Laney HCM65B Schematic
87654321
C9
R14
10K
Drive
CA3094
C7
2U2 63V
R50
47K
-15V
U3
Comp
Sink OP
Diff
Program
+15V
R38
22K
R47
470K
G
15V ZD1.3W
470P 250V
LN4
R33
10K
100K
D4
1N4148
D5
1N4148
R48
100R
G G
1N4148
D7
R4
G G
R36
22K
-15V
U4A
TL072
+15V
R18
4K7
R49
100R
2P2WPS
D3
+28V-28V
D10
15V ZD1.3W
R5
100KR6100K
C14
R7
100K
22N 100V
R45
R44
820R
820R
C11
0.47U 63V
R34
10K
G
Compressor On
SW1B
Limiter On
C18
47P 50V
R51
100K
U2B
TL072
Input
SK1
Hi
D
Lo
C
B
A
MJACK
R8
G
SK3
MJACK
G
1K
R1
100K
R2
100K
G
To PCB 9353
Output PCB
-28V
HD6WL
+28V
HD3
1 2 3 4 5 6
C1
100P 100V
G
Power
+15V
-15V
D1
1N4148
D2
1N4148
G
+15V
G
C4
10N 100V
R54
R53
R21
4K7
D11
LED3MMR
15V ZD1.3W
560R 5W
560R 5W
15V ZD1.3W
G
D8
R10
1M
R11
10K
C6
2U2 63V
G
G
G G
D9
G G
TL072
2P2WPS
SW1A
Gain
U1B
R12
4K7
R22
10K
C8
270P 250V
-15V
TS1
R32
10K
BC237
R46
3K3
D6
LED3MMG
G
Compressor On
G
C36
47U 50V
C302
100N 63V
C37
C303
47U 50V
100N 63V
G
VR1
22KB6S
G
C3
100P 100V
-15V
-15V
G
TL072
LN2
R3
100K
R9
1K
R13
4K7
C2
100P 100V
-15V
+15V
G
G
TS2
BC307
U1A
R37
22K
+15V
+15V
G
C12
22N 100V
-15V
TL072
+15V
Treble
R39
2K2
R15
4K7
R23
33K
Bass
U2A
VR2
22KB6S
VR3
22KB6S
C40
47N 100V
LN9
LN10
LN11
R16
4K7
R24
10K
Send
Return
R25
10K
LN1
22N 100V
C13
R17
4K7
FX Loop
VR5B
100KC6SD
R28
10K
C5
10N 100V
R19
R20
22K
22K
G
R29
10K
-15V
TL072
+15V
C15
6N8 100V
10U 50V
C16
U5A
SK2
Top
G
Bot
PHONOSTV
R40
470R
LN5
LN7
R42
820R
VR6
G G
Volume
4K7B6S
G
Tape/CD In
G
C10470P 250V
TL072
LN3
G
G
SK4
MJACK
G
G
SK5
MJACK
G
R35
10K
U4B
Mid Sweep
LN8
VR5A
2U2 63V
R56
100K
G
R26
10K
100KC6SD
G
C39
R27
10K
VR4
22KB6S
Mid Gain
R31
10K
R30
10K
LN12
G
TL072
U5B
C17
4U7 63V
LN6
G
SK6
SJACK
DI Out
R41
470R
R43
820R
D
C
B
A
Title
HCM65B
BLT
Industries
1 2 3 4 5 6 7 8
Number RevisionSize
A3
Date: 10-Apr-2002 Sheet of
File: E:\PCB\Protel PCBS\9352_3.ddb Drawn By:
9352 3
1 19352_3.sch
Rich Thompson
87654321
Note:
HCM65B, R4=47R, C3=2ยต2F
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
1 2 3 4 5 6
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
Gi
LN8
0R0
C8
470P 250V
C1
47U 50V
Gi
Gi
2
3
4
9
10
1
R3
10K
7 13
+VI +VP
-IN
+IN
GIN
STBY
MUTE
MSGND
-VI -VP
OUT
TDA7294
C10
100N 100V
Fit on HCM65R Only
R6
47R
R8
0R47 5WFPC
G
R9
100K
470R 0.5W
HCM65B Only
G
R10
R17
10R 2W5
C11
100N 100V
R7
C4
47R
47N 100V
G
G
To Loudspeaker -V
External Loudspeaker
To Loudspeaker +V
MJACK
D
SK1
SJACK
HeadPhones
SP2
SPADE4.8
SK2
SP1
SPADE4.8
LN1
Fit on HCM65B Only
0R0
G
C
R5
1K
D2
1N4007
B
Mains In
IEC Inlet
Green/Yellow
Chassis
A
h1
h2
h8
hs1
Flame proof resister
FP
Must only be replaced with same type and rating
Indicates safety critical component
Must only be replaced with approved type
1 2 3 4 5 6 7 8
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: 10-Apr-2002 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
1 19353_2.sch
Rich Thompson
B
A
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