5 - 8 HS70A Service Manual
user environment to each Board. it performs TX Focusing and RX Focusing based on such
information. When high voltage Pulser is sent to the probe according to TX Focusing,
ultrasonic waves are generated; echo signals returning from the body go through an
amplification circuit to undergo Digital Beamforming processing. The RF signal obtained here
goes through various filtering and processing to generate image signals such as BW, Color
Doppler, PW Doppler, CW Doppler, Power Doppler, etc., which are sent to the PC Module to
be implemented on the monitor.
The DC to DC Power Module supplies power to the Ultrasound System Part.
The Ultrasound System Part consists of the following:
• PSA(Probe Select Assembly) Board
• AC(Analog Control)
• BF(Beamformer) Board
• BE(Back End Board)
• DDM (DC to DC Power Module)
• CW(Continuous Wave Board)
PC Part
It main function consists of the Scan Converter and image output circuits for displaying the
ultrasound information generated by the Ultrasound System Part on the monitor. It also
performs control panel and interface functions.
The ultrasound image information from the Ultrasound System Part is connected to PC Part at
PCIF with DMA method, and the ultrasound image is displayed through software DSC and
VGA.
Previous type of the ultrasound image scanner uses the Hardware DSC method, but HS70A
uses the Software DSC and the ultrasound images are displayed on a LCD monitor.
PC Power Supply uses Micro ATX as standard, and it supplies power to PC Part.
The PC Part consists of the following:
• PCIE(Peripheral Component Interconnect Express)
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