Laney LG-35-R Schematic
LG35R
Service InformationService Information
www.laney.co.uk
1
2
3
4
5
6
7
8
MJACK
G
SK1
A A
GG
Input
B B
47P 50V
+15V
D1
1N4148
R1
10K
C1
G
-15V
D2
1N4148
R3
4K7
G
+15V
U1A
TL072
-15V
R2
22K
C2
270P 250V
C3
220N 63V
FootSwitch
G
100N 63V
100KA6S
SK4
SJACK
2P2WPS
R5
100K
CD4069UBE
C4
22N 100V
C6
+5V
R4
1 2
U4A
150K
G
100N 63V
VR1A
100KA6SD
Clean Channel Volume
C33
1N 100V
VR7
G
-15V
Channel Select
SW2A
SW2B
2P2WPS
G
C5
G
R36
10K
Drive Channel
TS1
2N3819
R6
100K
D3
1N4148
G
Drive On
R37
1K
D5
3V9 ZD0.5W
G
C7
100N 63V
-15V
R8
47K
R7
D6
LED3MMG
R39
2K2
TS3
BC307
G
47K
4N7 100V
C8
3 4
R9
1M
U4B
CD4069UBE
R11
G
100K
R38
470K
C31
100N 63V
C9
100N 63V
VR1B
100KA6SD
G
-15V
G
R41
10K
TS4
BC307
5 6
R10
22K
C10
220N 63V
R8
R42
R11
1M
U4C
CD4069UBE
R43
33K
G
47N 100V
C12
C32
100N 63V
TS5
2N3819
R12
100K
2N2 100V
C13
D7
1N4148
R13
100K
C14
47P 50V
R14
1M
U4D
9 8
CD4069UBE
C15
R15
100K
22N 100V
C16
47P 50V
G
Master Volume
G
100KA6S
VR2
G G
R20
C18
C17
22N 100V
R18
10K
R29
1K
R30
39K
G
R28
TL072
G
15K
47N 100V
U3B
U2
R21
10K
+15V
U3A
-15V
22K
C25
270pF
C26
22nF
C23
R27
100R
G
Max On/Off
SW1A
2P2WPS
R26
100K
TO REVERB
HD1
12
HD2WL
R23
100K
HD2
12
HD2WL
1N4148
TS2
2N3819
D4
GG
22N 100V
+15V
R19
U2A
4K7
TL072
-15V
R17
10K
R16
10K
G
C20
47P 50V
R24
100K
U1B
TL072
G
TL072
R31
C27
C28
22K
4.7nF
G
2.2nF
G
R32
10K
R33
1K
C29
1uF
G
C21
3N3 50V
Treble
R25
VR3
R26
3K3
22KB6S
G
Bass
VR4
100KA6S
VR5
2K2B6S
Mid
G
VR6
4K7B
R35
100K
33K
C22
220N 63V
220N 63V
C23
C24
100N 63V
R34
C30
U3B
1K
100N 63V
REVERB MODELS ONLY
-
12
+
Int Loudspeaker
Revision:
Sheet ofTime:
SK3
SJACK
Headphones
SK2
MJACK
External Loudspeaker
SteelPark Road
Coombs Wood
Industrial Estate West
Halesowen
1
1
UK
www.laney.co.uk
7
8
C C
SK5
PHONOSTV
CD/Line In
Mains In
IEC Inlet
G
G
Green/Yellow
Chassis
Power Led
+21V
-21V
G
R54
4K7
-21V
C44
2200U 25V
G
C45
2200U 25V
D14
LED3MMR
D12 1N4007
D10 1N4007
10N 100V C43
D11 1N4007
D13 1N4007
These items not on pcb
HD4
123
HD3WL
G
MAINS TRANSF ORMER
115V = T500mA L
230V = T250mA L
AC Line(Live)
Transformer Primary
AC Input (Neutral)
(Fuse integral to IEC inlet
Mains Switch
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
White (Blue)
+5V
C48
470U 16V
G
C47
47U 50V
G
C46
47U 50V
D D
-15V
D17
5V1 ZD0.5W
G
R57
1K
+15V
-15V2
+15V
R55
FP
100R 2W5FP
D15
15V ZD1.3W
15V ZD1.3W
D16
R56
FP
Value: 100R 2W5FP
+21V
R44
Top
Bot
D8
C35
1N4148
22K
D9
-21V
1N4148
1U 63V
1N 100V
C36
G
10U 50V
R45
22K
+21V
U5
TDA2050
-21V
R42
C39
10K
R48
1K
R47
100R
G
30W GUITAR AMPLIFIER
Title:
Size: Number:
A3
Date:
16/05/2006 14:54:12
Original File:
1
2
3
4
5
C42
R52
470R
G
47N 100V
C38
-21V
G
G
G
220N 63V
C37
220N 63V
R49
47R
C40
22N 100V
G
R50
0R47 2W5
G
HD2WL
R51
4R7 2W5
C4
220N 63V
9346 4
9346_4.sch
6
R53
47R
G
HD3
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