Abstract：ARL4460 spark discharge atomic emission spectrometer from Thermo Fisher (hereinafter referred to as spectrometer) has been widely used in the laboratories of domestic steel plants. It has many advantages such as analysis of multi-elements, wide range, fast speed, convenient operation, low detection limit and high accuracy. The fault phenomena, inspection and handling methods of the spectrometer was introduced for the cases that the chip on the control system circuit board (ICS) was damaged. Moreover, the fault phenomena, inspection and handling methods were also discussed when the 5 V power supply disordered component was damaged on low voltage power supply circuit board. The study provided an idea to repair the circuit board fault of the spectrometer for the laboratory maintenance personnel, which could help them to quickly recover the circuit board fault, thus saving the cost of spare parts.
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