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6-7
A
Main Board Circuit Diagram:MT550 DDR CHB
12V_P
SCL
HA700
SDA
SCL
1
2
SDA
3
4
AOMCLK
AOMCLK
AOLRCK
5
AOLRCK
C69
6
7
AOBCK
AOBCK
AOSDATA0
AOSDATA0
8
0.1uF
AOSDATA1
1
9
10
AOSDATA2
AOSDATA1
AOSDATA3
AOSDATA2
11
CON_MUTE
AOSDATA3
12
13
VCC
MUTE
R189
14
VC
4.7K
CON14
DAC_RST#
AOMCLK
DAC_CS#
C719
100pF/6.3V/NC
MUTE
R732
0/NC
CON_MUTE
MT8550
GND
VCC
2
R139
3.3K
AMUTE
3
4
A
B
U7
DA_VDD
REFA
R138
100
3
1
R76
220
IN
OUT
CLOSED TO AKM4385
C939
C130
10uF
0.1uF/25V
C152
R176
100
0.1uF/25V
78L05
DAC Power Supply
3.3V
R183
AAMCLK
MUTEL
DA_VDD
1
16
MCLK
DZFL
AABCK
MUTER
2
15
BICK
DZFR
4.7K
AASDATA
3
14
SDTI1
VDD
AALRCK
4
13
LRCK
VSS
R191
330
FL+
5
12
PDN
AOUTL+
C150
6
11
FL-
+
CSN
AOUTL-
AVSCK
FR+
0.1uF/25V
C938
7
10
CCLK
AOUTR+
AVSDA
F R-
47uF/16V
8
9
CDTI
AOUTR-
U8
C109
4385DA
0.01uF
DAC
R214
33
AAMCLK
AOMCLK_R
33
R215
AABCK
AOBCK_R
R216
AASDATA
33
AOSDATA0_R
R956
NC
AOSDATA4_R
R217
AALRCK
DAC
33
AOLRCK_R
R90
1K
AVSCK
SCL
R91
1K
AVSDA
SDA
12V_P
R946
R947
0
0R/NC
5V_STBY/12V
Q13
3CG3906M
(
)
R100
4.7K
R133
10K
Q14
3CG3906M
+
CE27
470uF/16V
(
)
R147
4.7K
Q15
3DG3904M
R945
4.7K
R171
MUTE
22K
Q19
1
2
BAT54A
DA_VDD
Q51
9012(NC)
MUTE_L
R157
MUTEL
1K(NC)
Q49
9012(NC)
MUTE_R
R177
MUTER
1K(NC)
mute circuit
when using AK4385
B
C
D
R175
5.6K/1%
C121
680pF/50V/NP0
-12VA
FL-
R179
5.6K/1%
C123
U903B
R172
470/1%
3300pF
6
7
FL+
R153
5.6K/1%
R169
470/1%
5
NJM4558 OPA
R174
SOP8-244-1.27
C119
5.6K/1%
680pF/50V/NP0
+12VA
0R/NC
R103
REFA
R102
0R
R166
5.6K/1%
C120
680pF/50V/NP0
-12VA
F R-
R162
5.6K/1%
R104
C124
0R/NC
U903A
3300pF
R159
470/1%
2
C941
1
FR+
R160
5.6K/1%
R161
470/1%
3
10uF
NJM4558 OPA
R178
C122
SOP8-244-1.27
680pF/50V/NP0
5.6K/1%
R99
0R/NC
+12VA
REFA
0R
R101
R97
100
-12VA
R59
100
N12V
C942
C67
0.1uF/25V
4.7uF/16V/Y5V
R98
100
12V_P
R62
100
+12VA
C68
+
CE17
0.1uF/25V
100uF/16V
Power for OP/Close to OP
C
D
6-7
E
AUDIO CNT
AMUTE
DAC_RST#
DAC_CS#
SCL
SDA
AUDIO I2S for Audio Board
C940
AOMCLK
R181
470
LOUT1
AOLRCK
AOBCK
AOSDATA0
10uF
MUTE_L
R167
470
Q48
C126
AOSDATA1
3DG3904M
100pF/50V/X7R
AOSDATA2
R164
AOSDATA3
10K
AOSDATA0_R
AOSDATA4_R
AOMCLK_R
AOBCK_R
AOLRCK_R
AUDIO I2S for Main Board
AUDIO OUT
LOUT1
ROUT1
VCC
R173
470
ROUT1
MUTE_R
R152
470
Q50
C127
R180
3DG3904M
100pF/50V/X7R
10K
OP
only for BDP2600
+12VA
R86
33K
REFA
R87
C47
CE19
+
10K
0.1uF
100uF/16V
E
AMUTE
(5,7)
DAC_RST#
(6)
DAC_CS#
(6)
SCL
(6)
SDA
(6)
AOMCLK
(5)
AOLRCK
(5)
AOBCK
(5)
AOSDATA0
(5)
AOSDATA1
(5)
AOSDATA2
(5)
1
AOSDATA3
(5)
AOSDATA0_R (5)
AOSDATA4_R (5)
AOMCLK_R
(5)
AOBCK_R
(5)
AOLRCK_R
(5)
LOUT1
(8)
ROUT1
(8)
VCC
2
3
4
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