Circuit Diagram - NAD M22 Service Manual

CIRCUIT DIAGRAM

1.MCU VM1.0
R136
VCLIP0
200R
R137
VCLIP1
200R
U102E
TL084
P100 TO AMP board A
GND 36 35 GND
-17.5V +17.5V
34 33
32 31
C101
30 29
C102
10N
28 27
10N
VPPi 26 25 VPPi
24 23
GND GND
VPNi 22 21
20 19 VPNi
18 17
R119
16 15 VDR-
0R
R120
GND 14 13 0R VDR+
12 11 -17.5V
S 10 9 +17.5V
5V
R121
8 7 GND
0R
G POb0 R130 R123 SCL
0R 6 5 0R
G PI0 R131 R126 S DA
0R 4 3 0R
R128 GPOa0
2 1 0R
R133 VCLIP0
0R
AudioS
R135
0R
D107 D106
4V7 4V7
GND GND GND
GPOa0
GPOb0
GPOa1
P101 TO AMP board A GPOb1
GND 36 35 GND
34 33
A-LED
32 31
-17.5V +17.5V W/R-LED
30 29
28 27
C109
VPPi 26 25 VPPi
C108
10N
24 23
10N
S CL
22 21
VPNi 20 19 VPNi
GND GND
18 17
R158 S DA
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 S CL
0R 6 5 0R
GPI1 R174 R169 S DA
0R 4 3 0R
GPOa1
R170
2 1 0R
VCLIP1
R177
0R
R178 AudioS
0R
D114 D113
4V7 4V7
GND GND GND
trig i n
1 1
J101A 17- 02001- 55 R284
5 P110
470R 232 gnd PB1 PB2
4
3
10KJ
2
R287
1 C165 D138
R288
100N
S W1 4v7 TO MAIN
2 1
S W(TOUCH)
232 gnd
W hi t e l ed br i ght ness ADJ
0.22u/ 16v
R100
C100
1K R101
47K
AudioS
5VA 2 5
1
3 6
R116 U100A
100K
LM324
GND 10
U100C
12 LM324 9
14
C105 13
10U
GND
9
8 3
GND
U102D 10 1
TL084 2
GND U102A GND
i d l i n g 0 V U102C TL084
R151 R152 R153
TP1 12
10K 330K 330K
14
TL084 470N
13
C112
U102B
R163 R164
TL084 5
12K R167 47K
7
10K
6
R171
+17.5V 2
10K
C114 C115
1U 10n
D111
C116
2N2
GND GND
ISS 352
GND
C117
2N2
R319
-17.5V D160
-17.5V 1K5
4v7
GND
GND
VAUXa
GND
D105
GND
4V7
VHP1
GND
3V3S
3V3D
R209A U104 C136
100R
R209B 1 16
N CK0 R219
100R q1 vcc GND 100R
R209C 2 15 N M OS I R222
100R q2 q0 100R
100N
R209D 3 14 NCS 1 R225
100R q3 ser 100R
R213A 4 13 R214 GPI0 R228
100R q4 /g 10K GND
100R
R213B 5 12
100R q5 rck
GPI1
R213C 6 11 R231
100R q6 sck 100R
R213D 7 10
100R q7 /sclr 3V3D
8 9
C140
gnd q'h 100R
100N
R226
74HC595
GND
3V3S R240
0R
R244
0R
3V3D 3V3D
D112
4V7
C164
P111
GND 3V3S
1 1 R285
100n
2 2 47KJ
U109
3 3 R286
3 4 TRI GON_OFF
4 4 a2 y2 120R
2 5
gnd vcc R289
TO MAIN 1 6 TRI GIN
a1 y1 120R
R290
GND
NC7WZ17
10R
100K 5VA
R111
D101 5VA
R112 R113 R114
7
5K6 5K6 10R 5VS
U100B ISS 352
Q104 C103
LM324
2SA1312 10U
U100D 5VA
LM324 D104
8 GND
R122
C104
R124
5K1
ISS 352 100N
U100E 100R
R129 LM324
100K GND
GND
GND AUDIO SENS E
VPP
2N2
R139
C107
R141
100R
Q113
BCV62B
1
1 VPPi
JP100
2
2
D110 3
3 VPPi
Q117 D109
15V
2SA1312
ISS 352
VPNi
C113
Q118
2
10U/35V JP101
2SC3324
R173
0 6 - 1 0 0 2 1 - 0 6 VPNi
GND
JP102
R179
GND
D159
4v7
CLIPPING CONTROL
GND
D118
3V6
C125
100N
R201
1k
D119
3V6
C133
100N
R208
10k
3V 3S
R210
180k
C137 MCLR U105
NC
R216 1 28 PG D A TA
22k MCLR/VPP/RE3 RB7/KBI3/PGD
2 27 PG CLK
RA0/AN0/C12IN0- RB6//KBI2/PGC
3 26 R 223
RA1/AN1/C12IN1- RB5/KBI1/PGM
100R
4 25
R 220
RA2 RB4/KBI0 100R
5 24 A udi oSa
RA3 RB3/AN9
6 23 R 229
RA4 RB2/INT2 100R
7 22 R 232
O V L
RA5/HLVDIN RB1/INT1
100R
8 21
R 233 nA M PO N
GND VS S RB0/INT0/FLT0/AN12 100R
9 20
OS C1/CLKIN/RA7 VDD 3V3S
10 19
OS C2/CLKOUT/RA6 VS S GND G N D
11 18 RXD
RC0 RC7/RX/DT
12 17 TXD
RC1 RC6/TX/CK
13 16
RC2 RC5/SDO
14 15
RC3/SCK/S CL RC4/SDI/S DA
R235
100R
PIC18F26K20
PWM-LED
R245
100R
Q132
L101
3V3D 3V3S 3V3S
742792662
3V3S
APM2313
GND R239 R241
10K 10k
C139
100N
GND
5VEN
Q135
DTC114E A C146 GND
K
1N
GND
GND
12
CON106
R309
POWER_ON
10K
D158 3V3D
4v7 GND
GND
PS _EN
VAUX+
VAUX-
FB100
nFATAL 8 1
OVL 7 2
nAMPON 6 3
AMPOFF 5 4
100M/600R
GND
5VS
R186
GND
S TB_EN
100
R203
VHP1 180k
VDR+
VPP
D TA 114
VDR-
Q 131
VPNi
DTC114EKA VPPi
STBY
Q105
D154 GND
b BAV99
3 RT1
R t NTC
D 123
Q120
4V 7
GND FMMT593TA
C 143
100N
C173
R327 100N
120K
GND
5VS
D124 C147
L102
GND 3V3S
742792662
ss12 100N MCLR
GND
PGDATA
PGCLK
C156
C155
100n 470U/6V3
C152
L103
10n
GND
C159
FB
100n
3V3S U108
ASM1117- 3.3
TXD R268
100R
RXD R269
100R
GND
D E B U G
XM102 XM101
HOLE HOLE
D140
ISS 352
D139
ISS 352
100R
R291
GND
C166
22N
XM104
XM100
HOLE
HOLE
D134
ISS 352
D136
ISS 352
R282
C162 100R
22N
GND
XM103
HOLE
D141
ISS 352
D142
ISS 352
100R
R292
GND
5VS
C167
22N
P103
10
9
8
7
6
5 R323
Q124
VAUX+
4 0.47
3
C177
2
1 2 10U
1
C182
A1220
D168
FROM PS U BAV99 D170 1U
D162 16V
15V
22k
GND C178 GND
R333
Q121 47P D166
P112
C183 BC846B CD4148WP
1 10U R348 R338
2 GND 680 680
HS 1
3
Q122
FROM STB BC846B
H eat si n k
P105
1
2 GND
R324
3 Q123
VAUX- -17.5V
4 0. 47
5
6
2 1 C184
From PS U C181 10U
C2690
D163 BAV99 1U
D169
22k 16V
GND C179 GND
R335
BC856B 47P
BC856B
D167
C180 Q126
Q125
CD4148WP
10U
R347 R340
GND
680 680
D155
R346
3V6
GND
CON103
1
2
3
4
5
ICSP
3V3S
P109
4
3
2
1
Header 4
D135
ISS 352
D137
ISS 352
R283 100R
C163 22N
GND
D146
ISS 352
D147
ISS 352
100R
R293
GND
C168
22N
+17.5V
R185
C124
100N
VAUXa