HP L1502 Service Manual
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HP L1502 Service Manual

15" lcd colour monitor
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15" LCD Colour Monitor
Service
Service
Service
Description
Important Safety Notice---- ------------------------------ 2
Technical Data ---------------------------------------------3
Connecting the monitor-----------------------------------4
On-Screen Display-----------------------------------------5
Warning message------------------------------------------6
OSD lock/unlock,Aging mode----------------------------7
Trouble shooting------------------------------------------10
Wiring Diagram--------------------------------------------11
Flat panel adjust------------------------------------------12
Definition of pixel defects-------------------------------13
Mechanical Instructions----------------------------14~15
Safety Test Requirments-------------------------------16
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC
EQUIPMENT CONTAINING HIGH VOLTAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING.
REFER TO BACK COVER FOR IMPORTANT SAFETY GUIDELINES
Published by BCU Monitors
Printed in Taiwan

TABLE OF CONTENTS

Page
Description
Electrical Instructions-----------------------------------17
Display adjustment---------------------------------18~19
DDC Instructions/DATA----------------------------20~25
ISP Instructions-------------------------------------26~27
Repair Flow Chart/Tips----------------------------28~31
Function Block-------------------------------------------32
Scaler Diagram/Board C.B.A---------------------33~38
Exploded View------------------------------------------- 46
Spare/recommended parts list------------------47~49
General product specification--------------------50~67
Different parts list----------------------------------------68
SAFETY NOTICE
Copyright reserved
Subject to modification M
HP L1502
AJ6S50/02/AJ6S50/76
Horizontal frequencies
30 - 61 kHz
May. 14 2004
GB
GB
Page
3138 106 10384

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Summary of Contents for HP L1502

  • Page 1: Table Of Contents

    15" LCD Colour Monitor HP L1502 Service Service Service AJ6S50/02/AJ6S50/76 Horizontal frequencies 30 - 61 kHz TABLE OF CONTENTS Description Page Description Page Important Safety Notice---- ------------------------------ 2 Electrical Instructions-----------------------------------17 Technical Data ---------------------------------------------3 Display adjustment---------------------------------18~19 Connecting the monitor-----------------------------------4 DDC Instructions/DATA----------------------------20~25...

  • Page 2: Important Safety Notice

    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.

  • Page 3: Technical Data

    Pin Assignment Product description " The HP 15 TFT flat panel LCD monitor is specified as a display peripheral with analog video signal input. This scan range display resolution up to 1024*768 at 75 Hz refresh rate. he image can be adjusted by OSD control.

  • Page 4: Connecting The Monitor

    HP L1502 LCD Connecting the monitor Go to cover page 1 Menu button Launches the On-Screen Display (OSD) menu and Connecting to Your PC selects functions. 1. Place the monitor in a convenient, well-ventilated location near your 2 (Minus button) When OSD is inactive, auto-adjusts the screen computer.

  • Page 5: On-Screen Display

    On-Screen Display HP L1502 LCD Go to cover page 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.

  • Page 6: Warning Message

    HP L2025 HP L1502 LCD Warning Message Go to cover page Warning Message Table Item Attention Signals Display Time Condition Input Signal out of Range See power saver table No Input Signal See power saver table Going to Sleep See power saver table Adjusting..

  • Page 7: Osd Lock/Unlock,Aging Mode

    HP L1502 LCD Go to cover page Front Panel Components Access Aging..mode Fig.1 Bring up After 15 seconds, bring up After 15 seconds, bring up After 15 seconds, bring up After 15 seconds, bring up Fig.2...

  • Page 8: Factory Mode/Failure Mode Of Panel

    Factory mode HP L1502 LCD Go to cover page Front control panel Fig.1 Basic and simple instruction on the control keys. When you press the button on the front control of your monitor, the On READ VAL: Screen Display (OSD) Main Controls window will pop up and you can then start making adjustments to your monitor's various features.

  • Page 12: Flat Panel Adjust

    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.

  • Page 13: Definition Of Pixel Defects

    HP L1502 LCD Go to cover page...

  • Page 14: Mechanical Instructions

    HP L1502 LCD Mechanical Instruction Go to cover page Front view Fig.1 Fig.5 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"...

  • Page 16: Safety Test Requirments

    Safety Test Requirements HP L1502 LCD Go to cover page 3. Equipments and Connection All units that are returned for service or repair must pass the original manufactures safety tests. Safety testing requires both testing. 3.1. Equipments Hipot Ground Continuity...

  • Page 17: Electrical Instructions

    Electrical Instructions HP Ll502 LCD HP L2025 HP L2025 HP L2025 Go to cover page Display Adjustment General points Access to factory mode. Check "CPU version " if it is not right version, then ISP new one. After pre-check, aging 1 hour at least.

  • Page 18: Display Adjustment

    Display Adjustment HP L1502 LCD Go to cover page Display Adjustment: 1.Auto color adjustment Press button simultaneously while power off. Apply a 640 * 480 / 60Hz signal with 16 level grey test pattern, set brightness control at 100%, and contrast control at 50%.
  • Page 19 Display Adjustment HP L1502 LCD HP L2025 HP L2025 HP L2025 Go to cover page 2.6 Switch light probe to Viewing position. 2.7 Move the Lens barrel forward or backward to get clear image as shown in Fig. 4 2.8 Switch light probe to Measuring position. It should be able to indicate colour value on the CA-110.

  • Page 20: Ddc Instructions/Data

    DDC Instructions HP L1502 LCD Go to cover page General Note: The alignment box has already build-in a batteries socket for DDC Data Re-programming Using batteries (9V) as power source. Pull out the socket by 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 remove four screws at the rear of box.
  • Page 21 HP L1502 LCD HP L2025 DDC Instructions HP L2025 HP L2025 Go to cover page Configuration and procedure 3. At the submenu, type the letter of your computer's floppy disk drive There are 2 chips contained OSD string, serial number..etc on the circuit board, main EEPROM which storage all factory followed by :EDID301 (for example, A:\EDID301, as shown in Fig.
  • Page 22 HP L1502 LCD DDC Instructions Go to cover page Re-programming Analog DDC IC Step 3: Modify DDC data (verify EDID version, week, year) 1. Click (new function) icon from the tool bar, bring up Step 1: After initialize alignment box, connecting all cables and Step 1 of 9 as shown in Fig.
  • Page 23 HP L1502 LCD HP L2025 DDC Instructions HP L2025 HP L2025 Go to cover page 6. Click Next , bring up Fig. 22 3. Click Next , bring up Fig. 19. Fig.22 Fig.19 4. Click Next , bring up Fig. 20 7.
  • Page 24 DDC Instructions HP L1502 LCD Go to cover page 3. Click (Write EDID) icon from the tool bar to write DDC data. Bring up "Writing 0%~100%, ready" a progressing bar on the left down corner. 4. Click (Read EDID) to confirm it.
  • Page 25 DDC DATA HP L1502 LCD HP L2025 HP L2025 HP L2025 Go to cover page Flags : Non-interlaced THE DISPLAY DATA CHANNEL ( DDC ) 2B CONTENT : Normal Display, No stereo (FOR analog) : Digital Separate sync. : Negative Vertical Sync.

  • Page 26: Isp Instructions

    Firmware Update for CPU Novatek NT68F633L HP L1502 LCD Go to cover page Configuration and procedure Fig. 4 is provided by Novatek to upgrade the "Easywriter " The software firmware of CPU. It is a windows-based program, which cannot be run in MS-DOS.
  • Page 27 Firmware Update for CPU Novatek NT68F633L HP L1502 LCD Go to cover page Press the Load hex then select the V200.hex as shown in Fig. 8. Fig. 11 From the menu that appears, choose the "NT68F633(64K)" as shown in Fig. 9 Fig.
  • Page 31 HP L1502 LCD HP L2025 HP L2025 HP L2025 Go to cover page Right Fig.3 Examples...

  • Page 32: Function Block

    Function Block Elec. Function Block Elec. Function Block HP1502_Refresh FUNCTION BLOCK Control Board CPU(64K) ISPSCL,SDA NT68F633L IIC/24C16_WP PROM Address/Data/Control SCL,SDA TXO/0/1/2/3/C DDC_WP AC to DC R/G/B/HS/VS Scaler TXE/0/1/2/3/C Inverter gmzan3L Board 3.3V Panel PWR 3.3V 1.8V Reg. BL_EN / Brightness...
  • Page 33 Schematic Diagram Of Scaler-1...
  • Page 34 Schematic Diagram of scaler 2 HP L1502 LCD...
  • Page 35 HP L1502 LCD Schematic Diagram Of Scaler 3...
  • Page 36 HP L1502 LCD Schematic Diagram Of scaler 4...

  • Page 37: Scaler Diagram/Board C.b

    HP L1502 LCD Scaler Board C.B.A-1...

  • Page 40: Power Diagram & C.b

    HP L1502 LCD Go to cover page Power Board Diagram-1...
  • Page 41 PT-002204 T2AH/250V...
  • Page 42 HP L1502 LCD...
  • Page 44 HP L1502 LCD Power Board C.B.A-3...

  • Page 46: Exploded View

    HP L1502 LCD Exploded View Go to cover page...

  • Page 47: Spare/Recommended Parts List

    Spare Parts List HP L1502 LCD Go to cover page Model :AJ6S50/02 2483 222224119876 CER2 1206 Y5V 10V 10U P8020 R Mechanical parts 3307 212211805665 RST SM 0603 RC0603 4K7 PM5 R 2304 223878615649 CER2 0603 X7R 16V 1N PM10 R...
  • Page 48 HP L1502 LCD Spare parts list 6201 933137390215 6203 933215370215 DIO SIG SM BAV99 (PHSE) R 6204 933215370215 DIO SIG SM BAV99 (PHSE) R 6205 933215370215 DIO SIG SM BAV99 (PHSE) R 6206 933215370215 DIO SIG SM BAV99 (PHSE) R...
  • Page 49 HP L1502 LCD Recommended Parts List Go to cover page Model :AJ6S50/02 0030 313815755551 BEZEL ASSY 0040 313815755561 BACK COVER ASSY 0050 313815755202 STAND-HP L1502 PE BAG 0456 313810659671 CARTON-L1502 0450 313815635922 CUSHION-R 0451 313815635932 CUSHION-L 0452 313815635942 P.E.BAG 0453...

  • Page 50: General Product Specification

    HP L1502 LCD GENERAL PRODUCT SPECIFICATION Go to cover page HP L1502 " This specification describes a 15 multi-scan TFT LCD color monitor Contents Product profile Electrical characteristics DDC and EDID User control functions via OSD FOS characteristics Audio Mechanical characteristics...
  • Page 51 313 , 329 313, 329 Red ( x , y ) 631 , 347 641,345 Green ( x , y ) 309, 583 305,567 15 inch LCD MONITOR 8639 000 15367 TYPE : AJ6S50/02 BRAND : HP (L1502) 2004-04-23 HP WU 2004-04-23...
  • Page 52 HP L1502 LCD GENERAL PRODUCT SPECIFICATION Go to cover page Blue ( x , y ) 150 , 088 140, 88 Color Gamut -- % 59.5% Luminance Uniformity (min) Backlight Life (min) 40Khrs 35Khrs Crosstalk (max) 1.20% 1.5% Electrical Characteristics Supply Voltage 3.3V...
  • Page 53 Green GND Blue GND +5 V +5 V Sync GND or Cable detect None DDC Data Horizontal Sync Vertical Sync DDC Clock 15 inch LCD MONITOR 8639 000 15367 TYPE : AJ6S50/02 BRAND : HP (L1502) 2004-04-23 HP WU 2004-04-23...
  • Page 54 HP L1502 LCD GENERAL PRODUCT SPECIFICATION Go to cover page FIGURE 1 VGA CONNECTOR LAYOUT PIN 1 PIN 5 PIN 11 Power Supply Requirements 2.2.1 power supply specifications The power supply for the monitor shall be internal and shall have...
  • Page 55 The monitor shall make use of an LED type indicator located on the front of the monitor. The LED color shall indicate the power states as given in Table 5. 15 inch LCD MONITOR 8639 000 15367 TYPE : AJ6S50/02 BRAND : HP (L1502) 2004-04-23 HP WU 2004-04-23...
  • Page 56 HP L1502 LCD GENERAL PRODUCT SPECIFICATION Go to cover page Monitor Modes and Timing Capability 2.3.1 Format and Timing The monitor shall synchronize with any stable format signal used in the industry with a vertical frequency from 56 Hz to 76 Hz and with a horizontal frequency from 30 kHz to 61 kHz.
  • Page 57 Selecting the " Advanced Menu from the Basic Menu will result in the display of the 15 inch LCD MONITOR 8639 000 15367 TYPE : AJ6S50/02 BRAND : HP (L1502) 2004-04-23 HP WU 2004-04-23...
  • Page 58 Factory Reset, these values will be stored in new user mode. OSD Definitions Philips follow HP’ s requirement to create OSD, and HP approved the OSD sample, if any deviation between specification and sample, should follow up the MP sample as standard.
  • Page 59 Horizontal OSD Position ADJ Scale (FD=50) Vertical OSD Position ADJ Scale (FD=50) OSD Timeout ADJ Scale (FD=30) Cancel Save and Return Factory Reset Exit 15 inch LCD MONITOR 8639 000 15367 TYPE : AJ6S50/02 BRAND : HP (L1502) 2004-04-23 HP WU 2004-04-23...
  • Page 60 HP L1502 LCD GENERAL PRODUCT SPECIFICATION Go to cover page FOS characteristics Test conditions This specification is defined under the following conditions. - Input mode: 1024 x 768/60Hz mode (48.3 KHz) - Warm-up: more than 30 minutes. - Ambient light: 400 -- 600 lux.
  • Page 61 ABS ( A - A ) ¾¾¾¾¾¾¾¾¾ * 100 % <= 1.5 % Pattern 1: Brightness and Uniformity (9 points) 1/10 1/10 15 inch LCD MONITOR TYPE : AJ6S50/02 8639 000 15367 BRAND : HP (L1502) 2004-04-23 HP WU 2004-04-23...
  • Page 62 HP L1502 LCD GENERAL PRODUCT SPECIFICATION Go to cover page Patern 2: Cross talk pattern Gray level 184 (256 Gray level) Pattern 3: Cross talk Pattern Center at Gray level 0 (Black) B’ A’ 15 inch LCD MONITOR TYPE : AJ6S50/02...
  • Page 63 HP L1502 LCD Go to cover page 5.7 Panel Defect Limits This is general specification from HP, if any deviation, HP agree to follow up panel specification. Table 9 lists the countable and rejectable sizes for each type of commonly found defects.
  • Page 64 HP L1502 LCD GENERAL PRODUCT SPECIFICATION Go to cover page Audio No audio function for HP L1502. Mechanical characteristics Tilt base Tilt angle: -5 ° to +30 ° Shipping and Packing Packaging and wrapping shall be sufficient to protect the product against damage or loss during shipment from the supplier to the destination specified in the purchase order.
  • Page 65 6 faces Electrical function ok Test Mechanical function ok Result No serious damage on set appearance (Room temp./-10° c, humidity 70 %) 15 inch LCD MONITOR TYPE : AJ6S50/02 8639 000 15367 BRAND : HP (L1502) 2004-04-23 HP WU 2004-04-23...
  • Page 66 HP L1502 LCD GENERAL PRODUCT SPECIFICATION Go to cover page Environmental characteristics Environmental Requirements 8.1.1 Temperature Ranges Operating Temperature (Independent of altitude) ........5 C to35 Non-Operating Temperature (Independent of altitude) ......-20 C to 60 8.1.2 Humidity Operating (non-condensing) ................. 20% to 80% Non-Operating (38.7...
  • Page 67 IEC 61000-3-3 ( EN 61000-3-2 ) EN 55022:1998 EN 55024 consisting of: IEC 61000-4-2 / -3 /-4/ -5 / -6 / -8 / -11 15 inch LCD MONITOR 8639 000 15367 TYPE : AJ6S50/02 BRAND : HP (L1502) 2004-04-23 HP WU 2004-04-23...
  • Page 69 TELEVISION/MONITOR SAFFTY GUIDELINES FOR THE PROFESSIONAL SERVICE TECHNICIAN Safety Checks After the original service problem has been corrected,a complete safety check should be made. Be sure to check over the entire set, not just the areas 6. New picture tubes are specifically designed to withstand higher operathng where you have worked.

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