Laney HCM10 Schematic

1

2

3

4

5

6

7

8

Mid

C22

1uF

+10V

-10V

VR2
100k log

G

G

D7
1N41 48

D8
1N41 48

VR4

22kl in

VR3

2k2Li n

C18
33p

Mute Line

R21
220k

G

R271kR29
1k

VR5

Volume

100k log

G

+12V

U3

+

TDA20 30

-

-12V

R19

100k
C15
2u2

R30
47k

G

+12V -12V

C19
100n

R20
1r 0.5 W

D5

C26

47n

1N40 04D61N40 04

G

R26
100r 0 .5W

Red+

T1
T8

Black-

Phones

SK3
PHONEJACK2

R24

0.1 3r 2W5

FP

G

SK1
PHONEJACK2

A A

G

B B

C C

Input

R3
10K

1N41 48
C1

100n

150p

+10V-10V

D2

C2

D1
1N41 48

U1B

TL072

R1
220k

G

G

R8
100k

C4
SW1A

R7

ca

100k

R2

C3

10k

47n

R4
2k7

G

G

470p

R5
2k7

R6
10K

G

nca
noa

Gain

nob

cb

ncb

SW1B

R11
470R

VR1
100k lin

C9
2u2

U1A

C5
2u2

-10V

TL072

+10V

R10
1M

C6

1N

1N41 48

­+

C10

R16
22k

TL072

U2B

C13

100p

R18
4k7

C8

0.47uF
R14

10n

12k

10k

R15

TL072

C14
1n

G

CD/L ine In

-10V

+

-

C23

3n3

R17

Treble

3k3

C12

220n

Bass

C16

220n

C17

100n

SK2
PHONEJACK2

G

R28

R25

3k3

3k3

+10V

U2A

C11

33nF

R13
47k

C7

R12

22uF

4k7

R9
1K

D3

D4
1N41 48

G

+12V

C20
100u F

C21
100u F

G

+10V

-10V

6

BLT

Industries

Flame proof resister

FP

Must only be replaced with same type and rating

Indicates safety critical component
Must only be replaced with approved type

Title

HCM10

Number Revis ionSize

A3

Date: 09/0 3/2 004 Sheet of
File: D:\Wo rk- in-Progress\93 49_3\934 9_ 3.Sc h Drawn By:

9349 3

119349_3.Sch

7

Rich Thompson

8

D12
1N40 04

D10

These items not on pcb

Ma i n s fuse
F250mA L (115V)

Mains In

Black(Brown)
Green/Yellow

White (Blue)

D D

1

AC Line(Live)

AC Input (Neutral)

Chassis

P1

T125mA L(230V)

F1
FUSE

Mains Switch

2

P2

Transformer Primary

T3
T2
T4

3

1N40 04

D9
1N40 04

D11
1N40 04

R31
2K2

D13
LED red

Revision Hi story

C4 FROM 150pF TO 47 0pF

4

-12V

C24
1000 uF

C25
1000 uF

FP

220r 0.5WR22

FP

220r 0.5WR23

5