Kurzweil PC2 Series Service Manual
7-7
Engine Board–Audio Channel, Muting Control (page 5 of 5)
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
A
B
C
D
A
B
C
D
GJ1
Ground Join
2
1
VR1
78M05
2
GND
1
IN
3
OUT
+
-
U27
NE5532
3
2
84
1
+
-
U26
NE5532
3
2
84
1
J411
BV-32
2
+1
3
+2
1
-
J412
PC2 AUDIO OUT
2
LOUT~
4
ROUT+
5
ROUT~
3
AGND
1
LOUT+
C54
5600pF 5% NPO
12
C55
5600pF 5% NPO
12
C53
5600pF 5% NPO
12
C52
5600pF 5% NPO
12
C70
0.1 uF
12
C69
0.1 uF
12
C47
0.1 uF
12
C41
0.1 uF
12
C58
5600pF 5% NPO
12
C59
5600pF 5% NPO
12
C76
2200pF 5% NPO
12
C75
2200pF 5% NPO
12
C57
5600pF 5% NPO
12
C56
5600pF 5% NPO
12
C71
2200pF 5% NPO
12
C72
2200pF 5% NPO
12
C42
0.1 uF
12
C43
0.1 uF
12
U23
AK4393
4
PD
18
AVDD
19
AVSS
5
BICK
26
CKS0
27
CKS1
28
CKS2
10
DEM0
11
DEM1
9
DFS
12
DIF0
13
DIF1
14
DIF2
2
DVDD
1
DVSS
7
LRCK
3
MCLK
25
P/_S
6
SDATA
8
SMUTE
15
SVSS
17
VREFH
16
VREFL
23
AOUTL+
22
AOUTL-
21
AOUTR+
20
AOUTR-
24
VCOM
+
-
U27
NE5532
5
6
7
+
-
U25
NE5532
5
6
7
+
-
U24
NE5532
5
6
7
+
-
U26
NE5532
5
6
7
D5
S1A (1N4001)
21
Q3
MMBT2907A
B
CE
Q4
MMBT2907A
B
CE
Q2
MMBT2222A
B
CE
D2
LL4148
21
D3
LL4148
21
-+
NO
NO
NC
NC
RY2
DPDT
110
8
3
9
2
7
4
-+
NO
NO
NC
NC
RY1
DPDT
110
8
3
9
2
7
4
+
C64
10UF
12
+
C66
10UF
12
C77
0.1 uF
12
C78
0.1 uF
12
C60
0.1 uF
12
C61
0.1 uF
12
C74
0.1 uF
12
C73
0.1 uF
12
C62
0.1 uF
12
C63
0.1 uF
12
+
C51
47uF 35V
12
+
C50
47uF 35V
12
+
C49
47uF 35V
12
+
C48
47uF 35V
12
+
-
U25
NE5532
3
2
48
1
+
-
U24
NE5532
3
2
48
1
R32
330
12
R35
36 1/8W
12
R46
499, 1%, 1/16W
12
R42
487, 1%, 1/16W
12
R47
499, 1%, 1/16W
12
R43
487, 1%, 1/16W
12
R63
453, 1%, 1/16W
12
R67
1.24K, 1%, 1/16W
12
R62
453, 1%, 1/16W
12
R66
1.24K, 1%, 1/16W
12
R55
475, 1%, 1/16W
12
R54
475, 1%, 1/16W
12
R45
499, 1%, 1/16W
12
R41
487, 1%, 1/16W
12
R53
475, 1%, 1/16W
12
R44
499, 1%, 1/16W
12
R40
487, 1%, 1/16W
12
R60
1.24K, 1%, 1/16W
12
R56
453, 1%, 1/16W
12
R52
475, 1%, 1/16W
12
R57
453, 1%, 1/16W
12
R61
1.24K, 1%, 1/16W
12
R29
10K
12
D4
BAS40
13
+
C92
1000uF, 16V
12
+
C44
10UF
12
+
C39
10UF
12
+
C65
10UF
12
+
C67
10UF
12
+
C40
22UF 16V
12
+
C45
10UF
12
+
C46
10UF
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:
PC88 II ENGINE
AUDIO CHANNEL, MUTING CONTROL
D. O'NEILL
021197 D V4
P82RDV4 9/19/2000
55
R50
464, 1%, 1/16W
12
R51
464, 1%, 1/16W
12
R49
464, 1%, 1/16W
12
R48
464, 1%, 1/16W
12
R31
470
12
R33
470
12
R34
1K
12
R30
4.7K
12
R70
47
12
+12V
+12V
+VBAT BUVDD
~12V
~12V
+12V
+5VANA
VCC
VCC VCC
VCC
+12V
RESET {1-B4,D5;2-A1;
+12V
MUTE {1-D1,D3}
VCC
~12V
~12V
VCC
CLK25 {1-C1,2-A1,3-D8}
RESET {1-B4,D5;2-A1;3-D1;4-D6}
DACBCLK {2-A8}
DACDATA {2-A8}
DACL_R {2-A8}
DACMUTE {1-C1,C4}
+5VANA
DNS
To Coils
IMPORTANT! - PLACE GJ1 AS CLOSE AS POSSIBLE TO U23-14,15
3-D1;4-D6}
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