F Ensure that all required components are mounted.
When replacing a component or PC board, check that all components, including the snubber
capacitor, are correctly mounted. If the snubber capacitor is not mounted, for example, the IPM
will be damaged.
F Tighten all screws firmly.
F Check the specification code of the fuse, PC board, and other
When replacing a fuse or PC board, first check the specification code of the fuse or PC board,
then mount it in the correct position. The machine will not operate normally if a fuse or PC board
having other than the correct specification code is mounted, or if a fuse or PC board is mounted
in the wrong position.
F Mount the correct cover.
The cover on the front of the amplifier carries a label indicating a specification code. When
mounting a previously removed front cover, take care to mount it on the unit from which it was
F Notes on cleaning the heat sink and fan
1) A dirty heat sink or fan results in reduced semiconductor cooling efficiency, which degrades
reliability. Periodic cleaning is necessary.
2) Using compressed air for cleaning scatters the dust. A deposit of conductive dust on the
amplifier or peripheral equipment will result in a failure.
3) To clean the heat sink, do so only after turning the power off and ensuring that the heat sink
has cooled to room temperature. The heat sink becomes extremely hot, such that touching
it during operation or immediately after power–off is likely to cause a burn. Be extremely
careful when touching the heat sink.
F Notes on removing the amplifier
Before removing the amplifier, first ensure that the power is shut off. Be careful not to jam your
fingers between the power magnetics cabinet and amplifier.