Huawei G700-U10 Maintenance Manual page 67

G700-U10 Smartphone
Maintenance Manual
Troubleshooting Process
Figure 10-34 Troubleshooting rear camera failures
Circuit Signals
Table 10-8 Circuit signals of this section
Signal
VCAM_AVDD
VCAM_DOVDD
VCAM_DVDD_DCDC Camera digital power supply
VCAM_AFVDD
CMMCLK
MIPI_CLKP
MIPI_CLKN
MIPI_DATAP0
MIPI_DATAN0
Issue 1.0 (2013-07-22)
Rear camera failure
Is the rear camera
normal?
Y
Is the rear camera BTB
connector normal?
Y
Is the power supply to the
Y
rear camera normal?
Y
Is the MIPI signal
normal?
Y
Replace U401
Description
Camera analog power supply
Camera digital power supply
Camera focusing motor's power
supply
Reference clock for the camera;
24 MHz
MIPI clock signal
MIPI clock signal
MIPI data signal
MIPI data signal
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N
Replace the rear camera module
Resolder or replace the BTB
N
connector
Check the three power supplies near
N
J1001 and then check U202
N
Resolder or replace T1001, T1002,
T1003, T1004, or T1005
10 Circuit and Failure Analysis
Reference Value or
Waveform
2.8 V
1.8 V
1.8 V
2.85 V
Digital pulse signal
High-speed digital pulse
signal
High-speed digital pulse
signal
High-speed digital pulse
signal
High-speed digital pulse
signal
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