Ogawa OG8020 Maintenance Service Manual page 30

Locate the two cable ties.
D: Disconnect all the connecters first. Use long nose pliers clamp the 3D PCB support,
meanwhile lift the 3D PCB up, then the 3D PCB unlocked. Then the 3D PCB can be
removed.( As pictured below show )
All the connectors have
been disconnected.
Locate the six screws which secure the 3D PCB box cover.
3D PCB box cover has been detached.
Long nose pliers clamp
the PCB support to
3D PCB has been
detached.