Kurzweil K2600 Series Service Manual
7-23
Audio Board (keyboard 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
1
2
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:
K2600K AUDIO PCB SV2.5
A DACs, B DACs, Filters
MRL
021212
RDV0
021212D0
9/21/99
01
04
R64
22.6K
1
2
R44
226K
1
2
R24
57.6K
1
2
R63
22.6K
1
2
R43
226K
1
2
R23
57.6K
1
2
R62
22.6K
1
2
R42
226K
1
2
R22
57.6K
1
2
R61
22.6K
1
2
R41
226K
1
2
R21
57.6K
1
2
R68
4.12K
1
2
R56
53.6K
1
2
R55
6.98K
1
2
R60
6.98K
1
2
R48
4.64K
1
2
R36
76.8K
1
2
R35
15.0K
1
2
R40
15.0K
1
2
R28
4.64K
1
2
R16
31.6K
1
2
R15
8.45K
1
2
R20
8.45K
1
2
R4
3.57K
1
2
R8
6.04K
1
2
R67
4.12K
1
2
R54
53.6K
1
2
R53
6.98K
1
2
R59
6.98K
1
2
R47
4.64K
1
2
R34
76.8K
1
2
R33
15.0K
1
2
R39
15.0K
1
2
R27
4.64K
1
2
R14
31.6K
1
2
R13
8.45K
1
2
R19
8.45K
1
2
R3
3.57K
1
2
R7
6.04K
1
2
R66
4.12K
1
2
R52
53.6K
1
2
R51
6.98K
1
2
R58
6.98K
1
2
R46
4.64K
1
2
R32
76.8K
1
2
R31
15.0K
1
2
R38
15.0K
1
2
R26
4.64K
1
2
R12
31.6K
1
2
R11
8.45K
1
2
R18
8.45K
1
2
R2
3.57K
1
2
R6
6.04K
1
2
R65
4.12K
1
2
R50
53.6K
1
2
R49
6.98K
1
2
R57
6.98K
1
2
R45
4.64K
1
2
R30
76.8K
1
2
R29
15.0K
1
2
R37
15.0K
1
2
R25
4.64K
1
2
R10
31.6K
1
2
R9
8.45K
1
2
R17
8.45K
1
2
R1
3.57K
1
2
R5
6.04K
1
2
+
C26
47uF
1
2
+
C24
47uF
1
2
+
C22
47uF
1
2
+
C20
47uF
1
2
C68
2200PF 1%
1
2
C67
2200PF 1%
1
2
C66
2200PF 1%
1
2
C60
150PF 2%
1
2
C56
2200PF 1%
1
2
C48
68PF 2%
1
2
C44
2200PF 1%
1
2
C36
180PF 2%
1
2
C25
DNS
1
2
C32
2200PF 1%
1
2
C59
150PF 2%
1
2
C55
2200PF 1%
1
2
C47
68PF 2%
1
2
C43
2200PF 1%
1
2
C35
180PF 2%
1
2
C23
DNS
1
2
C31
2200PF 1%
1
2
C58
150PF 2%
1
2
C54
2200PF 1%
1
2
C46
68PF 2%
1
2
C42
2200PF 1%
1
2
C34
180PF 2%
1
2
C21
DNS
1
2
C30
2200PF 1%
1
2
C65
2200PF 1%
1
2
C57
150PF 2%
1
2
C53
2200PF 1%
1
2
C45
68PF 2%
1
2
C41
2200PF 1%
1
2
C33
180PF 2%
1
2
C19
DNS
1
2
C29
2200PF 1%
1
2
C11
220pF
1
2
C13
220PF
1
2
C16
220pF
1
2
C12
220pF
1
2
C64
1000PF 2%
1
2
C40
270PF 2%
1
2
C52
47PF 2%
1
2
C63
1000PF 2%
1
2
C39
270PF 2%
1
2
C51
47PF 2%
1
2
C62
1000PF 2%
1
2
C38
270PF 2%
1
2
C50
47PF 2%
1
2
C61
1000PF 2%
1
2
C37
270PF 2%
1
2
C49
47PF 2%
1
2
C189
0.1uF
1
2
C4
0.1uF
1
2
C27
0.1UF
1
2
C7
0.1uF
1
2
C28
0.1UF
1
2
C8
0.1uF
1
2
C14
0.1uF
1
2
C3
0.1uF
1
2
C9
0.1uF
1
2
C10
0.1uF
1
2
C1
0.1uF
1
2
C15
0.1uF
1
2
+
C193
47uF
1
2
+
C192
47uF
1
2
+
C191
47uF
1
2
+
C190
47uF
1
2
+
C188
100uF 6.3V
1
2
+
C17
100uF 25V
1
2
+
C5
100uF 25V
1
2
+
C18
100uF 25V
1
2
+
C6
100uF 25V
1
2
+
C2
100uF 6.3V
1
2
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
1
2
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
+
-
U4
NE5532A
3
2
1
+
-
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
+
-
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-B2}
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
Summary of Contents for K2600 Series
Page 4: ......
Page 12: ...Kurzweil K2600 Series Service Manual Contents viii...
Page 30: ...2 12 Diagnostics Description of Tests...
Page 50: ...3 20 K2600R Disassembly Assembly Front Panel Assembly...
Page 86: ...4 36 K2600 K2600X Disassembly Assembly K2600X Keyboard Assembly...
Page 102: ...5 16 Troubleshooting K2600R Interconnect Diagram...
Page 130: ......