Schematic Diagram - NAD C 426 Service Manual

SCHEMATIC DIAGRAM

KEY / MCU / DISPLAY
M210
REMOTE
SENSOR
C201
100u
C202
0.01u
1 GND
SG[01:18]
2 IR-IN
3 GND
GND
4 F1
5 +3V3-SDBY
6 F2
7 +5V-D
STB
8
9 CLK
10 DIN
KEY-B
11
LED-G
12
KEY-A
13
LED-R
14
-VP
15
J202A
R219
M201
680R
BLEND
GND R222
680R
M205
FM/AM
M202
R220
MEMORY
820R
GND
GND
M206
MODE
R252
M203
820R
R221
FM MUTE
1K8
GND
GND
M204
MODE
GND
KEY1-PCB
C204
100u
C205
104K C206
16
104K
2 Vcc
V+
C207
104K
6
5 V-
9
4
14
8 T1
R208 75R
3
7
7
2
T2
6 R209 75R
1
J201
13
R1
DB9
8
R2
C203
GND
15
223
CHGND
GND
J301B
+3V3-SDBY
POWER-ON
FM 106.2 MHz
M209
VFD
C211
0.1U
C210
100u
40
SG12 26
SG12 GR5
GND SG11 25 41
SG11 GR4
42
SG10 24
SG10 GR3 R215 R216
43
SG09 23 470R 470R
SG9 GR2
SG08 22 44
SG8 GR1
SG07 21 45
SG7 VDD
SG06 20 46
SG6 LED5
SG05 19 47
SG5 LED4
SG04 18 48
SG4 LED3
SG03 17 49
SG3 LED2
SG02 16 50
SG2 LED1
SG01 15 51
SG1 GND
14 52
VDD OSC
U202
PT6311 R225
10K
R211 120R
C
R250 Q201
B
DTC114 4 D209A
4
4
4
4K7
R210
GREEN
E 3
3 3
3
100R
2
2
2
2
1
1
1
1
J203A M207 POWER ON
J203B
LED PCB
C208
104K
C209
104K
1
C1+
3
C1-
4
C2+
5
C2-
11
10
12
9
U204
MAX232
J201B
J201A
VR201
KEY2-PCB
C709
100u
C212 C213
100u 0.1U
R227 U3
LM1117-3V3
56K
IN
OUT
+5V-D
D208
GND
SR2100
GND
+3V3-SDBY
D209B
RED
28
P2.7
27
P2.6
26
P0.1
FM-STEREO
25
P0.2
FM-SD
24
DATA-OUT P0.3
23
P0.4
22
TUNER-MUTE
P0.5
21
VDD
20
CE-PLL P0.6
19
CLK P0.7
18
P1.0
17
P1.1
16
DATA-IN P2.5
15
POWER-ON P2.4
R236
R235
4K7
4K7
GND
- 15 -
R703
30K
U701 C
14 1
VDD 1A B
Q702
13 2
4B 1B
2SC1923
E
12 3
4A 1Y
11 4
4Y 2A
10 5
3B 2B
R706
C706 9 6
3A 2Y
104K
8 7
3Y GND 15K
C702
R705 R704
R229 74HC86
10K 1K
0R 10u
D701
DAP202K
R212 470R
203
L201
-VP
R228 470R
100uH
5V6
C216 C217
100u
104K
R203
R204
R213
R214
4K7 4K7 4K7
4K7
GND
C222
C223
104K
100u
GND
D903
1 3V3
P2.0
2
P2.1
3
P0.0
FM-SMETER
4
1.7
AM-SMETER
5
P1.6
6
P1.5
7
VSS C219
8
24C08
P3.1 RDS-DATA
0.1U
9
P3.0 U203
GND
10
P1.4
11
P1.3 RDS-CLK
12
P1.2
13
P2.2
14
P2.3
U201
P89LCP936
NOTE: 1. RESISTORS ARE CARBON FILM 5% 1/8W
UNLESS OTHERWISE SPECIFIED.
TITLE:
C426 MCU
2. CERAMIC CAPACITORS ARE 50V 10%
Product Code:
UNLESS OTHERWISE SPECIFIED.
NATNC426+09CSXX
FILE:
SIZE:
Sheet Size
NATNC426(A)
R702
330R
1606
IR_IN
R701
1K5
C701
473J
GND 1
IR-IN 2
GND 3
F1 4
5
DATA-OUT
F2 6
+5V-D 7
STB 8
CLK 9
DIN 10
KEY-B 11
+3V3-SDBY 12
KEY-A 13
14
-VP 15
D210 J202B
1N4148
R202 R288
4K7 100R
C
R991
B
47K
E Q983 M213
D981
C114 TRIGGER_IN
R990 1N4148
R999
5K1
1K
GND
Customer
NAD
REV:
SHEET: 1 OF 3
Revision