Gendex ORTHORALIX 9200 Service Manual page 80

F.3.23 kV out of range
The kV feedback from the tubehead is monitored by a comparator
the interrupt line of the microcontroller.
When the value of the kV feedback signal is outside the set operat-
ing range (nominal value ± 3kV), the microcontroller disables the
converter electronics and communicates the alarm to the host
board PC1; in consequence of that, the X-ray emission is stop
by disactivating the START_XRAY line. It waits for a reset before
starting a new exposure sequence.
If the kV generated are really too high (more than 90) also the
alarm may be generated.
The kV feedback signal can be monitored with a multimeter con-
Section D for more details).
Possible cause:
1.
2.
tubehead defective.
3.
tive.
If the converter board PQ1 needs to be replaced,
the service programs Tube calibration and Vf tube
editing must be performed (see the relevant para-
graphs of this section for more information).
The alarm is captured and stored as soon as it as it is detected.
Press the RESET push button on the control panel to cancel the
alarm.
Gendex Dental Systems 4519-190-71193-7
-
F-11
Printed on: 20 Apr 2012, 04:59:40 pm; Printed by: UWE.ZELLER
ORTHORALIX 9200 Service Manual
F.3.24 mA out of range
The mA feedback coming from the tubehead is monitored by a
connected to the interrupt line of the microcontroller.
When the value of the mA feedback signal is outside the set op-
erating range (nominal value ± 5%), the microcontroller disables
the converter electronics and communicates the alarm to the host
board PC1; in consequence of that, the X-ray emission is stop by
disactivating the START_XRAY line. It waits for a reset before start-
ing a new exposure sequence.
The mA feedback signal can be monitored with a multimeter
(see Section D for more details).
Possible causes:
1.
2.
3.
tubehead defective.
4.
tive.
If the converter board PQ1 needs to be replaced,
the service programs Tube calibration and Vf tube
editing must be performed (see the relevant para-
graphs of this section for more information).
The alarm is captured and stored as soon as it is detected.
Press the RESET push button on the control panel to cancel the
alarm.
-
(03.0)E