44 Service manual
3. Circuit Boards - L1800, Generator Board CRANEX
®
Novus e
L1800 - Description
The Generator board receives kV and mA reference
signals from L1200 as PWM modulated signal. Based
on the kV-reference value, the Generator board gener-
ates the corresponding high voltage between the cath-
ode and anode of the x-ray tube. Based on milliampere
reference value, the generator board generates pre-
heat current (to warm up the fi lament before x-rays are
switched on) and fi lament current (during exposure).
The Generator board receives kV and mA feedback
signals from the tubehead that are used to monitor and
adjust the generated values. The Generator board pro-
duces its own supply voltages.
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