Service Manual

Product
Date:
Filename:
PCB# ofSheet
Rev:
43
V09
M1231V09SCH.sch2006
NX750P
Wed June 09, 2021
M1231NX750P
BLU
BLK
-22V
+22V
VIO
VIO
1N5402
D56
1N5402
D52
-56V
-145V
C123:A
180V3300U
1N5402
D55
BLU
3395
Thermal Breaker
WHT
BRN
CH1337U
2
4W33:B
ORN
4007
D50
SILENT
-15V
+15V
MR752
D61
GRN
6
8 W12:F
BLK
+145V
PSGND
1.0W
1K8
R187
.
PSGND
100V
C40
100N
W7
GREEN
FUSE
F1
FAST BLOW
1
2
W1:A
2
2
W1:B
IGND
240V
120V
GRY
RED
YEL
RED
GRY
CE
2
3W31:B
3
3W31:C
1
4W33:A
N.A.
#2465
F 7A
CE
#2479
F 5A
1N5402
D58
YEL
100V
100N
C116
VIO
1
8
W12:A
63V
C110
4U7
4007
D36
1N5402
D57
1N5402
D51
1N5402
D54
MR752
D59
63V
C115
2200U
MR752
D53
+56V
RED
PSGND
8
8
W12:H
C63:A
180V3300U
BRN
{Color}
{AWG}
W8
FUSE
N.A.: #2465 F 7A
CE: #2482 F3.15A
1300UH
L56492
1
2
3
4
5
6
1
3W31:A
3
4W33:C
4
4W33:D
100V
C109
100N
63V
C103
4U7
4007
D28
1N5402
D60
2
8
W12:B
63V
C104
2200U
MR752
D48
7
8 W12:G
2
6 W34:B
AC BLACK
5
6 W34:E
YEL/BLK
PSGND
250V
4N7
C112
IEC_RECT
S4
DPDT Switch
W16
GRN
INPUT GND
CHASSIS GROUND
MADE THROUGH
1/4" INPUT JACKS
6
6 W32:F
5
6 W32:E
2
6 W32:B
4
6 W32:D
3
6 W32:C
AC WHITE
3
6 W34:C
4
6 W34:D
1
2
N.A.
FUSE F1
#2465
F 7A
#2482
F3.15A
R61
2487
T7.0
2
3
4
1
4007
D49
R98
2487
T7.0
50V
C111
2200U
OUTIN
GND
MC7915CT
6871 {Watts}
.
U31
TO220
4
8
W12:D
OUTIN
GND
MC7815CT
6872 {Watts}
.
U30
TO220
3
8
W12:C
5
8
W12:E
TO POWER AMP PCB
1
6 W34:A
1
6 W32:A
250V
C106
680N
250V
C102
100N
6
6 W34:F
3
2
1
50V
C105
2200U
WITHOUT CROWBAR WITH CROWBAR
POWER SUPPLY