Gendex ORTHORALIX 9200 Service Manual page 99

ORTHORALIX 9200 Service Manual
F.4.3.25 Tube calibration
With this service program you can perform the tube calibration
by making three exposures with 70 kV, lasting 500 ms and with
4, 9 and 14 mA.
Before proceeding with tube calibration, be sure that the
filament of the X-ray tube is at the right temperature: so,
execute at least three panoramic exposures (74kV, 10 mA)
respecting the duty cycle, before entering the Tube calibra-
tion service program.
The following message will appear on the display:
TUBE CALIBRATION
Press DUMMY RUN to go
1.
Press the DUMMY RUN key on the keyboard
2.
the following will appear on the display:
70 kV 4 mA 0.5 s
3.
make an exposure, then the following will appear:
70 kV 9 mA 0.5 s
4.
make an exposure, then the following will appear:
70 kV 14 mA 0.5 s
5.
at the end of the third exposure, the Vf Tube Editing pro-
gram is automatically entered, showing the tube calibration
parameters obtained at the end of the tube calibration; take
note that these parameters are already stored, and the old
ones are lost
6.
record the values in the System Configuration Module (See
Section C)
7.
press the DUMMY RUN key on the keyboard to leave the Vf
Tube Editing service program.
For more information concerning the tube calibration, refer to
the paragraph Adjusting tube current of this section of the
Service Manual.
F.4.3.26 Console test.
With this service program you can start a test of the keyboard
and of the display.
The following message will appear on the display:
CONSOLE TESTS
Press DUMMY RUN to go.
After pressing the DUMMY RUN key on the keyboard, the follow-
ing message will appear on the display:
CONSOLE TESTS
keys to press 20
Gendex Dental Systems 4519-190-71193-7
F-30
Printed on: 20 Apr 2012, 04:59:40 pm; Printed by: UWE.ZELLER
The first part of the test is a check on every key of the keyboard:
when a key is pressed, the relevant LED indicator (if present)
turns on and decrements the counter of the key, which must be
pressed again.
The counter starts from 20, because there are 20 keys on the key-
key is pressed more than once, the counter does not decrement).
Every time a key is pressed an audible message ("beep") is gen-
erated.
When all the keys have been pressed, an automatic display test
starts, showing all the ASCII characters (letters, numbers and
special symbols).
At the end, it automatically enters the selection of the service
programs and turns off all the LEDs on the keyboard.
F.4.3.27 Retry readout
In case of detection of a protocol error in the communication among
the electronics board, several alarms are generated; they are:
when the host computer board PC1 has
detected a communication error with
detected a communication error with
the host computer board PC1
when the host computer board PC1 has
detected a communication error with
the operator conso le control board
PC7
No communication when the operator console control
board PC7 has detected a communi-
cation error with the host computer
board PC1
when the host computer board PC1 has
detected a communication error with
the PA5 AEC control board.
PH3 Ceph alarm when the host computer board PC1 has
detected a communication error with
the PH3 Ceph DMU interface board.
PH3 Pan alarm when the host computer board PC1 has
detected a communication error with
the PH3 Pan DMU interface board.
PH3 Bridge alarm when the host computer board PC1 has
detected a communication error with
the PA7 auxiliary board.
These alarms are generated if after three attempts (retry) of com-
munication, the proper communication protocol is not restored.
PA5, PA7, PH3 PAN and PH3 CEPH) that are counting the communica-
tion faults occurred: with the Retry readout service program it is
possible to check the contents of these software counters.
The following message will appear on the display:
RETRY READOUT
DUMMY RUN TO GO
(06.0)E