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2.2.1 Check Regulator(PMIC) Circuit
TEST POINT
Circuit Diagram
Checking Flow
+2.6V_TX
+2.8V_MSMP
+2.85V_TX_REG
+4.2 Vbatt
OK?
U201 Pin E14
TX ON High?
Replace U201
Replace U400
Regulator Circuit is OK
See Next Page to Check
VCTCXO
Check Pin
4, 13, 16, 29
U400
U201
YES
YES
NO
NO
U400
Pin 29
(+2.6V_Tx)
U400
Pin 16
(+2.8V_MSMP)
U400
Pin 4
(+4.2V_Vbatt)
U400
Pin 13
(+2.85V_TX_REG)
21
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Summary of Contents for LG-MC2670
Page 17: ...LG MC26 70 DCN Mode Graph 2 1 2 1763 04MHz DCN384 14 Z 3 X B O X C O M ...
Page 21: ...LG MC2670 Waveform DP101 Pin 5 Graph 2 1 4 c DP101 Pin 8 Graph 2 1 4 b 18 Z 3 X B O X C O M ...
Page 32: ...LG MC2670 Circuit Diagram 29 Z 3 X B O X C O M ...
Page 55: ...LG MC2670 Appendix Z 3 X B O X C O M ...
Page 56: ...Z 3 X B O X C O M ...
Page 58: ...Z 3 X B O X C O M TX Line RX Line Local Line RD2670 ...
Page 59: ...Z 3 X B O X C O M TX Line RX Line MIC Line SPK Line RD2670 ...
Page 60: ...Z 3 X B O X C O M RD2670 ...
Page 61: ...Z 3 X B O X C O M SPK Line MIC Line RD2670 ...
Page 65: ...Description LG Part No Q ty MAIN PCB SPFY0083001 1 2 PCB Z 3 X B O X C O M ...