Maintenance

Regular inspection: Installation conditions of the signs, illumination performance, solar cell power generation efficiency, precision inspection by each unit
On-time inspection: Check signs for abnormal operation, degradation or stoppage, and damage

Item	Contents
Conditions of signs	Exterior damage, contamination, variation of installation angle, pillar support
Illumination performance	(nighttime) light emitting part illumination, brightness, chromaticity, uniformity, flickering, optical fiber holder elimination
Solar power generation efficiency	Power generation, installation angle variation, surface contamination, presence of surrounding sunlight shield
Precision check for each unit	Internal wiring insulation and connection state, control box sealed state, battery performance