Hughes Kettner vx1200 schematic
V+
V-
BRPRTCT
LVGND-28
LSPOST
LREF
RREF
1
14_PIN_CONNECTOR
RSIG
LSPRE
RSPRE
RSPOST
LIMABLE
FROM_POT_PCB
CHGND
456
S4
GND_LIFT
123
S4
C13
V+
OUT
OUT
25V
IN
IN
100n
CHGND
22nC116
C14
25V
100n
V-
LVGND AT THE INPUT JACKS
RREF AND LREF CONNECT TO
2.10
INPUT-ED
TITLE:
C103
25V 100n
BALANCED INPUT FILTER
V+
V-
LVGND
V+
LVGND
C24
33u16V
-1dB 6Hz
-1dB 40Hz
FILTER SWITCH
TP2
1
1/2
U3
2
3
4148
D7
56K
R28
56K
R10
220p
C9
TO PIN 4 OF MC33078
V-
C15
25V 100n
4
5
IN
MC33078P
(4=V-,8=V+)
4M7
68N16v
C33
R109B
68N16v
C34
LREF
R23
MC33078
9K760
R22
9K760
C11
R27
1K54
1/2
LSPRE
V-
V+
.
12Db/Oct
6
S1
OUT
C29
16v 150N
C30
16v 150N
1
U4
2
3
220p
LREF
ENABLE
OUT
312
S2
OUT
OF SWITCH
THIS SIDE
R20
120K
LREF
TP1
220p
C10
220p
C12
LREF
LREF
LIMABLE
33K
R6
DISABLE
IN
IN
NOT USED
MC33078
R24
9K760
STEREO,MONO: RSIG = RSPOST
R26
9K760
R25
1K54
RSIG
LIMITER
RREF
6
5
U4
1/2
(4=V-,8V+)
7
M
S3
COM
LR
9 101112
MONO-STEREO-BRIDGE
BRIDGED: RSIG = LSPOST
M
S3
COM
LR
1 234
RREF
LVGND
LSPOST
RSPOST
LREF
R38
10K0
10K0
R119
6
5
U1
1/2
MC33078P
(4=V-,8=V+)
10R
10R
R112
R111
.
M
S3
COM
LR
5 678
R37
10K0
7
M
COM
LR
PC#5694_ADD_CONNECTIONS_AT_BRIDGE
CHANGED_C27,C28,C29,C30_TO_150N
AND_MADE_VALUE_CHANGES_FOR_AP2020
REVERSED_INPUT_POLARITY
FIRST_PRODUCTION
VX1200/VX2400/VX2402
M1129.SCH_DATABASE_HISTORY
# DESCRIPTION OF CHANGEVER#DATE
MODEL(S):-
RREF
RSPRE
BRPRTCT
LVGND-28
C23
33u16V
6
D4
RREF
TO PIN 4 OF MC33078
V-
220p
C8
9K760
C16
C39
25V 100n
25V 100n
9K760
V+
RREF
1K54
2.10
2.00
V
2.00
1.00
APR/22/98
DEC/02/97
D
NOV/12/97
OCT/97
RREF
FILTER SWITCH
TP3
7
1/2
MC33078P
U3
(4=V-,8=V+)
5
4148
C32
56K
R9
56K
R19
C31
1/2
MC33078
R15
U1
3
R16
220p
C6
R13
NNNNSWITCH_FOR_BRPRTCT/LVGND-28
M1129B
INPUT
VX1200/VX2400/VX2402
VVVV.
PCB#:NAME:
MODELS: SCH ISSUE:
DDDD.
10
987654321
-1dB 6Hz
-1dB 40Hz
1
2
IN
OUT
4M7
R109A
68N16v
68N16v
1
2
C5
C28
C27
C7
APR/22/98
DATE:
12Db/Oct
3
S1
R18
120K
16v 150N
RREF
16v 150N
TP4
220p
9K760
9K760
220p
R11
M1129B.SCH
R14
R12
1K54
+V
LREF
JB4
LEFT CHAN
LIN_XLR
132
NUTRIX
LREF
5
3
SRT
JB2 1
LIN_PH
6
4
2
NO_GOLD
6
4
SRT
2
RIGHT CHAN
NO_GOLD
5
3
JB1 1
RIN_PH
JB3
RREF
132
NUTRIX
RIN_XLR
YS6927
YS6900
EY18
R_RED
R_BLACK
SPEAKON
BINDING POSTSBINDING POSTS
EY16
2-
2+
1+
SPEAKON
1-
JB3
EY14
L_RED
L_BLACK
SPEAKON
A OUTPUT B OUTPUT
EY13
M1130
POWER AMPLIFIER BOARD
E
VIEW
BOTTOM
B
2-
2+
1+
B_OUTPUT
1-
JB2
BRIDGE/BI-AMP
2-
2+
1+
A_OUTPUT
1-
JB1
TB1
Clip Sense Circuit
MJL1302A
MJL3281A
R-
BLACK
EY19
OUTPUT
FROM AMP B
Dc Protection
EY17
R+
RED
AMPLIFIERS ON
OUTPUTS FROM
L-
BLACK
EY15
OUTPUT
FROM AMP A
Dc Protection
EY12
L+
YELLOW
VH+
10K
R104
0.5W
C29
63v
6800U
TB2
27p
C9
R11
ECB
MTP23P06
MTP10N15L
TRIAC_MAC224
MT1
MT2
Q9
G
MBS4992
R35
MT1GMT2
33K
R34
Q10
10u
M1130 BOARDS
TRIAC_MAC224
MT1
MT2
Q8
G
MBS4992
MT1GMT2
33K
R32
Q7
10u
VM-
VM+
GND
C31
C33
63V
63V
6800U
6800U
TB3
TB4
Q2
CLP
BC550
10K
R16
.
RED
LD1
D2
D8
D11
1K
R13
1
1/2
(4=V-,8V+)
33078
U1
30K1
2
3
C7
R8
6K04R542K2
SDG
ECB
MJE350
BC550C
BC560C
MJE340
VH+
R-
10R
C16
16v
M1131
L-
10R
R33
C15
16v
VH-
10K
R100
0.5W
C34
63V
6800U
TB5
WIRES TO BOARD M1131
D12
GND
D14
15p
ONLY
2%
VM+
6
NO
GND
Voltage Amplifier
GND
D17
4K7
R116
CBE
MPSA06
MPSA42
D34
MR854
VM+
Q22
Q18
Q15
MTP10N15L
SGD
N
C17
D44
16v
100v 1n5
47R
R48
C16
200v 2n2
1K25WR46
1K
R47
10V
D46
500mW
43V
D3
1/2W
R9
1K5
5
C-
+F15+F15
10v
C6
Current Amplifier
R15
10K0
GND
3
4
COM
R12
L2
249R
NC
1
120v
R92
10R
C39
VH+
FP
10v
C37
22u
Q29
BC550
1K5
5K6
R103
R102
75R
R76
75R
R90
BC560
Q33
BC560
2K
R72
VM+
1K82WR74
+16V
EBC
MJ15022
MJ15022
39R
R49
1W
2
C+
L2
60mA IDLE
22u
10u
D30
R91
Q21
C30
25V
C2
16V
1W
R2
2N5551
2N5401
MR854
MR854
R45
Q6
BC560
GND
39R
200v
10p
R56
100U
D40
47K
7
0.5W
C19
GND
Q38
Q23
4K7
1R
120v 220n
R3
4 WATTS4 WATTS
MJE340
C41
MJE350
D22
D21
1R
C4
10R
2K71WR78
EBC
R109
30K1
Q9
14ma
330u
16v
R101
BAV21
GND
AS35
Q24
Q20
1R
MJL3281A
R21
1n
R18
FP
D29
Q17
2N5551
4K7
R58
R50
R43
VH+
REF
OUT
IN
AMPLIFIER
MJ15022
9
MJ15022
4n7
C36
R87
249R:1%
249R
R114
VM+
R53
Current Limit
1K
R51
BC550
Q12
18V
500mW
470R
C21
16v 22n
4K7
R22
Q7.
100N
C42
2N5401
D6
CIRCUIT
/SHUTDOWN
TURN ON/OFF
3K3
R40
5
D1
D4
3
470R
R110
R23
249R
15K
150R
Q1
BC550
Q27
MJE340
68R
R93
VM+
D36
D31
4ma
1K
R68
17K8
R19
D23
D24
R61
25V
C26
22u
10V
33u
C18
D15
7
D13
(4=V-,8V+)
R34
10K0
U1
6
5
R32
10K0
C20
33U10V
TB6
L1
OUTPUT
0R105WR88
0R105WR85
BAV21
D20
R54
60K4
D16
R52
14K7
2R2
R44
D43
R42
220K
D9
R6
15K
63V
4U7
C3
14V
D41
500mW
C13
330u
16v
1R
0.5W
R113
39R
R29
LIN
CW
4K7
R115
2R2R72R2
R1
39R
1
68R
R95
D37
D33
1K
R70
3K01
R107
D27
D25
220R
25V
C28
1/2
R30
33078
R28
17K8
GND
1N4004
R111
R27
Q28
D35
22u
GND
249R
249R
4uH
112
R55
17K8
R119
A42
R118
Q3
14V
500mW
1W
1N4732A
220R
22R
MJE350
VM-
D38
Q19
GND
R60
2R2
R24
220K
Q13
R14
15K
A06
D42
D47
R33
R31
R25
R10
R4
68R
2N5401
4K7
R63
D18
14K7
R62
C15
5R65WR96
0R105WR89
0R105WR83
D19
R57
39R
47K
4K7
TB7
3R92WR94
BAV21
7K5
220K
15K
16v
R39
BAV21
Q25
+16V
C27
10
249R
C38
60K4
R59
GND
A42
Q11
R26
470K
BC550
Q5
R17
R41
330u
249R
C1
120v
2K71WR86
MJE340
C32
R65
-16V
3
R117
150v
R79
4n7
1K
BC560
4K7
C43
4K7
R20
3K3
4
Q4
1n5
R97
200v
4K7
C12
+16V
REF
10n
VM-
BC560
10p
12
IN
OUT
GND
GND
Q36
D28
MJ15023
MR854
Q32
D26
MJ15023
249R:1%
R66
C22
16v 22n
1R
470R
R108
1R
R77
R67
C23
MR854
8
1R
0.5W
120v 220n
GND
CHANNEL
TO OTHER
39R
R75
R81
Q14
R64
63V
2u2
GND
6
D7
D10
Q10
MJL1302A
Q39
MJE350
470R
R112
15K
R36
1n
C8
R35
150R
Q8
BC550
GND
120v
C40
10u
GND
10v
C35
22u
D39
Q31
BC560
1K5
39R
470R
5K6
R105
Q26
100n
AS35
R106
75R
R98
75R
R84
BC550
Q35
BC550
2K
R80
VM-
1K82WR82
C5
100u
25V
GND
1W
D5
16V
100n
C14
GND
-16V
Q37
Temperature Sensor
(mounted under heatsink)
D32
MR854
VM-
Q34
MJ15023
Q30
MJ15023
1W
16v
D45
S
Q16
MTP23P06
D
P
G
1K25WR69
VH-
C25
100v 1n
39R
R73
C24
200v 2n2
1K
R71
1.30
TESTPOINT:
POWER-AMP
-F15
BIAS ADJUSTMENT: ADJUST TRIM POT R115 FOR
22u
C10
10v
R38
10K0
R37
249R
R99
10R
VH-
FP
47K_D43_20V->18V_R3_20K->30K1_R52,
PC#_____R21,R36_20K->15K_R31,82K->
VX1200
M1130.SCH_DATABASE_HISTORY
DEC/16/97
# DESCRIPTION OF CHANGEVER#DATE
MODEL(S):-
1
TITLE:
3mV ACROSS TEST POINTS 9 @ 10
WHEN THE AMPLIFIER IS COLD
M1130
.
VX1200
PCB#:NAME:
MODELS: SCH ISSUE:
M1130VX.SCH
MAR/10/98
DATE:
PC#5641_ADD_LD1
CORRECTION_AT_Q7_
->10P/200V
PC#_____D9_4148->4004_C30,C32_4P7->
C25_470P->1N_ADD_D46,R118,R119,C43
249R_C36,C38_22N->4N7_C17680P->1N5
R54,R55_24K9->17K8_R79,R114_220R->
R61_16K9->14K7_R53,R57_64K9->60K4
1.30
1.20.......1.10
MAR/10/98
FEB/23/98
.......
1098765432
MX1
INPUT
REF
CLP
PROTECT
SIG
TEMP
SHUTDOWN
RIBBON CABLE FROM M1132
100N
C19
MPSA06
MPSA56
BC550C
BDX53C
YELLOW
RED
VH+
VM+
EY9
EY11
EY8
EY10
63v
63V
C5
C4
3300U
20K
R38
2
1
POWER SUPPLY
DB1
3
4
TB5 TB7
RED
GREY
C20
EY6 EY7
3300U
13AMP
TB9
YELLOW
100N
LVGND
EBC
CBE
ECB
HIGH CURRENT TO M1130
BLUE
WHITE
BLACK
VM-
PG
EY5
EY21
EY20
EY4
GND
63V
63v
C7
C6
3300U
3300U
20K
R37
2
1
DB2
3
RED
TB6
13AMP
4
TB8
GREY
VH-
EY18
R_RED
BINDING POSTSBINDING POSTS
JB3
1
1+
2
1-
EY14
L_RED
+V
R5
MJF6388
Q2
1K
R2
18V
ZD1
R1
0.5W
8K2
4
2-
C8
10R
ZD2
500mW
500mW
R36
R_BLACK
EY16
3
2+
L_BLACK
EY13
BLACK
BLACK
TO_INPUT
100u
25V
4V7
0.5W
33K
BRIDGE
C9
25V
18V
12
1
1+
4
2-
/BY-AMP
12
1
1+
4
2-
-V
LVGND
100u
R6
10R
Q4
ZD4
500mW
R3
JB2
3
2+
JB1
3
2+
MJF6668
1K
R4
0.5W
8K2
R-
BLACK
BLACK
EY19
RIGHT_OUTPUT
EY17
R+
RED
RED
L-
BLACK
BLACK
EY15
LEFT_OUTPUT
EY12
FROM AMP A FROM AMP B
L+
YELLOW
YELLOW
D9
D8
1N4004
1N4004
33K
R34
33K
R32
1N4004
1N4004
D7
D6
VM+
TRIAC_MAC224
MT2
Q9
MT1GMT2
TRIAC_MAC224
MT2
Q8
MT1GMT2
ZD5
500mW
Q6
D4
1/4
TLO74
U1
10
MT1
G
MBS4992
10R
R35
C16
Q10
10u
MT1
G
MBS4992
10R
R33
C15
Q7
16v
10u
R29
43V
63V
C12
4u7
Q1
AO6
D2
BC550
ZD3
R16
ON SENSOR
5.6V @ 85 DEG C
TP1
R14
8
10N
C17
9
16v
XFMR_WIRE_COLORS_TO_CE_STANDARD
ADD_CE_POWER_SUPPLY
FIRST_PRODUCTION
VX1200
1.20
1.10
1.00
M1131.SCH_DATABASE_HISTORY
JUL/16/98
MAY/27/98
NOV/97
# DESCRIPTION OF CHANGEVER#DATE
MODEL(S):-
1
OUTPUTS FROM POWER AMPLIFIER PCB M1130
C14
5K6
470u25v
R24
R22
R21
WC12
40CFM
RED WIRE
WC11
3K9
10K
+V
+V
10K
R12
1K
LVGND LVGND
FAN
FAN VOLTAGE 16V MAX AMPLIFIER HOT
BLK WIRE
PSGND
-V
LVGND
16K
R7
20K
R11
5
U1
R10
200K
1/4
TLO74
R25
5K6
ABOUT
62K
R28
5K6
500mW
5K6
R17
R13
5 WATTS
10K
10K
R15
6V2
1K
470R
Q3
LVGND
-V
MJF6388
D1
C21
100R
R27
1
2
R23
TLO74
LVGND
LVGND
3K3
1/4
TP2
1R
R31
1R
R30
LD1
RED
100N
LVGND
Q5
BC550
D3
1/4
R20
TLO74
200K
U1
3
D5
14
10N
C18
R18
U1
13
12
470R
R19
1.20
SUPPLY&FAN_PCB
TITLE:
NNNNNNN
M1131
.
VX1200
VVVVVVV
PCB#:NAME:
MODELS: SCH ISSUE:
DDDDDDD
1098765432
M1131VX.SCH
JUL/16/98
DATE:
ALL UNMARKED DIODES ARE 1N4148.
ACTUAL PARTS MAY HAVE HIGHER VOLTAGE RATINGS.
NOTE: CAPACITOR VOLTAGE RATINGS SHOWN ARE MINIMUM REQUIRED.
3K3
R9
8K2
R8
LVGND LVGND
100N
C13
6
7
@ 85 DEG C
AT SENSOR
SHUTDOWN
.
230VBROWN
682VA
YSL#1198E
230/245VAC
BLUE
4 OHM
CSA
680n
TOROID
ORANGE
SWITCH
2 OHM
IMPEDANCE
SELECTOR
CSA
4n7
245V
BLK/BRN
SERVICE WARNING: POTENTIALS CLOSE TO 200 VDC, USE CAUTION.
BREAKER
CIRCUIT
POWER SWITCH
4.5AMPS
230 VAC 50 Hz LINE
TEMPB
TEMPA
SHUTDOWN
-V
MX1
TO POT BOARD
+V
LVGND
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