Planmeca Proline CC, Technical Manual

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Chapter I - FUNCTIONAL DESCRIPTION
Planmeca Proline CC panoramic x-ray I-13
Technical Manual
Focal trough positioning light
This lamp is located under the lower fixed part cover. It is reflecting a narrow light beam vertically
to the face of the patient in order to indicate the horizontal layer where the imaging is at the
sharpest. The power to this lamp comes from the low voltage power supply through the keyboard
processor. The lamp is fused with a 2.5 A slow blow fuse at the low voltage power supply board.
This is the most critical of all the lamps, because without this lamp there is no indication of the
actual sharp layer place.
Midsagittal positioning light
This lamp is located in the upper fixed part. It is reflecting a narrow light beam vertically along the
center line of the patient’s face to help the centering of the patient. The power to this lamp is
coming from the low voltage power supply circuit board, where is a 2.5 A slow blow fuse provided
individually for this lamp.
Frankfurt positioning light
This lamp can be found in the cassette end of the rotating part. It reflects a narrow horizontal light
beam on the left cheek of the patient. It’s vertical position can be altered by hand to correspond
the patient’s characteristics. The purpose of this light is to help to position the patient’s head to
be horizontal. The power to this lamp comes from the low voltage power supply circuit board,
where there is a 2.5 A slow blow fuse for it.
2.5 Wiring
The whole electronics of the equipment is constructed in order to keep the amount of wires at
minimum and especially minimize the wires at such points where they are subject to wear due to
movement etc.
The equipment wiring diagram (105-02-01-1/1-B) illustrates the whole wiring concept. It can be
seen that through the most critical rotating joint goes only seven wires that carry all the power
and information that is needed. The accurate information about each wire or cable harness can
be found from this wiring diagram or from the separate cable harness drawings that the reference
numbers on the diagram point to.
In the following few aspects are covered to give an overall view to the wiring concept.
Mains cables
The mains cables are tried to keep separate from all the other wires as good as possible. In the
220 V and 240 V equipments, where the currents are smaller the mains comes in along a spiral
cable on the right side of the column (front view). It ends up to the mains fuses and mains switch
that are located on the lower fixed part on the other side of the metal wall than the keyboard proc-
essor.
In 100 V and 110V equipments the thicker mains cable comes straight to this lower fixed part and
fuses.
From the mains switch the mains cable goes up to the upper fixed part and a mains filter. After
the filter it goes to the low voltage power supply that generates the operating voltages to the elec-
tronics.
Through a relay on the low voltage power supply the mains continues through the rotating joint to
the tube power generator circuit board that is in the rotating arm. Note that the relay only discon-
nects one of the mains wires and therefore even when the power is not connected to the genera-
tor by this relay the electrical shock hazard remains, depending on the polarity of the mains plug.
Always use the mains switch to disconnect both wires.
The mains filter in the upper fixed part takes care that no disturbances generated by the genera-
tor are allowed to the mains. Still there is a small filter on the generator circuit board, the purpose
of which is to cut off the very high frequency components that might be coupled to the low voltage
wires that are squeezed near to the mains wires when going through the rotating joint.
From the main switch on the mains cables are thick enough to be used also in the 100 V equip-
ments.