ā A-17 ā
B
B
3
3
t
t
y
y
p
p
e
e
B
B
5
5
t
t
y
y
p
p
e
e
2
2
3
3
t
t
y
y
p
p
e
e
2
2
5
5
t
t
y
y
p
p
e
e
Appendix 4: How to Replace ESB Driver Unit
3. Remove U102 on the CB board with the ROM remover.
l The B3, 23, B5, and 25 type Driver Units do not require the transfer of the ROM.
Figure A-17: Remove the U102 ROM.
U2
J3
Front side of Drver Unit
U102
Figure A-18: Compensation ROM
U102
CB board
Socket
4. Transfer the removed compensation ROM to the new ESB Driver Unit.
l When transferring the ROM, be careful for the orientation of the IC. Be sure to insert firmly the
ROM in the socket.
Figure A-19: Note 1: For inserting the ROM into the socket.
ROM
Be careful not to
break the pins.
Socket
Figure A-20: Note 2: For inserting the ROM into the socket.
ROM
Right position
Inclined
Socket
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