Onkyo TX-SR503 Service Manual page 15

A
SCHEMATIC DIAGRAMS-2
DSP SECTION
1
2
3
TO NAAF-8523
4
5
U02
DSP PC BOARD
NADG-8514
B
TO NADIS-8513
10 PROTECT
9 THERMAL
8 VOLH
7 SEC1H
6 APOWER
5 HPDET
4 VPOWER
3 FAC1
2 FAC2
1 -VP
P311A
20 +5VDIS
19
18 POFFV
17 +10S
16
VIDEO+5V/
15
SW+12V
14 VIDEO-5V
13 GNDV
12 +12VTRG
11 +5VDSP
10 +3.3V
9 +2.5V
8 GNDDG
7
6 ADLT+
5 ADLT-
4
3
2
1 ADRT+
ADRT-
P302A Z2MUT
AMUT
10 SBZ2MUT
9 GND+12V
8 -12VA
7 +12VA
6 GND+7
5 +7V
4 -7V
C526
3 DAC_SR
+
C525
2 DAC_SL
+
C523
1 DAC_CT
+
P301A
C524 10/50
20 DAC_SW
+
19 DAC_SBL
18 DAC_FL
17 DAC_FR
16 DAC_SBR
15 FSWSDO
14 FSWCLK
13 GNDDG
12 FSWSTB
11 VOLSTB
10 VOLCLK
9 VOLDAT
8 MICOUT
7 GNDMIC
6 V4_R
5 V4_L
4 GNDV4A
3 TU_R
2 TU_L
1 GNDTU
P303A
4
3
2
1
E301
7
Q503:A
NC
NC
Q503:B
1
C
TO TUNER UNIT
P702A
29P
+
C531 220/16
+
C532 220/16
10/50 0 R596
10/50 0 R595
10/50 0 R593
0 R594
0 R597
0 R591
0 R592
0 R598
NC
P401A
NC
1
JL402B
2
1 3
2 4
3 5
4 6
5 7
6 8
7 9
Q502:A
R562 R512
NC
NC
NC
R532 R522 R502
6 6 6
7 7 NC
NC NC
5 5 5
Q501:A
NC
NC
Q502:B
Q501:B
3 3 NC 3
1 1
NC
2 2 2
R521 R501
R531
NC NC NC
R561 NC R511
TX-SR503/503E/8350
D
NC
P101A
NC
R691
0
+12VA
-12VA
Refer to following table about the parts displayed b
CIRCUIT NO.
DESTINATION
MDD, MDC
MGR, GQ, GK
MPA
MWT
MPP
POFFV
+12VTRG
Q111 BU1924FS
C111
+
100/16
9
8
T2 CMP
10
7
T1 VSS3
11
6
VSS2 VSS1
C116 12
5
VDD2 VDD1
330J 13
4
XI MUX
14
C117 3
XO Vref
330J
15
2
NC RDATA
16
1
RCLK QUAL
R113
MPP Only
CIRCUIT NO. R111, 112,
113
DESTINATION
MPP 220K
Except MPP 000J
R478
R438 R418
180
6
7 470 3.3K
R468
5
180
R428 R408
470 3.3K
Q404:A
R467
NJM4580M-D
180 R427 R407
3
1
3.3K
470
R477
2
180
R437 R417
Q404:B 470 3.3K
NJM4580M-D
R436 R416
R476 470 3.3K
6
7
180
R466
5
180 R426 R406
470 3.3K
Q403:A
R425 R405
NJM4580M-D
R465 470 3.3K
3
1
180
R475
2
180 R435 R415
Q403:B 470 3.3K
NJM4580M-D
R434 R414
6
R474 470 3.3K
7 180
R464
5
R424
180 R404
470 3.3K
Q402:A
NJM4580M-D R423 R403
470 3.3K
3
1 R463
180
2
R473
R433 R413
180
3.3K
470
Q402:B
NJM4580M-D
Q401:A
NJM4580M-D
R432
R472 R412
180
470 3.3K
6
7
R462
5
180 R422 R402
470 3.3K
Q401:B R421 R401
NJM4580M-D R461 470 3.3K
3
1
180
2
R471 R431 R411
180 3.3K
470
TO NAVD-853
CIRCUIT NO.
R69
DESTINATION
MDD, MDC YES
Except MDD, MDC NO
R686 R687 R688 R
56K 4.7K 10K 3
10K 4.7K 10K 1
10K 4.7K 10K 1
10K 4.7K 10K 1
10K 10K 56K 1
L111
022M
C115 561J
C113 104Z
R114 1K
+
C114
2.2/100
R112
R111
C303
104Z
C304 47/25
+
C305 NC
17
VQ
18
FLT+
+
19
REFGND
C306
20
AOUTB4-
100/16
21
AOUTB4+
22
AOUTA4+
23
AOUTA4-
C307
24
VA
NC 25
CS
AGND1
26
AOUTB3-
27
AOUTB3+
28
AO
AOUTA3+
29
AO
AOUTA3-
30
AOUTB2-
31
32
C308
+
220/6.3