This paper provides a thorough, long-form guide covering the installation, commissioning, routine service, preventative maintenance, troubleshooting, and safety practices for DRGEM digital radiography X‑ray systems. It is intended for biomedical engineers, clinical engineering teams, service technicians, and hospital facilities managers responsible for deploying and maintaining DRGEM flat‑panel digital X‑ray units. Contents include pre‑installation planning, site requirements, unpacking and inspection, mechanical and electrical installation, software setup and network integration, image receptor calibration, QA procedures, daily/weekly/monthly maintenance checklists, parts replacement procedures, fault diagnosis flowcharts, radiation safety considerations, recordkeeping, and a sample service log and parts list.