KaVo In eXam 3510, Инструкции техника

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Technician's instructions KaVo In eXam 3510
1 Product description
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1.2 Functioning of In eXam electronics
1.2 Functioning of In eXam electronics
1.2.1 Basic mode (idling)
▪ Turn on the mains voltage
▪ The mains voltage is applied via F2 (main fuse) and F4 (control circuit fuse) to
the transformer T1, is transformed to 36 VDC, rectified and filtered.
▪ From the 36 VDC, +12 VDC and +5 VDC voltage are generated that are isolated
from the high voltage side. LD 2 and LD 3 shine for the control.
▪ The control unit is supplied with voltage
▪ The control unit runs a self test (buzzer, LEDs and LCD display)
▪ Depending on the setting of the control unit, the HF main board shows the fol‐
lowing:
– at 7mA default > LD 5 shines
– at 70kV default > LD 7 shines
1.2.2 Switch between 4/7mA
▪ Select via the control unit, e.g. 7mA
▪ The relay in the x-ray head is de-energised and thereby bridges one of the re‐
sistors that are series-connected to the cathode >> R > I .
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