Gendex ORTHORALIX 9200 Service Manual page 77

ORTHORALIX 9200 Service Manual
F.3.16 +5V conv. alarm
ance ± 10 %).
alarm, temporarily disables the converter electronics and com-
municates the alarm to the host board PC1.
The host provides a diagnostic message on the display and
waits for the alarm to self-reset before starting a new exposure
sequence.
Check the value of the power supply on the test points TP7 and
TP8 (GND) using a digital multimeter (VDC) and by checking the
LED H8 (ON=OK, OFF=NOT OK).
Check whether the common power supply +400VDC is out of
range, on the connector X41 pins 1-2 of the converter board.
Check the reference voltage of the A/D converter (+5V) on TP19
and TP8 (GND): adjust if necessary by acting on potentiometer
P1 (is mandatory to use an high resolution, 4digits multime-
ter).
Possible causes:
1.
check whether fuse F3 has blown
2.
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 pushbutton on the control panel to cancel the
alarm (if expired).
F.3.17 +15V conv. alarm
(tolerance ± 10 %).
the alarm, temporarily disables the converter electronics and
communicates the alarm to the host board PC1.
The host provides a diagnostic message on the display and
waits for the alarm to self-reset before starting a new exposure
sequence.
Check the power supply value on test points TP3 and TP8 (GND)
using a digital multimeter (VDC) and by checking the LED H6
(ON=OK, OFF=NOT OK).
Check whether the common power supply +400VDC is out of
range, on the connector X41 pins 1-2 of the converter board.
Gendex Dental Systems 4519-190-71193-7
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F-8
Printed on: 20 Apr 2012, 04:59:40 pm; Printed by: UWE.ZELLER
Check the reference voltage of the A/D converter (+5V) on TP19
and TP8 (GND): adjust if necessary by acting on potentiometer
P1 (is mandatory to use an high resolution, 4digits multime-
ter).
Possible causes:
1.
check whether fuse F3 has blown
2.
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 pushbutton on the control panel to cancel the
alarm (if expired).
F.3.18 +31V conv. alarm
(tolerance ± 1,5 %).
alarm, temporarily disables the converter electronics and com-
municates the alarm to the host board PC1.
The host provides a diagnostic message on the display and
waits for the alarms to self-reset before starting a new exposure
sequence.
Check the power supply value on test points TP5 and TP8 (GND)
using a digital multimeter (VDC) and by checking the LED H5
(ON=OK, OFF=NOT OK).
Check whether the common power supply +400VDC is out of
range, on the connector X41 pins 1-2 of the converter board.
Check the reference voltage of the A/D converter (+5V) on TP19
and TP8 (GND): adjust if necessary by acting on potentiometer
P1 (is mandatory to use an high resolution, 4digits multime-
ter).
Possible causes:
1.
check whether fuse F2 has blown
2.
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 pushbutton on the control panel to cancel the
alarm (if expired).
(03.0)E