KaVo ORTHOPANTOMOGRAPH OP 3D Pro, Service Manual, Page: 78 / 192

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3.5.20 EG400 Panel power supply
DESCRIPTION:
Generates the low voltages for the PAN/CEPH and 3D sen-
sors.The board regulates the voltages, 8V analog to 6V or
5V analog and 8V digital to 6V or 5V digital, depending on
what mode is used. There are also power enables in the cir-
cuit. One is external and one is internal. The external P/E is
connected to the digital regulation circuit and internal P/E is
connected from the digital output to the analog enable. The
PAN selecting signal controls the output voltage. On PAN/
CEPH mode (default) the output voltages are 6V. When this
signal is activated, the EG400 is in 3D mode and output
voltages are 5V. The switching circuitry requires an external
+24V for power.
LOCATION:
In the sensor head.
INPUTS:
+8Vdc (digital side)
+8Vdc (analog side)
+24Vdc (power for mode switching)
Panel power enable from the EG200 XRAY IF
PAN/3D select signal from the EG200 XRAY IF
OUTPUTS:
+6Vdc (digital side) PAN mode
+5Vdc (digital side) 3D mode
+6Vdc (analog side) PAN mode
+5Vdc (analog side) 3D mode
FUSES:
None
INDICATOR LEDS:
D3 digital
D4 analog
TEST PINS:
D4 analog