Philips 150P4CG, Руководство по обслуживанию

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150P4 LCD
19
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Electrical instructions
0. General
With normal VGA card:
AC/DC Measurement:
When carry-out the electrical settings in many cases a video
signal must be applied to the monitor. A computer with :
- ATI VGA 1024 V6-1.04/PH BETA4 interface card
- PGA 1024 (4822 212 30916), Mach 8.
- PGA 1280 (4822 212 30917), Mach 32.
- ATI GPT-1600 (4822 397 10065), Mach 64 (up to 107kHz)
are used as the video signal source. The signal patterns are
selected from the "service test software" package, see user
guide 4822 727
19896 (ATI1024), or 4822 727 20273 (PGA 1280), or
4822 727 21046 (GPT-1600).
0.1
If not using the ATI card during repair or alignment, The service
engineer also can use this service test software adapting with
normal standard VGA adaptor and using standard VGA mode
640 x 480, 31.5 kHz/60 Hz (only) as signal source.
0.2
The measurements for AC waveform and DC figure is based on
1024 x 768 48kHz/60 Hz resolution mode with test pattern "32
gray scale".
1.General points
1.1 During the test and measuring, supply a distortion free AC mains
voltage to the apparatus via an isolated transformer with low
internal resistance.
1.2 All measurements mentioned hereafter are carried out at a
normal mains voltage (90 - 132 VAC for USA version, 195 -264
VAC for EUROPEAN version, or 90 - 264 VAC for the model with
full range power supply, unless otherwise stated.)
1.3 All voltages are to be measurement or applied with respect to
ground, unless otherwise stated. Note: don't use heat-sink as
ground.
1.4 The test has to be done on a complete set including LCD panel in
a room with temperature of 25 +/- 5 degree C.
1.5 All values mentioned in these test instruction are only applicable
of a well aligned apparatus, with correct signal.
1.6 The letters symbols (B) and (S) placed behind the test instruction
denotes
(B): carried out 100% inspection at assembly line
(S): carried out test by sampling
1.7 The white balance (color temperature), has to be tested in
subdued lighted room.
1.8 Repetitive power on/off cycle are allowed except it should be
avoided within 6 sec.
2. Input signal
2.1 Signal type
Video : 0.7 Vp-p linear, positive polarity
Sync. : TTL level, separate, positive or negative polarity
Signal source: pattern generator format as attachment.
(table 1 to 14) Reference generator : CHROMA 2200 or 2250
2.2 Input signal mode
Pre-set 14 modes
PRESET VIDEO RESOLUTION
4. Display Adjustment
4.1Input signals check
In factory mode, use 64 gray level and set the R,G,B sub gain to
100%.
4.2 Display quality test
Use timing mode as described in 2.2,2.3,2.4, and use the POPO
(pixel on pixel off) pattern to adjust the clock until no stripe and
adjust the phase until clear picture. Check all pre-setting 14
modes.
4.3 Check of WHITE-D (B)
Apply a 48kHz/60Hz signal with white pattern, set brightness
control at 100%, and contrast control at 50%. Adjust the R, G, B
sub_gain, for the screen center, the 1931 CIE chromaticity (X, Y)
co-ordinates shall be;
Factory preset video resolution
9300 ° K 6500 ° K
x (center) 0.281 ± 0.005 0.312 ±
y (center) 0.311 ± 0.338 ±
0.005 0.005
0.005
Dot rate (MHz) H.freq (KHz) Mode Resolution V.freq (Hz)
25.175 31.469 IBM VGA 10h 640 * 350 70.087
28.322 31.469 IBM VGA 3h 720 * 400 70.087
25.175 31.469 IBM VGA 12h 640 * 480 59.940
30.240 35.000 MACINTOSH 640 * 480 66.667
31.500 37.861 VESA 640 * 480 72.809
31.500 37.500 VESA 640 * 480 75.000
36.000 35.156 VESA 800 * 600 56.250
40.000 37.879 VESA 800 * 600 60.317
50.000 48.077 VESA 800 * 600 72.188
49.500 46.875 VESA 800 * 600 75.000
57.300 49.700 MACINTOSH 832 * 624 75.000
65.000 48.363 VESA 1024 * 768 60.004
75.000 56.476 VESA 1024 * 768 70.069
78.750 60.023 VESA 1024 * 768 75.029
Use Minolta CA-110 for color coordinates and luminance check.
Luminance; 250 Nits (Hannstar panel) in the center of the screen.
4.4 Check the digital interface
Set the delay time to be 6 nsec.
Check the 64 gray level color poor & noise condition.
3. AC Adaptor
3.1Setup the AC I/P at 90VAC, and Output DC loading at 3.8 Amp,
The DC output voltage is 12 0.5 V DC
3.2Adjustment is nothing to do
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