This is not a quality problem. Every product has certain defects, and it is not perfect. Quality problems refer to the performance problems in the machine, the wrong position of parts,

Virtual welding

、

spot-weld

, parts are damaged,

relationship

Connection problems, mismatch of component parameters, component errors, PCB wiring problems, potential safety problems, shielding problems, grounding problems, software, etc. All these may cause functional defects of electronic products.