45487001TH Rev.1 7-13 /Oki Data CONFIDENTIAL 7. Connection diagrams7.3 F/W version number7.3.1 Maintenance board indication stampIn accordance with the following list, a specified part number is stamped on the maintenanceboard indication field on PU/CU board.Series No.Stamp No.(Maintenance BoardSeries No.)Board 99M(YU)Series No. Use for1 451020 [01] 99M-1 (45075601) B721 ODA2 451020 [02] 99M-1 (45075601) B721 OEL/AOS3 451020 [03] 99M-1 (45075601) B731 ODA4 451020 [04] 99M-1 (45075601) B731 OEL/AOS5 451020 [05] 99M-1 (45075601) ES7131 OEL/AOS6 451020 [06] 99M-1 (45075601) MPS 5501b ODA/ODBBoard-99MUSB1LAN2LANL14L13L12IC35BF742 39382221171324891212121945102087712L11 Specified stamping location