Philips CARDIOMD, Service Manual

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CardioMD AC Option
1MAN0158-H11 04-2005 CSIP Level 1
CardioMD Service Manual
„
12-13
Line Source Compartment Drive
On the inside of the bottom of the AC option bracket four slide bearings are mounted. These run
on two rails mounted on the bottom plate of the line source compartment (see Figure 12.9), thus
allowing the line source compartment to be translated in and out.
Figure 12.11 AC option bracket, inside
The AC option bracket motor is a 24 V DC motor used to translate the line source compartment in
and out. The torque from the motor is transferred via the gear assembly to the gear wheel which
engages a toothbar in the line source compartment.
12.3.3.2 AC Option Bracket Electronics
The AC bracket enclosure contains a printed circuit board carrying:
•
The box motion controller, i.e. the device controlling the movement of the line source
compartment
•
Two DC-DC power converters providing the necessary supply voltages for the AC Option.
Box Motion Controller
Function
The box motion controller is based on a small flash-programmable micro-processor and a motor
driver. The capabilities of the motion controller are as follows:
1. Move line source compartment fully IN (park position)
2. Move line source compartment fully OUT (scan position)
3. Move line source compartment to mid position.
Both end positions and the mid position are sensed by micro switches (see Figure 12.11). When
the line source is in the desired position, the motor is stopped.
Interface cable to
CardioMD detector
24 V DC drive motor
Gear drive assembly
Position switch,
MID position
Interface cable to line
source compartment
Gear wheel engaging
toothbar on line source
compartment
Printed circuit board
Position switches,
fully IN and fully OUT