9-6
NOTE:
Normally, it is not needed to remove completely the cassette tray from the bucky
in order to load a cassette. Cassettes may be inserted in the tray by pulling the
tray until movement is stopped by the catch on the lower rear of the tray.
NOTE: Even if it is not needed, if it is wanted to remove totally the cassette tray
from the bucky, just pull the tray out until it is stopped by the catch (located on the
upper or lower side of the tray depending if the SG80/120 is left or right tray inser-
tion configured), then press the catch to the bottom of the tray and keep it pressed
while you slide carefully the tray out of the bucky assembly.
4-3 Cassette Removal
Procedure:
1.
Extract the cassette tray pulling by its handle.
2.Pull up the tightening lever and remove it from the cassette, that remains free.
3.Remove the cassette and close the cassette clamp locking assembly.
4-4 AEC Detector Areas
The SG80/120 may operate with an Ion Chamber Detector. For further informa-
tion about operation of the Ion Chamber Detector, see generator service and
operating manuals or automatic exposure control operating manual.
The three field pattern on the front panel of the SG80/120 corresponds to the
three detection areas for the Ion Chamber Detector.
4-5 Alignment
It is important that the X-Ray tube is accurately centered with the Bucky trans-
versely. If the alignment is not accurate, density cut-off at the edges of the film
and appearance of grid patterns may be found. The alignment is not critical when
an anti-diffusion grid is used. In this case, tilted tube techniques may be used
without undue cut-off.
NOTE:
The cassette tray handle is marked to indicate the vertical center of the bucky. To
assure the bucky is vertically aligned with the X-ray beam, move the bucky or the
tube in order the collimator light is aligned with this center mark. For further infor-
mation, see also collimator operating manual.
TO AVOID THE CASSETTE-CLAMP LOCKING ASSEMBLY CAN BE
DAMAGED, ALWAYS CLOSE IT BEFORE INSERTING THE CASSETTE
TRAY INTO THE BUCKY TRAY SLOT
USE CAUTION TO AVOID CASSETTE SENSING ARM DEFORMATION.
ITS SHAPE IS IMPORTANT TO OBTAIN ACCURATE FIELD
PLACEMENT. IF THE ARM IS DAMAGED, IT HAS TO BE REPLACED.
DO NOT TRY TO REPAIR THE ARM IN CASE IT BECOMES
DEFORMED.
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