| 摘要 |
The invention relates to a headlight comprising a plurality of light-emitting diodes as light sources. The aim of the invention is to rapidly detect and identify a defective diode between light-emitting diodes connected in series in line sections. Said aim is achieved by tapping test signals at taps, by checking said signals in an analysis device for deviations from target values, or by simply visually identifying a defective diode. In order to reduce the effort for wiring the test signals, several test signal lines leading away from individual taps are advantageously guided to buses via rectifier diodes as feedback preventers and are fed to the analysis device via said buses. During a test cycle, only one line section out of all the line sections having test signals leading to a common bus is activated respectively for obtaining the test signals associated with said line section, and the activation is successively advanced across all line sections. |
