Onkyo HT-R520

PRINTED CIRCUIT BOARD VIEWS-1
TX-SR502/E/8250/HT-R520 TX-SR502/E/8250/HT-R520
+22V
+22
V
SEC1-1
SE
S
S
SEC1-1
SE
G
G
GND
GN
GN
ND
SEC1-2
SEC1-2
2
SEC
EC3-1
SEC3-2
SEC3 2
2
2
S
E
C3
-2
SEC3-
3-1
56S
5
.
6S
5
PROTHER
PROTH
ERM
+13V
G
GND
G
GND
ND
ROTECT
T
PROTEC
T
T
OC
C
VOLH
H
VOLH
H
VOLH
H
SPB
S
SEC1H
SE
S
SEC
EC
SPCS
SPC
SP
PCS
CS
SPF
PF
SPF
SP
F
R
R
R
POWER
R
ER
WE
N
IN
N
I
N
IN
OU
OUT
O
OU
T
OUT
O
OU
T
IN
IN
G
G
B
B
B
E
E
E
E
E
E
E
E
E
E
GND
G
D
D
RI
R
R
HPIN
P
P
N
N
H
Y
Y
MCRDY
R
RD
DY
C
Y
Y
M
C
MCSDA
M
SD
D
A
C
M
A
MC
CS
M
M
MC
M
MCMDA
M
MD
D
A
M
MC
A
C
M
MC
C
M
C
M
M
M
C
CCLK
C
L
LK
C
K
C
C
C
C
MC
M
M
C
CRST
R
S
ST
T
R
P
PM
HP
H
H
P
MUT
M
U
UT
T
M
-
-
VP
VP
P
V
G
G
GND
G
G
D
D
MCS
C
M
M
CSDA
A
D
A
SD
MCMDA
C
M
A
D
A
MD
MDA
A
D
A
MD
MCC
C
CC
M
K
CLK
CL
K
MPUR
PUR
MPUR
ST
ST
ST
URST
RS
URS
S
T
T
T
FVCC
C
FVCC
FVCC
C
IC
IC
RD
Y
MCRD
D
DY
FLASH
FLASH
LASH
FLASH
GN
GN
GN
GN
ND
ND
D
D
ND
N
ND
ND
D
23
2
23
23
32R
232
2R
32R
RXD
XD
R
RXD
RX
D
23
2
32
23
R
R
RX
R
D
D
D
2
2
2
2
232
232
232
232
TX
T
TX
T
2
2
2
2
2T
2T
2T
XD
TX
XD
D
XD
N
N
N
C
C
C
C
C
C
C
FV
C
C
C
F
C
VC
C
C
C
C
30
NCDG
G-82
CD
8230
0
251
138230B
2
30B
1
1
1
2
2
20
2
20
0
1
2
2
2
2
2
21
1
40
4
0
60
80
8
8
0
1
1
1
10
0
10
10
10
10
11
11
1
20
0
20
1
1
7
7
7
8
8
8
8
8
8
14
4
14
1
1
1
8
8
1
1
1
1
1
1
1
1
1
16
6
16
6
16
16
6
1
6
17
17
17
17
1
1
17
17
17
1
1
32
32
2
32
32
2
32
32
2
32
32
2
32
32
2
1
1
3
3
3
3
36
36
3
72
72
2
72
108
1
08
108
1
108
108
1
08
109
9
9
144
4
44
4
1
18
18
18
C1
C1
C1
81
81
81
82
82
C1
C182
C
C
C183
C183
C183
18
C18
C1
C1
84
184
185
5
C
C
C186
18
C
C
86
7
7
1
1
7
18
18
C
C
70
701
1
C7
7
0
0
0
C702
C702
C70
C7
C703
C707
C
C7
C
0
7
7
7
C708
08
8
C
70
C7
C708
70
08
8
C7
C
C709
C
C709
C
C709
C
C709
C
C709
C710
C710
C710
C710
C711
C711
C711
C711
C71
71
1
C7
C712
12
2
C71
C
C7
71
7
1
71
713
13
13
C7
C7
C7
71
7
C714
4
7
C
71
C
C715
5
C7
C
715
C
C716
6
16
C7
C
71
C720
C72
0
C720
1
C751
C751
2
2
2
C752
C752
C752
401
401
C6
C6
01
C
64
64
C64
403
3
C
C
C
4
4
4
C6404
C6404
6
C
C6
5
4
05
406
6406
C
C64
C64
6
409
409
C
C
C64
C64
9
9
C
C
C6410
C6410
C
1
1
C
C
C641
1
1
1
1
C
C
C6412
C6412
C
412
C
C
C
01
1
C7001
01
C70
C700
C700
01
C
C
C7002
C7
2
3
3
C700
0
C
70
0
C7
C7003
C
70
0
3
C7
70
70
0
C
C
C
7004
004
004
C70
C
C7
C70
C
7004
70
0
70
00
005
05
005
700
005
C70
C70
C7006
C7006
C7006
C7006
C7007
C7007
C7007
C
C7008
C7009
C7009
7009
C7
C7
7010
7010
C
C
7
7
10
0
C7011
7011
012
C7012
C
4
4
C7
70
014
7014
C
15
5
C70
C70
5
C70
C7
015
70
C7301
C73
730
C7
C7302
C7302
C7302
C7303
7303
C7303
C
C7304
04
C7305
305
05
30
5
7
C7306
06
C7
6
C7307
C73
C73
C73
307
307
307
3
3
3
C9501
C
9501
C9502C9502
C9503C9503
C
5
50
C95
95
505
C95
9505
C
C9506
6
9506
C
C9506
C
C9506
C
950
07
C
C95
C950
7
C9508
C9508
C
C9508
C
C9508
08
51
C95
10
9510
510
C95
95
951
C95
11
511
C95
12
C9
C
2
2
95
51
D70
D
0
00
00
0
0
01
0
0
1
001
00
0
0
1
D7
D
700
00
0
01
0
1
D7002
002
02
700
3
3
3
D700
700
00
03
03
03
D
004
0
00
0
04
0
4
4
004
0
00
4
4
D700
D
00
D7
0
7
7
7
02
02
02
D77
D77
D77
502
D9
02
50
D
9
503
D9
9
50
4
D
D9
9
50
5
D
6
6
D9506
D9
9507
D
D9
D9
D9508
9
L181
L181
81
L7
701
L7
L
L702
2
0
L7
7
L703
L
03
3
0
L751
L
L
5
5
1
7
001
1
001
0
L70
L
L
L7002
L7
7002
7002
L7
L7
L7301
L7301
P410B
0B
41
10
P
P
B
P411
B
2B
2B
P4
P
412
2
B
B
B
03
P6403
P7701
P7701
P7701
P7
P7701
P7701
P7701
P7
P
7
P
P
7502B
502B
7502B
2B
50
50
B
B
02B
02
P75
75
P75
P
Q181
8
Q1
Q181
8
Q1
Q181
8
1
Q
Q
181
1
Q
70
1
Q701
701
Q
Q
7
70
Q702
2
0
Q
Q702
2
0
702
2
0
Q
Q702
2
0
Q
Q702
2
0
2
2
0
Q702
0
2
7
Q
Q
0
2
2
Q702
0
2
7
Q
Q
0
Q702
0
7
Q
Q
02
402
Q6
640
0
0
Q
Q
Q640
Q640
03
03
Q
Q
Q
Q6405
Q
Q64
Q6406
07
Q6407
6407
Q6
Q6408
6408
Q6
Q6
Q7001
001
01
700
Q70
Q
Q7002
Q7002
Q7002
Q7002
70
Q
Q7
00
02
2
7003
3
7003
Q7
Q7
Q
Q
7
7
Q7003
Q7003
Q7003
Q7004
Q700
04
Q
Q7008
Q7008
08
00
0
0
Q7
Q
7
Q
Q
Q700
0
70
Q
7
008
08
00
8
Q7301
Q
Q7301
7301
301
3
301
0
Q73
Q
Q73
Q73
301
01
30
Q
950
1
R
R1
81
81
R18
R181
1
82
8
2
2
82
R1
R1
R183
8
R
3
1
R
R
R
183
83
8
R1
R
R1
183
83
1
3
1
R184
R
R
18
5
R
86
86
6
R18
1
8
8
R1
R
1
R
86
8
86
R18
R1
1
R
R
R
R187
R187
7
7
R7
7
R7
702
702
R
02
R7
R7
70
R7
703
R7
7
7
70
R
03
R
R7
R
R
R7
7
0
4
R7
705
5
R
7
70
05
R
R7
R
R
R7
7
06
R707
R
R7
R
0
7
7
7
R708
R7
08
8
R
R70
R709
R
09
70
9
R7
R
R
R
R
R710
R
R
R711
71
1
R
R7
R712
R
R
R713
R
R7
R
13
3
71
R7
71
R7
7
7
71
R
R
714
R71
R7
715
R
R
R
R716
R
R
R
R7
R
R
R717
R7
7
R
7
7
R
7
1
8
R719
R
R
R72
20
2
R
7
R72
21
2
R
7
R722
R7
722
R7
R722
72
R723
23
R724
72
4
24
R
R725
R7
25
725
R72
R726
R
726
R72
R7
R727
7
R
R
R728
7
R
R
R729
7
R
29
R
R730
0
7
R
73
R
R731
1
7
R
73
R
R732
73
R
2
R732
R733
7
33
3
R73
R734
7
3
4
R73
R735
7
35
5
R73
R736
73
R
6
R736
R761
76
R7
1
R
R761
6
7
1
R
R761
1
76
R7
61
R
R762
6
7
R
7
R
R763
63
3
R76
R763
4
4
4
R764
R764
R764
R6402
R640
R6402
R
3
3
3
03
3
R6403
405
R6405
R6406
06
R64
06
407
R64
6408
40
8
08
64
R6
R
R
R
R
R
00
00
0
0
0
7000
R700
7000
R
R
R
R
R
R70
0
70
0
R7
R
7001
00
0
0
1
R
R7002
2
7
R
R
7002
00
0
0
2
R7003
003
3
70
R
R
R700
0
00
R
R7
R7003
00
3
70
R
R
R7004
4
7
R
R
7004
00
0
0
4
R
R7005
5
7
R
R
7005
00
0
0
5
R
R7008
8
7
R
R
7008
00
0
0
8
R
R7009
9
7
R
R
7009
00
0
0
9
R
R7010
0
7
R
R
7010
01
1
0
0
R
R7011
1
7
R
R
7011
01
1
0
1
R
R7012
2
7
R
R
7012
01
1
0
2
R
R7014
4
7
R
R
7014
01
1
0
4
R
R7015
5
7
R
R
7015
01
1
0
5
R
R70
0
7
R
R
7016
016
16
0
6
R
R
R701
01
70
R
R
17
7
17
R70
R701
018
R7033
R7
3
70
033
033
03
70
3
3
7033
3
33
703
R7
R
R7
R
7
0
4
6
R7047
R7047
R7047
R7047
R7048
48
8
R
R
048
R7
704
R7049
49
704
049
R70
R
R7050
050
705
R7
R70
R
R
R
R7051
7051
R70
R7
R
R
R7052
R7052
R7053
R
R7053
R7054
R7054
R
R7
R7055
R7
70
055
R
R7056
6
R7056
7056
R70
R70
R
70
R
R7057
R
7057
R7
R70
7
R
R7
R7
R7
705
70
5
70
58
8
5
R7
R
7
R7
705
05
70
7
59
59
R
R
R70
0
7
R7
R
R
706
0
7
60
0
1
R
R7061
R706
R7062
R7
R7063
R
R7
06
R70
64
6
4
64
R7064
R7
R70
706
4
06
065
R70
06
65
0
R70
065
R706
65
5
6
R7066
6
R
R
70
0
0
67
6
06
06
R7
7
R
R
R
7068
68
068
R
7
R
R
R
R
706
6
6
R7
R7
R
069
6
9
69
R
R
70
R7
R
070
7
0
70
71
71
71
1
1
1
1
1
1
R707
R
R7
707
07
07
R7
R70
R7
72
7
2
73
73
R7073
7
0
3
3
3
4
R7074
7
0
4
75
R707
R7
5
R7076
76
70
R
R7
R7077
R
7
R7
70
07
R7077
77
R
7
0
R7077
R
77
R7
70
07
7
7
R7077
7
R
R7
70
R7078
7
8
7
R
0
R7078
707
78
8
R7
R
R70
R7078
07
78
8
R7
R
70
R7079
70
R7
R
7
9
R7079
R70
R7
R
9
707
79
R7080
70
08
0
R7
80
R7080
R7
70
0
R
8
R7080
7
0
0
R
80
R7080
70
08
R7
0
R7081
8
0
70
R7081
8
0
70
R7081
8
0
70
R7082
8
0
70
2
R7082
8
70
R70
R7082
8
0
70
7
R
3
083
3
R
R
70
7
0
7
R
4
084
4
R
R
4
4
70
7
0
R7
R
5
085
5
R
R
70
7
0
78
7
78
8
R717
R7
R71
71
7
R
R7178
R7
71
17
7
8
R
R7179
R
9
717
R7
R71
79
R7179
R
7
R7
71
9
R7180
80
R
R7
718
R71
0
R
R
7
R7
R7
311
R
R
7
312
2
R7
R
3
3
13
1
3
313
3
31
3
13
R73
3
73
7
R7
7
R7
R
R
R
R7
R
731
3
3
7
R73
7
7
13
3
313
3
31
3
3
R7314
4
3
7
1
R
R7314
4
R
31
73
4
R7
R
R
R7314
4
3
7
14
R
R7314
R
1
73
4
R7
R7315
R
73
5
1
5
3
R7315
R7
73
5
1
5
3
R7315
R
73
5
1
5
3
R
R
7315
73
5
1
5
3
316
6
31
R73
R7
R
R
16
16
6
6
R7
R7
16
16
1
3
3
R731
R7317
R7317
R731
R731
R731
R7318
R7318
R7318
R7318
R731
R731
R731
95
506
6
R9
95
R9507
R
R
R9508
R
R95
8
09
0
R
R9
9
9509
509
9
R
X181
81
X7001
X70
001
X7
01
1
1
2
25
25
26
2
2
6
6
6
2
2
26
2
26
50
0
R64
6421
R
6
422
C6
421
C7020
0
C7020
20
C7020
0
C702
7
7
C
C
0
21
401
P6401
01
R6
R6
R6411
6411
R6411
R
R
D95
D9513
D9
C
C95
C
C
1
5
5
95
95
516
516
C9
C9
C9513
C95
C
3
C951
C
95
C
14
19
9
9
1
R731
73
1
R73
3
R731
73
R7319
7
19
02
02
02
0
L
L
2
2
2
L730
L730
L730
L730
A
1
2
3
4
5
BCDEFGH
U01
PREAMPLIFIER PC BOARD
(NADG-8230)
Component side