Samsung SGH-Z370 Service Manual

Also see for SGH-Z370: User guide

SAMSUNG Proprietary-Contents may change without noticeFlow Chart of Troubleshooting and Circuit Diagrams3-13This Document can not be used without Samsung's authorization3-1-5. Microphone PartMicrophone does not workCheck the DC bias voltage on MIC pathC305 = 2.3V?NOCheck the MIC Bias Circuit PathYESMIC Filter circuitaround UCP100 is OK?Is the assembled status ofMicrophone OK? Reassemble MicrophoneYESNONOYESENDResolder MIC Filter Circuitor Check UCP100Microphone does not workCheck the DC bias voltage on MIC pathC305 = 2.3V?NOCheck the MIC Bias Circuit PathYESMIC Filter circuitaround UCP100 is OK?Is the assembled status ofMicrophone OK? Reassemble MicrophoneYESNONOYESENDResolder MIC Filter Circuitor Check UCP100