Laney MXD65 Schematic

MXD65

Service InformationService Information

Laney

Classic British Amplification

Newlyn Road, Cradley Heath, West Midlands. B64 6B£

www.laney.co.uk

1

MJACK

G

SK1

GG

A A

B B

Input

C4
4N7 1 00V
R1
10K

R2
1M

G G

+15V

C2

-15V

47P 50V

D1
1N41 48

D2

1N4148

C7

G

+15v

TL072

-15V

R4

C6
270P 250 V

2U2 6 3V
R6

4K7

U1A

22K

FootSwitch

2

0R0

C9

R21

LN1

150K

10N 1 00V

SK3
SJACK

G

AA

R19
100K

CD4069UBE

VDD

147

1 2

U2A

G

Clean Channel

C12

3N3 5 0V

Treble

VR4

R9
10K

22KB6S

C14

220N 63 V

Bass

VR2

100K A6S

220N 63 V

Mid

C13

VR3

C10

100N 63 V

2K2B6S

G

100N 63V

C19

100K A6SD

LN2
0R0

G

VR5A

1N41 48

G

Drive Channel

R8
100K

Hard wire on top side of pcb

-15V

R16
10K

SW1A
2P2WPS

G

SW1B
2P2WPS

G

Channel Select

3

Q2
2N38 19

D7

TL072

R3
10K

G

Drive On

R13
1K

D4
3V9 Z D0. 5W

R18
100K

G

R5
33K

C17

10N 100V

U1B

-15V

G

R20

47K

C8

100N 63 V

D5
LED3MMG

R15
2K2

TS2
BC307

R24
1M

U2B

3 4

CD4069UBE

VR1
100K A6S

G

R14

G

100K

R12
470K

G

C5
1N 10 0V

C15
100N 63V

C20
100N 63 V

VR5 B
100K A6SD

-15V

G

4

R11
10K

TS1
BC307

U2C

5 6

R22
47K

CD4069UBE

C18
100N 63V

R10
100K

R25
1M

22N 100V

R7
220K

C11
100N 63 V

G

5

C21

47P 50V

R23
1M

U2D

C22

R26
220K

Q1
2N38 19

9 8

CD4069UBE

D3
1N41 48

LN7
0R0

R36
3K3

220N 63V

220N 63V

C28
C31

100N 63V

LN3
0R0

C32

3N3 5 0V

C23

Treble

G

VR9

22KB6S

Bass

VR7
100K A6S

VR8

2K2B6S

Mid

+15V

TL072

-15V

R33

10K
SW2B

R35
10K

G

6

R29
10K

U3A

2P2WPS

Max On/Off

R28
6K8

2P2WPS
SW2A

100N 63V C25

R34
10K

G G

R37
15K

C27

4N7 1 00 V

R30
15K

TL072

R32
10K

1N 10 0V

U3B

C26

100K A6S

VR6

Master Volume

R31
22K

C24
47N 100V

LN6
0R0

G

R27
220K

7

Tape/CD In

SK2

G

G

PHONOSTV

Q3

2N38 19

D8

1N41 48

LN5

Top

Bot

0R0

R43
22K

R46
22K

R48
10K

G

R38
220K

LN8
0R0

TL072

G

FXSEND

FXRETURN

DSP Level

8

R52
100K

D10
1N41 48

R40
100K

100K

LN12
0R0

D9
1N41 48

LN15
0R0

C30

47P 50V
R39

100K

U4B

TL072

LN9
0R0

G

R41

+15V -15V

C29

47P 50V

-15V

U4A

+15V

R50
1K

VR1 0
22KB6S

G

LN14

C C

TO OUTPUT PCB

9353/9391

Programming He ader

HD2

123456

PTA0
PTA1

PTA2/IRQ

PTA3
PTA4

D D

PTA5/OSC

FX Return
FX Send

123456

+5VDSP

-15V
G

HD1

1

DSP Program Select

SW3
16PGRY

1
2
3
4

C

FXRETURN

FXSEND

+15V

G

LN16
0R0

NOTE:

2

HD6WL

HD3

123456

R44

R45

R51
330R 5W

LN10
0R0

C38
10U 5 0V

G

15V Z D1. 3W

560R 5W

560R 5W

15V Z D1. 3W

+15VDSP

15V Z D1. 3W

G

D11

D14

G G

D12

G G

IN OUT

GND

G

U5
7805

LN11
0R0

C36
47U 5 0V

C37
47U 5 0V

G

C3

-15V

100N 63V

C1
100N 63 V

G

+5VDSP

C33

C34
100N 63 V

10U 5 0V

3

+15V

+15V

R17
1K

G

D6
5V1 Z D0. 5W

4

VDD

G

C16
470U 16 V

-15V

R49
4K7

D13
LED3MMR

Power

G

Line Out

G

SK4
MJACK

C35

R47
100K

R42
1K

6

G

2U2 6 3V

G

5

0R0

NOTE: MXD65 / R51 = 270R
NOTE: MXD120 / R51 = 330R

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

Title

MXD65 / MXD120 PREAMP

Number Revis ionSize

A3

Date: 14/1 0/2 003 Sheet of
File: C:\D ocu ments and Sett in gs\..\9387_6 .Sch Drawn By:

9387 6

7

119387_6.Sch

Rich Thompson

8

7654321

Note:
HCM65B, R4=47R, C3=2µ2F
HCM65R, R4=2K2, C3=10nF

R4

2K2

C3
10N 100V

BS

U1

14

6

C9
100N 100V

G

G

+28V

C2
22UF 50V

-28V

G

D

+28V-28V

HD1

123456

To Preamp PCB

HD6WL

C

C6

Gi

1U 63V

Gmu

R14

10K
C7
100U 25V

Gi

R12

47K

D1

1N4148

R11

C5

4K7

4U7 63V

Gi

R2

1K

R13
10K

R15
22K

R1

100R

C8
470P 250V

Gi

LN8
0R0

C1

47U 50V

Gi

Gi

2
3
4

9

10

1

-IN
+IN

GIN

STBY
MUTE
MSGND

R3

10K

713
+VI +VP

TDA7294

-VI -VP

OUT

C10
100N 100V

Fit on HCM65R Only

R6

47R

R8
0R47 5WFPC

G

R9
100K

R10

470R 0.5W

HCM65B Only

R17
10R 2W5

G

G

C11
100N 100V

R7

C4

47R

47N 100V

G

To Loudspeaker -V

External Loudspeaker

MJACK

SK2

To Loudspeaker +V

SP2
SPADE4.8

SP1
SPADE4.8

SK1
SJACK

8

HeadPhones

LN1

Fit on HCM65B Only

0R0

G

D

C

R5
1K

D2
1N4007

B

Mains In

IEC Inlet

Green/Yellow

Chassis

A

Flame proof resister

FP

Must only be replaced with same type and rating

Indicates safety critical component
Must only be replaced with approved type

h1

h2

h8

hs1

1 2 3 4 5 6 78

230V = F1A L
115V = T2A L

Brown

F1

FUSE

Fuse Integral to IEC

Blue

Mains Switch

AC Line(Live) (White)

Transformer Primary

AC Input (Neutral) (Black)

These items not on pcb

TX

(Red)

(Black)

(Red)

TRANS4

No:5600-003147

P7
PAD3
P8
PAD3
P9
PAD3

D3

1N5404
D4

1N5404

D5

1N5404
D6

1N5404

C13
3300U 50V

G
C14
3300U 50V

+28V

-28V

Link to chassis

LN2

LN3

LN4

0R0

0R0

0R0

Chassis

Title

BLT

Industries

Date: 15-May-2003 Sheet of
File: E:\PCB\Protel PCBS\9353_2.ddb Drawn By:

LN10
0R0

Gi

LN5
0R0

65W Output PCB

Number RevisionSize

A3

LN11
0R0

Gmu

9353 2

119353_2.sch

Rich Thompson

B

A