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CAT S22 Flip Daughterboard Replacement

Introduction

This guide will go over replacing the CAT 22 Flip daughterboard. The daughterboard is responsible for connecting the motherboard to the touch screen, back screen, and cameras.

A faulty daughterboard can cause a myriad of issues from frozen touch screen to camera issues.

To be sure the daughterboard is the issue, check the CAT S22 Flip troubleshooting guides

What you need

  1. CAT S22 Flip Daughterboard Replacement, Back Screen: step 1, image 1 of 3 CAT S22 Flip Daughterboard Replacement, Back Screen: step 1, image 2 of 3 CAT S22 Flip Daughterboard Replacement, Back Screen: step 1, image 3 of 3

    • Insert a metal spudger into the seam of the phone frame.

    • Apply a downward force on the metal spudger to create a gap.

    Edit

  2. CAT S22 Flip Daughterboard Replacement: step 2, image 1 of 1

    • Insert a jimmy into the gap.

    • Use the jimmy to wedge the front panel free from the frame.

    • There is adhesive binding the front panel to the frame, so you will have to apply a moderate amount of force to get them apart.

    Edit

  3. CAT S22 Flip Daughterboard Replacement: step 3, image 1 of 1

    • Use a J00 JIS screwdriver to remove the four wide 3.3 mm-long screws.

    • Use a J00 JIS screwdriver to remove the four narrow 3.3 mm-long screws.

    Edit

  4. CAT S22 Flip Daughterboard Replacement: step 4, image 1 of 2 CAT S22 Flip Daughterboard Replacement: step 4, image 2 of 2

    • Use a metal spudger to dislodge the lip holding the frame together.

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  5. CAT S22 Flip Daughterboard Replacement: step 5, image 1 of 1

    • Use the flat end of a spudger to gently disconnect the back screen press connector.

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  7. CAT S22 Flip Daughterboard Replacement: step 6, image 1 of 1

    • Gently remove the back screen.

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  8. CAT S22 Flip Daughterboard Replacement, Daughterboard: step 7, image 1 of 1

    • Disconnect the two touch-screen press connectors with the flat end of a spudger.

    • This only take a light force. To much force may damage the daughtboard components. This applies to all the ribbon cables of the CAT S22 daughterboard.

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  9. CAT S22 Flip Daughterboard Replacement: step 8, image 1 of 1

    • Disconnect the front-facing camera ribbon cable using the spudger.

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  10. CAT S22 Flip Daughterboard Replacement: step 9, image 1 of 1

    • Use a pair of tweezers to gently remove the front-facing camera.

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  11. CAT S22 Flip Daughterboard Replacement: step 10, image 1 of 1

    • Use the spudger to remove the back-facing camera press connector.

    Edit

  12. CAT S22 Flip Daughterboard Replacement: step 11, image 1 of 3 CAT S22 Flip Daughterboard Replacement: step 11, image 2 of 3 CAT S22 Flip Daughterboard Replacement: step 11, image 3 of 3

    • Place the spudger at one side of the metallic connector of the motherboard ribbon and apply a light upward force.

    • Repeat the previous action across the sides of the connector.

    Edit

  13. CAT S22 Flip Daughterboard Replacement: step 12, image 1 of 1

    • Remove the red rubber seal connected to the motherboard ribbon cable.

    Edit

  14. CAT S22 Flip Daughterboard Replacement: step 13, image 1 of 3 CAT S22 Flip Daughterboard Replacement: step 13, image 2 of 3 CAT S22 Flip Daughterboard Replacement: step 13, image 3 of 3

    • Insert an opening pick between the frame and the top of the daughterboard. This spot should be where you removed the motherboard ribbon cable and should have the least amount of adhesive.

    • Move the opening pick down, slicing through the adhesive.

    • While moving the pick down, apply a ligh upward pressure to fully seperate the the daughterboard from the frame.

    Edit

  15. CAT S22 Flip Daughterboard Replacement: step 14, image 1 of 3 CAT S22 Flip Daughterboard Replacement: step 14, image 2 of 3 CAT S22 Flip Daughterboard Replacement: step 14, image 3 of 3

    • Insert the opening pick between the frame and the top right of the daughterboard. There may be some resistence inserting the pick.

    • Move the opening pick down, slicing through the adhesive.

    • While moving the pick down, apply a ligh upward pressure to fully seperate the the daughterboard from the frame.

    Edit
Conclusion

To reassemble your device, follow these instructions in reverse order. It is recommended to add new adhesive to between the daughterboard and frame

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