Some words might not have three good variants. For instance, "various" in "to the device’s various components." Variants could be diverse .
I need to be careful with technical terms like "schematic diagram" as well. Maybe "blueprint|technical plan|circuit map" could work there. Also, words like "troubleshooting" might have variants like "diagnosis|identifying issues|problem-solving." Samsung A12 Schematic Diagram
Continue this for each part. Be cautious with phrases like "DIY enthusiasts" to substitute with R&D Enthusiasts. Some words might not have three good variants