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SGM
SGM
LG.
SGM
SGM
SCHEMATIC, 2-CH POWER AMPLIFIER, MX-2000-A
REV D1, 3-2-94, PER PC-002010-00 REV C, PC-001511-00 REV B, PC-001512-00 REV C1
DOC NO. SH-002010-00 FILE S2010D11.FCD, SEED FILE NO SH2010D1.FCD
PART NUMBERING SCHEDULE FOR PCBS USED IN MX-2000-A:
PCB NUMBER
DESCRIPTION
PC-001511-00
CH 1 PARTS CH 2 PARTS PARTS IN COMMON
DISPLAY PCB
101-199
201-299
10-29
PC-001512-00
INPUT PCB
301-399
401-499
31-49
PC-004003-00
AC PCB
501-599
601-699
51-69
PC-002010-00
AMPLIFIER PCB
901-UP (SAME BOARD FOR CH 1, CH2)
PC-002010-00 AMPLIFIER PCB
SCHEDULE OF TEST POINTS
J 903-1
PC-001511-00 MX-A SERIES DISPLAY PCB
J 903-1 NEGATIVE LIMITING VOLTAGE
J 903-2 POSITIVE LIMITING VOLTAGE
R 928
8.2K-2W
J 903-6 SWITCHED POS AMPLIFIER RAIL--CAUTION, HIGH VOLTAGE
3
J 903-8 SWITCHED NEG AMPLIFIER RAIL--CAUTION, HIGH VOLTAGE
1
LD 102
-30
YEL
1
470 pF
PIN 3 GND
R 103
432
13
1 (1)
4 (5)
3 (4)
A
J 31
GND
GND
BARRIER STRIP
CH 1 -IN
R 31
20 K
R 32
24 K
INPUTS
PARALLEL
STEREO
MONO
BRIDGE
RTS
C 402
A
470 pF
6
R 102
10 K
1 (1)
4 (5)
3 (4)
6 (8)
A
PIN 11 V- B
A
470 pF
W 402
C 924
47NP-10V
R 956
1K
D 920
4.7V
R 952
280-1%
A R 950
4.7 K
R 955
60.4 K
C 927
.10
C 932
.01
RN 903-C
2.2K
RN 903-A-B
2.2K 2.2K
+15 V
U 903-B
5
6
.022
R 921
D 921
1N4934
5
C 929
220-25V
D 908
1N4148
7
R 907
3.3-1W
BR 201
14
LD 203
CLIP-RED
CH B
VR 902
2K
A
15
R 930
10-2W
GROUND
10
-INPUT
11
GAIN SEND
12
GAIN RETURN
9
GAIN GROUND
R 944
5.6-2W
Q 908
2SA1306B
R 931
10-2W
11
5
6
D 917
1N4934
Q 910
Q 911
Q 912
Q 913
Q 914
GROUND
R 911
R 912
R 913
C 918
220 NP
C 913, 914
12,000-63V
2 PL
R 914
.22-3W
5 PL
SPKR-BUS
R 203
432
TOLERANCE 20% FOR ELECTROLYTIC TYPES, 10% ON OTHER TYPES.
SINK. RESISTANCE 100 OHM COLD, RISING AT 85 C. QSC P/N RE-000000-PT.
5. Q 906, 909 ARE SWITCHING FETS. QSC P/N QD-000031-QD.
V+ CH B
A
VR 201
GAIN
CH B
16
125 W, 60 V MINIMUM, ON-RESISTANCE 0.030 OHMS MAX.
T1
T2
T3
BR 902
Q 917
R 909
2.7-2W
2N4410
-58 V RAIL
R 933
390K
LOW RAIL
LD 202
-30
CH B
VOLTAGES GREATER THAN 42V.
10. BRIDGE RECTIFIER BR 101, 201, 903, 1.5A, 100V.
Q 916
2N2907
T4
SHUTDOWN
SLEW
LD 901
UTIL
T5
R 947
8.2K-2W
R 923
22 FP
GATE
D
G
LOSS-OF-SAT
COMPARATOR
Q 909
QD-000031-QD
Q 915
RN 901-B
100K
D 915
1N4004
2N4410
T6
SCHMITT
S
R 936
270
1W
GATE DRIVER
SHUTDOWN
C 915
470-16V
SOURCE REF
RN 901-A
100K
C 911, 912
12,000-63V 2PL
TO PWR-PROT LED
T7
TO RECT BR 901
R 937
3K-2W
D 913
7.5 V
R 938
12K
9
R 915 PTC 90-C
RE-000000-VP
T-12
XF-PTC
12
T-13
J 901, CH B
A
REPLACE WITH EXACT TYPE ONLY.
9. PARTS WITHIN DOTTED OUTLINE
D 916
1N4004
GATE PWR
REF VOLT
PC-002010-00 AMPLIFIER PCB, CH B
10K
7. BRIDGE RECTIFIER BR 901, 902 ARE 40A, 400V, QSC P/N QD400400-BX
R 934
390K
RN 901-C
100K
13
SPKR GND
CONNECTIONS TO CH B PCB
1
SAME AS TO CH A.
4
CONNECTIONS TO CH B PCB
2
SAME AS TO CH A.
3
SH-002010-00
6. ZENER D 913, MARKED 7.5 V, LOW LEAKAGE, QSC P/N QD-0007.5-ZT.
8. PARTS MARKED WITH TRIANGLE
C 919
10-35V
RN 901-D
100K
TO RECT
D 905
MUR 810
C 909
.10
R 935
220-1W
C 920
47-50V
-58 -110 V SWITCHED BUS
R 925
3K-2W
D 914
1N4004
10V
D 911
IN5402
HEATSINK
R 910
BR 903
R 932
10K-2W
J 903-8
R 949
8.2K-2W
10
R 942
10-2W
C 921
.10
2SC3281
5 PL
D 912
1N4744A-15V
D 924
1N4744A-15V
NC
R 943
10-2W
3. ALL CAPACITORS 100V UNLESS NOTED.
4. R 915 IS POSITIVE TEMPERATURE COEFFICIENT RESISTOR, MTD TO HEAT
T-9
SPEAKER COMMON
-110 V RAIL
7
7
HEATSINK
Q 905
-58 V
SPKR SIG CH B
T-10
NO
2uH
A
U 902
SIG GND
L 901
R 939
3.3-1W
R 908
3.3-1W
IC-000009-00
+INPUT
3
SPEAKER OUTPUT
R 924
12K
CLIP SEND
8
T-8
K 901
QSC PART
SW-000029-SW
D 901
1N5402
.10
120 K
R 201
7.5K-2W
R 905
.22-3W
5 PL
AUDIO OUTPUT STAGE
C 916
.001
R 940
NOTES.
2. ALL RESISTORS 1/4-WATT, 5% UNLESS NOTED.
D 910
1N4934
J 903-4
-15 V
R 948
8.2K-2W
RELAY STATUS
Q 904
R 904
2SA1302
5 PL
-15V-OPAMP
+INPUT CH B
13
Q 903
R 903
C 917
LIM+
R 946
8.2K-2W
14
GND
1. CH B IDENTICAL TO CH A.
Q 902
A
12
3. TRANSFORMER PIN NUMBERS: 1-6 TRIAD TY-144P (1-8 JENSEN JT 8043)
D 909
1N4148
C 908
.01
R 202 10 K
C 201
47 pF
11
2. PARTS WITHIN DOTTED OUTLINE FOR USER MODIFICATION. SEE MANUAL.
Q 901
Q 907
2SC3298B
VR 903
2K
LIM-
NETWORK
R 957
1K
-INPUT CH B
1. BOARD SHIPPED WITH W 301-304, W 401-404 MOUNTED AS SHOWN.
D 906
1N5955A
D 918
1N4934
R 902
BIAS
R 953
150
10
INPUT PCB NOTES
D 907
1N5955A
VR 901
100
BIAS
50 OHM
25 C
J 903-1
CLIP-B
GND
R 901
R 917
22-1W
D 919
4.7V
V-A
SPEAKER BUS
2
C 937
.047-400V
C 905, 906
12000-63V 2PL
+58 +110 V SWITCHED BUS
R 922
22-1W
2
V-B
T-11
TO -58 V RAIL
J 903-6
D 903
1N4934
4
R 941
47
C 931 220pF
J 902 (CH B)
1
C 940
.047-400V
D 904
MUR 810
4
C 938
.047-400V
+58 V RAIL
RELAY CKT
2
BR 902
R 918 22K-1W
4
9
T6
R 920
12K
C 926
.0022
200V
8
RN 903-D
2.2K
A
RELAY SENSE
PIN 19 SP-B
PIN 22 SPARE
T5
BOOTSTRAP CAP
C 902
.001
R 945
680-5W
R 954
21.5K-.5W
5
8
PIN 21 SPARE
T4
18 pF
C 925
C 923
68 pF
14
J 201
PIN 20 V+B
1
RN 902-A
10K
V- CH B
PIN 18 GND
D 922
1N4934
C 903, 904
12000-63V 2PL
TRANSFORMER CENTER TAP
9
BR 101
NEG SUPP
2
CLIP SEND
R 401
PIN 17 +IN B
T3
SLEW
SPEAKER BUS
12
LD 104
PROT-RED
CH A
V- CH A
PIN 16 +OUT B
W 403
D 923
1N4744A-15V
GAIN RETURN
10K
CLIP
RED
PIN 14 -0UT B
PIN 15 -IN B
A
C 928
220-25V
11
LD
103
LD 101
PWR-GRN
CH A
PIN 13 GND
(6,7)
C 401
GAIN SEND
47 pF
KEY
W 404
3
SHUTDOWN
T-7
TO -110 V RAIL
R 906
2.7-2W
C 939
.047-400V
C 901 47-50V
AUDIO INPUT STAGE
GAIN GROUND
PIN 12 CLIP B
C 403
VR 101
GAIN
CH A
C 101
A
T 401
J 401
T2
C 930
CLIP A
LOW RAIL
10
PIN 9 CLIP
C 31
220 pF
U 903-A
5532
T1
XFORM
C 935
.047-400V
T7
-INPUT
5
GND
W 401
Gnd
-INPUT A
PIN 10 V-A
CH 2 +IN
1/4"
Ring
Tip
+INPUT A
7
A
CH 2 -IN
C 907
.10
SOURCE REF
D 902
1N4744A-15V
RN 902-D
10K
RN 902-B
10K
MAIN SIGNAL PATH
PIN 7 -OUT A
PIN 8 GND
SW-31
QSC P/N
SW-000031-SW
GND
PIN 5 +OUT A
W 304
CH 1 +IN
A
HEAVY LINE SHOWS
PIN 6 -IN A
C 303
W 302
7
A
4
W 303
A
6 (8)
J 32
INPUT JACK
EXPANDER
PADS
SHUTDOWN
+15 V-OPAMP
A
RN 902-C
10K
R 951
1K
A
3
RTS
J 903-2
C 922
68 pF
C 934
.047
400V
Q 906
QD-000031-QD
S
1W
GATE DRIVER
REF VOLT
+INPUT
SPKR GND
(6,7)
R 919
3K-2W
1N4934
8
PIN 4 +1N A
R 301
T 301
J 301
D 926
2
PIN 2 SP-A
470 pF
-30 LED
SPKR SIG CH A
PIN 1 V+A
W 301
C 302
22 FP
G
LOSS-OF-SAT
TO +58 V
6
C 102
.0033
R 101
7.5K-2W
PADS FOR INPUT
ACCESSORY PCB
SPEAKER BUS
D 925
1N4934
V+ CH A
PC-001512-00 MX-A SERIES INPUT PCB
C 301
R 927
8.2K-2W
R 929
8.2K-2W
J 10
16-LINE
8 X 2 PIN HEADER
12-PIN MATE-LOK
1
D
R 916
T8
V+A
J 33
Gnd
T9
GATE
J 902 (CH A)
J 901
C 936
.047
400V
C 933
.047-400V
HIGH RAIL
IC-000008-00
SCHMITT COMPARATOR
J 101
J 903-4 AMPLIFIER LOOP OPAMP OUTPUT
1/4"
Ring
Tip
U 901
R 926
8.2K-2W
J 903-3 NOT USED
BR 901
+110 V RAIL
ETC
7
C 202
.0033
10
11
YEL
6
-30 LED
5
6
LAST USED REFERENCE DESIGNATORS, PC-002010-00
BRIDGE RECTIFIER
BR 903
CAPACITOR
C 932, NO C 910
DIODE
D 926
CONNECTOR
J 903
INDUCTOR
L 901
LED
LD 901
TRANSISTOR
Q 917
RESISTOR
R 957
RESISTOR NETWORK
RN 903
VARIABLE RESISTOR
VR 903
4
RELAY CKT
8
9
12
LD 204
PROT-RED
CH B
D1
LAST USED
V+B
1
COMPONENT
LD 201
PWR-GRN
CH B
3
UNLESS OTHERWISE SPECIFIED
AUDIO PRODUCTS, INC.
DIMENSIONS ARE IN INCHES.
DIMENSIONS PER ANSI Y14.5-1982
TOLERANCES ARE:
DECIMALS
DECIMALS
ANGLES
SCHEMATIC,
MX 2000a
O
.XX
-+
.XXX
-+
-+
DEBURR EDGES .XXX R MAX
1.
PLOTTED AT SCALE-TO-FIT, .625
WP-002002-00
NOTES : UNLESS OTHERWISE SPECIFIED
NEXT ASSY
APPLICATION
MX 2000a
D
USED ON
SH2010D1.FCD
SH-002010-00
NONE
S2010D11.FCD
D1
SCHEMATIC FOR PC-004003-00 REV B
100 VOLT AC PCB WIRING
PC TERMS
CH A XFRMR T-6 (YEL)
FUSE
FAN SPEED THERMOSTAT HARNESS (WHT)
CH A XFRMR T-3 (WHT)
CH A XFRMR T-2 (BLK/WHT)
506
100/120V
USE 1 OHM
COLD
SEE AC
HOOKUP
SWITCHED AC
AC LO (BLU)
NOT USED
R 501
501
FAN SPEED THERMOSTAT HARNESS (BLK)
CH A XFRMR T-5 (BRN/YEL)
CH B XFRMR T-5 (BRN/YEL)
230V
USE 2.5 OHM
COLD
CH B XFRMR T-2 (BLK/WHT)
NOT USED
POL 1 AC SWITCH RETURN (RED)
R50
TO AC CORD-HI
RISK OF FIREREPLACE WITH
POL 2 AC SWITCH
FUSE AS
MARKED
59
60
F501
100 VAC (BRN)
R601
53
0 VAC (BLU)
54
55
50
502
506
508
503
507
607
57
51
.068
250 VAC
502
FAN WIRE ASSY
QSC P/N WC-003085-00
503
GRN/YEL
R501
THERMOSTAT, CH A, CH B
SW-000027-SW
601
606
603
C501
60 HZ, 330-15W
50 HZ, 470-15W
C601
51
504
52
505
509
605
604
NOT USED
TO AC CORD-LO
CH B XFRMR T-1 (BLK)
TO AC SW POL 2 (RED/BLK)
59
QSC P/N SW-000028-SW
HEAT SINK MOUNTED EACH CH
60
AC LO
53
57
54
CH B XFRMR T-4 (BRN)
THERMOSTAT WIRE ASSY
QSC P/N WC-003083-00
55
CH B XFRMR T-3 (WHT)
CH B XFRMR T-6 (YEL)
CH A XFRMR T-4 (BRN)
55C FAN SPEED THERMOSTAT
REV D
TO AC SW POL 1 (RED/BLK)
CH A XFRMR T-1 (BLK)
58
R 902
602
QSC P/N WC-003053-00
AC HIGH (BROWN)
505
QSC P/N
501
TO AC PCB
SEE AC HOOKUPS
50
AC SWITCH
56
QSC P/N MS-100004-FN
504
509
52
TO AC PCB
4.7" AC FAN
507
C 501
15A 250V
RETURN (RED)
F601
58
AC LINE CORD
508
TO FAN, AC RETURN (WHT)
56
BINDING POST SPEAKER TERMINALS
FAN, 120 VAC
CH 1
602
BLACK RED
C 601
.068
250 VAC
120 VOLT AC PCB WIRING
R 601
FAN SPEED THERMOSTAT HARNESS (WHT)
CH A XFRMR T-3 (WHT)
J 33
CH A XFRMR T-1 (BLK)
601
100/120V
USE 1 OHM
COLD
CH B XFRMR T-4 (BRN)
CH A XFRMR T-5 (BRN/YEL)
CH B XFRMR T-1 (BLK)
SEE AC
HOOKUP
PIN 5
PIN 6
607
230V
USE 2.5 OHM
COLD
CH A XFRMR T-2 (BLK/WHT)
R50
PIN 10
PIN 11
606
AC LO (BLU)
120 VAC TO FAN (BLK)
FUSE
TO J 901, CH B
605
SWITCHED AC
FAN SPEED THERMOSTAT HARNESS (BLK)
CH A XFRMR T-4 (BRN)
PC-002010-00 MAIN AMPLIFIER PCB (UPPER PCB, CH A SHOWN)
RISK OF FIREREPLACE WITH
POL 2 AC SWITCH
FUSE AS
15A 250V
MARKED
59
60
F601
58
120 VAC (BRN)
PC-001512-00 INPUT JACKS
604
TO FAN, AC RETURN (WHT)
CH A XFRMR T-6 (YEL)
POL 1 AC SWITCH RETURN (RED)
CH 2
BLACK RED
603
F501
RETURN (RED)
R601
TO AC PCB
0 VAC (BLU)
AC LINE CORD
53
54
55
56
501
TO AC PCB
50
502
508
503
506
507
607
57
606
601
GRN/YEL
603
R501
QSC P/N WC-003053-00
602
C501
J 901
C601
AC HIGH (BRN)
51
504
52
505
509
605
604
REV D
CH B XFRMR T-2 (BLK/WHT)
TO AC SW POL 1 (RED/BLK)
CH B XFRMR T-5 (BRN/YEL)
TO AC SW POL 2 (RED/BLK)
NOT USED
SCHEMATIC, XF-002010-00 POWER TRANSFORMER
CH B XFRMR T-3 (WHT)
ONE EACH FOR CHANNEL A AND B.
CH B XFRMR T-6 (YEL)
NOT USED
PRIMARY
TERM NO
230 VOLT AC PCB WIRING
AC VOLTS
120 Vac
T-2
100 Vac
FAN SPEED THERMOSTAT HARNESS (WHT)
T-3
0 Vac
AND SPEAKER TERMINALS
SAME AS CH A.
LEAD COLOR
J 902
TERM NO
(J902-CH B)
(FAR SIDE)
BLK/WHT
WHT
RED
T-7
ORG
T-8
BLU = CT
T-9
GREY
T-10
GRN
T-11
AC LO (BLU)
NOT USED
CH A XFRMR T-5 (BRN/YEL)
NOT USED
CH B XFRMR T-1 (BLK)
CH A XFRMR T-2 (BLK/WHT)
POL 1 AC SWITCH RETURN (RED)
R50
RISK OF FIREREPLACE WITH
POL 2 AC SWITCH
FUSE AS
12A 250V
60
F501
T-4
120 Vac
T-5
100 Vac
T-6
0 Vac
BRN
BRN/YEL
YEL
PURP/WHT
55
16 LINES
J 201
J 10
PC-001511-00 DISPLAY AND GAIN CONTROLS
T-13
E
54
RIBBON
14 LINES
J 101
SEE PARA 3.3.2
R601
PURP/WHT
53
RIBBON
14 LINES
RETURN (RED)
TO AC PCB
0 VAC (BLU)
T-12
RIBBON
1
59
F601
MARKED
58
AC LINE CORD
XF-002010-00, CH B
FAN SPEED THERMOSTAT HARNESS (BLK)
NOT USED
CH A XFRMR T-1 (BLK)
230 VAC (BRN)
FAR SIDE--WIRING TO
SECONDARY
BLK
TO FAN, AC RETURN (WHT)
CH A XFRMR T-6 (YEL)
PIN 10
PIN 11
PIN 5
PIN 6
PIN 1
PIN 2
PIN 7
PIN 3
PIN 4
PIN 8
PIN 9
PIN 12
SH-002011-00
T-1
LEAD COLOR
(J 901-CH B)
PIN 10
PIN 11
PIN 5
PIN 6
PIN 1
PIN 2
PIN 7
PIN 3
PIN 4
PIN 8
PIN 9
PIN 12
56
501
TO AC PCB
50
502
503
508
506
507
57
607
606
GRN/YEL
601
603
R501
QSC P/N WC-003069-00
602
C501
C601
AC HIGH (BRN)
51
52
504
505
509
605
604
REV D
CH B XFRMR T-2 (BLK/WHT)
TO AC SW POL 1 (RED/BLK)
TO AC SW POL 2 (RED/BLK)
CH A XFRMR T-3, (WHT)
CH A XFRMR T-4 (BRN)
FAN, 115 VAC (BLK)
CH B XFRMR T-5 (BRN/YEL)
UNLESS OTHERWISE SPECIFIED
AUDIO PRODUCTS, INC.
DIMENSIONS ARE IN INCHES.
CH B XFRMR T-4 (BRN)
DIMENSIONS PER ANSI Y14.5-1982
CH B XFRMR T-3 (WHT)
TOLERANCES ARE:
NOT USED
DECIMALS
DECIMALS
ANGLES
SCHEMATIC/WIRING
DIAGRAM MX 2000a
O
CH B XFRMR T-6 (YEL)
.XX
-+ .02
.XXX
-+ .010
-+ 1/2
DEBURR EDGES .XXX R MAX
WP-002003-XX
NOTES: UNLESS OTHERWISE SPECIFIED
NEXT ASSY
APPLICATION
MX 2000a
D
USED ON
SH2011CD.FCD
SH-002011-00
NONE
SH2011E1.FCD
E
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