— A-11 —
Appendix 4 : How to Replace ESA25 Driver Unit
Danger : Make sure the power is turned off when replacing ESA25 Driver Unit.
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In the reference number of ESA25 Driver Unit, second digit from the last denotes whether it is
interchangeable or not.
Figure A-13
M-ESA-Y3040T 2 5
1 : Not interchangeable
2 : Interchangeable (Standard)
F : Special
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For interchangeable (standard) Driver Unit, replace with the Driver Unit which has the same
reference number. Set the same parameters to new Driver Unit.
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When replacing Driver Unit which is not interchangeable, the compensation ROM of the old Driver
Unit must be transferred to the new Driver Unit. When transferring the ROM, the Driver Unit must
be disassembled. To disassemble Driver Unit, follow the procedures described hereafter.
◊
For a special Driver Unit, contact your local NSK representative.
◊
Before replacing the Driver Unit, record all parameters and channel programs. The
record list is provided in the last page of this manual.
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Especially, following items shall be recorded.
• PA, VG, VI, PG, CO, MA, MV, and HO
• Programs and other settings in channels.
◊
When replacing Driver Unit, following tools and Handy Terminal FHT11 are necessary.
1) A screwdriver (cross recessed, 4mm)
2) A ROM remover
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