Download the manual,its all in there,
if you can enter engineering using the default code then follow the entry time change/ instructions,its default is 30 secs.
If you cannot enter engineering using the default code then you will have to restore factory defaults and reprogramme,.
Again its all in the manual.
The volume pot is on the pcb above the aux fuse,this is also pointed out on the pcb illustration in the manual.
Please be aware there's mains voltages present within the panel,.
If you are unsure get someone in.
Try this... enter (1234) if the CALL ENGR LED illuminates then you are in engineering,.
Press (0) twice to return to unset.
no name
April 2012