Laney LV300 H TWIN Schematic

LV300/H/Twin

Service InformationService Information

www.laney.co.uk

1

2

3

4

5

6

7

8

MJACK

G

SK1

A A

Input

B B

BRKT1

BR16BU

C C

+15V

C1
10N 100V
R2
10KSM

C27

R4

G

1MSM

-15V

47PSM

G G

4W LOOM TO

OUTPUT/FX/LOOP

FX SEND/LINE OUT

HD4

HD10W.5

+15V -15V

C26

10
8

6
4
2

D3
BAS16

D2

9
7
5
3
1

100N 50VSM

BAS16

G

TL072SM

C29
270PSM
C2

0.47U 63V

R6
4K7SM

G

GG

100N 50VSM

R5
22KSM

C25

U2B

DRIVE1

VR5

C8

100KA6S

R66
22KSM

22N 100V

C12

R71
2K2SM

100N 63V

Clean Channel

C3

270PSM

Treble

VR4

R10
100KSM

220KA6S

C4

100N 63V

Bass

VR2

220KA6S

47N 100V

Mid

C5

VR3

22KB6S

G

LN2

R1
3R3 2W5

Note:

DRIVE2

VR7
100KB6S

DRIVE2FET

DRIVE1FET

G

G

Q1
SST177

R7
1MSM

C47

Programming Header

A0

123456

PTA0

A1

PTA1

PTA2/IRQ

PTA5/OSC

Clean FS A0
D1/D2 FS SW A2

D D

Clean FP A3
D1 FP A4
D2 FP A5

A2
A3

PTA3

A4

PTA4

A5

HD2

123456

+5V
+15V

-15V
G

Return
Send

HD5

1

+5V

MCU1

VDD1VSS

2

PTA5

3

PTA4
PTA34PTA2

M68HC908QT4

C33

100N 50VSM

PTA0
PTA1

100N 50VSM

8
7

G

6
5

C35

G

2

LED3MMR

LED6

LED4

LED3MMR

R16

LED5 LED3

C7

1KSM

270PSM

R14 470KSM

Q2
SST177

D1
BAS16

D4
BAS16

R8
10KSM

G

C46

10U 50V

100N 50VSM

CLEAN CHANNEL

U3B

TL072SM

G

To Tube PCB

BRIGHT ON/OFF

+15V

U2A

TL072SM

100N 50VSM

-15V

R3
47KSM

LN1

U1

LM7805

IN OUT

GND

Note:

Channel switches Non-Latching type

µC LINES = ACTIVE LO

SWITCH

DRIVE 1 SWITCH

DRIVE 2 SWITCH

G

C28

G

ITEMS WITHIN DASHED LINES
ARE ON PCB 9394

Caution High Voltage

C21
10U 400V

G

HD2WL

HD1

HD2

12 1

12

G

R21

SW1A
4P2WPSPB

COA

+5V

GGG

SW1C
4P2WPSPB

SW2C
4P2WPSPB

SW3C
4P2WPSPB

3

C44

G

C31

C40
100N 50VSM

+5V

+5V

R59
10KSM

+5V

R64
10KSM

68K 0.5W

C45

G

330N 63V

C30
470PSM
470PSM

+5V

R60
10KSM

R73
10KSM

R72
10KSM

R74
10KSM

G

330N 63V

R56
100KSM

HD2WLSJ

VR1
100KA6S

CLEAN VOLUME

G

C18
10U 50V

COC

G

COC

G

COC

G

R17
2K2SM

+15V

G

R40
47K SM

G

+15V

G

R68
22KSM

TS1
BC847B

+15V

TS3
BC847B

G

R22
100K 0.5W

22N 400V

C13

V1A
ECC83

R24
470K

LED3MMR

R57
100KSM

C43
100N 50VSM

R69
22KSM

TS2
BC847B

3 4

R70
22KSM

R25
470K

G

D7

LED5

1N4007

R62
1K

+15V

1 2

G

CD4069UBE
U7B

CD4069UBE

5 6

C1

R26
820RSM

G

Q8
SST177

G

CD4069UBE
U7A

U7C

R27

10K 5W
R23
100K 0.5W

470P 1KV

V1B

ECC83

VR10
1KH

G

HUM TRIM

VIBE ON/OFF

R55
2K2SM

2P2WPS
SW4A

MUTE

Clean Active

R44
150K SM

R43
150K SM

R42
150K SM

100N 50VSM

R28

10K 5W
C22
10U 400V

G

TO PREAMP

HD3

12

HD2WL

G

SPADE4.8

F2
POLYSW0.9

SPADE4.8

G

U7F

13 12

CD4069UBE

C39
100N 50VSM

G

U7E

11 10

CD4069UBE

C38

100N 50VSM

G

U7D

9 8

CD4069UBE

C37

G

4

Replace only w ith same type and rating

4N7 1000V

4N7 1000V

4N7 1000V

4N7 1000V

4x

1N4007D41N4007

1N4007

1N4007

D3

C24

G

SP3

SP4

R65
4K7SM

R53
4K7 SM

R9
3K3SM

CLEANFET

10U 400V

HD3

HD2WLSJ

G

R11
3K3SM

R21
3K3SM

DRIVE2FET

C23

121

R54
100KSM

Drive 1 Active

C25

G

C20

G

4N7 100V

R45
3K3SM

C15

220N 63V

220N 63V

C17

-15V

U6A

C24

TL072SM

330N 63V

+15V

LED3MMGHB

LED1

G

LED3MMRHB

LED2

G

DRIVE1FET

Drive 2 Active

LED3MMRHB

LED7

G

C26

D5

D6

C27

Treble

VR11

22KB6S

Bass

VR9

100KA6S

VR10

2K2B6S

Mid

G

4N7 100V

R51

10KSM

C21
1N 100V

G

C23

R48
10KSM

F1
FUSEIN

R75
100KSM

G

5

T100mA L

SPADE4.8

SP1

To Transformer

SP2

SPADE4.8

TL072SM

R67
22KSM

R58
10KSM

G

R49
10KSM

C41

33KSM

100PSM

TL072SM

U6B

G

U4B

330N 63V

C22

R52

C42

R50
10KSM

C19

1N 100V

100N 63V

SW2A
4P2WPSPB

COA

G

R12
2K2SM

R24
1KSM

R20

100KSM

G

SW3A
4P2WPSPB

COA

G

R23
2K2SM

R27
1KSM

R22

100KSM

G

R47
4K7SM

R46
6K8SM

2U2 63V

Title:
Size: Number:
Date:
Original File:

Drive1 Scoop ON/OFF

R13

G

39KSM

G

22N 100V

R19

C9

15KSM

+15V

U3A

C6

22N 100V

R18
4K7SM

R17
10KSM

TL072SM

-15V

R15
15KSM

C10

100N 63V

100KA6S

VR6

Drive 1 Volume

G

Drive2 Scoop ON/OFF

R25

G

39KSM

G

22N 100V

R30

C13

15KSM

+15V

U4A

C11

R29
4K7SM

22N 100V

R28
10KSM

C32

47PSM

R31
10KSM

U5B

C16

TL072SM

C14

TL072SM

100N 63V

Drive 2 Volume

100KA6S

-15V

R26
15KSM

G

VR8

R37
47KSM

G

R35
10KSM

Q4

C45

SST177

1U 10VSM

R76

100KSM

G

NOTE: 65W MODEL = Fit R1 + U1. Miss out LN1+LN2
NOTE: 120W MODEL = Fit LN1+LN2. Miss out R1 + U1
NOTE: All resistors to be 1/4W unless otherwise stated
NOTE: All capacitors to be rated at 16V or higher, unless stated

Q6
SST177

R39
100KSM

G

CLEANFET

Q9
SST177

TUBE HYBRID GUITAR PREAMP

A3

9402 2

17/05/2006 09:34:37

9402_2.sch

6

Revision:

Sheet ofTime:

1

Reverb Send

Q3

R33

SST177

47KSM

DRIVE1FET

Q5
SST177

DRIVE2FET

Q7
SST177

C48

1U 10VSM

1U 10VSM

C49

R62
100KSM

G

SteelPark Road
Coombs Wood
Industrial Estate West
Halesowen

1

UK
www.laney.co.uk

7

Send

100N 63V

C34

47PSM
R32

220KSM

100N 50VSM

-15V

C44

TL072SM

R34

+15V

1MSM

G

G

CLEANFET

Clean Reverb Level

VR12

R38

22KB6S

10K SM

G

VR13

R61

22KB6S

10K SM

G

Drive Reverb Level

Footswitch

C36

U5A

R36
2K2 SM

R41
1KSM

Return

Reverb Return

8

1

4W FOOTSWITCH INTERFAC E

Gc

+5V

5

C24

C25

A A

Chassis GND

FX2
DRIVE2
CLEAN

HD2

1

2

3

4

5

6

7

8

Gc

9

10

HD10W

B B

HD10W

HD1

FX1

DRIVE1

0R0

LN1

9

10

7

8

G

5

6

3

4

1

2

-15V+15V

1

69

C26

C27

Items within dashed
Lines are on a seperate
Crack-off pcb

TO PREAMP/FX/LOOP

C C

SK6
DB09M

C28

2

C29

C30

Gi2

SK3
MJACK

Gi2

SK2
MJACKG

Gi2

C22

R3
1K

10uF

FX SEND

FX RETURN

RLY1B
RLY1C

Gi2

2P2W1A

2P2W1A
R13
22K

Gi2 Gi2

+5V

R27
22K

Gi2

3

C19
100nF

G

C1

2.2uF

D2
3V9 0.5W
D1

Gi2

3V9 0.5W

~8V TO 5VDC SUPPLY
PCB 9397 SP5/SP7

U1 LM7805

C20
10uF

R12
22K

R31
100K

OFFSET ADJ

1nF

10K
R4

C2

Gi2

Gi2

C23
100uF

LN2
0R0

G

GND

INOUT

R30
1K

TS8
MPSA42

R1

100R

D4

1N4007

TS1
MPSA92

VR11K

220R
R7

470uF
C21

RLY1A
2P2W1A

TS12
MPSA42

R9
100R

TS2
MPSA92

R2
100R

10uF

R8
1K

BR4

+V

-V

1.5A 200V

C6

TS3
MPSA92

G

4

AC

AC

150R
R6

C3
47uF

100pF

C4

TS4
MPSA92

-45V2

0R0
LN5

C5
100nF

1N4007

100K
R5

D10

D14 D15 D11

2K2

R10

R16

220R

TS5
MPSA42

LN3
0R0

R15

10K

-45V2

LN4
0R0

C7
47pF

F1
POLYSW0.9

0R0
LN8

BLT005103
MFR-090

220R
R11

TS6
MPSA92

1N4148
D3

TS9
MPSA42

TS10
MPSA92

D7
1N4148

5

SP5

SPADE4.8

SP7

SPADE4.8

8V~

C11

2.2uF

100nF

C10

R17

330R

R18

6K8

R19

6K8

R20

330R

100nF

C13

D6 1N4148

D8
1N4148

G

G

6

TESTPOINT PIN

TestPoint1

R22

220R

BIAS ADJ

TestPoint2

TESTPOINT PIN

0R0

LN9

7

G

1K 1K 1K 1K

CLEAN DRIVE1 DRIVE2 FX

G

D5
1N4007

D9
1N4007

4W FOOTSWITCH WIRING

R24
10R 2W5

L1
COIL20T

C16
47nF

R23
10R 2W5

G

R28
220R

SP4

SP6

G

Internal Loudspeaker

SPADE4.8

SPADE4.8

R29

0R22 5W

5

VR2
470R

69

TS7
SAP16N

R14

0R22 5W

R21

0R22 5W

SAP16P
TS11

1

+45V

-45V

8

+5V

Extension Loudspeaker

SK4
MJACK

Head Versi o n Only!

MAINS FUSE 230V =T2A L, 115V = T5A L

Mains In

IEC Inlet

Green/Yellow

D D

Flame proof resister

FP

Must only be replaced with same type and rating

Indicates safety critical component
Must only be replaced with approved type

Black(Brown)

Fuse Integral to IEC

White (Blue)

Chassis Transformer Primary

Mains Transformer
230V = 5600-2062B

120V = 5600-2064B

1

Fuse

Mains Switch

AC Line(Live)

AC Input (Neutral)

MAINS TRANSFORMER

NOTE:
Set VR2 to give 20mV across TP1 and TP2

Refer to service manual before adjusting bias preset
Set VR1 to give 0mV across LS+, LS-

2

~200V TO TUBE
PCB 9394 SP3/SP4

~12V TO TUBE
PCB 9394 SP1/SP2

These items not on pcb

3

SP3

SPADE4.8
SP1

SPADE4.8
SP2

SPADE4.8

+45V

C9

BR1

+V

220nF

G

C15

AC

AC

-V

6A 200V

G

-45V

Title:
Size: Number:
Date:
Original File:

4

5

100nF

4700uF

C14

100nF

C12

C8

4700uF

-45V2

120W GUITAR OUTPUT MODULE

A3
17/05/2006 09:39:21

9397_6.Sch

R26

680R 5W

C17

D12

470uF

15V 1.3W

C18

D13

470uF

680R 5W

R25

9397 5

15V 1.3W

Revision:

1

Sheet ofTime:

6

+15V

G

-15V

Steelpark Road
Coombs Wood
Industrial Estate West
Halesowen

1

UK
www.laney.co.uk

7

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8