Introduction

After changing the sandpaper, the device inexplicably stopped working. It turned out that dust in the main switch was preventing the contacts from closing.

The defect was fixed by removing and “blowing out” the main switch.

What you need

Step 1 Remove screws

Device no longer starts: Clean the main switch, Remove screws: step 1, image 1 of 1

Make sure that the device is disconnected from the power supply. (i.e., the power plug is not plugged into the power outlet)
Remove sandpaper holder (green)
Remove all 10 screws (red) using a PH2 screwdriver

Translate

Step 2 Remove housing

Device no longer starts: Clean the main switch, Remove housing: step 2, image 1 of 2

Device no longer starts: Clean the main switch, Remove housing: step 2, image 2 of 2

Remove blue plastic housing.

Translate

Step 3 Remove the switch

Device no longer starts: Clean the main switch, Remove the switch: step 3, image 1 of 3

Device no longer starts: Clean the main switch, Remove the switch: step 3, image 2 of 3

Device no longer starts: Clean the main switch, Remove the switch: step 3, image 3 of 3

Push the orange slider upwards to remove it
Lift the switch

Translate

Step 4 Disconnect the power cable

Device no longer starts: Clean the main switch, Disconnect the power cable: step 4, image 1 of 1

Pull off the plug contacts of the switch. This can be pretty tough. A pair of needle-nose pliers can help.

Translate

Step 5 Clean or replace the switch

Device no longer starts: Clean the main switch, Clean or replace the switch: step 5, image 1 of 2

Device no longer starts: Clean the main switch, Clean or replace the switch: step 5, image 2 of 2

Toggle the switch several times, then blow it out. Ideally, use a pressurized air gun, but blowing on it may also work.
If possible, use a multimeter to test whether the switch is working reliably again.
If necessary, install a new switch. Unfortunately, we do not currently know of any suppliers.

Translate

Step 6 notes for the assembly

Device no longer starts: Clean the main switch, notes for the assembly: step 6, image 1 of 2

Device no longer starts: Clean the main switch, notes for the assembly: step 6, image 2 of 2

Make sure that the switch is installed correctly. “1” is facing away from the operator. Observe this for both the black switch and the orange slider.
Make that no strands are pinched and that the sliding contacts (green) are positioned correctly in the holders.

Translate