Page 1
Laney
Classic British Amplification
Newlyn Road, Cradley Heath, West Midlands. B64 6B£
www.laney.co.uk
CD640
Service Information
Page 2
Line
SW1
5JACK1
-12dB(40dB)
5C8
47U/16V
5C9
47U/16V
Pad
5R20
22K
5R36
2.7K
5VR2
10KB
5R11
100
5C3
47U/16V
5R18
6.8K
Mic
5JACK2
SW1
5R17
6.8K
NC
GND
GND
GND
+15V
+48V
-15V
IC4
JP7X2
5C19
222
47U/50V
MAIN
E
M
5C10
5R19
2.2K
47U/50V
5C11
5R15
1K
1K
5R16
5D5
4148
5C18
222
5C17
222
5K1
SW DPDT
5C7
470U/16V
5D4
4148
5D3
4148
0V
5R13
560
0V
0.6V
-8V
5R21
4.7K
-8V
0.6V
5R22
10K
A1015
5Q2
4.7K
5R10
5Q1
A1015
5R9
10K
4148
5D7
4148
5D1
5D6
4148
22P
5C21
4148
5D2
5R26
22K
6
5
5R8
2.2K
2
31
Mid
5R49
15K
5C12
5C6
47U/16V
5R6
2.2K
5R7
47K
472
5C1
222
5R39
12K
5R4
4.7K
8
-38dB
7
1C3
4558
5C21
22P
22K
5R38
-38dB
5R25
4558
2.7K
IC3
4
2
3
5R48
15K
658
5R47
12K
8
4
4
47U/16V
5C24
-25dB -25dB
1
IC1
4558
Mon
5R5
10K
7
5C5
47U/16V
IC2
4558
5VR4
10KB
5R41
4.7K
5R35
10K
Level
5C16
103
5VR3
50KB
5VR7
10KB
50KB
5VR1
5C15
47U/16V
5C2
5C24
472
5R45
4.7K
5R43
22K
Bass
223
5R1
100K
5C14
103
Treble
5R42
4.7K
5R2
1K
IC1
47U/16V
4558
5
6
4.7K
5C20 100P
2
3
IC2
4558
5R3
100P
5C23
5C1
7
1
47U/16V
5C4
100
5R12
Fx
5VR5
10KB
-18dB
10K
5R37
-10dB
5R34
10K
Laney
CD640 Input Circuit
12/05/2003
SK.A97.148
Page 3
Line
SW1
5JACK1
J?
PHONEJACK STEREO SW
Mic
5JACK2
SW1
NC
GND
GND
GND
+15V
+48V
-15V
IC4
JP7X2
5C8
47U/50V
5C10
5R19
2.2K
5C19
222
47U/50V
5C11
MAIN
E
M
-12dB(40dB)
47U/16V
5C9
47U/16V
5R17
1K
1K
5R18
R?
RES2
5C10
222
R?
RES2
5D5
4148
5C11
222
47U/16V
5C8
5C9
47U/16V
22K
5R31
22K
5R20
22K
Pad
5C7
470U/16V
5D4
4148
5D3
4148
5R46
5R16
10K
5R15
10K
0V
5R13
560
0V
0.6V
-8V
5R21
4.7K
-8V
0.6V
5R22
10K
A1015
5Q2
4.7K
5R10
5Q1
A1015
5R9
10K
4148
5D7
4148
5D1
5D6
4148
5R36
2.7K
22P
5C21
4148
5D2
5R26
22K
6
5
5R8
2.2K
2
31
5R11
100
5VR2
10KB
5C3
47U/16V
Mid
5VR4
10KB
5R41
4.7K
5R35
10K
5C16
103
5VR3
50KB
5VR7
10KB
50KB
5VR1
5C15
47U/16V
5C2
5C24
472
5R45
4.7K
5R43
22K
Bass
223
5R1
100K
5C14
103
5R42
4.7K
Level
5R2
1K
Treble
IC1
47U/16V
4558
5
6
4.7K
5C20 100P
2
3
IC2
4558
5R3
100P
5C23
5C1
7
1
47U/16V
5C4
100
5R12
Fx
5VR5
10KB
-18dB
10K
5R37
-10dB
5R34
10K
5R49
15K
5C12
5C6
47U/16V
5R6
2.2K
5R7
47K
472
5C1
222
5R39
12K
5R4
4.7K
8
-38dB
7
1C3
4558
5C21
22P
22K
5R38
-38dB
5R25
4558
2.7K
IC3
4
2
3
5R48
15K
658
5R47
12K
8
4
4
47U/16V
-25dB -25dB
5C24
1
IC1
4558
Mon
5R5
10K
7
5C5
47U/16V
IC2
4558
Laney
CD640 Dual Mono Input Circuit
12/05/2003
SK.8.A97.150
SK.8.A97.154
Page 4
9JK2
AUX IN
RCA
-15dB
RCA
4JP1
JP3
4R3
TAPE IN
-15dB
4JP6
Power
Led
4R8
100
47U/16V
4C8
4R5
4.7K
4C5
47U/16V
47U/16V
4C6
4R2
4.7K
4.7K
100P
4C2
4R11
-8dB
10K
6
5
2
3
47U/16V
4C10
8
7
4IC10
4558
4C1
100P
4R10
-8dB
10K
47U/16V
4C7
1
4IC10
4
4558
4R12
10K
4R4
10K
7VR17
50KA
7VR18
50KA
R1
6.8K
MAIN
MAIN
-15V
+15V
GND
GND
NC
NC
NC
NC
NC
NC
JP2
4JP8
JP8
4JP9
JP7X4
NC
GND
GND
GND
+15V
NC
-15V
4R7
100
47/0.5W
4R45
From
EQ Output
4JP4
JP3
MAIN
GND
MON
4R47
47/0.5W
4C9
47U/16V
4C20
47U/16V
4R40
12K
4R5
10K
4C14
47P
4R6
10K
4C13
47P
4R41
12K
4C22
47U/16V
4C12
47U/16V
4R14
10K
4C17
47U/16V
4R22
10K
4R43
22K
4148
8
2
4D13
4D14
1
3
4IC3
4558
4C3 47P
4R15
10K
8
6
5
2
3
4
4C11
7
4IC9
47U/16V
4C15
NE5532
104
4C16
47P
4R23
10K
1
4IC7
NE5532
22K
4148
4D12
6
7
5
4IC3
4
4558
4148
4D44
4D11
4148
4R16
47K
4C21
2.2U/50V
4C4
47P
4R17
47K
2
1
3
4IC9
4R13
22K
4
NE5532
5
7
6
4IC7
8
NE5532
R2
27KR327K
4C19
2.2U/50V
D1
LED
BTL
MAIN
MON
KEY
GND
BTL
MON
MAIN
KEY
Power
Amp
Mode
D3
LED
SK.8.A97.143
GND
MAIN
GND
KEY
6.8K
4R31
4R28
4R27
4R26
4R24
4R42
6.8K
2
3
4R34
820
2
3
4R33
470
6
5
4R32
330
6
5
4R35
150
2
3
4R36
100
4R30
820
6
5
470
21
3
330
67
5
150
21
3
100
67
5
4
8
4
8
4
8
4
8
4
8
1
4IC2
2903
1
4IC1
2903
7
4IC1
2903
7
4IC2
2903
1
4IC4
2903
7
4IC4
2903
4IC5
2903
4IC5
2903
4IC6
2903
4IC6
2903
4R29
2.7K
4R25
2.7K
4D10
LED
4D9
LED
4D8
LED
4D7
LED
4D6
LED
4D5
LED
4D4
LED
4D3
LED
4D2
LED
4D1
LED
Laney
CD640 Masters Circuit
12/05/2003
SK.8.A97.154
SK.8.A97.143
SK.8.A97.152
Page 5
Footswitch
9JACK2
NC
NC
NC
MON
EFF
MAIN
+15V
+5V
+48V
-15V
GND
GND
OUT
GND
9JP6
JP7X2
9JP5
JP6
9JP1
JP2
-15V
+48V
+15V
GND
GND
GND
NC
104
9C10
9C11
104
9R18
100
9C7
47U/16V
9C13
104
2
3
9R9
6.8K
8
4
22P
9C17
1
9IC2
4558
-13dB(MIC)
9C12
104
9R21
10K
9R20
10K
9R10
10K
9C4
47U/16V
9C3
47U/16V
9R1
2.2K
9R5
2.2K
9IC1
4558
1
9IC1
4558
7
9JP3
9C14
9R23
22P
9C16
9R14
12K
100
7
9IC2
4558
3
2
9R2
2.2K
9C5
9R13
47U/16V
-12dB(MIC)
9C1
47U/16V
9R4
100K
9R29
12K
6
5
8
472
5.6K
9R24
10K
9R30
10K
9C9
47U/16V
9R16
3.3K
OUT
NC
OUT
IN
GND
IN
9JP2
JP2
+5V
GND
9JP4
JP9
9R15
3.3K
9C8
47U/16V
JP5
9W1
K
9C15
104
K1
K2
K3
K4
A
B
C
D
K
9D1 4148
9D3 4148
9D4 4148
9D5
4148
9D6 4148
9D7
4148
9D2
4148
9D8
4148
9W4
Vocal
9W2
Small Hall
9C2
5
6
47U/16V
4
9R6
9R3
2.2K
100K
7VR15
50KB
7VR16
50KB
9W3
Large Hall
On
+5V
9C6
47U/16V
9R17
100
Laney
CD640 Digital Effects Control Circuit
12/05/2003
SK.8.A97.153
FX
Out
9R26
10K
9VR1
B10KX2
9R27
10K
9VR1
B10KX2
FX out
9JK1
Page 6
-15V
+15V
GND
GND
Main
Mon
GND
8JP3
JP7 , JP8
8R46
220
8C38
220U/16V
220U/16V
8R31
220
8C37
8R12
220
47U/25V
8C44
8R59
22K
Main EQ
1K
8R22
8
2
8C2
8C32
1U/50V
3
8R23
100K
4
8IC5
4558
683
8JP2--1 8JP2--2 8JP2--3 8JP2--4 8JP2--7 8JP2--8
VR1
100K
47P
8C27
8JP4
JP4
10K
8
8R39
6
5
8C36
220U/16V
4
8C31
1U/50V
8C45
7
8IC9
47U/16V
4558
-18dB(-42dB,MIC)
1K
6R2
2
8C1
3
8R3
683
100K
8JP4
JP4 3
8
4
8IC1
4558
1
VR2
100K
8C30
334
8C43
47U/16V
1
1K
9R13
8C5
8R25
273
100K
Master Volume
È¥154ָʾ°å
10KB
9VR1
8R52
100K
1K
8R4
8C29
8C3
334
273
8R55
2.2K
8R7
100K
1K
8R26
2
1
3
8C6
104
8IC6
4558
VR3
100K
8R57
2.2K
2
16
8IC9
JRC4558
2
8C8
3
8IC7
8R27
123
100K
4558
220
8R32
8C40
-11dB -11dB
8R56
5.6K
47U/16V
8JP2--6 8JP2--5
8R35
10K
1
VR4
100K
8C10
473
1K
8R28
8C12
472
8R29
100K
1K
8R40
2
1
8IC8
4558
VR5
100K
8R33
10K
8C14
153
8C2247P
3
8
1
8IC5
5
4
JRC4558
8C39
47U/16V
8C16
182
8R41
100K
8C33
47UU/25V
8R48
220
6
5
L¾ùºâÊä³ö
Monitor EQ
1K
8R6
2
1
8IC2
4558
8C4
104
3
9C16
123
8R7
100K
2
3
8IC3
4558
1K
8R8
8C11
472
8R9
100K
2
3
8IC4
4558
1
8C9
473
1K
8R15
8C15
182
8R16
100K
6
5
8C13
1
153
8R1
220
8
4
8IC6
4558
8
4
8IC2
4558
7
VR6
100K
1K
8C18
103
8R42
8C24
102
8R43
100K
6
5
8JP10
JP2
8JP9
JP2
4558
8IC7
7
VR7
100K
8C20
332
8R45
1K
8C26
220
8R44
100K
8
6
7
5
8IC8
4
4558
JK
MAIN OUT
To meter circuit
1K
8R17
8C23
102
8R18
100K
6
5
4558
8IC3
7
8C17
103
1K
8R19
8
8C25
220
8R20
100K
6
5
8IC4
4
4558
8C19
7
332
8JP1--1 8JP1--2 8JP1--3
Laney
47U/25V
8C41
8R60
22K
8R11
220
VR1
100K
6
5
47P
8C28
10K
8R54
7
8IC10
4558
47U/16V
8C42
8
-18dB(-42dB,MIC)
8JP5
JP4
8C35
220U/16V
VR2
100K
47U/16V
8C46
21 651
3
8R51
2.2K
8R50
100K
Master Volume
9VR2
10KB
8R49
2.2K
VR3
100K
-11dB -11dB
8R21
5.6K
8IC10
JRC4558
CD640 Graphic Eq Circuit
12/05/2003 SK.8.A97.145 SK.8.A97.149 SK.9.A97.152
VR4
100K
8JP1--6 8JP1--5
8R14
10K
8JP1--4 8JP1--7 8JP1--8 8JP1--9
VR5
100K
8
4
8R13
10K
8C2147P
8IC1
JRC4558
8C34
47UU/25V
8R10
220
VR6
100K
8JP8
JP2
VR7
100K
JK
MON OUT
Page 7
+56V
R29
1K
R34
430
R16
300
Q6
B649
Q7
D669
Q5
D669
R25
300
R31
100
R32
100
D2
4007
5551
5401
Q8
Q10
D1
4007
C18
333
C10
103
C7
333
R38
300
R36
300
D4
4148
103
4148
C9
D3
Q11
C5198
R37
6.8K
6.8K
R35
R40
47/0.5W
R39
47/0.5W
Q9
A1941
Q13
C5200
R44
10
R43
10
R42
0.33/5W
0.33/5W
R45
Q12
A1943
Q15
C5200
R46
R1
10
0.33/5W
.47/5W
R41
R2
10
Q14
A1943
L1
3uH
10/1W
R61
C21473/100V
R18
Q2
3.3K
R22
30
R20
3.3K
R24
30
Q4
D669
R28
470
C2
683/100V
C5
39P/250V
R16
4.7K
D669
R10
470
4.7U/16V
JP1
C1
JP3
VD1
40V
R14
30K
R30
36K
R27
Q3
B649
R26
R26
1K
C16
47U/63V
39P/250V
C14
683/100V
C4
R23
R15
R12
IN
47K
R11
470
VD2
40V
30K
R13
4.7K
R21
30
Q1
B649
R17
3.3K
30
R19
3.3K
IC1
7824
1
24V
IC1 7815
2
1
2
IC2 7915
470U/63VD1
KBP04
T2
3
3
C14
C2
2200U/25V
220VAC
10A
FUSE1
C1
472/250V
250V 10A
K1-1
K1-2
POWER SW
B1-4
B1-1
16V*2
B1-2
B1-3
F1A
JP1
20V
0.5A
F2
2A
F2
12V AC
42V AC*2
KBPC04
4007
D1
4007
D2
C3
2200U/35V
C5
2200U/35V
T1
C1
C12
JP3
104
2200U/25V
KBP3504
400VA 42VAC
Laney
CA
223/400V
35A 400V
CD640 Output Stage + Power supply
12/05/2003
SK.8.A97.144 SK.8.A97.146 SK.8..A97.147 SK.9.A97.220
C10
100U/25V
C7
100U/25V
1
13
7812
IC2
2
100U/16V
104
C5
C8
2
7805
IC3
C33
10000U/63V
C29
10000U/63V
C11
104
C12
104
3
100U/16V
C9
JP3
3
JP5
JP4
+15V
GND
-15V
+12V
GND
GND
+5V
+56V
-56V
+12V
470U/16V
470U/16V
C22
C23
R62
22K
R64
12K
Q23
R65
120
R63
3.3K
C1815
Q23
C1815
-56V
R66
8.2K
A1015
Q24
R49
5.6K
R67
270K
D6
4148
C24
104
C25
47U/16V
JP8 RT
C1815
Q25
Relay
Coil
D7
4007
12V JDC
Q26
D669
JK1
OUT
JK2
BRIDGE
JK1
MON OUT
JK1
JK3
MAIN OUT
JK4
MAIN OUT
Loading...