Denon AVR-1905 Service Manual
SCHEMATIC DIAGRAMS (1/13)
INPUT/VOLUME UNIT
(For ALL MODEL)
(For ALL MODEL)
SCHEMATIC DIAGRAMS (1/13) INPUT / VOLUME BOARD
1
2
3
4
5
6
7
8
9
10
11
A
B
C
D
E
F
G
H
AVR-1905/785 AVC-1590
R
7
9
5
4
7
0
4
N
7
(E
B
)
C
7
2
6
1
0
0
N
(E
B
)
C
7
3
0
R
7
6
1
S
R
1
0
0
R
7
6
1
S
B
L
1
0
0
C
3
1
0
N
-K
470
R706R
470
R706L
470
R705R
470
R705L
470
R704R
470
R704L
470
R703R
470
R703L
470
R702R
470
R702L
470
R701R
470
R701L
2
M
2
R
7
1
8
R
2
M
2
R
7
1
7
L
2
M
2
R
7
1
6
L
2
M
2
R
7
1
5
L
2
M
2
R
7
1
4
L
2
M
2
R
7
1
3
L
2
M
2
R
7
1
2
L
2
M
2
R
7
1
1
R
2
M
2
R
7
1
1
L
100
R761ZR
10/50
C753ZR
KDS160
D752
KDS160
D751
R
7
5
9
Z
L
1
0
0
4
.7
/5
0
C
7
5
0
Z
L
1
0
0
P
-J
C
7
9
5
10/50
C796
200K
R756ZL
C
7
9
3
1
0
0
P
-J
10/50
C797
10N-K
C756
100
R761ZL
C755
10N-K
1
0
/5
0
C
7
5
1
Z
L
10N-K
C754
4
.7
/5
0
C
7
5
0
Z
R
R
7
6
2
Z
L
1
0
0
K
1
0
0
K
R
7
2
3
R
1
0
0
R
7
2
4
R
1
0
0
K
R
7
2
3
L
1
0
0
R
7
2
4
L
10/50
C713L
100
R728R
1
0
0
K
R
7
2
9
R
1
0
0
K
R
7
2
9
L
4
7
N
-Z
C
7
6
1
S
W
C
7
6
1
F
R
4
7
N
-Z
C
7
6
1
F
L
4
7
N
-Z
Z
D
7
0
1
M
T
Z
J7
.5
A
2
S
K
1
1
7
Y
Q
7
7
4
R
7
6
4
F
R
4
K
3
R763FL
15K
4
K
3
R
7
6
4
F
L
R
7
3
3
4
K
7
C
7
2
3
4
7
/2
5
Z
D
7
0
2
M
T
Z
J7
.5
A
C
7
2
2
4
7
N
C
7
6
3
F
R
4
7
N
-Z
C
7
6
3
F
L
4
7
N
-Z
1
0
K
R
7
7
4
R
7
3
2
2
2
0
(1
)
R766SW
100
C765SW
10/50
R766FL
100
R
7
6
7
F
R
1
0
0
K
C765FL
10/50
R
7
6
7
F
L
1
0
0
K
100P-J
C742
100P-J
C741
4
7
/2
5
C
7
9
1
C
7
8
1
S
W
4
7
N
-Z
C
7
9
2
4
7
/2
5
R
7
9
2
1
0
0
(1
)
C
7
8
1
S
B
L
4
7
N
-Z
100
R782SW
C
7
8
1
C
4
7
N
-Z
C
7
8
1
S
L
4
7
N
-Z
C
7
8
1
F
R
4
7
N
-Z
4
7
N
-Z
C
7
8
1
F
L
100
R782C
100
R782SR
100
R782FL
R
7
8
6
S
B
R
2
K
2
R
7
8
6
C
2
K
2
R
7
8
6
S
R
2
K
2
R
7
8
6
S
L
2
K
2
R
7
8
7
S
W
1
0
0
K
C
2
1
0
N
-K
C
1
1
0
N
-K
470
R708L
470
R708R
470
R707L
470
R707R
2
M
2
R
7
1
8
L
2
M
2
R
7
1
6
R
2
M
2
R
7
1
7
R
2
M
2
R
7
1
4
R
2
M
2
R
7
1
5
R
2
M
2
R
7
1
2
R
2
M
2
R
7
1
3
R
K
D
S
1
6
0
D
7
5
3
1
0
K
R
7
5
5
2SK117Y
Q753
2SK117Y
Q754
1
0
0
R
7
5
4
Z
L
1
0
0
R
7
5
7
Z
L
R
7
9
3
4
7
0
100
R759ZR
R754
2K2
200K
R755ZL
1
0
/5
0
C
7
5
1
Z
R
R
7
5
4
Z
R
1
0
0
R
7
9
4
4
7
0
10/50
C713R
100
R728L
R763FR
15K
4
N
7
(E
B
)
C
7
2
5
1
0
0
N
(E
B
)
C
7
2
7
1
0
0
N
(E
B
)
C
7
2
8
1
0
0
N
(E
B
)
C
7
2
9
C
7
6
3
S
W
4
7
N
-Z
R
7
7
3
2
K
2
R766FR
100
R
7
7
1
1
0
0
(1
)
1
0
/5
0
C
7
3
3
C765FR
10/50
R
7
6
1
C
1
0
0
R
7
6
1
S
L
1
0
0
R
7
6
1
S
B
R
1
0
0
100P-J
C743
4
7
0
R
7
4
1
4
7
0
R
7
4
3
C
7
8
1
S
B
R
4
7
N
-Z
C
7
8
1
S
R
4
7
N
-Z
R
7
8
6
S
W
6
2
0
100
R782SBL
100
R782SBR
100
R782SL
100
R782FR
R
7
8
6
S
B
L
2
K
2
R
7
8
6
F
L
1
K
3
R
7
8
6
F
R
1
K
3
J702
8K2
R765SW
6K8
R762SW
100P-J
C762SW
R762FL
4K7
R765FL
15K
C764FL
33P-J
C762FL
100P-J
J701
100P-J
C752ZR
10N-K
C757
+
-
8
7
6
5
NJM2068(2/2)
IC705B
C
7
0
8
R
1
0
0
P
-J
C
7
0
7
L
1
0
0
P
-J
K
D
S
1
6
0
D
2
K
D
S
1
6
0
D
1
C
7
0
6
L
1
0
0
P
-J
C
7
0
5
L
1
0
0
P
-J
C
7
0
4
L
1
0
0
P
-J
C
7
0
3
L
1
0
0
P
-J
C
7
0
2
L
1
0
0
P
-J
C
7
0
1
R
1
0
0
P
-J
C
7
0
1
L
1
0
0
P
-J
9
8
7
6
5
4
3
2
1
CN703
R753
47(1/4)
100P-J
C752ZL
R760ZL
510
10/50
C753ZL
100K
R758ZR
100K
R758ZL
+
-
4
3
2
1
IC704A
NJM2068(1/2)
200K
R756ZR
1
0
0
K
R
7
2
2
R
1
0
0
P
-J
C
7
9
4
1
0
0
K
R
7
2
2
L
3
K
6
R
7
6
1
F
R
3
K
6
R
7
6
1
F
L
C716R
10/50
1
0
N
-K
C
7
1
1
R
3
9
K
R
7
2
5
R
39K
R727R
39K
R726R
68N(EB)
C714R
C
7
1
5
R
6
8
N
(E
B
)
1
0
N
-K
C
7
1
1
L
3
9
K
R
7
2
5
L
39K
R727L
C
7
1
5
L
6
8
N
(E
B
)
R763SW
5K6
+
-
4
3
2
1
IC763A
NJM2068(2/2)
2
S
K
1
1
7
Y
Q
7
7
3
1N4148WS
D772
C764FR
33P-J
C762FR
100P-J
R762FR
4K7
R765FR
15K
10/50
C732
R
7
3
4
4
K
7
4
7
/2
5
C
7
2
1
4
7
N
C
7
2
4
2
2
0
(1
)
R
7
3
1
KRA102M
Q772
C
7
7
3
1
/5
0
C736
10/50
R
7
8
3
S
B
L
4
7
K
R784SW
15K
100P-J
C783SW
R
7
8
3
S
W
4
7
K
4.7/50
C782SW
R
7
8
3
C
4
7
K
4.7/50
C782C
10/50
C782SR
R
7
8
3
S
L
4
7
K
R
7
8
3
F
R
4
7
K
R
7
8
3
F
L
4
7
K
10/50
C782FL
1
0
0
(1
)
R
7
9
1
470
R788SBR
470
R788C
470
R788SR
470
R788SL
470
R788FL
R
L
Y
7
0
1
C
7
0
8
L
1
0
0
P
-J
R760ZR
510
R
7
6
2
Z
R
1
0
0
K
Q
7
5
1
K
R
C
1
0
4
M
Q
7
5
2
K
R
A
1
0
2
M
1
/5
0
C
7
5
8
C
7
0
6
R
1
0
0
P
-J
C
7
0
7
R
1
0
0
P
-J
C
7
0
4
R
1
0
0
P
-J
C
7
0
5
R
1
0
0
P
-J
K
D
S
1
6
0
D
4
K
D
S
1
6
0
D
3
C
7
0
2
R
1
0
0
P
-J
C
7
0
3
R
1
0
0
P
-J
K
D
S
1
6
0
D
5
K
D
S
1
6
0
D
6
1
0
0
R
7
5
7
Z
R
+
-
8
7
6
5
IC704B
NJM2068(2/2)
200K
R755ZR
3
K
9
R
7
6
1
S
W
+
-
8
7
6
5
IC721B
NJM2068(2/2)
C716L
10/50
+
-
4
3
2
1
IC721A
NJM2068(1/2)
39K
R726L
68N(EB)
C714L
D771
1N4148WS
+
-
8
7
6
5
IC761B
NJM2068(1/2)
10/50
C731
R
7
6
7
S
W
1
0
0
K
4
7
/2
5
C
7
7
1
1
0
0
(1
)
R
7
7
2
C
7
7
2
4
7
/2
5
C735
10/50
C734
10/50
4
7
0
R
7
4
2
R
7
8
3
S
B
R
4
7
K
4.7/50
C782SBL
4.7/50
C782SBR
10/50
C782SL
R
7
8
3
S
R
4
7
K
10/50
C782FR
470
R788SBL
1K
R788SW
C786SW
4.7/50
470
R788FR
+
-
4
3
2
1
IC705A
NJM2068(1/2)
13
GND
11
10
8
7
5
4
2
1
VSS
16
STB
18
19
21
22
24
25
27
28
VDD
12
14
CLK
6
9
3
17
15
DATA
23
20
26
IC703
TC9273-004
+
-
4
3
2
1
IC761A
NJM2068(1/2)
Q771
KRC104M
1
4
1
3
1
2
1
1
1
0
9
8
7
6
5
4
3
2
1
C
N
5
5
1
47P-J
C764SW
39P-J
C783SBR
R784SBR
12K
39P-J
C783SBL
R784SBL
12K
56P-J
C783FL
R784FL
6K8
19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
CN701
9
8
7
6
5
4
3
2
1
CN704
39P-J
C783C
+
-
4
3
2
1
IC783A
NJM2068(1/2)
NJM2068(1/2)
39P-J
C783SR
R784SR
12K
+
-
8
7
6
5
NJM2068(2/2)
IC782B
R784SL
12K
56P-J
C783FR
R784FR
6K8
KRC104M
Q755
+
-
8
7
6
5
IC762B
NJM2068(2/2)
+
-
4
3
2
1
IC784A
NJM2068(1/2)
R784C
12K
+
-
8
7
6
5
NJM2068(2/2)
IC783B
39P-J
C783SL
+
-
4
3
2
1
NJM2068(1/2)
IC782A
+
-
8
7
6
5
NJM2068(2/2)
IC781B
1
IN
1
2
A
G
N
D
1
3
IN
2
4
A
G
N
D
2
5
V
E
E
6
A
G
N
D
3
7
V
C
C
8
C
L
9
D
A
10
M
U
T
E
11
D
G
N
D
12
S
E
L
13
O
U
T
2
14
O
U
T
1
IC
7
0
2
B
D
3
8
1
2
F
+
-
8
7
6
5
IC763B
NJM2068(2/2)
+
-
4
3
2
1
IC762A
NJM2068(2/2)
+
-
8
7
6
5
NJM2068(2/2)
IC784B
+
-
4
3
2
1
NJM2068(1/2)
IC781A
19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
CN702
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
IN21(L)
IN22(R)
IN12(R)
IN11(L)
ROUT32(R)
ROUT31(L)
ROUT22(R)
ROUT21(L)
ROUT12(R)
ROUT11(L)
AGND10
GOUT2(R)
VIN2(R)
AGND9
GOUT1(L)
O
U
T
1
(L
)
O
U
T
2
(R
)
VIN1(L)
V
IN
S
R
G
O
U
T
S
R
A
G
N
D
4
D
G
N
D
D
A
T
A
C
L
O
C
K
M
U
T
E
A
G
N
D
5
V
E
E
A
G
N
D
6
V
C
C
A
G
N
D
7
A
G
N
D
8
B
B
N
F
1
(L
)
B
B
N
F
2
(R
)
B
N
F
2
2
(R
)
B
N
F
1
2
(R
)
B
N
F
2
1
(L
)
B
N
F
1
1
(L
)
T
N
F
1
(L
)
T
N
F
2
(R
)
A
G
N
D
3
INDSPSR
INDSPSL
INDSPC
INDSPSW
AGND1
GOUTSW
VINSW
AGND2
GOUTC
VINC
OUTSW
OUTC
OUTSL
OUTSR
VINSL
GOUTSL
IN
2
M
IX
(R
)
IN
2
D
S
P
(R
)
IN
1
M
IX
(L
)
IN
1
D
S
P
(L
)
O
U
T
1
(L
)-
O
U
T
2
(R
)-
O
U
T
1
(L
)+
O
U
T
2
(R
)+
IN
D
V
D
S
W
IN
D
V
D
C
IN
D
V
D
S
L
IN
8
1
(F
L
)
IN
7
2
(R
)
IN
7
1
(L
)
IN
6
2
(R
)
IN
6
1
(L
)
IN
5
2
(R
)
IN
5
1
(L
)
IN
4
2
(R
)
IN
4
1
(L
)
IN
3
2
(R
)
IN
3
1
(L
)
IN
8
2
(F
R
)
IN
D
V
D
S
R
IC701
BD3811K1
E2,
G
N
D
Z
O
N
E
_
R
G
N
D
G
N
D
G
N
D
6
C
H
_
S
R
6
C
H
_
C
G
N
D
6
C
H
_
F
R
G
N
D
G
N
D
G
N
D
G
N
D
S
W
_
S
U
M
S
W
_
G
N
D
L
T
C
9
2
7
3
_
S
T
B
T
U
N
E
R
_
L
D
/A
_
O
U
T
_
F
R
D
/A
_
O
U
T
_
C
D
/A
_
O
U
T
_
S
R
D
/A
_
O
U
T
_
S
B
L
3
8
1
1
K
1
_
M
U
T
E
R
L
L
RLY701
FR
GND
GND
FR
FL
GND
SBR
R
R
L
R
L
R
L
R
L
R
L
R
R_NO
AUX
CD
E3
Z
O
N
E
_
L
V
.A
U
X
_
L
G
N
D
V
.A
U
X
_
R
G
N
D
6
C
H
_
S
L
G
N
D
6
C
H
_
S
W
G
N
D
6
C
H
_
F
L
G
N
D
G
N
D
G
N
D
G
N
D
G
N
D
G
N
D
+
1
5
V
-1
5
V
S
W
_
O
U
T
SW
C
SL
FL
C
GND
SL
SR
GND
SBL
L
R
T
C
9
2
7
3
_
D
A
T
A
R
L
Y
_
M
U
L
T
I
V
C
R
_
M
U
T
E
T
U
N
E
R
_
R
A
/D
_
IN
_
L
D
/A
_
O
U
T
_
S
W
D
/A
_
O
U
T
_
S
L
D
/A
_
O
U
T
_
S
B
R
3
8
1
1
K
1
_
C
L
K
3
8
1
1
K
1
_
D
A
T
A
SR
GND
GND
T
O
C
N
T
B
O
A
R
D
CDR/TAPE IN
IC704,IC705
J701,J702
CDR/TAPE OUT
VCR OUT
*. C701L/R - C708L/R : E1, E2, C, H, T ONLY
G
N
D
G
N
D
FROM CPU BOARD
INPUT/VOLUME BOARD
TO CPU BOARD
SBR
SBL
VCR IN
TV/DBS
DVD/VDP
T
C
9
2
7
3
_
C
L
K
A
/D
_
IN
_
R
D
/A
_
O
U
T
_
F
L
FROM CPU BOARD