i. MIDI function
MIDI data comes from DBB via Host I/F(D(0~7), A(0)). The data is decoded in YMU783 and converted
to analog signal via DAC block of YMU783. The analog midi signal is amplified with headphone
amplifier for ear-set, is amplified with speaker amplifier for speaker out. The amplified midi ring-tone
signal is delivered to speaker and MIDI sound is generated out from speaker to air.
ii. MP3/AAC DAC function
YMU783 has a I2S bus for digital audio. The decoded MP3/AAC digital data comes from
CL8237S4(MAP) via I2S bus(I2S_WS, I2S_SCK, I2S_SDO). The data goes to DAC block of YMU783
which converts the data to an analog audio signal. The converted analog MP3/AAC signal is amplified
with headphone amplifier for ear-set, is amplified with speaker amplifier for speaker out. The sound
path of MP3/AAC signal is same as MIDI signal.
In all of cases, the volume control is performed in volume stage of analog mixer and amplifier stage,
which is built in YMU783.
3. H/W Circuit Description
- 27 -
Figure 12. MIDI IC(YMU783, YAMAHA) circuits
MIDI_SPKPHN_HS_CKTs
C116
C117
100p
100p
33K
R110
1u
NA
C122
C109
L103
100nH
I102
I101
C105
0.1u
0.1u
C118
C128
100p
3.3K
R107
I103
NA
R341
0.1u
C107
1u
C103
MIDI_INT
L102
100nH
C114
0.1u
C115
0.1u
68K
R109
0
R108
C101
10u
0.1u
C110
C106
0.1u
C104
0.1u
0.1u
C129
0.1u
C130
C108
0.1u
22n
C123
C119
47p
C314
1000p
100nH
L105
1000p
C127
E1
H5
VREF
_CS
D8
B5
_IRQ
_RD
E8
_RST
E3
D9
_WR
100nH
L101
G7
NC8
H3
H7
NC9
E9
PLLC
E2
RXIN
SDI
B4
H2
SPOUT1L1
SPOUT1L2
J1
SPOUT1R1
H8
SPOUT1R2
J9
J2
SPOUT2L
J8
SPOUT2R
G1
SPVDDL
G9
SPVDDR
H1
SPVSSL
H9
SPVSSR
TXOUT
J7
B8
IOVDD1
IOVDD21
D2
D3
IOVDD22
IOVDD23
D4
C2
LED0
LED1_GPIO4
B2
LED2_GPIO5
C3
LRCK
C5
MTR
B1
NC1
A1
NC2
A9
E7
NC3
NC4
F7
NC5
G3
NC6
G5
NC7
DVSS2
EQ1L
F1
EQ1R
F9
F2
EQ2L
EQ2R
F8
EQ3L
G2
G8
EQ3R
J6
EXC
EXTIN
F3
EXTOUT
H6
C4
GPIO0
GPIO1
A3
B3
GPIO2
GPIO3
A2
G6
HPC
G4
HPOUTL_MONO
HPOUTR
J5
BBL
J3
H4
BBR
A4
BCLK
C8
CLKI
D0
A8
D1
A7
B7
D2
D3
C7
A6
D4
D5
B6
C6
D6
D7
A5
DVDD1
C1
DVDD2
C9
B9
DVSS1
D1
YMU783
U102
D7
A0
J4
AVDD
AVSS
C121
NA
_MIDI_RST
TCH_LDO_EN
D(0)
MCLK
I2S_SDO
VIBRATOR
HSOL
HSO_R
_MIDI_CS
MIDI_INT
_RD
_WR
SPK_RCV_N
SPK_RCV_P
HSO_L
D(7)
D(6)
D(5)
D(4)
D(3)
D(2)
D(1)
A(0)
I2S_SCK
I2S_WS
HSOR
Содержание MG810c
Страница 1: ...Date May 2006 Issue 1 0 Service Manual MG810c MG810d Service Manual Model MG810c MG810d ...
Страница 3: ... 2 ...
Страница 5: ......
Страница 46: ...4 TROUBLE SHOOTING 45 WR CS ADSSSSS CS ADSSSSS WR ...
Страница 52: ...4 TROUBLE SHOOTING 51 G 1 Speaker Receiver Trouble Shooting Common Path ...
Страница 53: ...4 TROUBLE SHOOTING 52 G 2 Speaker Receiver Trouble Shooting Acoustic Path ...
Страница 54: ...4 TROUBLE SHOOTING 53 G 3 Speaker Receiver Trouble Shooting MP3 AAC Path ...
Страница 55: ...4 TROUBLE SHOOTING 54 G 4 Speaker Receiver Trouble Shooting FM Radio Path ...
Страница 56: ...4 TROUBLE SHOOTING 55 G 5 Main Mic Path Trouble Shooting ...
Страница 57: ...4 TROUBLE SHOOTING 56 G 6 Ear Mic Receiver Path Trouble Shooting ...
Страница 58: ...4 TROUBLE SHOOTING 57 G 7 Ear Mic Mic Path Trouble Shooting ...
Страница 59: ...4 TROUBLE SHOOTING 58 G 8 Vibrator Trouble Shooting ...
Страница 60: ...4 TROUBLE SHOOTING 59 4 2 RF Part Troubleshooting A RF Receiving Path Trouble Shooting ...
Страница 64: ...4 TROUBLE SHOOTING 63 E RF Receiving Path Trouble Shooting FEM 1 ...
Страница 65: ...4 TROUBLE SHOOTING 64 F RF Receiving Path Trouble Shooting FEM 2 ...
Страница 67: ...4 TROUBLE SHOOTING 66 H RF Transmitter Path Trouble Shooting ...
Страница 73: ...4 TROUBLE SHOOTING 72 N RF Transmitter Path Trouble Shooting FEM 1 ...
Страница 74: ...4 TROUBLE SHOOTING 73 O RF Transmitter Path Trouble Shooting FEM 2 ...
Страница 84: ...6 Block Diagram 83 6 Block Diagram ...
Страница 85: ... 84 ...
Страница 96: ... 95 8 PCB LAYOUT ...
Страница 97: ... 96 8 PCB LAYOUT ...
Страница 98: ... 97 8 PCB LAYOUT ...
Страница 99: ... 98 8 PCB LAYOUT ...
Страница 100: ... 99 8 PCB LAYOUT ...
Страница 101: ... 100 8 PCB LAYOUT ...
Страница 111: ... 110 ...
Страница 113: ... 112 ...
Страница 133: ...Note ...
Страница 134: ...Note ...