Page 1
Laney
Classic British Amplification
Newlyn Road, Cradley Heath, West Midlands. B64 6B£
www.laney.co.uk
CD850S
Service Information
Page 2
5R18
6.8K
SW1
5JACK1
Line
Mic
5JACK2
SW1
5R17
6.8K
NC
GND
GND
GND
+15V
+48V
-15V
IC4
JP7X2
-12dB(40dB)
5C8
5C9
47U/50V
5C19
222
L OUT
R OUT
E
M
47U/16V
47U/16V
5C10
5R19
2.2K
47U/50V
5C11
5R15
1K
1K
5R16
5D5
4148
5C18
222
5C17
222
Pad
5K1
SW DPDT
5C7
470U/16V
5D4
4148
5D3
4148
5R20
22K
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
5VR4
10KB
5R41
4.7K
5R34
10K
Level
5C16
103
5VR3
50KB
5VR7
10KB
50KB
5VR1
5C15
47U/16V
5C24
472
5R45
4.7K
5R43
22K
Bass
223
5R1
100K
5C14
103
5R2
1K
Treble
5R42
4.7K
IC1
4558
5
6
5R3
4.7K
5C20 100P
100P
5C23
2
3
IC2
4558
5R49
Mid
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
2.7K
4
4558
IC3
2
3
5R48
15K
658
5R47
12K
8
4
4
47U/16V 5C2
-25dB -25dB
5C24
1
IC1
4558
Mon
5R5
10K
7
5C5
47U/16V
IC2
4558
5C3
47U/16V
47U/16V
5C1
7
5R46
4.7K
5R31
1
4.7K
FX
5VR5
10KB
-18dB
5R32
10K
10K
5R37
-10dB
5R35
10K
5VR6
10KB
Pan
47U/16V
5C4
100
5R12
Laney
CD850S Input Circuit
12/05/2003
SK.A97.095
Page 3
Right
Input
6JACK1
CK6.3
6JACK2
CK6.3
Left/
Mono
Input
-10dB
47U/16V
4C26
-10dB
47U/16V
6C25
6R54
10K
6R60
22K
6R53
10K
6R59
22K
6D4
4148
6D1
4148
4148
6D2
6D3
4148
6R35
100
6C19
6VR1
6C3
50KB
103
6R56
6.8K
8
2
3
4
IC4
4558
47U/16V
6C24
-13dB
6R37
4.7K
6VR3
50KB
6R29
1K
6C5
222
6R32
22K
6C7
103
6R2
4.7K
6C1
100P
-13dB
8
2
1
3
IC3
4558
5VR2
50KB
6R5
15K
6C13
472
6C8
103
12K
6R36
2
3
6R28
15K
6R43
6R61
100K
10K
6R12
820
3
2
6R21
12K
1
IC2
4558
-14dB
47U/16V
6C21
6VR7
10KB
8
47U/16V
6C17
6VR4
10KB
Mid
333
6C4
103
6VR1
50KB
6VR3
50KB
6C10
Bass
6R20
1K
6C6
222
6R39
22K
333
6C14
6C9
103
6R26
4.7K
Level
6VR2
50KB
6R62
6C11
103
472
15K
12K
6R19
6C2100P
4
IC3
4558
-13dB
7
6
5
6
5
6R27
15K6C12
6R20
12K
-14dB
47U/16V
7
IC2
4
4558
6C20
6VR7
10KB
47U/16V
6C16
6VR4
10KB
Mon
10K
6C42
6R13
100K
6R9
820
6
5
Treble
6R51
6.8K
7
IC4
4558
47U/16V
6C23
-13dB
6R40
4.7K
6
5
4
47U/16V
8
+2dB
6C22
1
IC1
47U/16V
4558
6R11
4.7K
+2dB
6C8
7
IC1
6R10
4.7K
4558
47U/16V
47U/16V
6C18
6R4
100
4
6R45
10K
6R44
10K
6R47
4.7K
6R49
4.7K
10K
6R48
10K
6R50
-5dB
Fx
6R46
10K
6VR5
10KB
10KB
6VR6
Pan
6JP3
JP7X2
L
R
EFF
MON
NC
NC
NC
NC
GND
GND
GND
+15V
NC
-15V
Laney
CD850S Stereo Input Circuit
12/05/2003
SK.8.A97.096
Page 4
JACK1
FOOT S/W
+15V
+5V
+48V
-15V
GND
GND
OUT
GND
9JP6
JP7X2
NC
NC
NC
NC
IN
L OUT
R OUT
9D10 LED
Power Led
9JP5
JP6
9JP1
JP2
9R25
10K
-15V
+48V
+15V
GND
GND
GND
NC
9R22
10K
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
5.6K
22P
9C16
9R14
12K
100
7
9IC2
4558
9C5
9R13
47U/16V
-12dB(MIC)
6
5
472
9R24
10K
9JK2
9R30
10K
FX
Send
9R29
12K
FX
Return
8
9C1
3
47U/16V
2
9R2
9R4
2.2K
100K
9VR1
B10K
Level
9JK1
RETURN
9C9
47U/16V
9R16
3.3K
FX
9VR1
B10K
Level
9C2
5
47U/16V
6
4
9R6
9R3
2.2K
100K
OUT
NC
OUT
IN
GND
IN
+5V
GND
9R15
3.3K
9C8
47U/16V
JP5
9JP2
JP2
9JP4
JP9
9C15
104
K1
K2
K3
K4
A
B
C
D
K
9D1
9D2
9D3
4148
4148
4148
9VR2
9VR3
9D9
4148
9D6
4148
9D7
4148
4148
9D8
9D4
4148
9D5
4148
9R17
100
Laney
CD850S Fx Control Circuit
12/05/2003
SK.8.A97.101 SK.8.A97.107
9C6
47U/16V
Page 5
Laney
CD850S FX control Circuit
26/6/3
SK18.A97.101 SK18.A97.107
fitted to units after Jan 2003
Page 6
Tape/Aux
Input
RCA
-15dB
RCA
4JP2
JP3
Laney
-15dB
4R6
4.7K
4R5
4.7K
47U/16V
4R3
22K
4R4
22K
4C5
4R14
22K
Power
LED
4R8
100
47U/16V
4C8
100P
4C2
4R11
-8dB
10K
4R10
10K
10K
4R15
4JP1
JP3
1
4IC10
4558
4C1
100P
7
4IC10
4558
100P
4C3
7
4IC9
4558
47U/16V
4C10
-8dB
47U/16V
4C7
47U/16V4C12
4C11
4R13
10K
9VR1
10KB
Tape/Aux
Level
4R12
10K
9VR1
10KB
4R16
10K
4JP3
JP3
VR IN
GND
VR OUT
8
2
3
4
2
8
47U/16V
3
4C647U/16V
6
5
4
6
5
-25dB(-10dB,MIC,-42dB) -18dB(-10dB,MIC)
L
GND
R
22K
4R17
100P
4C4
1
4IC9
4558
-15V
+15V
GND
GND
NC
R
L
NC
R
L
NC
NC
NC
NC
4JP6
JP2
4JP8
JP7 , JP8
4C13
47U/16V
VR
10KB
4JP9
JP7X4
Mon
Level
4R21
100
6¡£8K
4R22
NC
GND
GND
GND
+15V
NC
-15V
Mon
Out
GND
4JP6
JP2
LIN
GND
RIN
GND
47/0.5W
4R45
4JP3
JP5
JP2
4JP7
4R47
47/0.5W
4C20
47U/16V
4R40
12K
4R38
1K
Headphone
Level
4R39
1K
4R41
12K
4C22
47U/16V
9VR2
10KB
9VR2
10KB
+1.4V
4C17
2.2U.50V
+1.4V
4C16
2.2U/50V
4C9
47U/16V
100
4R7
2
3
186
3
2
4
186
3
2
4
6
5
8
7
7
4148
Text
4
4148
4D13
4R23
10K
4R43
22K
1
4IC3
4558
10K
4R51
5
4IC7
LM386
5
4IC8
LM386
4D12
7
4IC3
4558
4D44
22K
4D14
4148
220U/10V
4C15
4R2
10
4C23
473
220U/10V
4C14
4D11
4148
47/0.5W
4R49
4R48
47/0.5W
4R1
10
4C24
473
4C21
2.2U/50V
4C19
2.2U/50V
47/0.5W
4R46
4C18
220U/16V
+8dB
+8dB
Headphone
Out
CK6.3
9JK2
6.8K
4R31
4R28
4R27
4R26
4R24
4R42
6.8K
4R34
820
4R33
470
4R32
330
4R35
150
4R36
100
4R30
820
470
330
150
100
4
2
3
8
4
2
3
8
6
5
6
5
4
2
3
8
6
5
4
21
3
8
67
5
4
21
3
67
5
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
4D10
LED
4D9
LED
4D8
LED
4D7
LED
4D6
LED
4R29
2.7K
4D5
LED
4D4
LED
4D3
LED
4D2
LED
4D1
LED
4R25
2.7K
Left
Meter
Right
Meter
CD850S Meter / Tape input Circuit
12/05/2003
SK.8.A97.102
Page 7
-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
683
100K
4
8IC5
4558
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
8C45
7
8IC9
47U/16V
4558
-18dB(-42dB,MIC)
1K
6R2
8C1
8C31
8R3
683
1U/50V
100K
8JP4
JP4 3
2
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
8R55
2.2K
8R52
100K
1K
8R4
8C29
8C3
8R7
334
273
100K
1K
8R26
2
3
8C6
1
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
1
8C13
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
8
6
5
-18dB(-42dB,MIC)
47P
8C28
10K
8R54
7
8IC10
4558
8C35
220U/16V
47U/16V
8C42
8JP5
JP4
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
CD850S 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
8C2147P
8R13
10K
8IC1
JRC4558
8C34
47UU/25V
8R10
220
VR6
100K
8JP8
JP2
VR7
100K
JK
MON OUT
Page 8
+56V
R21
1K
R23
430
R16
300
Q5
B649
Q7
D669
Q6
D669
R17
300
R25
100
R24
100
D1
4007
5551
5401
Q10
Q9
D2
4007
C8
333
C10
103
C7
333
R30
300
R29
300
D4
4148
103
4148
C9
D3
Q11
C5198
R28
6.8K
6.8K
R27
R32
47/0.5W
R31
47/0.5W
Q8
A1941
Q12
C5200
R34
10
R42
10
R33
0.33/5W
0.33/5W
R39
Q14
A1943
R36
10
R47
10
Q13
C5200
R35
0.33/5W
.47/5W
R44
Q17
A1943
4007
D5
D6
4007
L1
3uH
10/1W
473/100V
R46
C13
R9
R7
4.7K
D669
R1
470
4.7U/16V
JP1
JP3
C1
VD1
40V
R4
30K
3.3K
Q2
R13
30
R11
3.3K
R15
30
Q4
D669
R19
470
C2
683/100V
C5
39P/250V
R22
36K
R20
Q3
B649
R18
470
1K
C3
47U/63V
39P/250V
C6
683/100V
C4
R14
R5
40V
30K
R6
4.7K
R3
IN
47K
R2
470
VD2
R12
30
Q1
B649
R8
3.3K
30
R10
3.3K
F3
0.5A
JP2--2
220VAC
10A
FUSE1
C1
472/250V
250V 10A
K1-1
K1-2
POWER SW
B1-4
B1-1
16V*2
B1-2
42V
JP2--1
0.5A
F1
0.5A
F2
2A
F4
12V AC
2A/100V
KBPC04
B1-3
42V AC*2
Laney
800VA 42VAC
CD850S Power Amp Circuit
12/05/2003
SK.8.A97.99
SK.8.A97.104
SK.8.A97.105
SK.8.A97.106
JP2--3
JP2--4
1000U/63V
C5
KBP3504
CA
223/400V
C1
104
100U/25V
KBP04
C21
C6
2200U/25V
2A 100V
KBP04
2A 100V
C19
JP4--1,2
35A 400V
JP4--7,8
JP4--3,4,5,6
2
1
2200U/25V
13
2
104
C2
C18
C13
104
104
1
2
C10
7812
N2
1
2
100U/16V
104
C22
C16
1000U/25V
2
13
7805
N3
C21
10000U/63V
C31
10000U/63V
IC3
7815
3
IC1
7815
3
IC2
7915
3
100U/16V
C28
100U/25V
C8
100U/25V
C17
104
C23
C30
104
JP6
VCC
JP6
+12V
JP7
-15V
+15V
GND
GND
+15V
+48V
JP3
JP8
GND
+5V
+56V
C25
104
C26
104
-56V
R1
1K
N1
2SC2073
C9
100U/50V
+12V
JP3
VCC OUT
D1
C4
104
C3
104
48V
100U/63V
C12
470U/16V
470U/16V
C11
104
C14
C15
JP5
VCC OUT
R45
22K
R52
12K
Q18
R51
120
R50
3.3K
C1815
Q19
C1815
-56V
R53
8.2K
A1015
Q20
R49
5.6K
R48
270K
D8
4148
C11
104
C12
47U/16V
JP2 RT
C1815
Q16
Relay
Coil
D7
4007
12V JDC
Q15
D669
Text
Text
JK1
JP4
SP OUT
8ohm/4ohn
SPEAKER
JACK1
SP OUT
JACK2
SP OUT
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