Power Sensor (Option) - Philips 223V5LSB/00 Service Manual

3.17.5 Volume Control
For monitors with a manual volume control, the direction (at the bottom) of the bezel
volume control is "-" key for Minimum volume and "+" key for Maximum volume. The
default shipping position of the Volume Control shall be approximately 90%.
3.17.6 Speaker Sensitivity
The speakers shall support a minimum sensitivity of 75 dB +/- 3 dB at 2W/1m at 1 kHz.
3.17.7 Maximum Audio Card Output
The monitor audio amplifier shall accept a maximum input voltage of 1.5 Vrms and meet
the following requirements at the maximum monitor volume setting:
3.17.8 Monitor Audio Amplifier Input Impedance
The monitor audio amplifier shall have minimum 10K Ohm AC input impedance

3.18 Power sensor (option)

UNCTIONAL Requirements for the front detection
For the presence sensor functionality, the following requirements are defined:

Two IRs be used for user present detections, one IR is for transmission signals, the other one is for
receiving reflection IR signals

User must be detected in the following range:
40 up to 100 cm (+ 20cm).

Detection angle:
+- 35 degree (for IR LED )

SENSOR key control,
Adjust detection distances (0~4 scales), default is 3 , tolerance : (±10cm)
0 : 0FF
1 : 90 cm
2 : 100 cm
3 : 110 cm
4 : >130 cm

SENSOR distance measure :
1. Cotton material color : black
2. Monitor center straight distance (90 deg)
3. Body width : about 40cm
4. Body horizontal move : Monitor center +- 5cm

Anti-interference between two monitors,
Monitors must have anti-interference methods(coding ..etc) to prevent monitors to talk to each other

power sensor Functional behavior
Time Period
PowerSensor
Power Saving
The following set-up's will be supported

1. The ratings of the audio amplifier may not be exceeded.
2. The ratings of the speakers may not be exceeded.
3. There must not be any clipping of the audio amplifier output signal.
Voltage dividers may be used to reduce the input signal level.
60sec
No ACTION
0
60sec ~ 180sec
Lower down backlight
brightness
50%
Meridian 5
CC170C
W8 LCD
C
C
180sec ~
Backlight & LCD panel
shutdown
80%
137