SIGNA MR355 / SIGNA MR360Service Manual5856356-3EN Revision 5.0 Basic Service Documentation. Copyright General Electric Company. Object ID: 00000018WHA30999BGYZTopic ID: id_2002113 Version: 11.0Date: Feb 21, 2021 9:03:36 PMSetting up grafidy hardware ProcedureUnfold the six-channel Grafidy fixture and lock the arms into place (90° from center plate). Note: Make sure the six-channel Grafidy fixture is firmly pushed into the slit of foam support without any gap. Connect the P-port connector to port .Center the laser cross hairs on top of the fixture.