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Service handbook CP300
5 Physical and Functional
Overview
5.1
Physical Overview
The CP300 unit is enclosed in a two part, medical standard, molded plastic case.
The top part contains the keyboard and the LCD screen with the base section
containing all the electronics of the unit, the RS-232 interface, the thermal printer, the
paper tray, the battery and mains transformer.
The electronics of the unit are contained on a single double sided printed circuit board,
the main board (MK 17-1). This board is secured on spacers molded in the base
section.
The battery is secured in position in a molded recess accessed from the bottom of the
units, and the mains transformer is secured on spacers above the printed circuit
board.
The thermal printer is mounted on spacers molded to the base and the paper tray
motor mounted in a similar way.
Exploded views of the unit are given in the Construction Drawings section at the end
of this book
(see page
5.2
Functional Overview
The CP300 has a PC architecture, including standard expansions like a network
connection and USB ports, etc. The electronics of the CP300 including the power
supply, is contained on a single Main Board (MK 17-1), which contains a ' piggy back'
PC single board controller. The electronics of the CP300 are EMC shielded.
The ECG board provides isolated patient connection and initial processing of the ECG
signals.
The operating system in the CP300 is Windows® NT or XP. The user interface, all
settings, graphical presentations etc. are based on Windows®. The evaluation of the
ECG data, control of the printer and other functions are realised on the Welch Allyn
ECG processor card with its own 68331 microprocessor system. The systems
communicate with each other via dual port RAMs.
Interconnection and EMC drawings are given in the Construction Drawings section at
the end of this book
Physical and Functional Overview
75).
(see page
78).
Physical Overview
5.1
Page 23
5
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