Display Identification; Usb Hub; Visual Characteristics; Test Conditions - Philips 170A7 Service Manual

17" LCD Color Monitor
The monitor must comply with the Microsoft On Now specification, with two power management states, as defined
by the VESA DPMS document. The monitor must appropriately display the DPMS state.
Mode
Power-On
Off
DC Power Off

3.8 Display identification

In accordance with VESA Display Channel Standard Ver.1.0 and having DDC 2B capability
NA

3.9 USB Hub

4. Visual characteristics

4.1 Test conditions

Unless otherwise specified, this specification is defined under the following conditions.
(1) Input signal: As defined in 3.3, 1280 x 1024
non-interlaced mode (75K/60Hz), signal sources must have 75 ohm output impedance.
(2) Luminance setting: controls to be set to 200 nits with full screen 100 % duty cycle white signal
(3) Warm up: more than 30 minutes after power on with signal supplied.
(4) Ambient light: 400 -- 600 lux.
(5) Ambient temperature: 25 ± 5 °C

4.2 Brightness

>=250 nits (at panel color temperature, at center of the screen, set contrast and brightness at maximum.)

4.3 Image size

Actual display size 337.9 x 270.3 mm (acc. To SHT 191 & leaflet)

4.4 Brightness uniformity

Set contrast at 100% and turn the brightness to get average above 200 nits at centre of the screen.
Apply the Fig 1; it should comply with the following formula:
Where B_max =Maximum brightness
B_min = Minimum brightness

4.5 Check Cross talk (S)

Apply Pattern 2. Set contrast and brightness at 100 %.
Measure YA. Then output Pattern 3 and measure YB. The cross talk value:

4.6 White color adjustment

HSYNC VSYNC Video
On On Active
Off Off blanked
N/A
B_min
B_max
ABS (YA - YB)
⎯⎯⎯⎯⎯⎯⎯⎯⎯ X 100% < 2.0 %
YA
Pwr-cons. Indication
< 57 W (max)
Green LED
33W (typ.)
< 1 W Amber LED
< 1 W
X 100% >75%
90
Rec. time
--
< 3 s
LED Off