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M2540-92000-01 A M2540 Ultrasound System Field Service Manual Page 45
Theory of Operation: I/O Panel
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Connector
Module Types
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 Table 13-2 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