Laney LA65C Schematic

SK4

D

Auxillary In

Guitar In

SK1
MJACK

C

4N7 100V

B

G

A

VR7
22KB6S

Paramid Gain

C19
22N 100V

R10
10K

VR10A

100KC6SD

2
3

U11A

6

NE571

1

4

C39

G

1U 63V

C31

100P 100V

R19

22K

R20

22K

R21
4K7

LED2
LED3MMR

100KC6SD

R11

10K

Spring Reverb

HD2

12

HD2WL

G4

LN17

G

8

7

5

U4B

Paramid Frequency

LN3

U5B

R76

100R

+15V2

U5A

R77

100R

-15V3
R72

47K

270P 250V
C25

R75
22K

G

C85

10U 50V

C86

10U 50V

R37
100K

-15V3

G G

Power

G

Flame proof resister

FP

Must only be replaced with same type and rating

Indicates safety critical component
Must only be replaced with approved type

R12
10K

G

C32

VR10B

10N 100V

+15V

LN8

TL072

10K
R13

HD3

12

HD2WL

HD4

12

HD2WL
HD5

12

HD2WL

FIT IF REQUIRED

OPTIONAL HEADERS

C59
47P 50V

G

C52

LN23

2U2 63V

R24

22K

+15V2

D2

1N4148

1N4148
D3

G

-15V3

-15V

G3

R35

10K

C83

10P 50V
R38

22K

-15V3

TL072

+15V2

U7A

U10A

C61

10U 50V

R73
22K

G3

G3

BLT

BLT

Industries

Industries

R29
100K

G

C43

4N7 100V

G3

LN14

R15

10K

C35

47P 50V

R14

10K

TL072

GG

LN4

G

U10B

TL072

R74

22K
C45

R43

2N2 100V

1K

C40
1U 63V

C7

10U 50V

Master Volume

Title

A3

Date: 15-Apr-2002 Sheet of
File: E:\PCB\Protel PCBS\9363_4.ddb Drawn By:

R48

4K7

C13

10P 50V

-15V

TL072

G

+15V

9

10

C26

270P 250V

C42
1U 63V

Ga

Chorus Depth

R25

10K

VR1

Volume CH1

100KA6S

C11

10P 50V

LN1

TL072

U1B

LN16

G

LN33

U2A

+9V

C38

220N 63V

VR14

10KH

R82
47K

CHORUS BIAS

1N 100V

VR2

100KA6S

+9V

G

R52
2K2

LED1
LED3MMY

CHORUS RATE LED

TS1
MPSA42

D6
5V1 ZD0.5W

COB

SW2B

COD

SW2D

LN2

C5

10U 50V

CLOCK TEST

R47
3K3

Gb

C56

R90

330K

C4

10U 50V

R58

4K7

Gb

R32
100K

C57

4U7 63V

Gb

C6

10U 50V

C14

22N 100V

Bass

U12

U13

Gb

LN26

G

G

Ga

G G

+15V

-15V

1N4148
D13

D4

1N4148

G

C50

2U2 63V

47U 50V

D1
1N4148

D12
1N4148

TL072

R57
10K

C60
2U2 63V

C54

R45
3K3

TL072

U2B

R67

33K

100P 100V

Ga

TL072

47U 50V

C10
10P 50V

+15V

-15V

R46

3K3

C9

10P 50V

C29

C41

1U 63V

U8B

C55

U1A

R49

4K7

15
14
11
16

D5

1N4148

C87

10U 50V

Volume CH2

VR8
22KB6S

C51

2U2 63V

+15V

13

U11B
NE571

12

R81
47K

C53

47U 50V

Mic

G

12

3

G

G

R23

10KR36K8

C44

G G

R78

680K

+15V

TL072

-15V

R1
100K

G

G

R2
100K

G
SK3
MJACK

R16

10K

10N 100V

C34

C2

10U 50V

C1

10U 50V

R26
100K

G

10N 100V

C33

C12

10P 50V

Ga

LN22

G

C3

10U 50V

G

R66

6K8

100P 100V

TL072

1N 100V

G

C30

R39

1K

C8

R40

1K

R6

10K

+15V

R65
1M

-15V

U9B

R79

470K

L.F.O

VR12

G

U8A

100KC6S

R87

3K3

Chorus Rate

1 2 3 4 5 6 78

R53

4K7

Treble

VR3
22KB6S

VR9
22KB6S

R36
100K

G

C15

22N 100V

R54
4K7

R17
10K

C22

47N 100V

BL3207

CD4046

LN30

-15V2

+15V2

Treble

VR4

C18

22KB6S

R55
4K7

R7
10K

Bass

VR5
22KB6S

C21

47N 100V

C17

22N 100V

R59

4K7

R60 4K7

R61 4K7

+9V

+9V

C70
100N 63V

LN34

Gb

0R0

R50
2K2

+9V

Gb

R80
470K

G1

C36
47U 50V

LN19

C37
47U 50V

G1

NOTE: All resistors to be 1/4W unless otherwise stated
NOTE: All capacitors to be rated at 16V or higher

22N 100V

R56 4K7

R63
1M

G5

GG

R33
100K

G1

-15V

TL072

CH2 Chorus

R68

33K

LN35
0R0

R64

C24

1M

270P 250V

-15V

TL072

G

+15V

CH1 Reverb

COA

Wire2

COA

Wire1

Wire Pad A-B

CH1 Chorus

C23
270P 250V

-15V

U4A

LN21

+15V

LN31

CH2 Reverb

SW1C

COC

LN25

SW2C

COC

R69

33K

C46

1N 100V

G G

Clock Min Adjust

VR13
100KH

G

C302
100N 63V

LN28

-15V3
+15V +15V2

LN27

G

U3A

SW1A

10K

SW2A

10K

R30

10K

R18

10K

R22

10K

R70

33K

C47

1N 100V

C303
100N 63V

LN32

R8

R9

G

Wire3

R83

68K

220R 2W5

9V1 ZD0.5W

R27

10K

C27

270P 250V

-15V

TL072

+15V

R84

LN24

22N 100V

U9A

100N 63V

G1

C28

100P 100V

R28

10K

TL072

LN7 LN5

G5

LN6

G

TL072

LN9

TL072

R88
100K

G4

R42
1K

R71

C20

39K

G4 G4

C49

R51

2K2

Tape/CD In

SK2

Top

G

G

Bot

PHONOSTV

R34

100K

+9V

LN29

D7

C58
470U 16V

G1

7654321

C80

U7B

10U 50V

G

C48

100N 63V

R44
1K

VR11

LN13

4K7B6S

Reverb Level

G

LN11

VR6

4K7B6S

G

LA65C PREAMP

LA65C PREAMP

Number RevisionSize

9363 4

R86
100K

R31

22K

Phase Reversal

SW3A

LN12

G3
G1

LN20

LN18

R85
100K

G

+15V2-15V2

To Output PCB

HD1

FX Send
FX Return
DI

Output

12345678

HD8WL

G

119363_4.Sch

11

8

4

Rich Thompson

Rich Thompson

D

C

B

A

D

C

To Preamp PCB

B

+15V-15V

HD1

12345678

HD8WL

7654321

R31

U5B

R4
100K

TL072

R32

G

10K

G

Send

SK4
MJACK

C16

R41

1K

10U 50V

Loop Disable

LN13
0R0

G

G

SW1A
2P2WPS

G
G

G

(FX LOOP)

SK5
MJACK

Return

R55
100K

100P 100V

R33
10K

G

C3

R16

2K2

R12

47K

D1

1N4148

R11

C5

4K7

4U7 63V

R30

10K

C6

4U7 63V

Gi2

LN12

Gmu

G

TS1

MPSA42

R14

10K

C7
100U 25V

10K

TL072

-15V

+15V

+28V

U5A

R8
10K

TS2
MPSA42

C8

22UF 50V

R15
22K

R1

470R

C17
4U7 63V

Gi

G

SK6
SJACK

Gi2

DI Out

R6
100K

C1

47U 50V

+28V

R9
4K7

C10
100N 100V

U1

14

OUT

6

BS

TS3

MPSA92
D7
1N4148

C2

22UF 50V

R13
18K

Gi2

R10

470R 0.5W

47N 100V

G

47R

G

To Loudspeaker -V

SP2
SPADE4.8

SK1
SJACK

HeadPhones

R7

C4

External Loudspeaker

R17
10R 2W5

C11
100N 100V

G

MJACK

SK2

SP1
SPADE4.8

To Loudspeaker +V

G

G

R2

1K

R3

100K

+28V

713

G

+VI +VP

-IN

2

+IN

3

GIN

Gi

4

TDA7294

STBY

9

MUTE

10

MSGND

1

-VI -VP

-28V

Gi

G

C9
100N 100V

8

D

C

B

D2

R5

1N4007

D3

1N5404
D4

P7
PAD3
P8
PAD3
P9
PAD3

A

hs1

1 2 3 4 5 6 78

1N5404

D5

1N5404
D6

1N5404

LN36

1K

+28V

C13
3300U 50V

G
C14
3300U 50V

-28V

Link to chassis

LN4

LN5

0R0

0R0

Chassis

LN10

LN11

0R0

0R0

LN15

Gi2

0R0

Gmu

Gi

BLT

BLT

Industries

Industries

-28V

R54

R53

+28V

Title

LA65C OUTPUT PCB

LA65C OUTPUT PCB

Number RevisionSize

A3

Date: 15-Apr-2002 Sheet of
File: E:\PCB\Protel PCBS\9364_3.ddb Drawn By:

9364 2

15V ZD1.3W

D8

330R 5W

270R 5W

15V ZD1.3W

G G

D9

G G

C36
47U 50V

C37
47U 50V

119364_3.Sch

11

G

C302
100N 63V

C303
100N 63V

G

2

Rich Thompson

Rich Thompson

-15V

+15V

A