Sim Card - Huawei U8950 Maintenance Manual

U8950 Maintenance Guide V1.0
Signal Name
HSED_HSKEY_AD
C
HS_DETECT
GND_MIC3

10.3.6 SIM Card

Circuit Block Diagram
2012-10-22
Function
Headset microphone
test
Headset insertion
detection
Grounding signal of
the headset
microphone
Huawei Proprietary and Confidential
10 Principles and Failure Analysis
Test Reference Value or Oscillogram
Voltage change
Voltage change
None
83