Planmeca Proline CC, Technical Manual

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Chapter G - TROUBLESHOOTING
G-6 Planmeca Proline CC panoramic x-ray
Technical Manual
f) Power off and wait for 1 minute to allow the capacitors to discharge. Connect connector P1. If the
fuses hold when powered on take step 8.
If not, there is a short circuit in the cable harness from this board to the generator processor or in
the generator processor and the circuitry connected to it. Open the bottom cover of the rotating
part and detach the generator processor board connector P5. If a fuse blows, replace the cable
harness. If not, power off and connect P5 to the generator processor board and detach all the
other connectors from it. Check the fuse on the board and replace if necessary. If a fuse blows
when powered on, replace the generator processor board (see chapter Circuit boards/generator
processor). If not, power off and connect the connectors back to the generator processor board
one at a time checking every time for the fault to reappear. Check the cable that caused the fault
and all the circuitry connected to it. Replace the defective parts.(see appropriate chapters for
adjustments that should be made).
g) Power off and connect connector P4 to the low voltage power supply board. Open the lower fixed
part cover and detach connector P1 from the keyboard processor board. If the fuses hold when
powered on take step 9.
If not, there is a short circuit in the cable harness from the low voltage power supply board to the
keyboard processor board. Replace the cable harness.
h) Power off and connect P1 to the keyboard processor board and detach all the other connectors
from it. Check the fuse on the board and replace if necessary. If a fuse blows when powered on,
replace the keyboard processor board (see chapter Circuit boards/keyboard processor). If not,
power off and connect the connectors back to the keyboard processor board one at a time (leave
the connector P7 out) checking every time for the fault to reappear. Check the cable that caused
the fault and all the circuitry connected to it. Replace the defective parts.(see appropriate
chapters for adjustments that should be made). If the fuses didn’t blow take step 10.
i) Power off and connect P7 to the keyboard processor board. Open the keyboard housing and
detach connector P2 from the keyboard/display board. If the fuses hold when powered on take
step 11. If not, there is a short circuit in the cable harness from the keyboard processor board to
the keyboard/display board. Replace the cable harness.
j) Power off and connect P2 to the keyboard/display board and detach connector P1. Check the
fuse on the board and replace if necessary. If a fuse blows when powered on, replace the
keyboard/display board. If not, the system should now start normally and you can take the step
12. If the display is still blank, look at the keyboard processor board for a red LED. If it is off or
blinking, replace the board. If it is continuously illuminating, replace the keyboard/display board.
If neither did help, power off and detach connector P1 from the low voltage power supply board.
If the system now starts, the fault should be located on the generator processor board. Replace
(see chapter Circuit boards/generator processor).
k) Power off and connect connector P1 to the keyboard/display board. Turn the rotating part
manually to the starting point (on the sensor) if it was not there. Shift the cassette on the sensor
at the patient positioning end (backwards when looking from the keyboard). connect the low
voltage power supply connector P5. Power on. Push mm or -mm button to switch on the
positioning lights. If a fuse blows, check the lamps and their wirings. If not take step 13.
l) Using the keyboard drive one motor at a time. (HOLD, LAYER, CASSETTE, PRIMARY
APERTURE). If a fuse blows, check the last motor operated and its wirings. Replace if
necessary. The rotation motor cannot be driven separately and it must be checked last. Push
READY and wait till cassette stops. Keeping the power on move manually the rotating part off
from it’s start sensor, after which the system automatically tries to return the rotating arm onto the
sensor, driving the rotation motor only. Check. If everything is normal take step 14.
m) Enter the service mode. Select for 60 kV and 2 mA and try one exposure. If still OK, select for
maximum values and try one exposure. If still OK enter normal mode and try one normal
exposure with maximum values. If still OK the problem actually was a bad fuse that had blown for
no reason or a bad connection on one end of the connectors. Check. If a fuse was blown during
the exposures the tube power generator takes too much current for some reason and must be
replaced. In this case fuses should not blow but an error indication should appear. Check the
ratings of the fuses.