Philips Avalon FM20 - LCD Display and Touchscreen; Noninvasive Blood Pressure Assembly; Spo2 Assembly; Input;Output Interface Boards

4 Theory of Operation
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LCD Display and Touchscreen
The LCD Display Assembly consists of a five-wire resistive touchscreen, a 6.5" TFT panel, and an
LED back-light, all connected to the Display Adapter Board (M2703-66440), and fitted into the display
housing.
The board is connected to the Recorder Adapter Board (M2703-66430) via a 50-pin ribbon cable. The
green power LED is incorporated into the Display Adapter Board.
Noninvasive Blood Pressure Assembly
The optional Noninvasive Blood Pressure Assembly (M2703-64602) is located in the front left-hand
corner of the bottom housing assembly. It is connected via a serial link to the Main CPU Board.
SpO2 Assembly
The optional SpO
2
Assembly (M2703-64603) is physically located on the Bus Master Board, but sends
data directly to the Main CPU Board via a serial link.
Input/Output Interface Boards
There are five optional interface boards available:
• LAN/RS232 Interface Board, used for connecting to a PC running the Support Tool and to an
obstetrical surveillance and documentation system such OB TraceVue/IntelliSpace Perinatal.
• MIB/RS232 providing two independently configurable ports for connecting Tympanic
temperature and providing a data export functionality.
• Quadruple USP ports for connecting a keyboard, bar code scanner, or a mouse.
• Flexible Nurse Call interface to connect to a nurse call system.
• PS/2 Interface Board, used for connecting an external keyboard or mouse.
The interface boards plug into the two interface slots on the underside of the device, and are
controlled by the Main CPU Board.