Circuit Diagrams - NAD D3020 Service Manual

CIRCUIT DIAGRAMS

1.PREAMP VM2.1(1/3)
PRE_DAC_Vm1.1
J105
To o/p board J305
VCL+ 31 32 VCL-
-12V 29 30 +12V
-7VA 27 28 +7VA
5VS 25 26
3V3D 23 24
ANA_DET 21 22 OPTO_DET
DCERR- 19 20 nAMPON
PSUF 17 18
AGND 15 16
13 14 AGND
11 12
9 10
7 8
5 6
3 4
1 2
DA_RST
DA_RST
DA_INT
DA_INT
DA_CS
DA_CS
DA_MISO
DA_MISO
DA_MOSI
DA_MOSI
DA_CLK
DA_CLK
SP_SEL
SP_SEL
IIS_SEL
IIS_SEL
U301
USB_DO 1
USB_DO I1 S
2
AGND GND VCC
BT_DO 3
BT_DO I0 Q
NC7SV157
U304
USB_BCK 1
USB_BCK I1 S
2
AGND GND VCC
BT_BCK 3
BT_BCK I0 Q
NC7SV157
U306
USB_FS 1
USB_FS I1 S
2
AGND GND VCC
BT_FS 3
BT_FS I0 Q
NC7SV157
U309
NC7SV157
USB_MCLKO 1
USB_MCLKO I1 S
2
AGND GND VCC
R349
3
AGND I0 Q
0R
SAIFS
SAIFS
C357
2 INPUT1 6 4
J110 T300
2
AGND 100n X7R
COAXIAL INPUT
SPDIF 1:1
C362
1 3
1nF
AGND
J112
R364
1
VCC 4R7
3
DATA
2
GND
GP1FRX
C379
100n
AGND
+7VA
100U/10V
C386
C390
100N
AGND AGND
C393
C395
100U/10V
100N
-7VA
RCA_L
PHI_L
DALO
U314
NJW1194
DARO
PHI_R
RCA_R
-7VA
AGND
Vol R
HP_DET
HP_DET
5VD
D312
BAT54S
Q318 AGND
DTA114
C458
100U/10V
AGND D316
1SS352
AMP_EN
AMP_EN
HP_MUTE
HP_MUTE
+12V
C483
100N
U321C
AGND
TL082 C486
220P
C481
100N
R458
-12V
AGND 22K
U321A C482 U321B
3 100nF.63V 6 SUB OUTa
R463 R460 R459
1 7
2 5
100 11K 11K
C484
TL082 TL082 AGND
220nF,63V
SP_DATA
R319
47K
U302
6 1 6
R323
I1 S
47K
C326 AGND
5 2 5
GND VCC
R310D
R311 R310C
4 3 4 100N 8 7
I0 Q 100R
47R
6 5
100R
NC7SV157 4 3
100R
C320 2 1
AGND 100R
100N U305
R310B
6 1 6
I1 S
R310A
5 C330 2 5 C337
GND VCC AGND
100N 100N 64
R316 CX_SDIN2
4 3 4 R336 63
47R I0 Q 47R CX_SDIN3
R442 62
47R CX_SDIN4
NC7SV157 R443 61
R444 47R SAI_SCLK
60
SAI_LRCK
U319 59
47R OMCK
6 1 6 C335 58
I1 S ADCIN1
AGND C463 100N 57
ADCIN2
5 C338 2 5 R331 56
GND VCC 10K CX_SDOUT
100N R332 55
10K RMCK
4 R334 3 4 100N R445 54
47R I0 Q 47R SAI_SDOUT
C340 53
3V3DA VLS
NC7SV157 100N 52
AGND DGND
AGND 51
5VDA VD
U320 50
TXP
C344 C346 C347 3 4 49
gnd y RXP0
6 2
a
10N 22U/6.3V 4U7 1 5
/oe vcc
5
AGND AGND AGND 3V3DA
R350 SN74AHC1G125DCK
4
C473
47R
100N
R324
C353 C354
AGND AGND
100R
C356 100N
RX0 C359
100N
10N C360
C361
AGND
100N
100N
100N
L303
5VDA
742792662
C370
3V3DA
C371 100U/6V3
AGND
RX1 C374
33R
R369 R370
10N 22N
1k37
C378
For layout refer CS42528 datasheet p80
4U7
AGND
+12V
-7VA
C464
+7VA
100N
AGND
C465
100N
Vol L Vol R -12V
R434
1MEG
Q312
Vol L
Q313
MMBF4391LT1G
1MEG
R438
AGND
1K
R427
C456
+12V 1N
AGND
Q316
D313 D314 D319
R429
R428
C457
BAT54S
47K 10K
470U/10V
1SS352 1SS352
Q317
DTC114EKA
DTA114
C460
C461 Q319
100U/25V
DTC114EKA
470U/25V
AGND
AGND
DM03 BAS316
RM06
470K
UM01B CM04
RM05
DM04
10K
1uF
Comment: BAS316 -12V
RM08
TL082D AGND
0
AUDIO_DET
RM07
QM01 1K RM09
DM05
2SC1815 +12V
RM04 CM05 BAS316
0
330K 22uF/16V
AGND
NAD Audio sense Vp1.0
3V3DA 5VDA 5VDA 5VDA 5VA 5VA
C525
47UF
C300 C301 C302 C303 C304
10N 10N 10N 100N 10N
AGND AGND AGND AGND AGND AGND
3V3DA 3V3DA 3V3DA 5VDA 5VA 5VA DAL_N
C307 AGND
C309 C310 C311 C312 C313 C314
R302
100N 10N 100N 100N 100N 100N 2.2U X5R C315
R305
AGND AGND AGND AGND AGND AGND 1N NPO
10K
AGND C319
10K
3V3DA
5VDA 100N
AGND
C322 C323 C324
U303
* 1N 100N Comment: 100U/6V3
AGND
C329
C331 C332 C333 1N NPO
17
VQ
18 1N 100N
FILT+ 100U/6V3
19 DAL_P
REFGND AGND AGND
20 R322 DAR_N
AOUTB4- 750
21 R325 DAR_P
AOUTB4+ 750
22 R326
AOUTA4+ 750
23 R328
AOUTA4- 750
24 DAR_N
VA 5VA
25
AGND AGND
26 R333
AOUTB3- 750
27 R335
AOUTB3+ 750
28 R337
AOUTA3+ 750
29 R339 C341
AOUTA3- 750
30 R340 1N NPO
AOUTB2-
750
31 R341
AOUTB2+
750
32
R346
AOUTA2+
750
AGND
C355
R354
750
1N NPO
R355
750
R356
750
DAL_P
R357
750
DAL_N DAL_N DAR_P
R360
750
+12V
C367 C368
Q302
100N
10N DTA114 D302
R366
C375
4K7
1SS352
1N NPO R371
Q305
100k
DTC114EKA
AGND
-12V
3
U310A
R374 R375
1
100R 100R
R377 2
D304 D305
R378 R379
Q306
NE5532
4k7 4k7
2SC3326
R380
3K32
1SS352 1SS352
R432
634R
U310C AGND AGND AGND
R433
634R
NE5532
R382 D306 D307
R383 R384
3K32
R385 AGND Q308
4k7 4k7
6 2SC3326
U310B
R386 R387
7 1SS352 1SS352
100R 100R
5
NE5532
R389
-12V
100K
U311A
C492
3
LME49860MA
R455 330N
MMBF4391LT1G 1
22K
2
C404 C405
C491
R394 R395
IN1+
3K32 33R
150N 150N VCL+
R399 R398 47U/16V
3K32 2K21
C417 +12V
R401
1uF SUB OUTa SUB OUTa
68K
R402 AGND
68K
C420
R403 R404 C493
1uF
3K32 2K21 VCL- 330N
U311C
R388
LME49860MA
1K
C490
R410 R411
IN2+
3K32 33R
C428 C429
R391
150N 150N 6
R456
47U/16V
7
22K
5
U311B
-12V
LME49860MA
nAMPON
Q314
DTC114EKA
AGND
+12V
Q315
DTA114
D315
R430
1K
R431 1SS352
C459
1N
AGND
-12V
12
DM01
BAS316
DM02
BAS316
CM03
270pF
RM03
220K
R390 100N
C479
47K
CM06 R413 100N
C478
47K
0.1uF R451 100N
C477
47K
R452 100N
C476
47K
R453 100N
C475
47K
AGND R454 100N
C474
47K
UM01A
TL082D
AGND
CM08
CM07
47uF
0.1uF
AGND
C496
47U/16V
UES1C330MEM
C306
R300 R301
499R 1K74
47U/16V
C308
1N
U300A
R303
2 C316
NE5532
499R
1 DALO
549
C318 3
R307
10N 330N
R309
2K21
C321
C325 1nF NPO
33P
+12V AGND
2K21
C327
R312 R313
10N
499R
6 C387
7 100N U300C
AGND
C334
5 U300B C391 NE5532
AGND
1N
NE5532 100N
R317 R318
499R 1K74
-12V
UES1C330MEM
C336
R329 R330
499R 1K74
47U/16V
C339
1N
U307A
R338
2 NE5532 C342
499R
1 DARO
549
C343
3
R345
10N 330N
R347
2K21
C345
C349 1nF NPO
33P +12V
AGND
2K21
C350
R352 R353
10N
C471
499R
6 U307C
100N
AGND
7 NE5532
C470
C358 5
U307B 100N
AGND
1N
NE5532
R358 R359
499R 1K74
-12V
L301 L302
5VD 5VDA 3V3D 3V3DA
742792662
742792662
AGND AGND C366
22U 6V3 X5R
D303
R367
Q303 Q304 AGND AGND AGND
4K7
2SC3326 2SC3326
1SS352
DALO
DARO
Q307
2SC3326 J113 CON301
HP_DET
1 1
AGND 2 2
5
3 3
Q309 4
AGND 4 4
C392
2SC3326 3
5 5
NC
2
TO HP FROM MAIN 1
C489 C396
C487 C488
100pF NC
1nF 100pF
AGND AGND AGND AGND
Headphone board
Q310
DTA114
BASS_EN
BASS_EN
Q311
DTC114EKA
AGND
AGND
AGND
VCL+
VCL+
VCL-
VCL-
+12V
+12V
-12V
-12V
3V3S
3V3S
3V3D
3V3D
5VA
5VA
U313 5VD
5VA
AMS1117-5.0 5VD
10R +12V 5VS
R392 5VS
IN1+
IN1+
IN2+
IN2+
+7VA
C412
C413
C414 +7VA
100U/25V
100nZ 5VA 100nZ -7VA
-7VA
PSUF
AGND
PSUF
DCERR-
DCERR-
J302
11 8
10 7
9 6
CKX-3.5-02AF
3V3S
STBY
Q320
DTA114
R396
200
AGND
5VS
J109
To PSU board