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==Wavy trace == | ==Wavy trace == | ||
:'''Symptom:''' Wavy trace | :'''Symptom:''' Wavy trace | ||
:'''Root cause:''' C786 ( | :'''Root cause:''' C786 (100 µF 25 V) has high internal resistance (ESR ~ 20 Ω) causing +12.6 V regulator circuit to oscillate | ||
:'''Solution:''' | :'''Solution:''' Replace C786 with new part. | ||
:<gallery> | :<gallery> |