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Only for training and service purposes
LGE Internal Use Only
4.4.3 Checking Bluetooth In/Out and Power Supply Circuit
TP1 Check C304
Similar to bellow Graph 1.1?
Start
NO
NO
YES
Press “##5473784236368” + “
SEND
”+ “000000” in Phone idle state
Press “5” FCC Test
Press “3” Bluetooth FCC
Press “8” DUT mode
Spectrum analyzer setting, Oscilloscope setting
Check Bluetooth Intenna or
Antenna Matching Network
TP2 Check Pin10 of U302
+2.6V_MSMP2 is OK?
YES
The Problem may be Logic Part
Refer to Logic Troubleshoot
TP3 Check Pin14 of U302
+2.8V_BT is High OK?
YES
TP4 Check Pin9 of U302
NO
The Problem may be PMIC
Refer to PMIC and Replace U401
Similar to bellow Graph 1.2?
NO
The Problem may be RF Part
Refer to RX Troubleshoot
YES
Replace U302
Graph 1.1
Graph 1.2
Z3X-BOX.COM
Summary of Contents for VX8350
Page 132: ...1 Assembly and Disassembly Diagram Z 3 X B O X C O M 131 ...
Page 133: ...Z 3 X B O X C O M Internal Use Only 132 ...
Page 134: ...Z 3 X B O X C O M Internal Use Only 133 ...
Page 135: ...2 Block and Circuit Diagram Z 3 X B O X C O M 134 ...
Page 149: ...3 Part List Z 3 X B O X C O M 148 ...
Page 160: ...4 Components Layout Z 3 X B O X C O M 159 ...
Page 164: ...F100 F101 F102 cam3 cam4 CON100 CON102 Z 3 X B O X C O M Internal Use Only 163 ...
Page 165: ...CON2 Z 3 X B O X C O M Internal Use Only 164 ...
Page 167: ...CON103 Z 3 X B O X C O M Internal Use Only 166 ...
Page 168: ...VX8350 CAM_REV1 0 SPKY 0047501 SW100 CON102 Z 3 X B O X C O M Internal Use Only 167 ...
Page 169: ...CON103 Z 3 X B O X C O M Internal Use Only 168 ...