one
hour. This procedure is repeated automatically up to total 5 times.

During DCF77 signal reception, press the "
searching for the time signal.
Notes:

A flashing radio mast icon indicates that the DCF77 signal reception
has started

A continuously displayed radio mast icon indicates that the DCF77
signal was received successfully

We recommend a minimum distance of 2.5 meters to all sources of
interference, such as televisions or computer monitors

Radio reception is weaker in rooms with concrete walls (e.g.: in cellars)
and in offices. In such extreme circumstances, place the system close
to the window.

During the DCF77 reception, only the "SNOOZE" and "
have a function, other button operation have no function. If you want
to carry out other functions of operation, please press the
" " button to exit the DCF77 reception.

During time signal reception, the backlight and projection will be
temporarily turned off. The brightness will be restored after the signal
search is finished.
Manual time setting

Press and hold the" " (SET) button for 2 seconds and the RCC
EN4
" button once to stop
" button