What does "TP" mean in a schematic diagram?

In a schematic diagram, "TP" stands for Test Point. Test Points are specific locations on a circuit where measurements can be made to facilitate troubleshooting and diagnostics. These points allow engineers and technicians to easily access and monitor the electrical signals within the circuit without interrupting its operation.

Using test points is crucial for ensuring accurate testing and analysis, especially when checking for voltage, current, or signal integrity. They are typically marked clearly on the schematic to guide users to the appropriate locations for testing.

The other terms, while they may refer to components or locations in a circuit, do not specifically denote the purpose of facilitating measurements in the way that Test Point does.