Hello and thank you for choosing JA for your support needs. Sorry for the issue, to resolve it. Please follow the instruction below:
Simply make sure the cutting device is re-located correctly, and then turn the can activator section back over the top. This then allows the solenoid to activate the cam, thus moving the cutting device. All this can be done with the head in 'park' position with access through the front transparent flap.
Ok, Sir here is a link to the Service Manual below.
Free of charge.
Please consider a Positive Rating for the Service Received.