Philips 170X7FB/00 Service Manual page 24

24 190X7&170X7 LCD
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Remark1: The 19 timing modes in
Preset modes
which need to be ensured perfect performance.
Remark2: Other modes can pass with fair performance.
Remark3: If 1280x720 and 960x720 can not be distinguished then
1280x720 is preferred.
Remark4: If 1280x768 and 1024x768 can not be distinguished then
1024x768 is preferred.
2.3 Allowed 85 Hz overscan signal mode specified
Once the signal input of PC is 85Hz, this monitor is able to display
at least for
10 minutes. An attention signal appears and shows "THIS IS
85HZ OVERDRIVE, CHANGE COMPUTER DISPLAY INPUT TO
1280X1024 @ 60 HZ"
Dot rate (MHz) H. Freq (KHz)
36.000 43.269
56.250 53.674
94.500 68.677
3. Power Supply (S)
Setup the AC I/P at 90VAC, and Output DC loading at
12V 3.7 Amp, 5V 2.1 Amp,
The DC output voltages are 5V ± 0.25V and 12V± 1.2V.
4. Display Adjustment
4.1 Access to factory mode (RS232) in auto-alignment system
The communication protocol switch to RS232 .
4.2 Auto color adjustment (B)
Apply timing 1280*1024 /60 Hz with 32 gray pattern. Set
brightness to 100%
and contrast to 50%.
Alignment program will adjust R/G/B offset and gain to
calibrate the color automatically.
After finishing the adjustment, check the color performance
with 64-gray level pattern.
The adjacent levels should be distinguishable.
Check Factory Preset 19 modes.
4.3 Adjustment of WHITE-D (B)
4.3.1 Use Minolta CA-110 for color coordinates check:
Apply timing 1280*1024 /60 Hz with white pattern.
Set brightness control to 100% and contrast control to
50%.
Adjust the R, G, B Sub-gain, for the screen center,
the 1931 CIE chromaticity (X, Y) coordinates shall be
9300°K
0.283 ± 0.005
x (center)
0.297 ± 0.005
y (center)
4.3.2 Use Minolta CA-110 for luminance check:
Apply timing 1280*1024 /60 Hz with white pattern. Set brightness
control to 100% and
contrast control to100% to check the luminance in the center of
the screen.
(1) >= 250 Nit for Original Color
(2) 215 ± 10 Nit for 6500°K
Electrical instructions(170X7)
Blue and Bold texts represent Factory
Mode Resolution V. Freq (Hz)
VESA 640 * 480 85.008
VESA 800 * 600 85.061
VESA 1024 * 768 84.997
6500°K
0.313 ± 0.005
0.329 ± 0.005
4.4 Adjustment of sRGB
Apply a 1280*1024 / 60Hz signal with white pattern, set
brightness to 100%, and
contrast to 50%. Adjust the R, G, B Sub-Gain, for the screen
center, the 1931 CIE
chromaticity (X, Y) co-ordinates shall be;
x(center)
y(center)
Ynits
4.5 EEPROM presetting (B)
4.6
After finishing all the adjustment need to reset:
"Brightness" to 100%
"Contrast" to 50%
"OSD position" at middle of screen
"Color" to Original color temperature
"Stand-Alone" set to Off
"Mute" set to Off
Remark : Color temperature default setting depends on the
region of the model.
For European (/00) and NAFTA/LATAM (/27)
models, it is Original color
For APMEA model (/69,/75,/93,/96,/97), it is
9300°K
production) model (/78), it is 6500°K
sRGB
0.313 ± 0.005
0.329 ± 0.005
180 ± 10
For LATAM (Manaus