Oki B721

45487001TH Rev.1
7-13 /
Oki Data CONFIDENTIAL
7. Connection diagrams
7.3 F/W version number
7.3.1 Maintenance board indication stamp
In accordance with the following list, a specified part number is stamped on the maintenance
board indication field on PU/CU board.
Series No.
Stamp No.
(Maintenance Board
Series No.)
Board 99M(YU)
Series No.
Use for
1 451020 [01] 99M-1 (45075601) B721 ODA
2 451020 [02] 99M-1 (45075601) B721 OEL/AOS
3 451020 [03] 99M-1 (45075601) B731 ODA
4 451020 [04] 99M-1 (45075601) B731 OEL/AOS
5 451020 [05] 99M-1 (45075601) ES7131 OEL/AOS
6 451020 [06] 99M-1 (45075601) MPS 5501b ODA/ODB
Board-99M
USB1
LAN2
LAN
L14
L13
L12
IC35
BF7
42 39
38
22
21
17
1
3
2
4
8
9
12
1
2
1
2
1
9
451020
8
7
7
12
L11
Specified stamping location