Philips M2540 I/O Panel , System Control Panel

M2540-92000-01 A M2540 Ultrasound System Field Service Manual Page 45

Theory of Operation: I/O Panel

The four transducer module bays accept the following types of modules in any combination:

•Cannon connector

•Advance Vision connector

•Pencil-type transducer connector

•Blank module

See Table13-2 on page 179 for a list of the modules and their part numbers.

I/O Panel

The I/O panel bears four connectors and two ground points. The main system ground used for

safety testing, and an equipotential post are the two ground points on the panel.

The I/O panel’s connectors are

•An RJ-45 (CAT 5) connector for connection to a LAN

•A BNC connector that carries composite video signals for a legacy printer

•A BNC connector that carries trigger signals for a legacy printer

•A 9-pin D connector for the optional foot switch

System Control Panel

The system control panel contains the circuitry to process control inputs, the system keyboard,

rotary and slide controls, and the trackball. A USB cable carries control inputs from the control

panel to the PC. An auxiliary cable carries power from the system power supply. The system

control panel circuit board also carries the amplifiers for the system’s stereo speakers.

All control inputs and LEDs are controlled by the system’s PC, and their functions are

determined by resident control-panel and system software.

Circuit boards inside the system control panel are not field serviceable or replaceable. The

entire assembly, including circuit boards, bezel assembly, and labels, is available as a replaceable