DS3800NPSR1A1A | General Electric Power Supply Board Mark IV

The DS3800NPSR1A1A is a printed circuit board (PCB) designed for use within the Speedtronic Mark IV system, developed by General Electric (GE). This PCB is an integral component of the Mark IV series, which has been employed in turbine control and automation systems for several decades. 

The DS3800NPSR1A1A PCB features two prominent black semiconductors, each shaped like a square. Both semiconductors are labeled with the part number F28S05/1000Z in white text. Positioned directly above these semiconductors are two medium-sized blue capacitors, designated C2 and C12. Beneath the semiconductors are two small yellow capacitors, labeled C3 and C13. Additional larger yellow capacitors are located below these smaller capacitors. The bottom edge of the PCB contains a long black connector port, with labeling indicating increments from 10 to 80. Above the blue capacitors, there are two small yellow capacitors, identified as C4 and C14. 

In the upper region of the PCB, two integrated circuits are present, adjacent to two half-circle-shaped transistors, each marked with the letter Q. The board is also equipped with a single light-emitting diode (LED), which emits an orange light when active. This LED is situated near the top of the PCB. Additionally, four test points are arranged along the top edge of the DS3800NPSR1A1A, positioned near the LED.