Kurzweil K2600 Series Service Manual
7-18
Audio Board (rack models)–A DACs, B DACs, Filters (1 of 4)
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
A
B
C
D
A
B
C
D
J602
AUDIO POWER
2
+5V
5
--15V
3
AGND
1
DGND
4
+15V
JP1
DAC VOLTAGE SELECT
1
2
3
DGND
J601
K2501 DAC Connector
2 4 6 8 10 12 14 16
1
DACCLK
11
DACDA
9
DACDB
7
CH1
5
CH2
15
CPUMUTE
3
DACLE
13
PWRMUTE
VR2
7905
1
GND
2
IN
3
OUT
VR1
7805
2
GND
1
IN
3
OUT
GJ1
12
YOUNG CHANG CO., LTD.
of Young Chang Co., Ltd. is prohibited.
Reproduction without the express written consent
Filename:
Doc:
Mfg:
Eng:
Sht
By:
Date:
of
Rev:
K2600R Audio PCB SV2.5
A DACs, B DACs, Filters
MATT LINDI
021218 RCV0
021218C0 9/15/99
01 04
R64
22.6K
12
R44
226K
12
R24
57.6K
12
R63
22.6K
12
R43
226K
12
R23
57.6K
12
R62
22.6K
12
R42
226K
12
R22
57.6K
12
R61
22.6K
12
R41
226K
12
R21
57.6K
12
R68
4.12K
12
R56
53.6K
12
R55
6.98K
12
R60
6.98K
12
R48
4.64K
12
R36
76.8K
12
R35
15.0K
12
R40
15.0K
12
R28
4.64K
12
R16
31.6K
12
R15
8.45K
12
R20
8.45K
12
R4
3.57K
12
R8
6.04K
12
R67
4.12K
12
R54
53.6K
12
R53
6.98K
12
R59
6.98K
12
R47
4.64K
12
R34
76.8K
12
R33
15.0K
12
R39
15.0K
12
R27
4.64K
12
R14
31.6K
12
R13
8.45K
12
R19
8.45K
12
R3
3.57K
12
R7
6.04K
12
R66
4.12K
12
R52
53.6K
12
R51
6.98K
12
R58
6.98K
12
R46
4.64K
12
R32
76.8K
12
R31
15.0K
12
R38
15.0K
12
R26
4.64K
12
R12
31.6K
12
R11
8.45K
12
R18
8.45K
12
R2
3.57K
12
R6
6.04K
12
R65
4.12K
12
R50
53.6K
12
R49
6.98K
12
R57
6.98K
12
R45
4.64K
12
R30
76.8K
12
R29
15.0K
12
R37
15.0K
12
R25
4.64K
12
R10
31.6K
12
R9
8.45K
12
R17
8.45K
12
R1
3.57K
12
R5
6.04K
12
+
C26
47uF
12
+
C24
47uF
12
+
C22
47uF
12
+
C20
47uF
12
C68
2200PF 1%
12
C67
2200PF 1%
12
C66
2200PF 1%
12
C60
150PF 2%
12
C56
2200PF 1%
12
C48
68PF 2%
12
C44
2200PF 1%
12
C36
180PF 2%
12
C25
DNS
12
C32
2200PF 1%
12
C59
150PF 2%
12
C55
2200PF 1%
12
C47
68PF 2%
12
C43
2200PF 1%
12
C35
180PF 2%
12
C23
DNS
12
C31
2200PF 1%
12
C58
150PF 2%
12
C54
2200PF 1%
12
C46
68PF 2%
12
C42
2200PF 1%
12
C34
180PF 2%
12
C21
DNS
12
C30
2200PF 1%
12
C65
2200PF 1%
12
C57
150PF 2%
12
C53
2200PF 1%
12
C45
68PF 2%
12
C41
2200PF 1%
12
C33
180PF 2%
12
C19
DNS
12
C29
2200PF 1%
12
C11
220pF
12
C13
220PF
12
C16
220pF
12
C12
220pF
12
C64
1000PF 2%
12
C40
270PF 2%
12
C52
47PF 2%
12
C63
1000PF 2%
12
C39
270PF 2%
12
C51
47PF 2%
12
C62
1000PF 2%
12
C38
270PF 2%
12
C50
47PF 2%
12
C61
1000PF 2%
12
C37
270PF 2%
12
C49
47PF 2%
12
C189
0.1uF
12
C4
0.1uF
12
C27
0.1UF
12
C7
0.1uF
12
C28
0.1UF
12
C8
0.1uF
12
C14
0.1uF
12
C3
0.1uF
12
C9
0.1uF
12
C10
0.1uF
12
C1
0.1uF
12
C15
0.1uF
12
+
C193
47uF
12
+
C192
47uF
12
+
C191
47uF
12
+
C190
47uF
12
+
C188
100uF 6.3V
12
+
C17
100uF 25V
12
+
C5
100uF 25V
12
+
C18
100uF 25V
12
+
C6
100uF 25V
12
+
C2
100uF 6.3V
12
U1
74HC139
14
A
13
B
15
G
12
Y0
11
Y1
10
Y2
9
Y3
U1
74HC139
2
A
3
B
1
G
4
Y0
5
Y1
6
Y2
7
Y3
L1
2.5T
12
U2
AD1865
21
+5VA
4
+5VD
22
-5VA
15
AGNDL
28
AGNDR
7
CLK
8
DGND
19
LADJ
10
LDIN
9
LLE
13
LRF
14
LSJ
20
LTRIM
11
NC1
16
NC2
27
NC3
25
NC4
18
NC5
24
RADJ
5
RDIN
6
RLE
2
RRF
1
RSJ
23
RTRIM
17
LIOUT
12
LVOUT
26
RIOUT
3
RVOUT
U3
AD1865
21
+5VA
4
+5VD
22
-5VA
15
AGNDL
28
AGNDR
7
CLK
8
DGND
19
LADJ
10
LDIN
9
LLE
13
LRF
14
LSJ
20
LTRIM
11
NC1
16
NC2
27
NC3
25
NC4
18
NC5
24
RADJ
5
RDIN
6
RLE
2
RRF
1
RSJ
23
RTRIM
17
LIOUT
12
LVOUT
26
RIOUT
3
RVOUT
+
-
U11
NE5532A
3
2
1
+
-
U10
NE5532A
3
2
1
+
-
U9
NE5532A
3
2
1
+
-
U8
NE5532A
3
2
1
+
-
U7
NE5532A
3
2
1
+
-
U6
NE5532A
3
2
1
+
-
U5
NE5532A
3
2
1
+
-
U4
NE5532A
3
2
1
+
-
U11
NE5532A
5
6
84
7
+
-
U10
NE5532A
5
6
84
7
+
-
U9
NE5532A
5
6
84
7
+
-
U8
NE5532A
5
6
84
7
+
-
U7
NE5532A
5
6
84
7
+
-
U6
NE5532A
5
6
84
7
+
-
U5
NE5532A
5
6
84
7
+
-
U4
NE5532A
5
6
84
7
PWRSENSE {4-A2} DCLKD {2-A1}
DCLKB {2-A1}
UNMUTE {4-A2}
DACDB {2-A1}
DACDA {2-A1}
DACLE {2-A1}
ALEFT {3-A1,4-B1}
~15 ~15
DACDA
DACDB
DACLE
+15 +15
DCLKA
~5ANA +5ANA
ARIGHT {3-A4,4-C1}DCLKC
~15 ~15
Vcc
+15 +15
BLEFT {3-A6,4-B1}
~15 ~15
+15 +15
Vcc
BRIGHT {3-C1,4-C1}
~15 ~15
+15 +15
+15
+5ANA
Vcc
~5ANA
~15
DNS
DNS
DNS
DNS
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