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5
harman/kardon
E
+5V
+5VA
FB13
FB14
100R
100R
D
CE61
CE62
2
1
1
2
100uF/10V
100uF/10V
C31
C32
100nF
100nF
23
22
RST_1955#
RST
MUTE
2
18
DAC_LRCLK
LRCLK/EF_WCLK
OUT L+
3
17
DAC_BITCLK
BCLK/EF_BCLK
OUT L-
4
21
DAC_SDATA_L
SDATA/EF_LDATA
ZERO_L
5
+5V
EF_RDATA
11
OUT R+
27
12
DAC_MCLK_1
MCK
OUT R-
20
ZERO_R
6
+5V
DSD_SCLK
7
13
DSD_LDATA
FILTR
8
DSD_RDATA
9
14
DSD_PHASE
IREF
25
16
CS_1955_1#
CLATCH
FILTB
26
SCK
CCLK
C
24
MOSI
CDATA
U11
AD1955
B
A
5
4
I/V conversion
C24
+12VA
100nF
+12VA
R46
820R
1%
U5A
OP275GS
3
+
1
2
-
C28
100nF
C185
-12VA
3.3nF
R58
47K
1%
MUTE_1955
CE9
1
2
47uF/25V
C36
100nF
R62
2K7
1%
C37
Servo DC
100nF
CE10
1
2
47uF/25V
+12VA
+12VA
R67
820R
1%
U5B
OP275GS
5
+
7
6
-
-12VA
C186
3.3nF
R79
47K
1%
Servo DC
4
3
+12VA
Q17
2SA1035
CE7
47uF/25V
1
2
C23
R47
C182
100nF
R49
2K2
680pF
2K7
1%
U6A
1%
OP2134UA
3
+
1
2
-
R50
R52
100R
2K7
R56
C178
1%
1%
2K2
680pF
1%
C30
100nF
2
1
+12VA
C33
CE8
100nF
47uF/25V
Q23
2SC2406
U8A
TL072
3
+
1
2
-
C181
C35
R61
-12VA
100nF
100nF
47K
1%
+12VA
-12VA
Q25
2SA1035
CE11
47uF/25V
1
2
C38
R68
C180
100nF
R70
2K2
680pF
2K7
1%
U6B
1%
OP2134UA
5
+
7
6
-
R71
R73
100R
2K7
R77
C179
1%
1%
2K2
680pF
1%
C43
100nF
2
1
+12VA
CE12
47uF/25V
Q31
U8B
2SC2406
TL072
5
+
7
6
-
R82
C176
47K
-12VA
100nF
1%
-12VA
3
2
Differential output stage
R42
R43
330R
330R
1%
1%
Q18
1
1
2SA1035
Q19
1
2SC2406
R44
R45
15K
680R
1%
1%
R48
Q20
330R
R51
1
2SA1035
1%
56R
1%
R54
C177
R55
330R
2.2nF
47K
1
1%
1%
Q21
2SC2406
R57
680R
1%
Q22
1
2SA1035
Q24
1
1
2SC2406
R59
R60
330R
330R
1%
1%
Differential output stage
R63
R64
330R
330R
1%
1%
Q26
1
1
2SA1035
Q27
1
2SC2406
R65
R66
15K
680R
1%
1%
R69
Q28
330R
R72
1
2SA1035
1%
56R
1%
R75
C175
330R
2.2nF
1
1%
Q29
2SC2406
R78
680R
1%
Q30
1
2SA1035
Q32
1
1
2SC2406
R80
R81
330R
330R
1%
1%
Title
Size
Date:
2
1
HD 990/230 Service Manual
UNBAL_L
JP3
XLR male
2
1
K2A
RELAY JRC-19F
R76
47K
1%
K2B
RELAY JRC-19F
Harman/Kardon
HD 990 Main board
Document Number
Rev
Custom
5604C
1.5
Tuesday, October 07, 2008
Sheet
3
10
1
Page 36 of 46
E
D
C
B
A
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