9.2.6.10
E650 - E653: Primary collimator movement timeout /
E654 - E657: Primary collimator zero position optical always
active /
E658 - E661: Primary collimator motor overrun
These errors are signals of a problem on the primary collimator axes.
Each axis is identified by a label on the collimator and in the following table the
corrispondence between error and axis is reported:
The position of the primary collimator axes is controlled by the optical sensors B7-
B10, that are activated during the axes reset; if these sensors are found active at
the start up phase, and are never sensed de-activated, the errors E654 - E657 are
displayed, meaning that the corresponding sensor is broken or that the motor is
not running.
In case that a sensor is never sensed activated, the errors E650 - E653 are
displayed
In all cases, the optical sensor functionality can be checked placing an opaque thin
material in the optical path and using a multimeter, verify that the voltage
between the following pins: for B7 pin X84-5 and pin X84-3, for B8 pin X84-5 and
pin X84-4, for B9 pin X85-5 and pin X85-3 and for B10 pin X85-5 and pin X85-4 on
the Collimator driver board A12 is about 5V when the optical path is covered by
the thin material and about 0V when the optical path is not covered.
Check the X77-X59 cable.
If there is no variation and an axis does not move or moves with difficulty:
a.
check that the correspondent actuator is not broken;
b.
check the 24V on the A12 board (check led H6 of CCU A11 board) if not
present check the cable X67-X75 and the fuse F1 on CCU A11 board.
c.
check the specific cable among X80-X83 of motor M5-M8; there can be a
short circuit or a broken wire; check also for a loosen contact. In case of
short circuit, replace the cable, verifying also that no damage has been
caused to the motor driver on the A12 board and on the cable X66-X67.
Note
In the event of a short circuit on one of the cable among X80-X83, the CCU
A11 board fuse F1 may be blown (the 24V power supply LED H6 OFF) and/or
the motor driver (on the A12 board) may be damaged: if it is the case,
replace the fuse F1 and then the boards.
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