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5.2.2 MIC Trouble
MIC is not working
Connect the Phone to
Network Analyzer
Check the signal level at the
point U803, PIN9(R601).
The level is 2.0V
Check the signal level at the
U601, PIN5 and U602, PIN5
after putting audio signal in MIC.
A few hundreds
of mV of signal levels
are measured.
Check the connectivity of
R601 and 602.
Check the MIC.
END
Replace the U601 or
U602 which does not
have proper level.
YES
YES
NO
NO
Summary of Contents for LG500
Page 1: ...GSM Phone SERVICE MANUAL MODEL LG 500 SERVICE MANUAL MODEL LG 500 ...
Page 37: ... 36 6 PCB Diagram Testpoint Description ...
Page 38: ... 37 6 PCB Diagram Testpoint Description ...
Page 39: ... 38 ...
Page 41: ... 40 7 2 RF Block Diagram ...
Page 42: ... 41 8 Schematic Diagram 8 Schematic Diagram ...
Page 43: ... 42 8 1 Baseband ...
Page 44: ... 43 8 Schematic Diagram 8 1 1 Baseband ...
Page 45: ... 44 8 1 2 Memory devices ...
Page 46: ... 45 8 Schematic Diagram 8 1 3 Audio ...
Page 47: ... 46 8 1 4 MMI ...
Page 48: ... 47 8 Schematic Diagram 8 2 RF top schematic 8 2 1 Baseband parts in RF ...
Page 49: ... 48 8 2 2 Pascal RF ...
Page 50: ... 49 8 Schematic Diagram 8 2 3 Hitachi PA ...
Page 51: ... 50 ...
Page 62: ...2 Specification Feature 61 ...
Page 63: ...P N AMBB0000201 April 2001 ...
