35
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2. Environmentally friendly solar technology
Technology that needs no batteries! Light – no matter whether sun-
light or artificial – penetrates the solar or light-transparent watch face.
This transforms the light into electrical energy, which gets saved in a
long-life power store. The power store serves as the source of electricity
for your multi-frequency radio-controlled solar-powered movement
J615.74.
3. Automatic time synchronisation
The automatic time synchronisation process always takes place at
night based on the local time set on your watch:
EU – DCF 77: at c. 2 a.m. and 3 a.m.
JP – JJY40 and JJY60: c. 2 a.m.
US – WWVB: c. 2 a.m.
At the beginning of the synchronisation the LC display switches off
automatically and remains off for the entire duration of synchronisa-
tion (maximum 9 minutes), or until manual abort. The hands remain
still and stay in this position during synchronisation (maximum
9 minutes). Following successful time synchronisation the watch
adjusts to the received time.
Automatic time synchronisation can be aborted by pressing any
button. Following an abort, the time adjusts to the internally-saved
time.
The following special feature is provided for the signal transmitter
WWVB (USA):
The Junghans multi-frequency radio-controlled solar movement
always reads in Pacific Standard Time after successful synchronisa-
tion or following a restart. Due to the non-standardized changeover
from summer time and winter time, as well as different time zones
in the individual states, it is possible for you to manage the summer
time and winter time, and to set the time zones manually (see 6.2).
Any deviations in the setting of the time zone, or summer time or
winter time due to your respective location are retained for the next
synchronisation.
Pressing T1 displays the transmitter received following successful,
automatic time synchronisation. The time signal always changes
the date automatically. In leap years the 29th of February gets auto-
matically taken into account. If none of the attempts at picking up
a signal lead to clear synchronisation, the reception indicator gets
de activated (see section 6). Thanks to the internal time-memory, your
watch will continue to run during any days without time synchro-
nisation with the precision of a quartz watch. The next successful
reception of the time signal leads to synchronisation and the reception
indicator on the LC display becomes activated.
Recommendation: To ensure the best possible conditions for auto
matic reception of the time synchronisation signal, the watch should
not be worn and, if possible, not left near to any electrical appliances,
mobile or cordless phones.
