Level 3 RepairDistribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.Confidential and proprietary-the contents in this service guide subject to change without prior notice.8-118-3-4. Microphone PartCheck 30pin FPCB modulewhere main MIC is placedfor any damage (Tear in FPC,etc)Check component solderingstatuses of C435, C436Change the 30pin FPCB moduleResolder or replace C435, C436ENDNoYesYesYesNoCheck main microphone functionin voice call speaker modeor in Voice Recording modeCheck the voltage atC403 = 2.8V Resolder or replace U400NoYes