Gendex ORTHORALIX 9200 Service Manual page 76

F.3.13 Secondary slider
Two optoswitches (S31 and S32) are mounted on the panoramic
cassette carriage to detect the position of the secondary slit,
panoramic or transcan, as listed in the table below:
S31 S32 CONDITION
Secondary slit pan
ON OFF
position
Secondary slit tscan
OFF ON
position
ON ON Error condition
Transition from pan
OFF OFF
to tscan or vice versa
OFF ON Error condition
ON OFF Error condition
The alarm appears on the display when one of the following
conditions is detected:
1.
S31 or S32 damaged
2.
wiring between S31 and AEC control board PA5 (X81) dam-
aged
3.
wiring between S32 and AEC control board PA5 (X82) dam-
aged
4.
PA5 board damaged
5.
(X50) damaged
6.
The PA5 board controlling the two optoswitches is the one
mounted in the panoramic cassette assembly.
If one or both optoswitches are damaged, it is possible to
disable the PA5 board, so that the alarm disappears: the AEC
function is disabled, but the system can be used selecting
manually the exposure parameters; see the explanation of
the Pan PA5 menu service programs for more details.
To reset the alarm it is necessary to switch OFF and then ON the
system.
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).
F.3.14 VLM conv. alarm
of range (tolerance ± 10 %).
alarm, temporarily disables the converter electronics and com-
municates the alarm to the host board PC1.
Gendex Dental Systems 4519-190-71193-7
MESSAGE
None
None
Secondary slider
Secondary slider
Secondary slider
Secondary slider
F-7
Printed on: 20 Apr 2012, 04:59:40 pm; Printed by: UWE.ZELLER
ORTHORALIX 9200 Service Manual
The host provides a diagnostic message on the display and
waits for the alarm to self-reset before starting a new exposure
sequence.
Possible causes:
1.
2.
PFC board PN1 defective
3.
mains supply out of range.
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.3.15 -15V 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 power supply value on test points TP10 and TP8 (GND)
using a digital multimeter (VDC) and by checking the LED H7
(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 F4 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).
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(03.0)E