Ultrasound Technologies Fetatrack 310, Service Manual

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Ultrasound Technologies Service Engineer Guide
Document contains information of signals at key points throughout the specified product.
• Fetatrack 310
The following images are oscilloscope snap shots of signals acquired from the Fetatrack 310 main PCB and
correspond to the ‘Fetatrack 310 Ultrasound 1 Circuit’ diagram. This document also applies to the two Ul-
trasound circuits. The service engineer should allow for signal differences on the transmit side of the circuit
as US1 & US2 transmit signals of different frequencies and amplitude.
Note: images of digital signals that are directly linked to the microprocessor can be found on the oscillo-
scope image document related to the ‘Fetatrack 310 digital central processor’ diagram.
Transmitter circuit
U16 pin 3
+ 15V supply rail Transmitter circuit
U16 pin 1
+ 10V ( Vrf1 ) Supply rail
Transmitter circuit
Q4 Drain ( pin 1 ) Transmitter circuit
Q4 Source ( pin 2 )