Circuit Diagrams - NAD M27 Service Manual

CIRCUIT DIAGRAM
1.MCU BOARD
P100 TO AMP board A
XM102
GND 36 35 GND HOLE
-17.5V +17.5V
34 33
32 31
C10
1
30 29
10N C102
28 27
10N
VPPi 26 25 VPPi
24 23
GND GND
VPNi 22 21
20 19 VPNi
18 17
R119
16 15 0R VDR-
R120
GND 14 13 0R VDR+
12 11 -17.5V
5VS 10 9 +17.5V
R121
8 7 0R GND
GPOb0 R130 R123 SCL-a
0R 6 5 0R
GPI0 SDA-a
R131 R126
4 3
0R 0R
GPOa0
R128
2 1
0R
D105
A
4V7
R133 VCLIP0
0R
R135 AudioS
0R
P101 TO AMP board A
GND 36 35 GND
34 33
32 31
-17.5V +17.5V
30 29
28 27
C109 C108
VPPi 26 25 VPPi
10N
24 23 10N
22 21
VPNi 20 19 VPNi
GND GND
18 17
R158
16 15 0R VDR-
R161
GND 14 13 0R VDR+
12 11 -17.5V
5VS 10 9 +17.5V
R165
8 7 3K9 GND
GPOb1 R172 R168 SCL-a
0R 6 5 0R
GPI1 R174 R169 SDA-a
0R 4 3 0R
R170 GPOa1
2 1 0R
D112
4V7
VCLIP1
R177
0R
R178 AudioS
0R
P102
-17.5V +17.5V
GND 36 35 GND
34 33
TO AMP board A
32 31
C118
C119
30 29
10N 10N
28 27
VPPi 26 25 VPPi
GND GND
24 23
22 21
VPNi 20 19 VPNi
18 17
R184
16 15 VDR-
0R
R187
GND 14 13 0R VDR+
12 11 -17.5V
5VS 10 9 +17.5V
R188
8 7 10K GND
GPOb2 R196 R192 SCL-a
0R 6 5 0R
GPI2 R198 R193 SDA-a
0R 4 3 0R
R194 GPOa2
2 1 0R
D115
4V7
R199 VCLIP2
0R
R200 AudioS
0R
P104
GND 36 35 GND
34 33 -17.5V +17.5V
32 31
30 29
C135
C134
28 27
10N
VPPi 26 25 VPPi 10N
24 23
22 21 GND GND
SCL-b
VPNi 20 19 VPNi
18 17
R211 SDA-b
16 15 0R VDR-
R212
GND 14 13 0R VDR+
12 11 -17.5V
5VS 10 9 +17.5V
R215
8 7 GND
18K
GPOb3 R224 R217 SCL-b
0R 6 5 0R
GPI3 R227 R218 SDA-b
0R 4 3 0R
R221 GPOa3
2 1 0R
D120
TO AMP board A
4V7
R234 VCLIP3
0R
R236 AudioS
0R
P106
TO AMP board A
GND 36 35 GND
-17.5V +17.5V
34 33
32 31
30 29
C145 C144
28 27
10N
10N
VPPi 26 25 VPPi
24 23
GND GND
22 21
VPNi 20 19 VPNi
18 17
R246
16 15 0R VDR-
R247
GND 14 13 0R VDR+
12 11 -17.5V
5VS 10 9 +17.5V
R248
8 7 27k GND
GPOb4 R254 R251 SCL-b
6 5
0R 0R
GPI4 SDA-b
R255 R252
4 3
0R 0R
GPOa4
R253
2 1
0R
D125
4V7
R256 VCLIP4
0R
R257 AudioS
0R
P108
-17.5V +17.5V
GND 36 35 GND
34 33
32 31
C160
30 29 C161
10N
28 27 10N
VPPi 26 25 VPPi
GND GND
24 23
22 21
VPNi 20 19 VPNi
18 17
R272
16 15 0R VDR-
R273
GND 14 13 0R VDR+
12 11 -17.5V
5VS 10 9 +17.5V
R274
8 7 47K GND
GPOb5 R278 R275 SCL-c
0R 6 5 0R
GPI5 R279 R276 SDA-c
0R 4 3 0R
R277 GPOa5
2 1 0R
D131
TO AMP board A
4V7
VCLIP5
R280
0R
AudioS
R281
0R
P111
1
2
3
4
XM104 XM103 XM105
HOLE HOLE HOLE
D140 D146 D141 D148
ISS352 ISS352 ISS352 ISS352
D139 D147 D142 D149
ISS352 ISS352 ISS352 ISS352
100R
100R 100R 100R
R291 R293 R292 R294
GND GND GND GND
C168
C167
C166 C169
22N 22N
22N 22N
D106 D107
GND GND GND
4V7 4V7
AudioS
3V3D C170
100N
VCLIP0 R136
GND 200R
VCLIP1 R137
200R
VCLIP2 R138
200R
U110 VCLIP3 R140
200R
8 1
VCC NC
SCL-a 7 2 SCL
SCL1 SCL0
i d l i n g 0 V
SDA-a 6 3 SDA TP1
SDA1 SDA0
R157
10K
5 4 VCLIP4 R159
EN GND GND 200R
VCLIP5 R162
200R
PCA9515 VCLIP6 R166
200R
R332
+17.5V
D113 D114
GND GND GND
4V7 4V7
U102E
TL084
-17.5V
3V3D
GND
GPI0
GPI1
D116 D117 GPI2
GND GND GND
4V7 4V7 GPI3
GPI4
GPI5
GPI6
GPI7
C171
3V3D
100N
GND
U111
8 1
VCC NC
GPOa0 R209A
100R
7 2 SCL GPOb0 R209B
SCL1 SCL0 100R
GPOa1 R209C
100R
6 3 SDA GPOb1 R209D
SDA1 SDA0 100R
GPOa2 R213A
100R
5 4 GPOb2 R213B
EN GND GND 100R
GPOa3 R213C
100R
PCA9515 GPOb3 R213D
100R
D121 D122 GPOa4 R230A
GND GND GND 100R
4V7 4V7 GPOb4 R230B
100R
GPOa5 R230C
100R
GPOb5 R230D
100R
GPOa6 R237A
100R
GPOb6 R237B
100R
A-L ED R237C
XM100 XM101 100R
W/R-L ED R237D
HOLE HOLE 100R
GND
D135
D134
ISS352
ISS352 VPPi
D137
D136
ISS352
ISS352 D154
R282 100R R283 100R
BAV99
C162 22N
C163
22N
3
GND GND
Rt
D126 D127
GND GND GND
4V7 4V7
R326
120K
3V3D C172
100N
GND
GND
U112
8 1 D128
VCC NC GND
4V7
CL-c 7 2 SCL VCLIP6
S
SCL1 SCL0
AudioS
SDA-c 6 3 SDA
SDA1 SDA0
5 4
EN GND GND
PCA9515
D132 D133
GND GND GND
4V7 4V7
C164
GND 3V3S
R285
100n
47KJ
U109
R286
R290 R350 3 4 TRIGON_OFF
a2 y 2 120R
47KJ 2 5
gnd vcc R289
1 6 TRIGIN
10R
a1 y 1 120R
G101
GND NC7WZ17
PESDNC3D5VB
0.22u /16v
R100
C100
1K R101 100K
47K R111
5VA 2 5
1
3 6
R116
U100A U100B
100K
LM324 LM324
U100D
GND 10 LM324
U100C
12 LM324 9
14
C105 13
R129
10U
100K
GND
9
8 3
GND
U102D 10 1
TL084 2
U102A GND
U102C TL084
R151 R152 R153
12
10K 330K 330K
14
TL084 470N
13
C112
U102B
R163
R164
TL084 5
R167
6K8 47K
7
R333 10K
6
Q118
6K8 10K
R171
10K 2SC3324
C114 C115
D111 1U
10n
C116
2N2 GND
ISS352
GND
C117
2N2 R319
GND D160
-17.5V 1K5
4v7
NCK1
NCS2
GND 3V3D
100n
U103
HC165
C120
1
SH/LD 3V3D GND
15 C121
CLK IN H
2 100N
CLK
10
SER
11
A R197
12 9 NMIS O
B QH 100 R
13 7
C QH GND
1 4
D
3
E
4
F
5 R201
G GND 10k
6
H VAUXa
GND
GND
R208
GND 10k
U104 3V3D C136 R210
VHP1 33k
1 16
q1 vcc GND
2 15
q2 q0
3 14 100N NMOSI C137
q3 ser GND
4 13 R214 NC
q4 /g 10K GND
5 12 NCS1 R216
q5 rck 3V3S 22k
6 11 NCK0
q6 sck
7 10 NCK1
R219
q7 /sclr 3V3D
100R
8 9 NCK0 R222
C140
gnd q'h 100R 100R
NMOSI R225
100N
R226 100R
74HC595
GND NCS1 R228
100R
U106 3V3D C141 3V3S NCS2 R231
100R
1 16
q1 vcc GND
2 15 NMIS O R235
q2 q0 100R
3 14 100N
q3 ser
4 13
q4 /g
5 12
q5 rck
6 11
q6 sck
7 10 SCL R240
q7 /sclr 3V3D R107
0R
8 9
gnd q'h 10K
3V3D R108
74HC595 SDA R244
10K 0R
RT1
GND 35 36 GND
NTC(NC) -17.5V +17.5V
33 34
31 32
C149
29 30
Q120 C148
10N 27 28
FMMT593TA 10N
VPPi 25 26 VPPi
23 24
GND GND
R327
21 22
VPNi 19 20 VPNi
120K 17 18
R329 D155
R258
VDR- 0R 15 16
4K3 10K C173
R259
R328 VDR+ 0R 13 14 GND
100N 3V6
-17.5V 11 12
+17.5V 9 10 5VS
R260
GND 82K 7 8
SCL-c R261 R266 GPOb6
0R 5 6 0R
SDA-c R262 R267 GPI6
0R 3 4 0R
GPOa6 R263
0R 1 2
D129 D130 P107
GND GND
4V7 4V7
R270
0R
R271
0R
12
5VA
D101 5VA
R112 R113 R114
7
5K6 5K6 10R 5VS
ISS352
Q104 C103
2SA1312 10U
5VA
D104
8 GND
C104 R122
R124
ISS352 100N 5K1
U100E 100R
LM324
GND
GND
AUDIO SENSE
GND
VPP
2N2
R139
C107
R141
100R VPPi
1
Q113
2
BCV62B
3
4
5
6
D110
7 VPPi
Q117
D109
15V
2SA1312 JP101 JP102
ISS352
1 VPNi 1 GND
C113
2 2
10U/35V
3 3
R173
4 4
5 5
6 6
7 VPNi 7 GND
R179
D159
CLIPPING CONT ROL
4v7
GND
C124 C187
100N NC
+17.5V
GND
D118
C129 C188
3V6
100N NC
C125
100N
D119
3V6
C133
100N 3V3S
MCLR U105
DTA114
1 28 PGDATA Q131
MCLR/VPP/RE3 RB7/KBI3/PGD
27 PGCLK
2
RA0/AN0/C12IN 0- RB6//KBI2/PGC
26 STBY
3 R223
RA1/AN1/C12IN 1- RB5/KBI1/PGM
100R
4 25 R220
RA2 RB4/KBI0 100R
5 24 AudioSa
RA3 RB3/AN9
6 23 R229
RA4 RB2/IN T2 100R
7 22 R232 OVL
RA5/HLVDIN RB1/IN T1 100R
8 21 R233 nAMPON
GND VSS RB0/IN T0/FLT0/AN12 100R
9 20
OSC1/CLKIN /RA7 VDD 3V3S
10 19 D123
OSC2/CLKOUT/RA6 VSS GND GND
11 18 RXD 4V7
RC0 RC7/RX/DT
12 17 TXD
RC1 RC6/TX/CK
13 16 R238
RC2 RC5/SDO 100R
14 15
RC3/SCK/SCL RC4/SDI/SDA
PIC18F26K20
R245 PWM-L ED
100R
3V3D 5VD 3V3S
3V3S
C139
C150 C151
100N
22u/ 6V3 22u/ 6V3
100n 100n
C157 C158
GND
3V3D U107
ASM1117- 3.3
GND GND
CON106
R309
POWER_ON
10K
5VS
D158
3V3D
4v7
GND
GND P103
10
PS_EN
9
8
+17.5V
7
-17.5V
6
FB100
5
nFATAL 8 1
4
OVL 7 2
3
nAMPON 6 3
2
AMPOFF 5 4
1
100M/600R
GND FROM regulated supply
P112
5VS 1
R186
GND 2
STB_EN
100 3
FROM STB
R203
P105
VHP1 0R
VDR+ 1
VPP 2
3
VDR- 4
VPNi 5
6
GND
From PSU
b
5VS 5VD
Q105
C142
DTC114EKA L101
Q132 742792662 220U/10V
GND APM2313
C143 GND
100N
DTC114EKA
5VEN Q135
C146
1N
GND GND
5VS
D124 C147
L102
GND 3V3S
742792662 CON103
MCLR
ss12 100N
1
2
GND 3
PGDATA
4
PGCLK
5
C156
C155
ICSP
100n 470U/6V3
C152
L103
10n
GND 3V3S
C159
FB
100n
3V3S U108 P109
ASM1117- 3.3
4
TXD R268
100R 3
RXD R269
100R 2
GND 1
DEBUG Header 4