Philips 231P4UPEB/00, Service Manual

Page: 81 / 95

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0.1 231B4UC 23” Wide 16:9 LCD Monitor
2012/08/09 PHILIPS 81 of 95
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.
3.19 USB HUB 3.0 / 2.0 support
Connect the HUB port of the monitor to host PC’s USB port via USB cable,
Then attach external device to the downstream port of the monitor.
Check if the device can work properly.
3.20 POWER SENSOR
˨ˡ˖˧˜ˢˡ˔˟ʳ˥˸̄̈˼̅˸̀˸́̇̆ʳ˹̂̅ʳ̇˻˸ʳ˹̅̂́̇ʳ˷˸̇˸˶̇˼̂́ʳ
For the presence sensor functionality, the following requirements are defined:
x
Two IRs be used for user present detections, one IR is for transmission signals, the other one is
for receiving reflection IR signals
x
User must be detected in the following range:
40 up to 100 cm (+ 20cm).
x
Detection angle:
+- 30 degree (for IR LED )
x
SENSOR key control,
Adjust detection distances (0~4 scales), default is 3 , tolerance : (
̈́
10cm)
0 : 0FF
1 : 90 cm tolerance : (
̈́
10cm)
2 : 100 cm tolerance : (
̈́
10cm)
3 : 110 cm tolerance : (
̈́
10cm)
4 : >130 cm