Prerequisite and information
The Electronics repair is no simple task. In order to successfully repair an electronic assembly unknown to us, detailed information is essential. Furthermore, it should be ensured that the fault also lies with this electronic part.
The necessary groundwork for good information
In the first step, a competent person must diagnose the system/device and locate the fault. After the defective assembly has been elicited, the technician can create a fault description for us. This includes marking the defective inputs/outputs. This procedure can increase the probability of repair and reduce costs.
Pin assignment, circuit diagram and wiring diagram
For new assemblies or devices, we will ask you for a circuit diagram and/or pin assignment. These diagrams are necessary for us to understand the connections between the components and the functions of the unit. We do not need the actual circuit diagram of the board, usually these are not officially available anyway.
What is a pin assignment
A pin assignment is the simplest form of a circuit diagram. All the plugs of a module are described on a pin assignment. In addition, there is a pin number for each connector, including a description of its function. The example on the left shows the pin assignment of an engine control unit.
What is a circuit diagram
In electrical engineering, a circuit diagram or schematic is the graphical representation of a device. This representation does not take into account the real arrangement of the components. The circuit diagrams show all the connectors of the individual assemblies and how they are connected to each other. The circuit diagrams are passed on by the builder to the maintenance electricians or to the customer. In the example picture on the right you can see a circuit diagram of an industrial machine. Further information on the Circuit diagram.
Do not confuse with the electronic circuit diagrams!
There are also circuit diagrams in electronics, these are also called circuit diagrams or circuit sketches. The circuit diagrams are a graphic representation of a circuit board, without regard to the real arrangement of the components. These diagrams are kept under lock and key by the manufacturers and are rarely made public. You can find an example of an electronic circuit diagram at Hardware development under point two.