Uv 106, Uv 106 B - HEIDENHAIN iTNC 530 Service Manual

14.1.3 UV 106, UV 106 B

Possible
causes of error
Service diagnosis
UV 106 (B)
When checking the UV 106 (B) power supply unit, proceed as follows:
Control of the LED The LED READY UV on the front panelof the UV 106 (B) indicates the readiness of the unit.
READY UV
Function of 
the fan
If it does not, this might indicate that ...
However, this may also indicate that the fan is defective.

Control of the
supply voltages
14 – 214
Supply voltage to U and V missing
Fan failed
Fuse on board of the UV 106 (B) released
UV 106 (B) defective
DANGER
Danger of electrical shock!
High voltages and currents
Check, whether the fan of the UV 105 (B) is running.
No supply voltage for the UV 105 (B) is available.
Fuses in the UV 105 (B) have released.
The UV 105 (B) is defective.
Measure, whether 400 V ±10 % are available on U and V of connector X31 on the front panel.
Note
It is not useful to measure the low voltages on the 50-line ribbon cable of the UV 106 (B)
(e.g., with the HEIDENHAIN test adapter).
The MC could not be connected and the UV 106 (B) would operate without current
consuming unit.
HEIDENHAIN Service Manual iTNC 530