Welch Allyn PROPAQ CS - Manual (Page 109)

7
105
Technical overview
Introduction
This section describes the electronics of the Propaq CS monitor and three of its options:
Printer, Pulse Oximetry (SpO
2
), and Capnography (CO
2
).
This section is intended as an aid to servicing at the field replaceable unit level and
contains only system-level and functional-level circuit descriptions.
When replacing modules or components, refer to “Repair procedures” on page 59. Part
numbers are identified in “Field Replaceable Units (FRUs)” on page 129.
System description
The Propaq CS monitor can be configured as a stand-alone monitor or with one of two
optional housings containing different monitoring and printer options. The figures on the
following pages illustrate the possible housing configurations.
The main functional modules (e.g. Analog Board, Recharger Board, Printer, SCP Board,
etc.) reside in the housings. The figures on the following pages illustrate the location of
the main functional modules in the Propaq CS monitoring system housings.
The monitor electronics reside on three circuit boards within the monitor housing (front
and rear chassis). Additional circuitry for the printer and optional monitoring parameters
reside on additional circuit boards housed in the expansion modules.
The monitor system block diagram is shown on page 110 .
The monitor electronics consist of the power system, monitoring electronics, and the cuff
pneumatics.