HP L1502 User manual

Horizontal frequencies
30 - 61 kHz
Service
Service
Service
TABLE OF CONTENTS
Published by BCU Monitors Printed in Taiwan Copyright reserved Subject to modification M May. 14 2004
Description Page
Important Safety Notice---- ------------------------------ 2
Technical Data ---------------------------------------------3
On-Screen Display-----------------------------------------5
Warning message------------------------------------------6
OSDlock/unlock,Aging mode----------------------------7
Trouble shooting------------------------------------------10
Wiring Diagram--------------------------------------------11
Flat panel adjust------------------------------------------12
Definition of pixel defects-------------------------------13
Connecting the monitor-----------------------------------4
Factory Mode/Failure mode of panel----------------8~9
Mechanical Instructions----------------------------14~15
Safety Test Requirments-------------------------------16
Description Page
Electrical Instructions-----------------------------------17
Display adjustment---------------------------------18~19
DDCInstructions/DATA----------------------------20~25
ISP Instructions-------------------------------------26~27
Repair Flow Chart/Tips----------------------------28~31
Function Block-------------------------------------------32
Scaler Diagram/Board C.B.A---------------------33~38
Control Diagram &C.B.A.------------------------------39
Power Diagram &C.B.A.--------------------------40~45
Exploded View------------------------------------------- 46
Spare/recommended parts list------------------47~49
General product specification--------------------50~67
Different parts list----------------------------------------68
REFER TOBACK COVER FOR IMPORTANTSAFETY GUIDELINES
CAUTION:USEASEPARATEISOLATION TRANSFORMER FOR THISUNITWHEN SERVICING.
ANYPERSON ATTEMPTING TOSERVICETHISCHASSISMUSTFAMILIARIZEHIMSELFWITH THECHASSIS
AND BE AWARE OF THENECESSARYSAFETY PRECAUTIONSTOBEUSED WHEN SERVICING ELECTRONIC
EQUIPMENTCONTAINING HIGHVOLTAGES.
SAFETY NOTICE
HP L1502
GBGB3138 10610384
AJ6S50/02/AJ6S50/76
15" LCD Colour Monitor

Important Safety Notice
2HP L1502 LCD
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Proper service and repair isimportant to the safe, reliable
operation of all HPConsumer Electronics Company**
Equipment. The service procedures recommended by HP and
described in this service manual are effective methods of
performing service operations. Some ofthese service
operations require the use of tools specially designed for the
purpose. The special tools should be used when and as
recommended.
It is important to note that this manual contains various
CAUTIONS and NOTICES which should be carefully read in
order to minimize the risk of personal injury to service
personnel. The possibility exists that improper service
methods may damage the equipment. It is also important to
understand that these CAUTIONS and NOTICES ARE NOT
EXHAUSTIVE. HP could not possibly know, evaluate and
advise the service trade of all conceivable ways in which
service might be done or of the possible hazardous
consequences of each way. Consequently, HP has not
undertaken any such broad evaluation. Accordingly, a
servicer who uses a service procedure or tool which is not
recommended by HP must first satisfy himself thoroughly that
neither his safety nor the safe operation of the equipment will
be jeopardized by the service method selected.
* * Hereafter throughout this manual, HP Consumer
Electronics Company will bereferred to as HP.
Critical components having special safety characteristics are
identified with a bythe Ref. No. inthe parts list and
enclosed within a broken line*
(where several critical components are grouped in one area)
along with the safety symbol on the schematics or
exploded views.
Use of substitute replacement parts which do not have the
same specified safety characteristics may create shock, fire,
or other hazards.
Under no circumstances should the original design be
modified or altered without written permission from Philips.
Philips assumes no liability, express or implied, arising out of
any unauthorized modification of design.
Servicer assumes all liability.
*BrokenLine
WARNING
Take care during handling the LCD module with backlight
unit
- Must mount the moduleusing mounting holes arranged infour
corners.
- Do not press onthe panel, edge of theframe strongly or electric
shock as this will result in damage to the screen.
- Do not scratch orpress on the panel withany sharp objects, such
as pencil or pen asthis may result in damage to the panel.
- Protect the module fromthe ESD as it maydamage the electronic
circuit (C-MOS).
- Make certain that treatment person s body are grounded through
wrist band.
- Do not leave themodule in high temperature andin areas of high
humidity for a long time.
- Avoid contact with water as it may ashort circuit within the module.
- If the surface ofpanel become dirty, please wipe it off with a soft
material. (Cleaning with a dirty or rough cloth may damage the
panel.)
FOR PRODUCTS CONTAINING LASER :
DANGER- Invisible laser radiation when open.
AVOID DIRECT EXPOSURE TO BEAM.
CAUTION- Use of controls or adjustments or
performance of procedures other than
those specified herein may result in
hazardous radiation exposure.
CAUTION- The use of optical instruments with this
product will increase eye hazard.
TO ENSURE THE CONTINUED RELIABILITY OF THIS
PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S
REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART
NUMBERS IN THE PARTS LIST SECTION OF THIS
SERVICE MANUAL.

3
HP L1502 LCD
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Technical Data
LCD
Vendor LGPL CPT
Updateddate 2002-Aug-30 2002-Dec.-13
Physical Dimension(mm)
Model Number LS150X08 CLAA150XP01
Diagonal Size--- inch 15.0" 15.0"
ActiveArea (WxH) 304.1x228.1 304.1x228.1
DisplayPixels(WxH) 1024(x3) x 768 1024(x3) x 768
Pixel Pitch (0.099x3) x 0.297 (0.099x3) x 0.297
Display Outline (WxHxT)326.0x253.5x11.2 326.5x253.5x11
Weight 1000g 1060g
Optical Characteristics
NumberofColors 6 bits (262K) 6 bits (262K)
ContrastRatio 400(typ),250(min) 500(typ),250(min)
ViewingAngle (L/R)--- C/R>10 65/65(typ) 70/70(typ)
ViewingAngle (U/D)--- C/R>10 45/55(typ) 65/65(typ)
Luminance--- nits 250(typ),200(min) 250(typ),200(min)
White (x,y) 313,329 313, 329
Red(x,y) 631,347 641,345
Green (x,y) 309, 583 305,567
Blue(x,y) 150,088 140, 88
ColorGamut-- % 59.5% 65%
Luminance Uniformity (min) 75% 75%
Backlight Life(min) 40Khrs 35Khrs
Crosstalk (max) 1.20% 1.5%
Electrical Characteristics
SupplyVoltage3.3V 3.3V
Operating Ambient Temp 0~50C 0~55C
Power Consumption(max) 10.4W 12.5W
Main Clock(Typ~Max) 65~79MHz 65~80Hz
Response time(Tr+Tf) 16ms(typ) 16ms(typ)
Pin Assignment
Unit dimension/Weight
Set Dimension(incl.Pedestal): W340mm xD185.3mmxH338mm.
Newweight: 3.6 Kg
TemperatureRanges
OperatingTemperature(Independent of altitude):5to35DegreeC.
Non-OperatingTemperature(Independent of altitude):-20 to60
DegreeC.
Humidity
Operating(non-condensing) :20%to80%
Non-Operating (38.7Degree Cmaximum wet bulbtemperature):
5%to90%
Altitude
Operating:0to 12,000 feet [3,658 m].Equivalent to 14.7 to 10.1 psia.
Non-Operating:0to 40,000 feet [12,192m.Equivalent to 14.7 to 4.4
psia
FACTORYPRESETDISPLAYMODES
1.3.
Product description
The HP 15 TFT flat panel LCDmonitor isspecifiedasa
displayperipheral with analog videosignal input.
Thisscan rangedisplayresolutionup to 1024*768 at 75 Hz
refreshrate.he image can beadjustedbyOS
Dcontrol.
1.1.1 Controls
Front:Rear
-DC powerswitch -VGA cable
-OSD+key-ACcable
-OSD-key
-OSDMenukey
1.1.2 Inputsignals VGA Analog - Signal inputlevel
Video : 0.7 Vp-p LinearSync : 3V3 and5VTTLlevel,Separate,
Positive/Negative- Impedance
Video: Terminatedwith 75 1 % Sync :Terminatedwith 2K2
1.2 Destination: AP, CN, EE, LA, ME, S H, WE.
1.3.1 Power supplyMain voltage: 90 – 264 VAC, 47 - 63Hz
Powercord length: 1.8M, IEC C-13/C-14 (Standard) type
Auto powersaving: EPA, Nutek, VESA DPMS
2Scanning
Horizontal Frequency: 30- 61 KHz Vertical Frequency: 56 - 76 Hz
Actual displaysize: 304 x 228 mm Max. resolution: 1024 x 768
General
"
-

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HP L1502 LCD
Connecting the monitor
Connecting to Your PC
1. Place the monitor in a convenient, well-ventilated location near your
computer.
2. Connect the monitor signal cable on the back of the monitor to the
video connector on the rear panel of the computer.
3. Connect one end of the power cable to the back of the monitor, and
the other end to an electrical wall outlet.
Installing the Monitor Pedestal
To install the monitor pedestal:
1. Place the pedestal plate on your desktop or table and check to
be sure the arrow on the underside of the plate is facing forward.
Do not install the base if the monitor will be used on a wall, swing arm,
or other mounting fixture; instead see the section on “Mounting the
Monitor” in this chapter.
2. Using both hands, position the monitor over the pedestal base
and press down firmly to lock the pedestal base in place. When the
base locks, it will make a clicking sound. Make sure the pedestal base
is securely locked before continuing with the setup.
If you need to remove the pedestal base, lay the monitor down on
a soft protected surface. On the bottom side of the pedestal base,
press together the two tabs as shown in the following illustration.
This will release the pedestal from the base.
Front Panel Components
1 Menu button Launches the On-Screen Display (OSD) menu and
selects functions.
2 (Minus button) When OSD is inactive, auto-adjusts the screen
image. When OSD is active, navigates in reverse through the OSD
And adjusts OSD scale settings.
3 + (Plus button) When the OSD is active, navigates through the OSD
and adjusts OSD scale settings.
4 Power LED Fully powered = Green.
Sleep mode = Amber.
Sleep Timer mode = Flashing Amber.
5 Power Switch Powers the monitor on and off.Number Control Function

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HP L1502 LCD
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On-Screen Display
Pressing the Menu button ( ) the first time brings up the BASIC
menu level. The + and - buttons move up and down the menu,
respectively. The selected menu function shall be highlighted in
orange text for all menus. Pressing the Menu button again brings up
the second menu level for the item selected. The selection will wrap
around if the bottom item is selected and the button is pressed, the
selection will move to the top item. Likewise, if the top item is
selected and the + button is pressed, the selection will move to the
bottom item. Selecting the "Advanced Menu" from the Basic Menu
will result in the display of the ADVANCED OSD. The Advanced
Menu will remain the default OSD upon subsequent power-ups of the
monitor until the"Basic Menu" option is selected or until "factory
Reset" is selected.
Mode Menu
Menu Level 1 Menu Level 2 Menu Level 3 Factory Reset?
Brightness ADJ Scale Y (FD=100)
Contrast ADJ Scale Y (FD=50)
Image Control (Analog
only)
Auto Adjustment (“Adjusting…” mes sage) Y (no FD)
Horizontal Position ADJ Scale Y (no FD)
Vertical Position ADJ Scale Y (no FD)
Clock ADJ Scale Y (no FD)
Clock Phase ADJ Scale Y (no FD)
Cancel
Save and Return
Color 9300 K
6500 K Y (FD)
Custom Color Custom Color ADJ
sRGB
Cancel
Save and Return
Service Display Hours N
Reset Total Hours Confirm Reset N
Reset Backlight Hours Confirm Reset N
Copy All Settings Confirm Reset N
Recall All Settings Confirm Reset N
Display White Block N
Cancel N
Save and Return N
Project name
Firmware Rev and Panel type
Language Deutsch
English N (FD=English)
Español
Français
Italiano
Nederlands
Cancel
Save and Return
Management Power Saver On / Off Selection N (FD=ON)
Power On Recall On / Off Selection N (FD=ON)
Mode Display On / Off Selection N (FD=OFF)
Sleep Timer Timer Set Menu N (FD=0;OFF)
Basic menu N (FD=Basic )
Cancel
Save and Return
OSD Control Horizontal OSD Position ADJ Scale N (FD=50)
Vertical OSD Position ADJ Scale N (FD=50)
OSD Timeout ADJ Scale N (FD=30)
Cancel
Save and Return
Factory Reset Yes
No
Exit
Advanced osd service mode configuration
Basic osd service mode configuration
Mode Menu
Menu Level 1 Menu Level 2 Menu Level 3 Factory Reset?
Brightness ADJ Scale Y (FD=100)
Contrast ADJ Scale Y (FD=50)
Auto Adjustment (“Adjusting…” message) Y (no FD)
Advanced Menu
Exit

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HP L2025
HP L1502 LCD
6
Warning Message Table
Item Attention Signals Display Time Condition
1 Input Signal out of Range See power saver table
2 No Input Signal See power saver table
3 Going to Sleep See power saver table
4 Adjusting.... Auto hot key or OSD menu function
5 OSD Lockout 10secs Push menu key for 10 sec then display 10 sec WM"OSD
Lockout"
6 Check Video Cable See power saver table
Power Saver - On Power Saver - Off Note
Quit signal with
cable
1. System blank and show WM
"Going to Sleep"3 sec then sleep.
1. System blank and show moving
WM "No Input Signal" always.
Disconnect cable 1. System blank and show WM
"Check Video Cable" 10
1. System blank and show WM
"Check Video Cable" 10
sec then moving about 50 sec. 2.
Show WM "Going to Sleep" 3 sec
then sleep. 3. If push any key in
sleep mode, then repeat item 1 to
2.
sec then moving always.
Out of range - 1 1. System blank and show moving
WM "Input Signal out of Range"
60 secs. 2. Show WM "going to
Sleep" 3 sec then sleep. 3. If push
any key in sleep mode, then
repeat item 1to 2.
1. System blank and show moving
WM "Input Signal Out of Range"
always.
H<29.5 or
H>82.5 or V<49
or V>87 or
Vtotal>=120 0
Out of range - 2 1. Show moving WM"Input Signal
out of Range" 60 sec.
1. Show moving WM "Input Signal
out of Range"60 sec.
DownScaling
Ex. 1280x1024
2. Menu key can active during
moving WM and operate OSD
menu. 3. WM disappear if menu
key push or after WM 60 sec.
2. Menu key can active during
moving WM and operate OSD
menu. 3. WM disappear if menu
key push or after WM 60 sec.
Out of range - 3 1. Show moving WM "Input Signal
out of Range" 60 sec.
1. Show moving WM "Input Signal
out of Range" 60 sec.
85Hz
2. After moving WM 60 sec then
show WM "Going to Sleep" 3 sec
then sleep. 3. If push any key in
sleep mode, then repeat item 1 to
2.
2. After moving WM 60 sec then
show WM "Going to Sleep"3 sec
then sleep. 3. If push any key in
sleep mode, then repeat item 1 to
2.
Power saver table

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HP L1502 LCD
Front Panel Components
Fig.1
Fig.2
Access Aging..mode
Bringup
After 15seconds, bringupAfter 15seconds, bringup
After 15seconds, bringup
After 15seconds, bringup

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HP L1502 LCD
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Factory mode
Front control panel
Fig.1
Basic and simple instruction on the control keys.
When youpress thebutton on thefront control ofyour monitor,theOn-
Screen Display (OSD) Main Controlswindowwill pop upandyoucan
then start making adjustmentsto your monitor's various features.
Access Factory Mode
Howto Get into Factory Mode Menu
Step.1Turn off monitor.
Step 2:
[Push " " & " + " buttonsat thesame time and hold it ]+
[Press power ""button untill comesout"Windows screen"
]=>then releaseallbuttons.
Step 3
Press " " button,bring up Factory mode indication as
showninFig2.
Fig.2
VAL:READ
SUB-BRI : Brightness value range(Min Max).
Fixvaluefor continue mode requirement.
SUB-CON : Contrastvalue range(Min Mid Max)
SRGB : isequal to 6500K
Gain-m:MinimumvalueofUser Gain
Gain-M : MaximumvalueofUser Gain
AUTO-SUB: TodoAuto color function when
push “Up”key in white pattern
IDX : Limit current ofinverter (FixvalueLG: 7, CPT: 28)
Panel Type:Ifset thisto 1111, 2222 then system will
force panel type to LG,CPT
SCALER : Read/Write scaler register

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HP L1502 LCD
12
HP ADJUSTMENT PATTERN.EXE
VERSION: 2.00 Rev A
OPERATING SYSTEM(S):
Microsoft Windows 98
Microsoft Windows Millennium Edition (ME)
Microsoft Windows 2000
Microsoft Windows XP 32-bit Personal
Microsoft Windows XP 32-bit Professional
DESCRIPTION: This CD contains the HP Auto-Adjustment utility, which is a
single pattern program designed to help improve the picture quality of your HP
flat panel monitor.
Note: Do not use the following procedure if your flat panel monitor is using a
DVI connector option.
To use the Adjustment pattern with your flat panel monitor:
1. Execute the auto-adjust function from the OSD main menu.
2. If the result is not satisfactory, start the "Adjustment pattern.exe" program
and repeat step 1.
Image quality characteristics that can be improved:
- Fuzzy or unclear focus
- Ghosting, streaking or shadowing effects
- Faint vertical bars
- Thin horizontal scrolling lines
- Centering the picture
Note: To achieve optimal picture performance, it is recommended that you
always set the operating system display mode to your flat panel's native
resolution. See list below for reference.
14in. and 15in. flat panels = 1024x768
17in., 18in. and 19in. flat panels = 1280x1024
20in. and 21in. flat panels = 1600x1200
Flat Panel Adjust

13
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HP L1502 LCD

14
Mechanical Instruction
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HP L1502 LCD
Front view
Step 1. Remove the Base as Fig.3
remove the four screws of back cover and pull down the base
as Fig.4, Fig.5
Fig.3
Fig.4
Fig.2
Fig.1
Step 2. Remove the front cover as Fig.5~9.
A. Unscrew the screw as shown Fig.5
B. Use thin "I" type screwdriver to open 2 clicks on bottom
side
C .Use thin "I" type screwdriver to open 2 clicks on right
side
D. Use thin "I" type screwdriver to open 2 clicks on left
side
Fig.5
Fig.6
Fig.7
Fig.8
Back View
Base
Four screws
Fig.9
Two screws
Step 3. Remove the control board
unscrew the two screws as Fig.9
step 4. Remove the back cover
open the clicks as Fig.10~11

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HP L1502 LCD
16
All units that are returned for service or repair must pass the
original manufactures safety tests. Safety testing requires both
and testing.Hipot Ground Continuity
HI-POT TEST INSTRUCTION
1.Application requirements
2.
1.1 All mains operated products must pass the Hi-Pot test as
described in this instruction.
1.2 This test must be performed again after the covers have
been refitted following the repair, inspection or modification
of the product.
2.1 Connecting conditions
2.1.1 The test specified must be applied between the parallel-
blade plug of the mainscord and all accessible metal
parts of the product.
2.1.2 Before carrying out the test, reliable conductive
connections must be ensured and thereafter be
maintained throughout the test period.
2.1.3 The mains switch(es) must be in the "ON" position.
2.2 Test Requirements
All products should be HiPot and Ground Continuity tested as
follows:
Test 2820VDC 1700VDC Test current:
voltage (2000VAC) (1200VAC) 25A,AC
Test time:
Test time 3 seconds 1 second 3 seconds(min.)
(min.) Resistance
required:
Trip set at 100 uA 5 mA <=0.09+Rohm,
current for Max. R is the
(Tester) limitation; set resistance of
at 0.1 uA for the mains cord.
Min. Limitation
Ramp set at 2
time seconds
(Tester)
Test method
Condition HiPot Test for HiPot Test for Ground Continuity
products where products where Test requirement
the mains input the mains input is
range is Full 110V AC(USA
range(or 220V type)
AC)
2.2.1 The minimum test duration for Quality Control Inspector
must be 1 minute.
2.2.2 The test voltage must be maintained within the specified
voltage + 5%.
2.2.3 There must be no breakdown during the test.
2.2.4 The grounding blade or pin of mains plug must be
conducted with accessible metal parts.
3. Equipments and Connection
3.1. Equipments
For example :
- ChenHwa 9032 PROGRAMMABLE AUTO SAFETY
TESTER
- ChenHwa 510B Digital Grounding Continuity Tester
- ChenHwa 901 (AC Hi-pot test), 902 (AC, DC Hi-pot test)
Withstanding Tester
3.2. Connection
4. Recording
Hipot and Ground Continuity testing records have to be kept
for a period of 10 years.
* Turn on the power switch of monitor before Hipot and
Ground Continuity testing.
Connect the "video cable"
or "grounding screw"
to the CLIPon your tester.
Video cable
(Rear view of monitor)
Connect the power cord
to the monitor.
Grounding screw
Power outlet
(ChenHwa 9032 tester)
Clip
Clip
Safety Test Requirements

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HP L2025 7
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HP Ll502 LCD
Electrical Instructions
1. General points
1.1 Duringthe test andmeasuring, supplyadistortion
free AC mains voltagetotheapparatus via an isolated
transformer withlowinternal resistance.
1.2 All measurements mentionedhereafter are carriedout
at a normal mains voltage(90 - 132 VAC for USA version,
195 -264 VAC for EUROPEAN version,or 90 - 264 VAC
for themodel withfull rangepower supply, unless
otherwise stated.)
1.3 All voltages are to bemeasuredor appliedwith
respect to ground, unless otherwise stated.
Note:don’t use heat-sinkas ground.
1.4 The test has to bedone on a complete set including
LCD panel after 30 minutes
warm-upat least in a roomwithtemperature
of25+/-5degree C.
1.5 All values mentionedin this test instruction are only
applicable ofawell alignedapparatus,withcorrect signal.
1.6 The letters symbols (B) and(S)placedbehindthe test
instruction denotes
(B): carriedout 100% inspection at assemblyline
(S): carriedout test by sampling
1.7Thewhite balance (color temperature)has to be
testedin subduedlightedroom.
1.8 Repetitivepower on/off cycle are allowedexceptitshould
beavoidedwithin 6sec.
Allowedsignal modes list:
2. Input signal
2.1 Signal type
Video:0.7Vpp linear,positivepolarity
Sync. : TTL level,separate,positiveornegativepolarity
Reference generator: CHROMA 2200 or 2250
Table A
TABLEA
FACTORYPRESETDISPLAYMODES
3. DisplayAdjustment (B)
Access to factorymode.
Check "CPU version "ifit is not rightversion,then ISP newone.
After pre-check, aging1hour at least.
ProgrammingAnalog DDC Data into Monitor.
3.1Auto color adjustment
Applya640 * 480 / 60Hz signal with16level greytest pattern,
set brightness control at 100%, andcontrast control at 50%.
Adjust theR. G. B offset,andgain to calibrate the color smoothly
and64-greylevel distinguishable.
3.2Color temperature adjustment
Applya48.36kHz / 60Hz signal withwhite pattern.
The1931 CIE chromaticity (x, y) coordinates shall be:
Set brightness control at 100% andcontrast control at 50%.
Adjust theR.G.B gain to reachspecial color temperature on center
ofscreen.K
eepone color fixedgain to maximumat least.
Use Minolta CA-110 for color coordinates andluminance check.
3.3 FactoryReset
After finishingall theadjustment,select “Factory
Reset”function to recall:
Doanautomatic Auto-Adjustment
Set Brightness = 100
Set Contrast =50
Set Color = 6500K-sRGB
Set CustomColor (R.G.B) = 100
3.4 Main Menu FactoryDefault Values
TheOSD shall havethefollowingfactorydefault values:
Language=English
OSD Cotrol:
Horizontal OSD position =50
Vertical OSD position =50
OSD timeout =30s
Management:
Power Saver =ON
Power OnRecall =ON
Modedisplay=OFF
SleepTimer =OFF
Menu = BASIC

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Display Adjustment
HP L1502 LCD
18
Display Adjustment:
Press and button simultaneously while power off.
Then press the power button
Adjust OSD menu to lower position of screen (i.g. adjust OSD HPosition
and OSD V-Position to 0 at OSD setup sub-menu. Then
press + or - button to move the cursor to Factory Entrance
item ( see yellow circle on table 1). Press MENU button to access
to factory mode (see table2.). Check the code of CPU version if it
is not right version, then ISP new one. After pre-check,
aging 1 hour at least. Programming Analog DDC data into
Monitor. Check # serial number to meet bar code label.
Table 2. The content of Factory setting.see table 2.
Cursor can move on gray color area
1.Auto color adjustment
Apply a 640 * 480 / 60Hz signal with 16 level grey test pattern,
set brightness control at 100%, and contrast control at 50%.
Adjust the R. G. B offset, and gain to calibrate the color smoothly
and 64-grey level distinguishable.
2Color 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.
2 .1 Aim the probe CA-A30 at the center of screen as Fig. 1
2 .2 Remove the lens protective cover of probe CA-A30.
2 .3 Set Measuring/viewing selector to Measuring position for reset
analyzer. (Zero calibration) as Fig. 2
2 .4 Turn on the colour analyzer (CA-110).
2 .5 Press 0-CAL button to start reset analyzer. See Fig.3
Fig.1
Fig.2
Fig.3
VAL: READ
Table 2

Display Adjustment 25
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HP L2025 7
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HP L1502 LCD
2.6 Switch lightprobetoViewingposition.
2.7MovetheLens barrel forwardor backwardtoget clearimageas
showninFig. 4
2.8 Switch lightprobetoMeasuringposition.Itshould beable to
indicate colourvalue ontheCA-110.
Fig.4
2.9PressMENUbuttonstoselectRGBof9300 and 6500.
Increase / decrease value by press UP or DOWN buttons until the
1931 CIE chromaticity ( x, y ) as below.
Alignment hits:
1. R for x value ,Gforyvalue,BforYvalue onthecolouranalyzer.
2. Must toselect9300 in usermode,then 9300 is available in factory
Mode.
3. Must toselect6500 in usermode,then 6500 is available in factory
Mode.
3.1 FactoryReset
Afterfinishingall the adjustment,select“Factory
Reset”functiontorecall:
Doan automaticAuto-Adjustment
Set Brightness = 100
Set Contrast =50
Set Color = 6500K-sRGB
Set CustomColor (R.G.B) = 100
3.2 Main Menu FactoryDefault Values
TheOSDshall havethefollowingfactorydefault values:
Language=English
OSDCotrol:
Horizontal OSDposition=50
Vertical OSDposition=50
OSDtimeout =30s
Management:
PowerSaver=ON
PowerOnRecall =ON
Mode display =OFF
Sleep Timer=OFF
Menu =B
ASIC

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HP L1502 LCD
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General
DDC Data Re-programming
In case the DDC data memory IC or main EEPROM which storage all
factory settings were replaced due to a defect, the serial numbers have
to be re-programmed" Analog DDC IC, Digital DDC IC & EEPROM".
It is advised to re-soldered DDC IC and main EEPROM from the old
board onto the new board if circuit board have been replaced, in this
case the DDC data does not need to be re-programmed.
Additional information
Additional information about DDC (Display Data Channel) may be
obtained from Video Electronics Standards Association (VESA).
Extended Display Identification Data(EDID) information may be also
obtained from VESA.
Systemand equipmentrequirements
1. An i486 (or above) personal computer or compatible.
2. Microsoft oper ation system Windows 95/98.
Note: The alignment box has already build-in a batteries socket for
Using batteries (9V) as power source. Pull out the socket by
remove four screws at the rear of box. Please do not forget that
remove batteries after programming. The energy of batteries can
only drive circuits for a short period of time.
Pin assignment
A. 15-pin D-Sub Connector
Fig.3
3EDID 45.EXE PROGRAM
4. A/D Alignment kits (3138 106 10079):
inclusion : a. Alignment box x1 (as Fig. 2)
b. Printer cable x1
c. (D-Sub) to (D-Sub) cable x1
Fig.2
You have to install the EDID-PORT-TOOLunder win2000/NT as Fig.1
Fig.1
A. Cody the "UserPort.sys" to C:\WINNT\system32\drivers(win2000)
B. Running " io.exe" everytime, Before you start to programming
edid data .
Note: The EDID45.EXE is a windows-based program, which cannot
be run in MS-DOS.
DDC Instructions