Polarity and existence of clear parts

Polarity and existence of electrolytic capacitor

Polarity and existence of diode

Existence and banding of resistors

Existence of parts

Polarity, existence, wrong pin number of IC

Wrong connector color

Polarity, existence, wrong pin number for connectors

LED color and brightness

Existence of parts with the same color on white boards

Existence of jumper leads

Excessive inclination of parts

Brightness and lighting failure in each segment

Screw existence

Polarity and existence of white photo couplers

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Typical Inspections