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Irest SL A28-1 Massage Chair Jerking Bump Fix

Introduction

This guide is about how to fix the jerking bump.

No parts need to be replaced.

What you need

  1. Irest SL A28-1 Massage Chair Jerking Bump Fix, Which chair is it ?: step 1, image 1 of 1

    • The chair is one like this.

    Edit

  2. Irest SL A28-1 Massage Chair Jerking Bump Fix, How to open the chair: step 2, image 1 of 3 Irest SL A28-1 Massage Chair Jerking Bump Fix, How to open the chair: step 2, image 2 of 3 Irest SL A28-1 Massage Chair Jerking Bump Fix, How to open the chair: step 2, image 3 of 3

    • Fold backrest forward by pressing the release tab in and under the chair (Arrowed) and push the backrest forward.

    • On the two last pictures you can see the release lock and tap after the backrest is folded forward

    Edit

  4. Irest SL A28-1 Massage Chair Jerking Bump Fix, Remove the screws: step 3, image 1 of 2 Irest SL A28-1 Massage Chair Jerking Bump Fix, Remove the screws: step 3, image 2 of 2

    • Remove the screw for the cord inlet (Marked as 1) and remove the cord cover

    • Remove the 5 screws (marked 2) for the back cover - Please note they are NOT all the same size, so pay attention to the positions

    Edit

  5. Irest SL A28-1 Massage Chair Jerking Bump Fix, Remove the cord and back cover: step 4, image 1 of 1

    • With the cord cover (#1 in previous step) removed, remove the two connectors

    • The connectors on my model was protected with plastic strips to prevent me from releasing the lock tap - didn't work - I took the picture AFTER I had removed the cover so it was easier to see what the connectors looked like

    • Remove the strips or pull them towards the wires (Upwards) and use a flathead screwdriver to prise the lock open and remove the connector

    • Remove the back cover

    Edit

  6. Irest SL A28-1 Massage Chair Jerking Bump Fix, Why was there a jerky bump ?: step 5, image 1 of 1

    • In my case I looked at the mechanism and saw no immediate failures

    • I then noticed that a black strap (Arrowed) was showing signs of being curled/crumbled

    • Further examination shows that the strap, which goes from top to bottom, was not aligned 100 % centered between the massage wheels (I try to show that with the red line) and the strap had become a little loose

    • The result was the that the right wheel was sort of "picking up" the strap, so both wheels was on the same side of the strap

    • At some point the right massage wheel had to cross back again over the strap hereby crumbling it and giving this jerky bump.

    Edit

  7. Irest SL A28-1 Massage Chair Jerking Bump Fix, Fix the issue - tighten and move the strap a little: step 6, image 1 of 2 Irest SL A28-1 Massage Chair Jerking Bump Fix, Fix the issue - tighten and move the strap a little: step 6, image 2 of 2

    • The fix is to tighten the strap - there are two ways

    • 1 - Remove the frame with wheels and rollers and re-align + tighten the strap

    • 2 - Tighten and partly re-align the strap

    • I opted for solution 2

    • I tightened the strap at the botton of the frame, because this is where I had space to manouvre

    • I positioned the strap more to the left so it got centered

    • I used a 1.5 mm drill to prepare a whole in the frame so the plate screw (See picture 2) does not rapture the woodden frame

    • I used a plate screw to secure the strap in the new position

    Edit
Conclusion

To reassemble your device, re-connect the cable connectors

Then place the back cover again, making sure it fits without pinching something

Finally place the cable/cord cover

Author

with 3 other contributors

Jan Carsten Jorgensen

Member since: 02/28/16

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