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3 Repair Instructions
Warning!
Some tests and measurements require that the power cable is plugged in with the casing
removed. This is only allowed for legally authorized electricians and extra caution must be taken
because of exposed live parts.
3.1 Removing the cover and casing
Start with disconnecting the power cable before removing cover and casing.
Unscrew the cover locking screw (Torx 20) on the backside
Slide the cover towards the back of the device.