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5.2.4 Melody Trouble
Melody is not heard
Check the connectivity
of speaker.
The connection
is OK
Check the level of U605,
PIN5(VCC3V).
The level is
high(3V)
Connect the speaker
to the phone properly.
Check whether the
melody signal(a few hundreds
mV) is out from the U603.
12 or U603.11.
Replace the LDO(U605)
Replace the Melody IC,
(U603).
END
YES
YES
YES
NO
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 ...
