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Projector - Vivitek D855ST DMD Chip Board Replacement

Introduction

This guide will show you have to replace the DMD board chip.

What you need

  1. Projector - Vivitek D855ST DMD Chip Board Replacement, Chip Board: step 1, image 1 of 3 Projector - Vivitek D855ST DMD Chip Board Replacement, Chip Board: step 1, image 2 of 3 Projector - Vivitek D855ST DMD Chip Board Replacement, Chip Board: step 1, image 3 of 3

    • First grab a 00 Phillips screwdriver remove the lamp cover.

    • Then loosen the 3 captive screws holding the lamp in the projector with a standard Phillips screwdriver.

    Edit

  2. Projector - Vivitek D855ST DMD Chip Board Replacement, Remove the housing: step 2, image 1 of 2 Projector - Vivitek D855ST DMD Chip Board Replacement, Remove the housing: step 2, image 2 of 2

    • Remove the following 8 screws securing the bottom housing.

    • Remove 3 screws securing the top housing.

    Edit

  3. Projector - Vivitek D855ST DMD Chip Board Replacement, Remove the top housing: step 3, image 1 of 2 Projector - Vivitek D855ST DMD Chip Board Replacement, Remove the top housing: step 3, image 2 of 2

    • Use the flat end of a spudger to pry the top housing around the sides.

    • Slightly lift from the front and push it toward the rear of projector to free the mounting tabs.

    Edit

  4. Projector - Vivitek D855ST DMD Chip Board Replacement, Remove top shield: step 4, image 1 of 1

    • Remove the following 8 screws of various sizes on the top shield.

    • Remove the screw in red very last. It's tight and after removing the others, you can swivel the shield enough to loosen that screw without stripping it.

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  6. Projector - Vivitek D855ST DMD Chip Board Replacement, Remove main board: step 5, image 1 of 3 Projector - Vivitek D855ST DMD Chip Board Replacement, Remove main board: step 5, image 2 of 3 Projector - Vivitek D855ST DMD Chip Board Replacement, Remove main board: step 5, image 3 of 3

    • Remove one screw and the carefully disconnect 2 ribbon cables and 8 cable connectors from the main board.

    • Remove the 6 video cable standoffs from the rear of the projector. Needle-nose pliers will loosen them enough then a Torx-8 driver fits perfect to loosen them the rest of the way

    • Carefully push the rear of the video ports inward to push the board enough forward and lift up.

    • Lift up and disconnect the cable connector on the bottom of the board to the power supply.

    Edit

  7. Projector - Vivitek D855ST DMD Chip Board Replacement, Remove power supply: step 6, image 1 of 3 Projector - Vivitek D855ST DMD Chip Board Replacement, Remove power supply: step 6, image 2 of 3 Projector - Vivitek D855ST DMD Chip Board Replacement, Remove power supply: step 6, image 3 of 3

    • Remove 2 screws on the right and left sides toward the bottom securing the power supply to the chassis.

    Edit

  8. Projector - Vivitek D855ST DMD Chip Board Replacement, Disconnect the power supply: step 7, image 1 of 2 Projector - Vivitek D855ST DMD Chip Board Replacement, Disconnect the power supply: step 7, image 2 of 2

    • Disconnect the cable connectors from the left and right sides under the power supply

    Edit

  9. Projector - Vivitek D855ST DMD Chip Board Replacement, Remove the lens unit: step 8, image 1 of 1

    • Remove the following 3 identical screws to remove the lens unit.

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  10. Projector - Vivitek D855ST DMD Chip Board Replacement, Remove the heatsink: step 9, image 1 of 3 Projector - Vivitek D855ST DMD Chip Board Replacement, Remove the heatsink: step 9, image 2 of 3 Projector - Vivitek D855ST DMD Chip Board Replacement, Remove the heatsink: step 9, image 3 of 3

    • Remove one screw and the tension bar holding the heatsink to the DMD Board

    • Pull back the shielding tape from the heatsink to the lens unit.

    Edit

  11. Projector - Vivitek D855ST DMD Chip Board Replacement, Access to DMD board: step 10, image 1 of 3 Projector - Vivitek D855ST DMD Chip Board Replacement, Access to DMD board: step 10, image 2 of 3 Projector - Vivitek D855ST DMD Chip Board Replacement, Access to DMD board: step 10, image 3 of 3

    • Remove 4 screws securing the DMD board to the lens unit

    • Pull it gently apart. It is held by thermal paste.

    Edit
Conclusion

To reassemble your device, follow these instructions in reverse order.

2 other people completed this guide.

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dustind

Member since: 04/26/11

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