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G700-U10 Smartphone
Maintenance Manual
Troubleshooting Process
Figure 10-60 Troubleshooting Wi-Fi failures
Circuit Signals
Table 10-20 Circuit signals of this section
Signal
MC2_DAT0_6628–
MC2DAT3_6628
MC2_CMD_6628
MC2_CLK_6628
WIFI_INT_B_6628
10.4.17 Bluetooth Module Circuit
Circuit Diagram
See section 10.4.16 "Wi-Fi Module Circuit" for the module's circuit diagram.
Circuit Analysis
The Bluetooth function is provided by the MT6628Q, too. The BT module uses the PCM
interface for signal transmission. The Bluetooth antenna connects to the antenna on the phone
housing through the spring J2301. The Wi-Fi module and Bluetooth module share the
antenna.
Issue 1.0 (2013-07-22)
Wi-Fi connection
failure
Is the 4-in-1 chip
U2200 properly
soldered?
Y
Is the Wi-Fi antenna
circuit normal?
Y
Resolder or
replace U401
Description
Wi-Fi data signal
Command signal
Clock signal
Reset signal
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
N
Resolder U2200
Re-install the antenna,
N
or resolder or replace
the surrounding
components, especially
U2301
Reference Value or Waveform
/
/
/
/
10 Circuit and Failure Analysis
86
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