Planmeca Proline EC pan Technical Manual page 201

ELECTRICAL PARTS AND THEIR FUNCTIONS
Generator processor (105-10-28)
Cassette limits (105-10-04)
Keyboard processor (105-10-27)
Layer/hold limits (105-10-07)
Display/keyboard (105-10-30)
Technical Manual
This circuit board is located beside the generator in the horizontal section of the rotating part.
This is the circuit board that is nearer to the cassette end of the rotating part. Its function is to
control the generator and to operate three stepper motors, the rotating part rotation motor, the
film cassette transportation motor and the tubehead primary aperture motor. It also operates
the tubehead cooling fan and the cephalostatic solenoids when applicable.
When this circuit board is replaced, the new one must be adapted to the system. This circuit
board contains information about the primary aperture positions as well as the X-ray tube type
and filament characteristics. Therefore the primary apertures must be aligned and the tube
type must be programmed, after which the system must be allowed to learn the filament
parameters.
This circuit board is located in the cassette end of the rotating part. It's function is to detect the
end limits of the cassette motor movements and pass the information to the generator proces-
sor through a 20-pole flat cable.
When replaced, the four Hall-detector magnet adjustments are to be checked.
This circuit board is located in the lower fixed part. It is the master microprocessor that con-
trols everything in the equipment. It operates three motors, the up/down motor, the layer
adjust motor and the patient temple rest motor. It also controls the operation of the generator
processor and gives the operation commands to it via one serial communications cable. It
operates the two relays on the low voltage power supply that give power to the generator and
to the lamps. The keyboard and display are also controlled by this processor.
When this circuit board is replaced, the new one must be adapted to the system. This circuit
board contains information about the warning signal pitch, up/down motor speed settings,
layer adjust motor location and zero point, operational parameters (kV, mA, sectors, layer
forms etc.), the exposure counters and the time. Also the error history and previous technical
factors memories go along with this circuit board. There are two things that MUST be done
before use when this board is replaced:
In the service mode pass twice the layer motor reference sensor to find the place.
Tell the system whether it is a panoramic or a cephalostatic one.
This circuit board is located at the layer adjust mechanism in the lower fixed part. Its function
is to detect the layer adjust motor and the temple rest motor limits and pass the information to
the keyboard processor via a 6-pole cable.
When replaced the layer adjust and temple rest motor operations should be checked.
This circuit board is located in the keyboard housing below the lower fixed part. It's function is
rather obvious, to drive the displays according to the information it receives from the keyboard
processor and to pass the information of the keyboard states to the keyboard processor via a
6-pole cable.
This circuit board can be replaced without any further actions.
Chapter I - FUNCTIONAL DESCRIPTION
Planmeca Proline EC X-ray unit I-13