3M Multimedia Projector MP8620, Руководство по обслуживанию

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3M Multimedia Projector MP8620 Table of Contents
3M 1999
ii
3-4. General/Projection Image Troubleshooting .......................................................................................3-7
3-4-1. Image is Disturbed or Unstable .............................................................................................3-7
3-4-2. No Computer Image Projected ..............................................................................................3-7
3-4-3. No Video Image Projected ....................................................................................................3-7
3-4-4. Mouse Does Not Work ..........................................................................................................3-8
3-4-5. Image Off Center ...................................................................................................................3-8
3-4-6. Cannot Get Entire Image on the Screen ................................................................................3-8
3-4-7. Washed Out Image ................................................................................................................3-8
3-4-8. Humming Noise. Slowly Passing Horizontal Bars ...............................................................3-9
3-4-9. No Power. Power Shuts Off During Presentation .................................................................3-9
4. T heory and Diagrams ..................................................................................................................................4-1
4-1. Overview ............................................................................................................................................4-1
4-2. Theory of Operation ...........................................................................................................................4-1
4-2-1. Power Supply Circuit ............................................................................................................4-1
4-2-2. Video Input and AD Conversion ...........................................................................................4-1
4-2-3. RGB Input and AD Conversion ............................................................................................4-2
4-3. Color Theory ......................................................................................................................................4-3
4-3-1. Color ......................................................................................................................................4-3
4-3-2. Electromagnetic Spectrum ....................................................................................................4-3
4-4. LCD Structure Theory ........................................................................................................................4-4
4-4-1. LCD Cells ..............................................................................................................................4-4
4-4-2. How Light Passes Through An LCD ....................................................................................4-4
4-4-3. Example Projection ...............................................................................................................4-4
4-5. Lamp Theory ......................................................................................................................................4-5
4-6. Keystone Correction ...........................................................................................................................4-6
4-7. Optical System Layout .......................................................................................................................4-7
4-8. Connection Diagrams .........................................................................................................................4-8
4-9. Wiring Diagrams ................................................................................................................................4-9
4-10. Internal Cabling Pinout Tables .........................................................................................................4-10
4-10-1. Interface Board Connector Locations .................................................................................4-10
4-10-2. Audio Board Connector Locations ......................................................................................4-11
4-11. Computer/Video/Audio Connections ...............................................................................................4-12