NSK MEGATORQUE M-ESA-Y3040T25 - Page 281

— A-14 —
2 Remove the compensation ROM (U101) from CB board of old Driver Unit.
(Use a ROM remover.)
Figure A-16
Front side
U2
J3
U102
Figure A-17
U102
CB board
Socket
3 Insert the ROM to new Driver Unit commutation board.
l Be careful of the orientation of the ROM. Make sure the ROM is securely set to the socket.
Caution : When the version of two Driver Units are different, take a special care as the
orientation of IC differs in Version 11 and 21.
Figure A-18
ROM
Be careful not
to break pins.
Socket
Figure A-19
ROM Right position
Wrong
Socket
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