Laney HCM15B Schematic

87654321

Treble

VR4

C13

22KB6S

U3B

47N 100V

R27
2K2

R28
2K2

15V ZD1.3W

C22

47P 50V

R43
33K

TL072

R31
470R

Bass

VR2

22KB6S

Mid

VR3

22KB6S

+VCC -VCC2

G

Input

SK1

Hi

D

C

MJACK

G

R1
1K

C1

100P 100V

+15V

1N4148
D1

C4

10N 100V

R4

D2

1M

1N4148

G

-15V
G

G

R5
10K

C6
2U2 63V

TL072

U1B

R6
10K

C8

270P 250V

100P 100V

-15V

Compressor On

2P2WPS
SW1A

G

G

R14
4K7

C3

TS1

R9
10K

BC237

R20
3K3

D6
LED3MMG

Gain

VR1
22KB6S

R19

LN7

LN9

100P 100V

TL072

G

LN3

R22
22K

G

G

-15V

R33
100K

TS2

BC307

R2
1K

G

3K3

C2

-15V

+15V

+15V

G

U1A

Drive

CA3094

C7

2U2 63V

-15V

Comp

Sink OP

Program

+15V

R23
22K

R39
470K

G

R15
4K7

U4

Diff

470P 250V

LN1

LN2

R40
100R

G G

R10
10K

C9

R21 22K

TL072

R41
100R

R17
4K7

U2B

2P2WPS

SW1B

R24
22K

-15V2

R11
10K

TL072

+15V

G

Compressor On

1N4148

D3

D100
1N4148

Limiter On

C11

1U 63V

U3A

R7
10K

C17

47N 100V

C19
22N 100V

C23

22N 100V

D7

R34
100K

C15

R35
100K

R45
820R

R29
2K2

R8
10K

D8

15V ZD1.3W

R36
100K

22N 100V

R37
100K

R46
820R

GG

47N 100V

C14

R16
4K7

R30
2K2

D5 1N4148
D4
1N4148

470P 250V
C10

-15V2

TL072

+15V

G

R100
10K

R44

R38

68K

100K

U2A

C20

10U 50V

VOLUME

VR5

10KA6S

G

D

C

R12

C12

1U 63V

10K

C24

470P 250V

G

G

C21
10U 50V

R3

1K
R42
100R

+VCC

U5

TDA2030

-VCC2
R13

10K

G

G

-VCC

C26
220N 63V

G

R49

47R
C16
22N 100V

C25
220N 63V

R52
0R47 2W5

G

R32
470R

R47
4R7 2W5

G

C18

C27
220N 63V

G

R48

47N 100V

47R

G

PHONES

SK3
SJACK

HD1

-

1 2

+

HD2WL

SPEAKER

+15V

C28

D9
15V ZD1.3W

47U 50V

G

C29

D10

47U 50V

15V ZD1.3W

100R 2W5

LN5

-15V

-15V2

R50
100R 2W5

R51

-VCC2

LN6

+VCC

-VCC

C30
2200U 25V

C31
2200U 25V

R18
4K7

D15
LED3MMR

G

D13
1N4007

D14
1N4007

D11
1N4007

D12
1N4007

C5
10N 100V

These items not on pcb, except Fuse and Spades

HD2

PSU

G

1 2 3

HD3WL

FP

BLT

Industries

AC Line(Live)

MAINS TRANSFORMER

Flame proof resister

Must only be replaced with same type and rating

Indicates safety critical component
Must only be replaced with approved type

Mains Switch

Transformer Primary
AC Input (Neutral)

Title

HCM15B

Number RevisionSize

A3

Date: 10-Apr-2002 Sheet of
File: E:\PCB\Protel PCBS\9359_2.ddb Drawn By:

SP1

SPADE4.8

115V = T500mA L
230V = T250mA L

SP2

F1

SPADE4.8

White (Blue)

Black(Brown)

Mains In

IEC Inlet

Green/Yellow

Chassis

9359 2

1 19359_2.sch

Rich Thompson

B

A

CD INPUT

B

SK2

SJACK

R25

G

A

22K
R26

22K

1 2 3 4 5 6 7 8