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AOI systems capture high-resolution images of assembled boards using cameras, specialized optics, and controlled lighting.
The captured images are compared to either a known-good reference image or the original design data to detect defects such as missing components, solder bridges, insufficient solder, or misalignment.
In a surface-mount technology assembly line, an AOI system is typically placed after the reflow soldering oven to inspect completed assemblies.
AOI systems are used to inspect printed circuit boards, hybrid circuits, and advanced semiconductor packages for solder joint and component defects.
Common detected defects include solder bridges, insufficient or excessive solder, tombstoning, missing or misaligned components, and polarity errors.
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The following facts about the Yestech FX 940 AOI are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No specifications for the Yestech FX 940 AOI are on record.
Answerable by: an OEM datasheet, a cleanroom equipment inventory, or an engineer who operated or installed it
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the Yestech FX 940 AOI are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the Yestech FX 940 AOI are on record.
Answerable by: an OEM product catalog or an engineer who ordered or specified the tool
The control-system platform and OS era of the Yestech FX 940 AOI are not on record.
Answerable by: an engineer who operated it or OEM installation records
No publicly documented failure modes or field errata for the Yestech FX 940 AOI are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
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Last updated Aug 31, 2026.
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