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3. TECHNICAL BRIEF
(2) MIDI IC (YMU759B, U200)
The phone uses melody IC which makes the robust joyful melody sounds. 6 signals (MIDI_RST,
ADD0, RD, MIDI_CS, WR, MIDI_INT) from AD6525 are used to control the melody IC.
Melody data (DATA[8:15]) is transferred to melody IC and played by the dual mode speaker.
External 3.3V LDO (U202) is used for the MIDI chip because the maximum output current of
analog amplifier in melody IC is 300mA.
Figure 3-19. Circuit Diagram of MIDI-IC and external LDO.
(2012)
4.7u
C241
C240
0.1u
0.01u
C231
2.2u
C239
U202
5
BYPASS
4
GND1
GND2
7
VEN
6
VIN
2
1
VOUT
3
VOUT_SE
LP3981ILD-3.3
R239
0
82K
R233
R231
33K
10K
R238
3.3K
R235
0.1u
C234
2V8_VMEM
1000p
C233
C237
47p
R237
0
C236
47p
390p
C232
10K
R232
R230
HPOUT_R
5
IFSEL
PLLC
6
32
SDOUT
17
SPOUT1
18
SPOUT2
15
SPVDD
SPVSS
16
7
VDD
9
VREF
VSS
8
29
_CS
3
_IRQ
_RD
31
_RST
4
_WR
28
30
CLK1
1
27
D0
26
D1
25
D2
24
D3
23
D4
D5
22
D6
21
D7
20
EQ1
12
13
EQ2
EQ3
14
EXT1
2
19
EXT2
10
HPOUT_L
11
U200
YMU759B
A0
0.1u
C238
C235
0.1u
0
DATA11
DATA12
DATA13
DATA14
DATA15
MIDI_CS
MIDI_INT
RD
MIDI_RST
WR
VMIDI_CTL
13MHZ
ADD0
DATA8
DATA9
DATA10
Summary of Contents for C3100
Page 1: ...Service Manual Model C3100 Service Manual C3100 P N MMBD0033001 Date June 2004 Issue 1 0 ...
Page 51: ...Graph 4 15 EGSM TX 50 VCX VC2 VCX VC2 4 TROUBLE SHOOTING Graph 4 14 DCS TX ...
Page 67: ...5 DISASSEMBLY INSTRUCTION Figure 5 1 Figure 5 2 66 5 DISASSEMBLY INSTRUCTION ...
Page 68: ... 67 5 DISASSEMBLY INSTRUCTION Figure 5 3 Figure 5 4 ...
Page 69: ... 68 Figure 5 5 5 DISASSEMBLY INSTRUCTION ...
Page 70: ... 69 5 DISASSEMBLY INSTRUCTION Figure 5 6 Figure 5 7 1 3 2 4 1 2 3 ...
Page 71: ... 70 Figure 5 8 Figure 5 9 5 DISASSEMBLY INSTRUCTION 4 2 3 1 2 1 ...
Page 72: ... 71 5 DISASSEMBLY INSTRUCTION Figure 5 10 ...
Page 83: ... 82 7 BLOCK DIAGRAM 7 BLOCK DIAGRAM Power supply ...
Page 90: ... 89 9 PCB LAYOUT 9 PCB LAYOUT ...
Page 91: ... 90 9 PCB LAYOUT ...
Page 98: ... 97 11 3 HW Test Software for Standalone Test Setup 11 STAND ALONE TEST ...
Page 100: ... 99 Tx Stand alone Test Setting 11 STAND ALONE TEST ...
Page 102: ... 101 Rx Stand alone Test Setting 11 STAND ALONE TEST ...
Page 104: ... 103 12 3 Equipment Setup Figure 12 1 Equipment Setup 12 AUTO CALIBRATION ...
Page 107: ... 106 12 AUTO CALIBRATION ...
Page 109: ... 108 13 EXPLODED VIEW REPLACEMENT PART LIST ...