- 55 -
3. TECHNICAL BRIEF
Basically, this phone have a melody IC of Yamaha Ltd.MA-2(nickname from Yamaha) is a
synthesizer LSI for mobile phones that realize advanced game sounds. This LSI has a built-in
speaker amplifier, and thus, is an ideal device for outputting sounds that are used by mobile phones
in addition to game sounds and ringing melodies that are replayed by a synthesizer.
The synthesizer section adopts “stereophonic hybrid synthesizer system” that are given advantages
of both FM synthesizers and Waveform table synthesizers to allow simultaneous generation of up to
thirty two FM tones and eight waveform table tones.
Since FM synthesizer is able to present countless tones by specifying parameters with only several
tens of bytes, memory capacity and communication band can be saved, and thus, the device
exhibits the features in operating environment of mobile phones such as allowing distribution of
arbitrary melodies with tones. On the other hand, since Waveform table synthesizer complies with
downloading of tones from host CPU, arbitrary ADCM/PCM tones can be treated from sequencer in
addition to the use of tones that are built-in the LSI.
Summary of Contents for G3100
Page 32: ... 34 3 TECHNICAL BRIEF Figure 3 20 TX IQ Signal Figure 3 21 RX IQ Signal ...
Page 40: ... 42 Figure 3 26 1 Voice band circuit diagram Headset Hands free kit part 1 3 TECHNICAL BRIEF ...
Page 42: ... 44 Figure 3 27 AD6521 circuit diagram 3 TECHNICAL BRIEF ...
Page 73: ... 75 4 3 8 Receiver RF Level Figure 4 1 Test Points of Rx Level 4 TROUBLE SHOOTING ...
Page 74: ... 76 4 3 9 Transmitter RF Level Figure 4 2 Test Points of Tx Level 4 TROUBLE SHOOTING ...
Page 81: ... 83 The Receiver part Circuit Diagram C203 C207 C206 4 TROUBLE SHOOTING ...
Page 87: ... 89 R202 MIC201 R204 C204 C201 R208 R206 C208 Q203 4 TROUBLE SHOOTING ...
Page 93: ... 95 Test SIM Connector Check J301 4 TROUBLE SHOOTING ...
Page 97: ... 99 J201 R240 C234 L201 R241 4 TROUBLE SHOOTING U205 U203 U204 ...
Page 101: ... 103 CN302 U203 U204 4 TROUBLE SHOOTING ...
Page 102: ... 104 U205 4 TROUBLE SHOOTING ...
Page 117: ... 119 9 PCB LAYOUT 9 1 Rear Part ...
Page 118: ...9 2 Front Part 120 ...
Page 134: ... 137 13 EXPLODED VIEW REPLACEMENT PART LIST 13 1 Exploded View ...