Disassembly of DP-9900Plus/DP-9900 
3-13 
2.  Disassemble the upper rear cover. 
3.  Disconnect the power cable and data line from the hard disk and then release the 
four screws that secure the hard disk. 
 
3.9.  Disassembly of Power Conversion Board 
1.  Release the four M4×8 screws on the lower rear cover. Then disconnect cables 
from the power conversion board and remove the lower rear cover with the power 
conversion board on it.   
 
2.  Remove the power conversion board from the lower rear cover.