Circuit Analysis And Troubleshooting For The Modem Unit; Table 4-13 Definitions Of Signals Of The Sensor Circuit - Huawei MediaPad 10 fhd Maintenance Manual

MediaPad10 FHD Maintenance Manual
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Table 4-13 lists the signals of the sensor circuit.

Table 4-13 Definitions of signals of the sensor circuit

Signal Name
IIC0_SDA/SCL
SENSOR_2V6
4.4 Circuit Analysis and Troubleshooting for the Modem
Unit
Figure 4-22 shows the circuits of the modem unit.
2012-10-09
Circuit analysis
Sensors use IIC interfaces for communication. Their power supply is simple. The
working voltage is 2.6 V, and the I/O voltage is 1.8 V.
Fault analysis and location
Symptom: The sensors do not respond.
Solution: Check whether the power supply of the sensors is normal and whether the IIC
interfaces provide normal communication.
Circuit signals
Huawei Confidential
Function
IIC bus
Working power of sensors
INTERNAL
Test Reference Value or
Oscillogram
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