... Beads, Optical couplers, Relay, Fuse,Diodes, Discharge, Quartz crystal Devices, Speaker, Buzzer, Optoelectronics/Fiber, Laser, Transistor,Trimmer potentiometers ... , FET(module), inductors, Fixed resistors, Swith, Crystal, Potentiometers and so on,which are widely used in ... quality problem, and require the RMA, a test report from authoritative third party (IST, Rotronix, WhiteHorse) ...