Visual Inspection (AOI/manual)

  • Acceptance per IPC‑A‑610 class 1 (consumer products)

  • Check:

    • wetting/fill

    • undersolded / oversolded

    • holes in solderings

    • flux balls

    • bridges

    • tombstoning

    • offset and missmatching

    • cold joints

    • polarities

    • missing/twisted parts

    • presets soldering jumper

  • Additional Check:

    • mechanical damage

    • scratches on surface

    • scratches on matal housings

    • sharp edges from cutting

    • cutting rests

    • finger prints

    • hairs

    • dust

    • flux residues

  • Record in inspection log (Form C1) incl. photos for NCR

  • Segregate NCR units and start MRB process

Chritical shortcut positions

U5 - High Voltage Protection

The spacing between the tips does not comply with soldering guidelines and could potentially lead to short circuits. Therefore, a 100% short-circuit test must be performed by the PCB manufacturer. Any problems that arise must be resolved immediately with the supplier.

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Fig.: U5 passive high voltage protection

Q3 - Hall sensor

The spacing between the pins on Q3 is very tight. If Q3 is manually populated as an option, high-quality soldering is required there. Q3 is not normally populated.

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Fig.: U5 passive high voltage protection

U2 - Micro Controller

U2 must not mismatch the solder pads. All pins must be evenly and centered on the solder pads. The WiFi antenna must not protrude beyond the board.

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Fig.: U5 passive high voltage protection