1-12
VPL-ES7
FAN control, Thermal sensor block
The IC with the built-in FAN control and thermal sensor function is used.
.
FAN control
This detects the FG of the FAN, and controls the number of rotations. The number of rotations is set in
accordance with the internal temperature.
.
Thermal sensor
The thermal sensor is placed at the lower part of the power board, and the internal temperature is mea-
sured.
Ballast drive block
This drives the ballast in synchronization with the input signal. The synchronous circuit is formed by the
microprocessor.
When the lamp mode is standard, ballast is driven in synchronization with the frequency 1.5 times higher
than that of the input signal. When the lamp mode is high, the ballast is driven in synchronization with the
input signal.
RS232C block
This is used to connect the PW-190 via the RS232C driver/receiver IC. Because the number of serial ports
is limited on the PW-190, the RS232C and network cannot be used at the same time. The RS232C block
is equipped with the circuit that switches them.
Sensor Board:
The sensor boards include the thermal sensor board, lamp cover switch board,
fi
lter door switch board,
and IR sensor board.
Power Board:
This supplies the lamp power and the system power. For the system power,
+
15.25 V,
+
12 V, and
+
5 V
are output, and the circuit power is generated on the main board.