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HP L1502
17
Electrical Instructions
Go to cover page
1.
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 measured 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
after 30 minutes warm-up at least in a room with temperature of 25
+/- 5 degree C.
1.5 All values mentioned in this 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 secretary.
2.1 Signal type
Video: 0.7 Vpp linear, positive polarity
Sync. : TTL level, separate, positive or negative polarity
Reference generator: CHROMA 2200 or 2250
Allowed signal modes list: Table A
General points
Input signal
2.
TABLE A
FACTORY PRESET DISPLAY MODES
Pixel
Format
Horz
Freq
(KHz)
Horz
Polarity
Vert
Freq
(Hz)
Vert
Polarity
Pixel
Clk
(MHz)
1
640 x 480
31.469
-
59.940
-
25.175
VGA
2
640 x 480
37.861
-
72.809
-
31.500
VESA
3
640 x 480
37.500
-
75.000
-
31.500
VESA
4
720 x 400
31.469
-
70.087
+
28.322
VGA
5
800 x 600
37.879
+
60.317
+
40.000
VESA
6
800 x 600
48.077
+
72.188
+
50.000
VESA
7
800 x 600
46.875
+
75.000
+
49.500
VESA
8
832 x 624
49.726
+/-
74.551
+/-
57.284
MAC
9
1024 x
768
48.363
-
60.004
-
65.000
VESA
10
1024 x
768
56.476
-
70.069
-
75.000
VESA
11
1024 x
768
60.023
+
75.029
+
78.750
VESA
3.
Display Adjustment
(B)
Access to factory mode. Check “CPU version”, if it is not right
version, then ISP new one (7301). After pre-check, aging 1 hour at
Least. Programming Analog DDC Data into Monitor.
3.1 Panel flicker adjustment (B)
Apply a 48kHz/60Hz signal with green pixel on/off at 128/256-level
pattern for LG panel. Set brightness control at 100%, and contrast
control at 50%, adjust GPIO1 of 7443 GM2116AA which is on
scaler board to make panel's flicker minimum.
3.2 Auto color adjustment
Apply a 48.36kHz/60Hz signal with white pattern.
Set brightness at 100% and contrast at 80%.
Using auto color, let scaler calibrate offset1,offset2 and gain itself.
** Check the 64-gray level is distinguishable.
3.3 Color temperature adjustment
Apply a 48.36kHz / 60Hz signal with white pattern.
Set brightness control at 100% and contrast control at 50%.
Adjust the R.G.B gain to reach special color temperature on
center of screen. Keep one color fixed gain to maximum at least.
The 1931 CIE chromaticity (x, y) coordinates shall be:
Use Minolta CA-110 for color coordinates and luminance check.
3.4
NVRAM(24C16) Default Values
Sub_Bri: 165
255/LG 230/CPT
225/QDI
Sub_Con: 100
127
154
VCOM:
152
3.5
Factory Reset
After finishing all the adjustment, select “Factory Reset” function
to recall:
Do an automatic Auto-Adjustment
Set Brightness = 100
Set Contrast = 50
Set Color = 6500K-sRGB
Set Custom Color (R.G.B) = 100
3.6 Main Menu Factory Default Values
The OSD shall have the following factory default values:
Language = English
OSD Cotrol:
Horizontal OSD position = 50
Vertical OSD position = 50
OSD timeout = 30s
Management:
Power Saver = ON
Power On Recall = ON
Mode display = OFF
Sleep Timer = OFF
Menu = BASIC
9300
°
K
6500
°
K-sRGB
x (center)
0.283
±
0.005
0.313
±
0.005
y (center)
0.297
±
0.005
0.329
±
0.005
Содержание Compaq fp5315
Страница 11: ...HP L1502 11 Go to cover page Wiring Diagram ...
Страница 40: ...40 9 Go to cover page HP L1502 AI 0021CSPEC Power Diagram ...
Страница 41: ...41 9 Go to cover page HP L1502 AI 0021CSPEC Power Diagram ...
Страница 42: ...42 9 Go to cover page HP L1502 Power board P C B Layout ...
Страница 43: ...43 9 Go to cover page Power board P C B Layout HP L1502 ...
Страница 44: ...44 9 Go to cover page Scaler board and P C B Layout HP L1502 ...