Provided technical support and troubleshooting for communication and display systems, including repair and
maintenance of repeaters, switch, and LED display modules.
Performed hardware testing and signal analysis using oscilloscopes, multimeters, and spectrum analyzers.
Conducted circuit-level diagnostics and debugging to identify hardware failures and optimize performance.
Power Supply Module
In fiber optic repeater remote units, the power supply module is one of the most failure-prone components.
Diagnosed faults in DC-DC conversion circuits and input protection stages.
Replaced damaged components such as fuses, resistors, capacitors, and power ICs.
Identified issues including no power output, voltage instability, and intermittent reboot
Performed PCB-level fault tracing and component replacement using soldering tools.
