NAD T 748, Руководство по обслуживанию

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FROM VOL PART
COMPONENT IDENTIFIED BY MARK HAVE SPECIAL CHARACTERISICS.
IMPORTANT FOR SAFETY. WHEN REPLACING ANY OF THESE COMPONENTS
USE ONLY MANUFACTURER'S SPECIFIED PARTS.
** THE UNIT OF RESISTANCE IS OHM.
K = 1000 OHM. M = 1000KOHM.
** THE UNIT OF CAPACITANCE IS MICROFARAD(uF)
pF = 10 uF
** THIS SCHEMATIC DIAGRAM MAY MODIFIED AT ANY TIME WITH THE
IMPROVEMENT OF PERFORMANCE.
-6
** IMPORTANT SAFETY NOTICE.
NC
VB
A
T
NC MCU
CEC 1
MCU
CEC 2
P
OWE
R
_
D
OWN
FA
N
1
_O
N
FA
N
2
_O
N
NC MI
C_I
N
MI
C_O
N
VSS VDD VO
L
_
U
P
VO
L
_
DO
W
N
FA
N
_
DET
ECT
VE
R.
O
P
T
IO
N
P
O
W
ER
_
P
R
O
T
ECT
OS
C
_
IN
OS
C
_
OUT
RE
SE
T
K
R
Y1
_I
N
KE
Y
2
_
IN
NC D
AB_
D
E
TE
C
T
VSSA VREF- VREF+ VDDA PD
/A
D
_
7511
PA
0-
W
K
U
P
IP
OD
_
T
X
IPOD_RX
VSS
VDD
DSP_SPI_CLK
DSP_SPI_DI
DSP_SPI_DO
DSP1_RESET
DSP1_CS
DSP1_ENA
NC
BOOT1
NC
CODEC_RESET
VSS
VDD
CODEC_CS
DSP_INT
DSP_AMUTEO
A_CLK_SEL1
A_CLK_SEL2
CODEC_CLK
CODEC_DI
CODEC_DO
VSS
VDD
TUNER_INT
TUNER_CLK
TUNER_SDIO
TUNER_RESET
TUNER_SEN
TUNER_MUTE
BACKUP_SCL
BACKUP_SDA
VSS
VDD
VFD_CS
VFD_CL
K
VFD_
RE
SE
T
VFD_DA
T
A
S
C
A
L
ER
_T
X
S
CA
L
ER
_R
X
1321_
SC
L
1321_
SD
A
HP_
IN
PRO
T
E
C
T
_
IN
VSS
VDD
NC
PO
W
E
R_
O
N
TR
IGGE
R
_
O
UT
ZO
N
E2
_MU
T
E
S
W
_MU
T
E
FU
N
CT
IO
N
_MU
T
E
SU
RR_
B
A
C
K_
M
U
T
E
CU
R
R
EN
T
_CH
K
V
O
L1_
M
U
T
E
VSS
VDD
VO
L
1
_
C
L
K
VO
L
1
_
D
A
T
A
VO
L
2
_
C
L
K
VO
L
2
_
D
A
T
A
IP
OD
_
D
E
T
U
P
DA
T
E_T
XD
UP
D
A
TE
_
R
X
D
NC
H
D
M
I_
R
X
_
OP
TION
JT
A
G
_JT
MS
NC VSS VDD
JTAG_JTCLK
JTAG_JTDI
HD RADIO_TX
HD RADIO_RX
DAB_TX
HD RADIO_RESET
XM_DAC_RESET
DAB_RX
XM/DAB_RST
XM_DAC_MUTE
HDMI_BYPASS
VSS
VDD
HDMI_MUTE_OUT
HDMI_I2S_SW
OSD_SCL
OSD_SDA
HDMI_SW1
ADV7844_RESET
ADV7844_INT
ADV7511_INT
VSS
VDD
REC_MUTE
JTAG_JTDO
JTAG_TRST
NC
HDMI_SCL
HDMI_SDA
BOOT0
REMOTE2_IN
REMOTE1_IN
OSD_H
OSD_CE
VDD
VSS
T
O
DSP &
CODEC/DIR
TO INPUT/VOLUME
F
_
SPK_
O
N
S_
SPK_
O
N
BS
_
S
P
K
_
O
N
HP_
R
LY
_
O
N
IPOD_RX
TUNER_INT
TUNER_CLK
TUNER_SDIO
TUNER_RST
FRONT PART <==> MCU PART
HDMI PART <==> MCU PART
HDMI <==> MCU PART
TO CODEC/DIR
TO DSP PART
CODEC
HD
R
A
D
IO
XM
/D
AB
TO VOL
TO MCU
HDRADIO
P
R
OTE
C
T_
IN
PO
W
E
R_
O
N
TUNER MODULE
L-OUT
R-OUT
VCC
SCLK
SDIO
/SEN
/RST
GPIO2
TUNER_SEN
TO VOL
P_
D
O
W
N
P_
O
N
MU
T
E_P
BS
R
BS
L
SR
SL
CN
T
FR FL
DC+12V
FRONT PART <==> MCU PART
TO HDMI B'D
FLASH MCU
2.5uA
+1
2
V
ST
+
5
V6
TO DSP
TO CODEC/DIR
Not USE
XM PART
IPOD_TX
AMP <==> MCU PART
SUB TRANS <=> MCU PART
PRE_AMP <==> MCU PART
ET101
Bottom
Top
TUNER_MUTE
NC
(MI
C)
DAB
2.0mm PITCH(5P)
DUAL SMD(18P)
2
.0
m
m PITCH(
1
5P)
1.0mm PITCH SMD(19P)
1.25mm PITCH(23P)
DUAL SMD(18P)
DUAL ANGLE(34P)
2.0mm PITCH(7P)
UPDA
T
E
Z
IG
N.
C
N.
C
N.
C
VS
S
SD
A
SC
L
WC VCC
FAN2
ON:70'C
M
FAN1
M
FAN2
FAN1
ON:60'C
F
R
O
M
M
A
I
N
B
'
D
DC+12V
DGND
DGND
+5. 6VD
+5. 6VD
DGND
DGND
+2. 5VD
+2. 5VD
DGND
DGND
+12VV
AGND
AGND
USA
EUR
10.11.16
TEMP_CHECK
GND
ST+5R6V
10.11.16
10.11.16
2.05V : FAN1_ON
1.91V : FAN2_ON
1.35V : PROTECT
144
143
142
141
140
139
138
137
136
135
133
134
132
131
130
129
128
127
126
125
124
122
123
121
120
119
118
117
116
115
114
113
112
111
110
109
108 107 106 105 104 103 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
IC101
STM32F103ZET6
C
1005
0.
1
C1037
0.1
C1038
0.1
C1040
0.1
C1045
0.1
C
1052 0.
1
C
1060 0.
1
C
1066 0.
1
C1070
0.1
C1080
0.1
C1091
0.1
C
1023
0.
1/16V
R1024
2.2
C
1024
22/
6.
3V
C
1025
0.
1/16V
L1025
BEAD
X1016
8M
R1085
10K
R1017
470
R1016
1M
C
1017
20P
C
1016
20P
R1083
100
R1084
100
R1003
10K
R1004
10K
R1042 100
R1044
100
R1041
4.7K
R1043
4.7K
8 7 6 5
4 3 2 1
RX
107
33X
4
R1050
100
C
1050
0.
1/16V
R1021
10K
R1020
10K
R1019 10K
1 2 3
OU
T
VD
D
GND
IC102
ML61C232PR
R1018
100
C
1018
0.
1/16V
R1002
0
C
1001
0.
1/16V
R1068
33
R1067
33
87
65
43
21
RX121
100X4
(Tuner)
Q1051
KRC107S
R1051
10K
C
1051
0.
1/16V
R1008
10K
R1007 10K
Q1055
KRC107S
Q1054
KRA107S
C1021
0.01/25V
C1020
0.01/25V
C1019
0.01/25V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15 17
16 18
19
22
23 21
20
CN111
R1022
OPEN C1022
OPEN
Q1089
KRC107S
R1089
10K
L1103
BEAD
C
1113
100/
6.
3V
C
1111
100/
6.
3V
C
1112 0.
1
C
1106 0.
1
C
1105
150/10V
D1199
1SR159-200
D1101
1SR159-200
D1198
1SR159-200
D1102
RB160L60
1 2 3 4
5 6 7 8
IC
1
0
3
M
24256B
W
M
N6T
P
R1040
10K
1
2
3
4
5
6
7
8
9
10
11
12
13
CN131
OPEN
C
1302
OP
E
N
C
1303
OP
E
N
C
1301
OP
E
N
C
1304
OP
E
N
2
1
3
GND
Out In
IC131 OPEN
HVILM1117S-3V3
D1301
OPEN
R1058
10K C
1059
0.
1/16V
C
1222
0.
01/25V
(T
u
n
er
)
C
1221
0.
01/25V
(T
u
n
er
)
C
1223
100P
(T
u
n
er
)
C
1224
100P
(T
u
n
er
)
C
1225
100P
(T
u
n
er
)
1
2
3
4
5
6
7
8
TUN01
C
1252
0.
1
(T
u
n
er
)(B
)
C
1251
10/16V (T
u
n
er
)
R1210
4.
7K
(T
u
n
er
)
R1209
4.
7K
(T
u
n
er
)
1 2 3
4 5 6
Q
1209
KT
C
812T
B
1
3 4
6
2
78
L1201
(Tuner)
R1201
270
(Tuner)
R1207
27K
(T
u
n
er
)
C
1201
OP
E
N
C
1203
8200P/25V
(T
u
n
er
)
C
1205
3900P (T
u
n
er
)
1
3 4
6
2
78
L1202
(Tuner)
R1202
270
(Tuner)
R1208
27K
(T
u
n
er
)
C
1202
O
PE
N
C
1204
8200P/25V
(T
u
n
er
)
C
1206
3900P
R1221
100(Tuner)
D1251
1SR159-200
(Tuner)
R1035
33
R1036
33
Q1213
KRC107S
(Tuner)
Q1212
KRA107S
(Tuner)
R1034
OPEN
R1061 10K
R1305
R1211
1M
(Tuner)
R1049
10K
R1031
33
R1032
15K
C
1032
0.
1/16V
R1030
47K
R1029
47K
R1028
47K
R1027
150K
R1033 OP
E
N
18
17
16
15
14
13
12
11
10
9
8
7
6
5 3
4
1
2
CN151
Q1092
KRC107S
R1093
10K
R1092
4.
7K
R1094
100K
1
2
3
4
5
6
7
8
9
CN121
Q1059
KRC107S
R1059
OP
E
N
87
65
43
21
RX108
33X4
R1306
OP
E
N
C
1306
OP
E
N
R1213
560
(Tuner)
R1214
560
(Tuner)
R1039
3.3K
D1039
1SS355
C
1039
10/16V
R1037
10K
R1005
0
1 2 3 4 5
BN101
R1060 10K
C
1198
150/10V
C
1197
150/10V
L1195
D1195
1SS355
R1195
10K
R1046
4.
7K
R1045
4.
7K
D1040
1SS355
C
1196
150/10V
C
1199
0.
1
R1190
C
1195 0.
1
C
1194 0.
1
D1095
4.3V
C1061
10/16V
1 2 3
VIN GND VOU
T
IC110
KIC3201S-33
C
1041
0.
1/16V
R1012
100K
R1120
0
R1121
0
R1091 4.
7K
2
1
4
3 5
6
7
8
9
10
11
12 14
13 15
16 26
25 23
24 22
21
20
19
18
17
28
27
30
29 33
34
31
32
BN161
L1196 BE
AD
R1056 0
R1055
0
D1096
9.1V
C
1181
150/10V
C
1180 0.
1
R3806 OPEN
R3807
OPEN
R3808 OPEN
R3809
OPEN
R3810 OPEN
R1086 OP
E
N
1 2 3 4 5 6 7
CN171
19
18 16
17 15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
CN162
R1101
100
R1102
100
R1611
OPEN
R1612
OPEN
1
2
3 45
6
IC161
OPEN
D
1611
OP
E
N
R1613 OP
E
N
C1009
0.1/16V
R1009
10Koh
m
R1010
10k
R1011
10k
T1001
T1002
R1047 100
R1048
100
D1200
1SR159-200
C
1210
100/16V
C
1211
100/16V
C
1212
0.
1
R1069
100
2 1
4 3
5 6
7 8
9
10
11 12
CN141
T1003
T1004 T1005
T1006
T1007
T1008 T1009
T1010
Q1301
KRC102S
R1303
10K
R1301
100
R1302
100
D1021
1SS355
D1022
1SS355
R1814
10
C
1812
OP
EN
Q1812
KRC107S
Q1811
KTA1271Y
D1811
1SS355
Q1814
KRC107S
Q1813
KTA1271Y
R1812
1W/47
R1815
100K
D4943
5.
6K
R1813
10K
R1811
100K
R1818
10K
R1819
5.
6K
1
2
CN181
1
2
CN182
D1812
1SS355
R1816
1W/4.7
C
1811
150u
F
/25V
C
1813
150u
F
/25V
L1811
R1821
10
C
1821
100/
16V
C
1823
0.
1u
F
C
1824
0.
1u
F
D
1
8
2
1
R
B
160L60
D
1
8
2
2
R
B
160L60
L1821
L1822
3
1
2
OUT IN
GND
IC182
KIA7912
3
2 1
4
VIN
ON/
OF
F
GND
VOU
T
IC181
KIA278R12
R1831
100K
C
1822
100/
16V
12
3
4
56
7
CN183
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
BN199
R1820
10
R1817
10
87
6
5
43
2
1
RX109
33X4
1 2 3 4 5 6 7
8 9 10 11 12 13 14
IC109
OPEN
C1011
0.1
R1072
0
R1073 OP
EN
R1071
0
3
2
1
BN201
5 4 3 2 1
IC221
LM94022BIMG
C2099
0.1uF
3
2
1
CN201
Q1095
KRC107S
R1095
10K
D1201
1SS355
R1081
10Koh
m
C1501
0.1
C1502
0.1
JW101
L1812
C
1503
OP
EN
D3091
1SR159-200
C
3091
0.
1
C
3090
150u
F
/10V
C
3094
150u
F
/10V
JTAG_TDO
DSP1_RST
DSP_SPI_CLK
DSP_SPI_DO
DSP_SPI_DI
DSP1_CS
DSP1_ENA
CODEC_RST
CODEC_CS
A_CLK_SEL1
A_CLK_SEL2
AMP
FRONT
HDMI&JTAG
HDMI_MUTE_OUT
VFD_CL
K
HP_
IN
VL
O
_
U
P
VO
L
_
DO
W
N
K
EY1
K
EY2
ZO
N
E2
_MU
T
E
S
W
_MU
T
E
S
B
_MU
T
E
MA
IN
_V
O
L
_MU
T
E
MA
IN
_V
O
L
_CL
K
MA
IN
_V
O
L
_DA
T
A
F_S
P
K
_O
N
S_
SPK_
O
N
BS
_
S
K
P
_
O
N
FA
N
1
_O
N
FA
N
2
_O
N
VFD_DA
T
A
VFD_
RST
HDRADIO_TX
HDRADIO_RX
JTAG_TRST
JTAG_JTDI
JTAG_JTCLK
JT
A
G
_JT
MS
RS232_
T
X
RS232_
RX
RE
SE
T
VFD_CS VFD_CL
K
VFD_DA
T
A
VFD_
RST
PREOUT_FL
PREOUT_CNT
PREOUT_SL
PREOUT_SR
PREOUT_BSL
PREOUT_BSR
PREOUT_SW
RE
M
O
T
E
_
IN
VO
L
_
DO
W
N
VL
O
_
U
P
ST+5V ST+3R3V
ST
+
5
V6
+12V
+5V6_SYS
ST+5V6
+5VD
+5V6_SYS
+5
V
D
_S
YS
DAB_TX
XM_DAC_RST
DAB_RX
XM/DAB_RST
XM_DAC_MUTE
HDRADIO_R
HDRADIO_M
HDRADIO_TX
HDRADIO_RX
DSP_AMUTO
FR
O
N
T
_L
FR
O
N
T
_R
TUNER_L
TUNER_R
MUTE_P
HDMI_SCL
HDMI_SDA
+1
2
V
-1
2
V
-12V
+7V
-7V
+5VA
RESET
CLIPPING_ON
OVER_CURRENT_CHK
HDRADIO_RST
HDRADIO_RST
CODEC_CLK
CODEC_DI
CODEC_DO
DSP1_INT
+12V
-12V
+2.5VH1
XM_LINK_ACT
CLIPPING_ON
+5VD_SYS
PREOUT_FL
PREOUT_FR
PREOUT_CNT
PREOUT_SW
PREOUT_SL
PREOUT_SR
PREOUT_BSL
PREOUT_BSR
REC_MUTE
PRO
T
E
C
T
_
IN
F_S
P
K
_O
N
S_
SPK_
O
N
B
S
_S
K
P
_O
N
HP_
R
LY
_
O
N
IP
OD
_
R
X
RE
A
R_
IR_
IN
RS232_
T
X
RS232_
RX
+5VD_SYS
HP_
R
LY
_
O
N
MI
C_I
N
MI
C_O
N
POWER_ON
HDMI_I2S_SW
OSD_SCL
ADV7844_RESET
ADV7844_INT
ADV7511_INT
OSD_H
K
EY2
K
EY1
HP_
IN
MI
C_O
N
MI
C_I
N
IP
OD
_
L
IP
OD
_
R
HDMI_SPDIF
HDMI_S0/DL0
HDMI_S1/DR0
HDMI_S2/DR1
HDMI_S3/DL1
HDMI_LRCK
HDMI_SCLK
HDMI_MCLK
ARC_SPDIF_OUT
OSD_SDA
A
D
V7844_
INT
A
D
V7511_
INT
PD
/A
D
_
7511
HD
M
I_
I2S_
S
W
HD
M
I_
S
D
A
HD
M
I_
S
C
L
A
D
V7844_
R
E
S
E
T
H
D
MI
_MU
T
E_O
U
T
1321_
SC
L
1321_
SD
A
O
S
D_CE
OS
D
_
S
D
A
OS
D
_
S
C
L
OS
D
_
H
ST+3R3V
ST+5V
CEC
CEC
PROTECT_IN
JTAG_TDO
JTAG_JTCLK
JTAG_JTMS
JTAG_JTDI
JTAG_TRST
OSD_CE
P_
D
O
W
N
PRO
T
E
C
T
_
IN
F_S
P
K
_O
N
S_
SPK_
O
N
BS
_
S
K
P
_
O
N
HP_
R
LY
_
O
N
RS232_
RX
RS232_
T
X
RE
A
R
_
IR_
IN
IP
OD
_
R
X
IP
OD
_
T
X
P_
D
O
W
N
PO
W
E
R_
O
N
OVER_CURRENT_CHK
PD
/A
D
_
7511
+5VD_DAB
DA
B
_
DET
ECT
DAB_DETECT
F_OPTICAL_IN
IP
OD
_
D
E
T
IP
OD
_
D
E
T
HV_GND
HV_GND
HV_GND
HV_GND
HV_GND
FAN1_ON
FAN2_ON
+12V
HV_GND
+12V
DC+12V
DC+12V
-12V
+12V
MUTE_P
ST+5V
PREOUT_FR
HDRADIO_L
IPOD_RX
IPOD_TX
FUN
C
_
M
UT
E
REAR_IR_IN
REMOTE_IN
OV
E
R
_C
U
R
R
E
N
T
_C
HK
SIGNAL_CHK
S
IGN
AL
_C
HK
TE
MP_
C
HK
TEMP_CHK
ST+5V6
+5
VD
_
S
YS
+5VA
1321_SCL
1321_SDA
SCHEMATIC DIAGRAM (MCU PART)
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