User manual SHARP LL-T1810A OPERATION MANUAL

[. . . ] SERVICE MANUAL LCD COLOR MONITOR MODEL LL-T1810A CONTENTS CHAPTER 1. TROUBLE SHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . WAVE FORM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] 2 3 4 OSD Menu disappears) (MENU 1 Note: The OSD Menu automatically disappears approximately 20 seconds after the last command. MENU 1: ADJUSTMENT ADJUSTMENT [ CLOCK PHASE H-POS V-POS 128 8 91 38 AUTO ] ADJUSTING THE BACKLIGHT The backlight brightness can be adjusted. Carry out the commands without the On Screen Display (OSD) Menu displayed. If the OSD Menu is displayed, press the MENU button (several times may be required) and begin when the OSD Menu has disappeared. Without the OSD Menu being displayed, push the or the button. At the bottom of the screen the BRIGHT bar will appear. Adjust by pressing the [ 1280x1024 V : 60Hz H : 64kHz MANUAL: Individual menu options are manually adjusted. AUTO: Every menu option is automatically adjusted button to select AUTO. Notes: · Press the · To choose a menu option: SELECT button · To go to MENU 2: MENU button button (darker) or button (lighter). ] The BRIGHT bar automatically disappears approximately 3 seconds after the last command. CLOCK The figure below demonstrates how to adjust so that vertical flicker noise is not emitted. ( buttons) BRIGHT (brightness) Total screen brightness can be adjusted while watching the color pattern. ( buttons) Color pattern Vertical flicker noise PHASE The figure below demonstrates how to adjust so that horizontal flicker noise is not emitted. ( buttons) Note: Adjustments to PHASE should be made only after CLOCK has been correctly set. CONT (Contrast) While watching the color pattern, adjustments can be made so that all graduations appear. ( buttons) MENU 3: WHITE BALANCE WHITE BALANCE can be adjusted as necessary. (As adjustments are made before shipment, there is no real necessity for further alteration. ) WHITE BALANCE · WARM USER [ COOL · R-CONT G-CONT B-CONT 1280x1024 V : 60Hz H : 64kHz ] Horizontal flicker noise H-POS (horizontal positioning) and V-POS (vertical positioning) To center the screen image within the boundaries of the screen, adjust the left-right (H-POS) values and the up-down (V-POS) values. ( buttons) Screen frame Notes: · Not all graduations for COOL and WARM can be displayed. To display all graduations, set to STD. · Selecting USER will display the setting values for R-CONT, G-CONT and B-CONT, enabling fine adjustments. · To choose a menu option: SELECT button · To go to MENU 4: MENU button COOL ­ STD . . . Color tone slightly bluer than standard . . . Color tone slightly redder than standard . . . Color tone redder than standard MENU 2: GAIN CONTROL BRIGHT (brightness) and CONT (contrast) are optimized before shipment, but depending on the type of computer being used, further adjustment may be necessary. GAIN CONTROL [ BRIGHT COMT 128 128 AUTO ] ­ WARM USER R-CONT G-CONT B-CONT button for blue-green button for red button for purple button for green button for yellow button for blue 1280x1024 V : 60Hz H : 64kHz MENU 4: MODE SELECT The resolution can be adjusted MODE SELECT [ 400LINE EXPAND LEVEL 640 OFF MAC ] MANUAL: Individual menu options are manually adjusted. AUTO: Every menu option is automatically adjusted using the Auto Gain Control* function, button to select AUTO. Notes: · Press the · To choose a menu option: SELECT button · To go to MENU 3: MENU button *Auto Gain Control function The Auto Gain Control adjusts contrast and brightness based on the brightest color of the image displayed. If you are not using the Adjustment Pattern it is necessary to have an area of at least 5 mm x 5 mm of white image displayed, and if not adjustments may not be possible. (In such case, [OUT OF ADJUST] will appear and setting values remain unchanged. ) 1280x1024 V : 60Hz H : 64kHz Notes: · To choose a menu option: SELECT button · When adjustment complete: MENU button INPUT (Input mode) The input mode can be set ( VESA: VESA mode MAC: Power Macintosh mode buttons) Display mode Power Macintosh series 640 x 480 832 x 624 1024 x 768 1152 x 870 Sun Ultra series 1024 x 768 Hsync 35. 0kHz 49. 7kHz 60. 2kHz 68. 7kHz 48. 3kHz 53. 6kHz 53. 6kHz 1152 x 900 61. 8kHz 71. 8kHz 1280 x 1024 71. 7kHz 81. 1kHz Vsync 66. 7Hz 74. 6Hz 75. 0Hz 75. 0Hz 60. 0Hz 66. 0Hz 70. 0Hz 66. 0Hz 76. 1Hz 67. 2Hz 76. 0Hz Dot frequency 30. 2MHz 57. 3MHz 80. 0MHz 100. 0MHz 64. 13MHz 70. 4MHz 74. 25MHz 108. 01MHz 117. 01MHz 117. 01MHz 134. 99MHz 400 LINES (degree of resolution) You can specify the horizontal resolution of a 400-line screen when using US text, etc. ( buttons) 640 720 640 x 400 dot mode 720 x 400 dot mode (US text etc. ) Note: As the resolution input for other than 400 lines is done automatically, there is no need to set it. EXPAND (Screen expansion) For display modes of less than 1280 x 1024 pixels, the display can be expanded if desired. [. . . ] (See waveform diagram 17. ) Yes Check color signal processing circuit around IC 27. Check OSD display circuit around IC31, IC33 and IC34. LCD screen is normal at composite syn. Yes GAIN CONTROL AUTO operates properly?Yes No Check synchronous signal processing circuit around IC18, IC19, IC21, IC22 and IC38. Digital color signal inputs and outputs of IC23 and IC27 are normal?(See waveform diagrams 13, 14 and 15. ) No No Check color signal processing circuit around IC23 and IC27. Yes Check microprocessor control circuit around IC27, IC28 and IC34. LCD screen adjustment settings are stored in memory properly? [. . . ]