About the IC3600TRLM1A
The IC3600TRLM1A is a Reversing Logic board for the Mark I and Mark II series. These were the original two Speedtronic series for the management of gas and steam heavy-duty turbines. Both systems are now considered obsolete by General Electric.
The IC3600TRLM1A has six integrated circuits, including three marked F939DC and three marked 7349-46. The board has eight transistors of two different designs. The board includes two trim potentiometers. These are located side-by-side along one long edge of the board. Trim potentiometers may be used for the calibration of circuits.
The IC3600TRLM1A has several lines of resistors that parallel the long dimensions of the board. Resistors vary in their resistance values. The board uses ceramic and aluminum electrolytic capacitors, as well as capacitors of other material. Most components are mounted horizontally.
The IC3600TRLM1A has several silver traces running across its surface; many of these traces connect empty through-holes. The majority of the traces are parallel or at a forty-five-degree angle to the board sides. The board is marked with the codes 006/02, 002/02, ADS, and 68A944392. It also carries the round GE “USA” logo and numbering along one edge. This edge includes right-angled metal pins in a parallel line. These pins are designed to transfer data from the PCB out to the rest of the Speedtronic system.
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