Mindray DC-25, Руководство по обслуживанию

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4-14 Hardware Principle
4.6 Ultrasound System Monitoring
CPU
module
Multifunction
FPGA
System
monitor
circuit
LPC
SMBUS
Temperature
sensor
Main unit
front-end BF
FPGA
temperature
-12V
-5V
5VSTB
2V5
1V8V
1V5
1V2
RTC
voltage
Main board back-end
CPU
module
temperature
Main unit
fan
Machine
fan
Power supply
module
Figure 4-14 Principle Diagram of Ultrasound System Monitoring
Ultrasound system monitoring is mainly to monitor every voltage of interior machine,
Temperature Monitoring
Function:

On the back-end of the main board, a special monitor IC is used to monitor
signal voltages and clock battery power that are provided to the main board by
the main unit box power board.

The system temperature is detected in three positions: BF FPGA, CPU module
and power module.

Monitoring chips control the main unit fan and the machine fan, and then read
the fan rotating, which send to multifunction FPGA by smbus and to CPU
module by LPC bus.