Read Harman Kardon HK 990 Service Manual online
R36
10K
10K
R37
9.1K1%
C50
100nF
100nF
C15
100nF
100nF
C47
100pF(NPO)
R33
1.78K1%
1.78K1%
C12
2.2uF
2.2uF
C49
100nF
C2
100nF
100nF
R12
12K1%
C55
100pF(NPO)
R71
680R
680R
+
C53
47uF16V
47uF16V
C54
680pF(NPO)
+
C21
47uF/25V
R43
10K
10K
R44
9.1K1%
+
C45
47uF16V
47uF16V
R46
1.78K1%
1.78K1%
R11
18K1%
18K1%
+
C1
10uF/50V
R68
680R
680R
R3
4
5.1K
1%
P
VDD
1
RX0
2
I2C
3
RX1
4
RX2
5
RX3
6
INT
7
VOUT
8
CDTO/TEST
9
LRCKB
10
BICKB
11
SDTOB
12
OLRCKA
13
ILRCKA
14
BICKA
15
SDTOA
16
MCKO
17
TVDD
18
DVS
S
19
DVDD
20
XTI
21
XTO
22
TX
23
MCLK2
24
PD
25
CDTI/SDA
26
CCLK/SCL
27
CS/TEST
28
SDTIA1
29
SDTIA2
30
SDTIA3
31
SDTIB
32
HVDD
33
HVS
S
34
HPR
35
HPL
36
MUTET
37
LOUT2
38
ROUT2
39
LOUT1
40
ROUT1
41
VCOM
42
AVDD2
43
AVS
S
2
44
LISEL
45
LOPIN
46
ROPIN
47
RISEL
48
AVS
S
1
49
AVDD1
50
LIN1
51
RIN1
52
LIN2
53
RIN2
54
LIN3
55
RIN3
56
LIN4
57
RIN4
58
LIN5
59
RIN5
60
LIN6
61
RIN6
62
PV
SS
63
R
64
U2
AK4683
AK4683
C4
6
680pF(N
P
O
)
R4
8
5.1K
1%
R6
18K1%
18K1%
C5
1uF
1uF
+5V
A+5V
+15VA
-15VA
SRC_AESOUT
CLK_24MHZ
RST_AK4683#
SDA_5V
SCL_5V
SPDIF_RECORD
REC_out_L
REC_out_R
INT_AK4683
I2C pin :Control mode select pinL = 4 wi re serial, H = I2C
2
3
1
4
U7A
NJM2068
6
5
7
8
U7B
NJM2068
C101
100nF
C99
100nF
100nF
+15VA
-15VA
6
5
7
8
U11B
NJM5532M
2
3
1
4
U11A
NJM5532M
R117
10K1%
R121
10K1%
10K1%
R116
10K1%
R120
10K1%
R115
10K1%
R114
10K1%
R118
10K1%
R119
10K1%
LIN+
LIN-
RIN+
RIN-
GND
GND
T
O
X
L
R BO
RD
13
9
11
K8B
JRC-27F1005-M-555
JRC-27F1005-M-555
4
6
8
K8A
JRC-27F1005-M-555
JRC-27F1005-M-555
13
9
11
K9B
JRC-27F1005-M-555
JRC-27F1005-M-555
4
6
8
K9A
JRC-27F1005-M-555
JRC-27F1005-M-555
1
2
3
4
CN2
4P(2.0)
TO P
HONO B
OAR
D
PHONO_L
PHONO_R
R143
100R
C116
47uF16V
47uF16V
R145
100R
C115
47uF16V
R141
100R
C112
47uF16V
R142
100R
C113
47uF16V
47uF16V
XLR_L
XLR_R
R_IN1
L_IN1
L_IN1
R_IN1
P[2]
P[2]
P[4]
P[4]
P[4]
P[4]
P[1,2]
P[1,2]
P[1,2]
P[2]
P[2]
P[2]
P[2]
P[2]
P[2]
P[4]
P[4]
+
C107
10uF/50V
+
C104
10uF/50V
+
C106
10uF/50V
+
C105
10uF/50V
10uF/50V
R18
47K
47K
R19
47K
R20
47K
47K
R17
47K
1
2
L4
NC
R13
5.1R
1
2
3
4
5
6
7
8
9
CN1
9P(2.0)
+15VA
-15VA
GND
+15VA
-15VA
IN_L
IN_R
C122
100nF
C24
47uF16V
C38
47uF16V
C51
150pF
C39
150pF
R32
10K1%
R30
10K1%
10K1%
R35
10K1%
R42
10K1%
10K1%
R49
0
R45
0
R47
0
R50
0
R53
NC
R56
NC
R52
NC
NC
R61
NC
R69
10K
10K
R70
10K
10K
C67
102(NPO)
R66
7.5K1%
7.5K1%
R63
7.5K1%
7.5K1%
C60
102(NPO)
1
2
L7
FB-0805
A5V
A5V
119
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