Disassembling the platic upper housing from then bottom plate ^
- Unscrew nuts and bolts,
- Remove the two supports which are holding the nuts and bolts...

 

 

Separating the upper housing from the print mechanism ^
- Insert a small screwdriver between the lips of the plastic support
- softly press the lips outwards each other...

 

 

       

Separated upper part and internals ^