Clean the tracks with a lint-free cloth and replace flat-spotted rollers. Dirty light curtain or faulty clutch

There was an incident that the manual could not foresee: a company audit, a rebranding, a new set of service technologies promised by corporate. Sales reps arrived with glossy tablets and the language of upgrades. “Cloud‑enabled predictive maintenance,” they promised, scrolling through slides of dashboards and uptime percentages. The QKS‑14, faithful and analog in its ways, seemed suddenly quaint. The manual, meanwhile, sat unbothered on the cart, its pages unconnected to any cloud.