This is the ONLY copy of this manual I could find for a realistic price. Even Panasonic could not provide me with one.
The PDF is a very good copy and it helped me diagnose and find the fault with the unit I have.
Text excerpt from page 3 (click to view)
DPC-X311/X517/X612
DISASSEMBLY FOR REPAIR
How to Remove Knobs
The PLAY and the STOP keys are available for removal by pushing and turning them with taking care of bar of the top cabinet ass'y.
The PLAY and the STOP keys are available for fixation by hooking and pushing them with taking care of bar of the top cabinet ass'y.