factory technician level - complete with board views :
( removing chassis from cabinet , only thing missing ) ;
on weekends , staff is not available so - be patient .
Excellent manual. In addition to the information I needed was a complete description of both electronic and mechanical devices.
Excellent site.
Thank you very much.
very good and complete manual , it is in english and german is perfect for repair.
Text excerpt from page 9 (click to view)
7. Replacing the main PCB
Note: The main PCB contains a lithium battery for memory back-up. Please remove the jumper before replacing the PCB. And make sure that the jumper is reset on new main PCB after replacing the PCB. Because no jumper is set on a spare part of the main PCB.