HEIDENHAIN iTNC 530 Service Manual page 259

Position of the fuses in the UV 105 B:
A defective UV 105 (B) must be replaced.
Corrective action
Mounting the
UV 105 (B)
July 2010
Note
If any of the fuses is defective, the UV 105 (B) power supply unit must be replaced.
Replacing the fuses is not advised.
DANGER
For mounting the UV 105 (B), the additional 5V lines must be connected with the correct
polarity!
Otherwise there will be a short circuit of these lines on the 5V ribbon wires.
Restore the ground by means of lines and conductor bars!
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