Loose QC system leads high defective ratio of finished power supply triggering massive overseas return and brand reputation loss, top adapter factory builds multi stage inspection system to control product hidden fault in advance. Summarized from internal production management standard, this article unpack full link QC norms.

Every batch core component including transformer capacitor IC needs parameter test and certification document check before entering warehouse, unqualified raw material gets direct return to supplier without flowing into production line. Flame retardant plastic shell raw material conducts combustion test to verify fire resistant performance matching global safety certification requirement. All incoming test data files archive for long term traceability of finished AC DC adapter quality issue.

After internal circuit soldering, random sampling tests output voltage ripple protection function of semi finished products to fix circuit layout defect before shell assembly. Abnormal semi finished goods separate from normal production flow to avoid mixed assembly into finished certified power supply products. Real time QC record updates every production shift to track daily production quality fluctuation condition.

All finished AC DC adapter and certified power supply undergo continuous long time power on aging test under rated input voltage environment simulating real daily working state, inspect voltage drift over long time running. After aging finished goods complete final appearance plug and electrical full inspection before packing, unqualified products classified scrapping treatment.