HEIDENHAIN iTNC 530 Service Manual page 261

Fuses in
UV 106 (B)
Position of the fuses in the UV 106:
A defective UV 106 (B) must be replaced.
Corrective action
Mounting the
UV 106 (B)
July 2010
Shut down the control and switch off the machine.
Take precautions against restart.
Check whether there is zero potential on the connections.
Dismantle the UV 106 (B) power supply unit.
Ensure that the unit is not under power.
Remove the side plate.
Check the fuses on the power supply board.
DANGER
Danger of electrical shock!
A switching power supply is located in the UV 106 (B). This switching power supply may
still be under voltage although it is seperated from the power source (without current
consuming unit, the voltage on the board is only reduced slowly).
Do not touch the board or the fuses with bare hands!
Use insulated pincers when removing the fuses!
Caution
Be careful not to touch any components on the power supply board sensitive to electrostatic
discharge and observe the ESD regulations!
Note
If any of the fuses is defective, the UV 106 (B) power supply unit must be replaced.
Replacing the fuses is not advised.
DANGER
Restore the ground!
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