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SIGMA-LKM3013P Wireless Doorbell (Plug-in)
Brand: Generic / OEM
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Audited BOM: 12 Components
RMA Chain & Defect Intelligence
Root cause causal graph linking factory engineering flaws to verified consumer return reasons.
⚡ Causal Link: Defect to Consumer Return
The instability of the RF receiver module (ENG-001) causes signal reception failures, leading to RMA-001 and complaints of insufficient range (REV-001, REV-005).
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