109
Rigel-PJ1nx Training
Slide 109
Pre-cooling
The charge in the capacitor during normal operation (when the
lamp is lit) begins to discharge after the lamp is turned off, and
this charge goes down slowly. Until the lamp is lit again, this
voltage is read out at the Slow ADC of IC3001 so that the lapse of
time can be detected after the lamp was turned off.
During the normal standby period, however, the Main CPU
(IC3001) operates and the CPU counts the lapse of time. This
discharge circuit becomes effective when the AC power is
interrupted or no power is fed to the Main CPU (IC3001), as in the
case of the Power Saving mode.
The relationship between the lapse of time and the execution of
pre-cooling is shown below. This is only for reference.
0 ~90 seconds after lamp OFF: The lamp is lit after 60 seconds of
pre-cooling.
90 ~150 seconds after lamp OFF: The lamp is lit after 30 seconds
of pre-cooling.
150 ~300 seconds after lamp OFF: The lamp is lit after 0 second
of pre-cooling.
More than 300 seconds after lamp OFF: The lamp is lit without
pre-cooling.
