User manual HP L1902 SERVICE MANUAL

[. . . ] Input/Output Specification 4. 1 Input Signal Connector 4. 1. 1 Analog D-SUB Connector 4. 2 Factory Preset Display Modes --------------------------------------------------------09 4. 3 Power Supply Requirements ----------------------------------------------------------09 ------------------------------------------------------09 4. 3. 1 Input/Output Requirements 4. 3. 2 Inverter Max Brightness 4. 3. 3 Inverter Min Brightness -----------------------------------------------------------10 ------------------------------------------------------------10 ------------------------------------------------11 5. Panel Specification (LG E03/AU EN04) 5. 1 General Feature -------------------------------------------------------------------------11 ---------------------------------------------------------------12 5. 2 Optical Characteristics 6. Block Diagram -----------------------------------------------------------------------------------14 ----------------------------------------------------------------14 6. 1 Monitor Exploded View 6. 2 Software Flow Chart ---------------------------------------------------------------------15 Page 2 of 69 HP L1902 Service Manual 6. 3 Electrical Block Diagram 6. 3. 1 Scalar Board ----------------------------------------------------------------16 ----------------------------------------------------------------------16 -----------------------------------------------------------17 6. 3. 2 Inverter/Power Board 7. Schematic -----------------------------------------------------------------------------------------19 7. 1 Scalar Board ----------------------------------------------------------------------------19 7. 2 Inverter/Power Board 7. 3 Key Pad Board 8. PCB Layout --------------------------------------------------------------25 -------------------------------------------------------------------------26 --------------------------------------------------------------------------------------27 -----------------------------------------------------------------------------27 ----------------------------------------------------------------30 8. 1 Main Board 8. 2 Inverter/Power Board 8. 3 Keypad Board -------------------------------------------------------------------------25 9. [. . . ] The Auto Adjust Key is used to automatically set the H Position, V Position, Clock and Phase. - Select Key: Select key is into OSD sub-menu hot key when OSD turn on. - Power Indicator: Green — Power On mode. Blank — Power Off Mode. CONTROL BUTTONS Select Button Down / Auto Button Up Button On/Off Switch Page 6 of 69 HP L1902 Service Manual 3. 3 Adjust The Picture 1. 2. Brightness Adjust the brightness. Adjust the contrast Contrast 3. Adjust the: Auto Adjustment: Adjusts the main settings and produces a stable, centered image. Image Control H-Position: horizontal position of the screen image. V-Position: vertical position of the screen image. Clock: frequency of the pixel clock to minimize vertical bar. Phase: phase value to minimize horizontal jitters. 9300K: recall 9300K color 6500K: recall 6500K color SRGB: recall SRGB color Custom Color: adjusts the color tint of white, and the red, green, and blue (RGB) mix for colors. Power Saver: enable/disable power saving Power On Recall: enable/disable power recall Mode Display: enable/disable mode display Sleep Timer: set sleep timer Basic Menu: set to basic menu OSD (on Screen Display) settings: adjusts the H/V position, timeout, On Screen Display window. Resets the display to original factory settings for color, brightness, phase, and clock. Exit the current OSD window. 3. Color 4. 5. Language Management 6. OSD Control Factory Reset Exit 7. 8. Page 7 of 69 HP L1902 Service Manual 4. Input/Output Specification 4. 1 Input Signal Connector 4. 1. 1 Analog D-SUB Connector PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 MNEMONIC RV GV BV NC GND RG GG BG +5 V SG NC SDA HS VS SCL Red Video Green Video Blue Video None Ground (DDC Return) Red GND Green GND Blue GND +5 V (from PC) Sync Ground None DDC Data Horizontal Sync Vertical Sync DDC Clock SIGNAL VGA connector layout PIN 1 PIN 5 PIN 11 Page 8 of 69 HP L1902 Service Manual 4. 2 Factory Preset Display Modes Preset 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Pixel Format 640 x 480 640 x 480 640 x 480 720 x 400 800 x 600 800 x 600 800 x 600 832 x 624 1024 x 768 1024 x 768 1024 x 768 1152 x 870 1152 x 900 1280 x 1024 1280 x 1024 Horz Freq (KHz) 31. 469 37. 861 37. 500 31. 469 37. 879 48. 077 46. 875 49. 726 48. 363 56. 476 60. 023 68. 68 71. 71 63. 98 79. 97 Horz Polarity + Vert Freq (Hz) 59. 940 72. 809 75. 000 70. 087 60. 317 72. 188 75. 000 74. 551 60. 004 70. 069 75. 029 75. 06 76. 05 60. 02 75. 02 Vert Polarity + + + + ± + + + Pixel Clk (MHz) 25. 175 31. 500 31. 500 28. 322 40. 000 50. 000 49. 500 57. 284 65. 000 75. 000 78. 750 100. 000 105. 561 108. 000 135. 000 Source VGA VESA VESA VGA VESA VESA VESA MAC VESA VESA VESA Mac Sun VESA VESA + + ± + + + 4. 3 Power Supply Requirements 4. 3. 1 Input / Output Requirements PARAMETER AC Input Voltage AC Input Frequency AC Input Current Inrush Current Leakage Current Output voltage / current Output power Efficiency Saving Mode 90 to 264V 47 to 63 Hz 1. 5A MAX 60A MAX AT 264VAC COLD START 3. 5 mA MAX and less than 0. 25mA at 100Vac 12V / 3. 5A , 45W Max >80% <2W Max @5V/0. 1A , 12V/0A 5V / 1. 5A RANGE Page 9 of 69 HP L1902 Service Manual 4. 3. 2 Inverter Max Brightness (Vadj:4. 5v), LOAD=100KΩX4 ITEM Input voltage Input current Output Current Frequency H. V open H. V Load Protect delay time SYMBOL Vin Iin Iout F Vopen Vload PDT 6 40 1350 550 0. 4 (ROOM TEMPERATURE 25℃ ±4℃) MIN. 13. 2 1870 7 60 1750 750 4 UNIT V mA mA KHZ Vrms Vrms Sec FOR 4LOAD FOR 1 LOAD FOR 1 LOAD NO LOAD RL=100KΩ REMARK 4. 3. 3 Inverter Min Brightness (Vadj:0. 0v), LOAD=100KΩX4 ITEM input voltage input current Output Current Frequency H. V open H. V Load SYMBOL Vin Iin Iout F Vopen Vload (ROOM TEMPERATURE 25℃ ±4℃) MIN. 13. 2 550 4 60 1750 450 UNIT V mA mA KHZ Vrms Vrms FOR 4 LOAD FOR 1 LOAD FOR 1 LOAD NO LOAD RL=100KΩ REMARK Page 10 of 69 HP L1902 Service Manual 5. PANEL SPECIFICATION 5. 1 General Feature LG LM190E03 Active Screen Size Outline Dimension Pixel Pitch Pixel Format Interface Color Depth Luminance, White Viewing Angle(CR>10) Power Consumption Weight Display Operating Mode Surface treatments 19. 0 inches(481. 84mm) diagonal 404. 2(H) ╳ 330. 0(V) ╳ ╳ 20. 0(D) mm(Typ. ) 0. 098*RGB(H) LVDS 2Port 0. 294(V)mm 1280 horizontal By 1024 vertical Pixels. [. . . ] Meanwhile press MENU the OSD screen will located at LEFT TOP OF PANEL. 4、Bias adjustment : Set the Contrast to 80 to 90. Adjust the Brightness 5、Gain adjustment : Move cursor to “-F-” and press MENU key A、Adjust 9300 color-temperature 1、Switch the Chroma-7120 to RGB-Mode (with press “MODE” button ) 2、Switch the MEM. Channel to Channel 3 ( with up or down arrow on chroma 7120 ) 3、The LCD-indicator on chroma 7120 will show x = 283 ±10, y = 298 ±10, Y = 210 ±10 cd/m2 4、Adjust the RED of color1 on factory window until chroma 7120 indicator reached the value R=100 5、Adjust the GREEN of color1 on factory window until chroma 7120 indicator reached the value G=100 6、Adjust the BLUE of color1 on factory window until chroma 7120 indicator reached the value B=100 Page 36 of 69 HP L1902 Service Manual 7、Repeat above procedure ( item 4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2 B、Adjust SGB color-temperature 1、Switch the chroma-7120 to RGB-Mode (with press “MODE” button ) 2、Switch the MEM . Channel to Channel 4( with up or down arrow on chroma 7120 ) 3、The LCD-indicator on chroma 7120 will show x = 313 ±10, y = 329 ±10, Y = 210 ±10 cd/m2 4、Adjust the RED of color3 on factory window until chroma 7120 indicator reached the value R=100 5、Adjust the GREEN of color3 on factory window until chroma 7120 indicator reached the value G=100 6、Adjust the BLUE of color3 on factory window until chroma 7120 indicator reached the value B=100 7、Repeat above procedure ( item 4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2 C、Press reset key and Turn the Power-button “off to on” to quit from factory mode. 11. EDID CONTENT x0 00: 16: 32: 48: 64: 80: 96: 112: 00 02 11 01 13 34 4C 00 x1 FF 0E 50 01 00 30 1E 68 x2 FF 01 54 01 54 32 53 70 x3 FF 03 01 0E 31 0E 20 x4 FF 68 01 11 32 00 4C x5 FF 26 80 01 00 33 0A 31 x6 FF 1E 81 30 00 34 20 39 x7 00 78 80 2A 1E 0A 20 30 x8 22 01 00 00 20 20 32 x9 F0 01 98 00 20 20 0A xA 1E 50 01 51 00 00 20 20 xB 26 A3 01 00 FF 00 20 20 xC 01 57 01 2A 00 00 00 20 xD 01 4C 01 40 43 00 20 xE 01 9D 01 30 4E 00 00 xF 01 25 01 70 43 32 FC E5 EE A1 AD EF FD 00 Page 37 of 69 HP L1902 Service Manual 12. [. . . ]