NAD C 521BEE Schematic Diagrams page 5

MCU
R301 1K R302 6K2
KEY309
KEY310
F.SCAN
B.SCAN
KEY307
PREV
R303 6K2
VCC
R311
1K
M505AB
LCD
COM0
COM1
COM2
COM3
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
C305 C304
220uF/16V 0.1u
D+5V
R304 2K R306 1K
KEY308 KEY306
KEY304
KEY302
REPEAT TIME RANDOM
OPEN/CLOSE
KEY305 KEY303
NEXT STOP KEY301
PLAY
R305 2K R307 1K
R314
R313
80
R312
22K 79
22K 78
22K 77
76
75
74
73
L302
VCC 72
10uH
71
70
69
68
67
66
65
64
63
62
61
D302
5393
4.2V
VCC
C307
47uF/10V
D411
1N4148
A+12V
D403 C408
3V3
22u/16V
MUTE
VCC
1/2X
R308
SQCK
3K
SCLK
R309
3K
R310
3K
VL1 P43/I1
VL2 P42/INT0
VL3 P41
COM0 P40
COM1 /RESET
COM2 P71/XCIN
COM3 P70/XOUT
AVSS XIN
VREF XOUT
VCC VSS
Trig IN
S0 P27
Trig SW
S1 P26
S2 P25
S3 P24
S4 P23
S5 P22
S6 STANDBY LED P21
Relay
S7 P20
S8 P17/S31
S9 P16/30
SENS
SCLK R327
SCLK
SQCK R326
SQCK
1/2X R325
1/2X
DISCO R323
DISCO
DI/SW R322
DI/SW
R321
R405
22K
C407
A+12V
2200u/16V
R406
7K5
2
Q401
2SA1015
2
Q403
2SA1015
R416 R415
47K 7K5
- 15 -
R340
C309
CD/CDR
10R
47uF/10V
D+5V
UNLD
UNLD
LOAD
LOAD
XRST
XRST
GFS
GFS
XLAT
CLOK
CLOK
XLAT
DATA
DATA
SCOR
SCOR
SYSM
21 RW/ROM/LDOFF
RW/ROM/LDOFF
22
R339
23
24
C303 100K
Q308
25
0.01u
26 C301 2
27 33p
28 8050 D303
X301A
29 8.00M
30 C302 IN4148
31 33p
32 1K R336
33
34 1K R335
35
36
R334
37
38 560R
39
40
VCC
R329 4K7 R341
M301A
560R
R328 4K7
LED1
3
U401
2
M38223E
1
C310
1000uF/10V
4K7
VCC
GREEN
4K7
3
4K7
2
1
4K7
RED
4K7
M301B
4K7
LED1
R403
10K
D409
1N4148
R413
47K
R412 4K7
2
NOTE: 1. RESISTORS, ARE CARBON FILM 5% 1/8W UNLESS
OTHERWISE SPECIFIED.
Q402
2. CERAMIC CAPACITORS, ARE 50V 10%. UNLESS
2SD1012F
OTHERWISE SPECIFIED.
M113
IR
3
VCC
2
GND
DAT
SYSM
D+10V
VCC
C308
10u/6.3V
D306
RL101
R338 IN4148
10K
VCC
R331
1K
2 Q309
8050
2
Q307
8050
STANDBY CNL
GREEN
R330
GND
10K
RED
SQSO
SENS