QSC MX-2000-A Schematic
SCHEMATIC, 2-CH POWER AMPLIFIER, MX-2000-ASCHEMATIC, 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 CH 1 PARTS CH 2 PARTS PARTS IN COMMON
DISPLAY PCB
INPUT PCB
AC PCB
J 903-1
101-199 201-299
301-399 401-499 31-49
501-599
PC-001511-00
PC-001512-00
PC-004003-00 601-699 51-69
PC-002010-00 AMPLIFIER PCB 901-UP (SAME BOARD FOR CH 1, CH2)
SCHEDULE OF TEST POINTS ETC
J 903-1 NEGATIVE LIMITING VOLTAGE
J 903-2 POSITIVE LIMITING VOLTAGE
J 903-3 NOT USED
J 903-4 AMPLIFIER LOOP OPAMP OUTPUT
J 903-6 SWITCHED POS AMPLIFIER RAIL--CAUTION, HIGH VOLTAGE
J 903-8 SWITCHED NEG AMPLIFIER RAIL--CAUTION, HIGH VOLTAGE
PC-001512-00 MX-A SERIES INPUT PCBPC-001512-00 MX-A SERIES INPUT PCB
C 301 C 302
470 pF 470 pF
J 301
1/4" RTS
Ring
Tip
Gnd
A
J 32
INPUT JACK
J 31
EXPANDER
CH 1 +IN
PADS
BARRIER STRIP
CH 1 -IN
GND
CH 2 -IN
A
CH 2 +IN
J 401
1/4" RTS
Ring
Tip
Gnd
INPUT PCB NOTESINPUT PCB NOTES
1. BOARD SHIPPED WITH W 301-304, W 401-404 MOUNTED AS SHOWN.
2. PARTS WITHIN DOTTED OUTLINE FOR USER MODIFICATION. SEE MANUAL.
3. TRANSFORMER PIN NUMBERS: 1-6 TRIAD TY-144P (1-8 JENSEN JT 8043)
NOTES.
1. CH B IDENTICAL TO CH A.
2. ALL RESISTORS 1/4-WATT, 5% UNLESS NOTED.
3. ALL CAPACITORS 100V UNLESS NOTED.
TOLERANCE 20% FOR ELECTROLYTIC TYPES, 10% ON OTHER TYPES.
4. R 915 IS POSITIVE TEMPERATURE COEFFICIENT RESISTOR, MTD TO HEAT
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.
125 W, 60 V MINIMUM, ON-RESISTANCE 0.030 OHMS MAX.
6. ZENER D 913, MARKED 7.5 V, LOW LEAKAGE, QSC P/N QD-0007.5-ZT.
7. BRIDGE RECTIFIER BR 901, 902 ARE 40A, 400V, QSC P/N QD400400-BX
8. PARTS MARKED WITH TRIANGLE REPLACE WITH EXACT TYPE ONLY.
9. PARTS WITHIN DOTTED OUTLINE VOLTAGES GREATER THAN 42V.
10. BRIDGE RECTIFIER BR 101, 201, 903, 1.5A, 100V.
LAST USED REFERENCE DESIGNATORS, PC-002010-00
COMPONENT LAST USED
BRIDGE RECTIFIER
CAPACITOR
DIODE
CONNECTOR
INDUCTOR
LED
TRANSISTOR
RESISTOR
RESISTOR NETWORK RN 903
VARIABLE RESISTOR
A
C 402 C 401
470 pF 470 pF
BR 903
C 932, NO C 910
D 926
J 903
L 901
LD 901
Q 917
R 957
VR 903
INPUTS
PARALLEL
1 (1) 4 (5)
3 (4)
SW-31
QSC P/N
SW-000031-SW
STEREO
1 (1)
3 (4) 6 (8)
T 301
6 (8)
MONO
BRIDGE
T 401
4 (5)
SGM
SGM
L
G.
SGM
SGM
10-29
PC-002010-00 AMPLIFIER PCBPC-002010-00 AMPLIFIER PCB
PC-001511-00 MX-A SERIES DISPLAY PCBPC-001511-00 MX-A SERIES DISPLAY PCB
J 101 J 902 (CH A)
3
A
10K
J 201 J 902 (CH B)
A
A
C 202
.0033
V+A
SPEAKER BUS
1
D 925
1N4934
6
-30 LED
D 926
1N4934
+INPUT
8
RN 902-C
SPKR GND
GND
-INPUT
GAIN SEND
GAIN RETURN
GAIN GROUND
CLIP SEND
RELAY SENSE
RELAY CKT
V-A
V-B
SPEAKER BUS
RELAY STATUS
CLIP SEND
+INPUT
SIG GND
-INPUT
GAIN SEND
GAIN RETURN
GAIN GROUND
SPKR GND
-30 LED
V+B
RELAY CKT
A
10K
U 903-A
RN 902-B RN 902-A
R 951
5532
C 923
68 pF
PC-002010-00 AMPLIFIER PCB, CH BPC-002010-00 AMPLIFIER PCB, CH B
CONNECTIONS TO CH B PCB
SAME AS TO CH A.
13
7
10
11
12
9
A
14
5
4
2
2
1
5
14
8
7
10
11
12
9
13
6
3
4
TO +58 V
R 919
3K-2W
C 922
68 pF
A
RN 902-D
10K
AUDIO INPUT STAGE
1K
3
1
2
10K10K
RN 903-A-B
2.2K 2.2K
A
C 931 220pF
47NP-10V
A
RN 903-C
RN 903-D
C 924
R 950
2.2K
4.7 K
2.2K
J 903-2
220-25V
R 952 R 955
280-1% 60.4 K
U 903-B
R 941
47
+15 V-OPAMP
D 923C 928
1N4744A-15V
C 925
21.5K-.5W
5
6
18 pF
R 954
C 927
.10
C 932
.01
+15 V
8
7
4
-15 V
J 903-1
-15V-OPAMP
C 929 D 924
1N4744A-15V
220-25V
R 940
120 K
J 33 J 10
16-LINE
8 X 2 PIN HEADER
V+ CH A
1
PADS FOR INPUT
ACCESSORY PCB
PIN 1 V+A
220 pF
PIN 2 SP-A
PIN 3 GND
PIN 4 +1N A
W 303
PIN 5 +OUT A
PIN 6 -IN A
W 304
PIN 7 -OUT A
PIN 8 GND
PIN 9 CLIP
PIN 10 V-A
KEY
C 31
PIN 11 V- B
PIN 12 CLIP B
A
PIN 13 GND
PIN 14 -0UT B
W 404
PIN 15 -IN B
PIN 16 +OUT B
W 403
PIN 17 +IN B
PIN 18 GND
PIN 19 SP-B
PIN 20 V+B
PIN 21 SPARE
PIN 22 SPARE
W 301
R 301
(6,7)
A
C 303
W 302
R 31
20 K
R 32
24 K
W 401
C 403
(6,7)
A
R 401
W 402
SPKR SIG CH A
GND
+INPUT A
-INPUT A
GND
CLIP A
V- CH A
V- CH B
CLIP-B
GND
-INPUT CH B
+INPUT CH B
GND
SPKR SIG CH B
V+ CH B
2
R 103
432
3
4
5
6
7
8
9
10
11
12
13
14
15
R 203
432
16
7.5K-2W
C 101
47 pF
PWR-GRN
PROT-RED
C 201
47 pF
7.5K-2W
LD 201
PWR-GRN
CH B
LD 204
PROT-RED
CH B
LD 101
CH A
LD 104
CH A
LD 102
-30
C 102
YEL
R 101
.0033
A
HEAVY LINE SHOWS
MAIN SIGNAL PATH
VR 101
GAIN
CH A
R 102
10 K
LD
A
103
CLIP
RED
BR 101
R 202 10 K
A
BR 201
LD 203
CLIP-RED
LD 202
-30
CH B
CH B
VR 201
GAIN
CH B
10K
YEL
R 201
A
R 926
8.2K-2W
R 928
8.2K-2W
1K
D 922
1N4934
D 920
4.7V
R 945
680-5W
C 930
.022
D 921
1N4934
R 953
150
C 926
.0022
200V
D 919
4.7V
R 957
1K
R 948
8.2K-2W
R 946
8.2K-2W
R 929
8.2K-2W
R 949
8.2K-2W
R 927
8.2K-2W
D 902
1N4744A-15V
C 902
.001
C 916
.001
D 912
1N4744A-15V
R 947
8.2K-2W
NETWORK
BIAS
J 903-4
U 901
IC-000008-00
SCHMITT COMPARATOR
REF VOLTT2LOW RAIL
T1
R 920R 956
12K
D 903
1N4934
R 921
50 OHM
25 C
C 908
.01
R 924
12K
T1
REF VOLT
SCHMITT
COMPARATOR
U 902
IC-000009-00
VR 901
100
D 910
1N4934
T2
LOSS-OF-SAT
SHUTDOWN
SHUTDOWN
T3
SPEAKER BUS
D 907
BIAS
BIAS
1N5955A
D 906
1N5955A
D 909
1N4148
D 908
1N4148
GATE DRIVER
SLEW NEG SUPPT6BOOTSTRAP CAP
T4
T5
J 903-6
D 918
1N4934
VR 903
2K
LIM-LIM-
VR 902
2K
LIM+LIM+
D 917
1N4934
J 903-8
LOW RAIL
LOSS-OF-SAT
SHUTDOWN
T3
SHUTDOWN
T4
GATE DRIVER
SLEW
HIGH RAIL
SOURCE REF
C 901 47-50V
R 918 22K-1W
R 917
22-1W
Q 901 Q 902 Q 903 Q 904 Q 905
Q 907
2SC3298B
R 907
3.3-1W
R 908
3.3-1W
Q 908
2SA1306B
Q 910 Q 911 Q 912 Q 913 Q 914
R 922
22-1W
GATE PWR
SOURCE REF
SOURCE REF
T9
GATE
T8
22 FP
R 916
1W
T7
+58 +110 V SWITCHED BUS
R 901 R 902 R 903 R 904 R 905
2SA1302
5 PL
AUDIO OUTPUT STAGE
R 939
3.3-1W
2SC3281
5 PL
A
R 910 R 911 R 912 R 913 R 914
-58 -110 V SWITCHED BUS
R 925
3K-2W
T5
GATE
T6
T7
C 915
470-16V
R 923
22 FP
1W
.22-3W
.22-3W
5 PL
HEATSINK
GROUND
HEATSINK
GROUND
5 PL
D
GS
C 907
.10
D 901
1N5402
C 917
.10
D 911
IN5402
D
GS
-110 V RAIL
QD-000031-QD
QD-000031-QD
Q 906
R 906
2.7-2W
D 904
MUR 810
D 905
MUR 810
.10
Q 909
C 911, 912
12,000-63V 2PL
R 930
10-2W
R 931
10-2W
R 909C 909
2.7-2W
TO RECT BR 901
+110 V RAIL
C 903, 904
12000-63V 2PL
.047-400V
+58 V RAIL
L 901
R 944
5.6-2W
C 913, 914
12,000-63V
2 PL
TO RECT
BR 902
-58 V RAIL
C 933
.047-400V
C 934
.047
400V
C 939
.047-400V
C 940
C 905, 906
12000-63V 2PL
2uH
C 921
.10
R 932
10K-2W
CONNECTIONS TO CH B PCB
SAME AS TO CH A.
R 943
10-2W
SPKR-BUS
LD 901
UTIL
R 936
270
TO PWR-PROT LED
R 937
3K-2W
-58 V
BR 901
TO -110 V RAIL
TO -58 V RAIL
RN 901-D
BR 902
10-2W
100K
R 942
Q 917
2N4410
TRANSFORMER CENTER TAP
K 901
QSC PART
SW-000029-SW
NO
NC
BR 903
R 933
390K
Q 915
2N4410
D 913
7.5 V
R 938
12K
C 936
.047
400V
C 935
.047-400V
C 938
.047-400V
C 937
.047-400V
SPEAKER OUTPUT
SPEAKER COMMON
C 918 D 914
220 NP
10V
C 920
C 919
10-35V
R 934 D 916
390K
RN 901-C
100K
RN 901-B
100K
RN 901-A
100K
R 915 PTC 90-C
RE-000000-VP
J 901
12-PIN MATE-LOK
XFORM
1
T-7
T-11
4
T-8
2
T-10
3
T-9
7
10
11
5
6
1N4004
R 935
220-1W47-50V
1N4004
Q 916
2N2907
D 915
1N4004
J 901, CH B
1
4
2
3
7
10
11
5
6
8
9
12
9
T-12
XF-PTC
T-13
12
SH-002010-00
1
D1
1.
PLOTTED AT SCALE-TO-FIT, .625
NOTES : UNLESS OTHERWISE SPECIFIED
WP-002002-00
APPLICATION
MX 2000a
USED ONNEXT ASSY
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES.
DIMENSIONS PER ANSI Y14.5-1982
TOLERANCES ARE:
DECIMALS
.XX .XXX
DEBURR EDGES .XXX R MAX
+
+
-
-
AUDIO PRODUCTS, INC.
ANGLESDECIMALS
O
+
-
SCHEMATIC,
MX 2000a
D
NONE
SH-002010-00
S2010D11.FCDSH2010D1.FCD
D1
POL 1 AC SWITCH RETURN (RED)
AC LINE CORD
QSC P/N WC-003053-00
GRN/YEL
POL 1 AC SWITCH RETURN (RED)
AC LINE CORD
QSC P/N WC-003053-00
GRN/YEL
CH A XFRMR T-2 (BLK/WHT)
POL 1 AC SWITCH RETURN (RED)
AC LINE CORD
QSC P/N WC-003069-00
GRN/YEL
NOTES: UNLESS OTHERWISE SPECIFIED
CH A XFRMR T-2 (BLK/WHT)
CH A XFRMR T-5 (BRN/YEL)
NOT USED
100 VAC (BRN)
TO AC PCB
0 VAC (BLU)
TO AC PCB
AC HIGH (BROWN)
TO AC SW POL 1 (RED/BLK)
TO AC SW POL 2 (RED/BLK)
CH A XFRMR T-1 (BLK)
CH A XFRMR T-4 (BRN)
CH A XFRMR T-4 (BRN)
CH A XFRMR T-1 (BLK)
120 VAC TO FAN (BLK)
CH A XFRMR T-5 (BRN/YEL)
CH A XFRMR T-2 (BLK/WHT)
120 VAC (BRN)
TO AC PCB
0 VAC (BLU)
TO AC PCB
AC HIGH (BRN)
TO AC SW POL 1 (RED/BLK)
TO AC SW POL 2 (RED/BLK)
CH A XFRMR T-1 (BLK)
CH A XFRMR T-5 (BRN/YEL)
230 VAC (BRN)
TO AC PCB
0 VAC (BLU)
TO AC PCB
AC HIGH (BRN)
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)
100 VOLT AC PCB WIRING
CH A XFRMR T-6 (YEL)
CH A XFRMR T-3 (WHT)
NOT USED
R50
F501 R601
501
50
51 52
502 503
508
504 505
53 54 55 56
507506
R501
C501
509
C601
FAN, 120 VAC
120 VOLT AC PCB WIRING
CH A XFRMR T-6 (YEL)
CH A XFRMR T-3 (WHT)
R50
F501 R601
501
50
51 52
502 503
508
504 505
53 54 55 56
507506
R501
C501
509
C601
NOT USED
230 VOLT AC PCB WIRING
CH A XFRMR T-6 (YEL)
NOT USED
NOT USED
R50
R501
58 59 60
53 54 55 56
C501
C601
F501 R601
501
50
502 503
51 52
508
504 505
507506
509
58 59 60
57
58 59 60
57
57
RISK OF FIREREPLACE WITH
FUSE AS
MARKED
F601
607 606
603 602
605
604
CH B XFRMR T-4 (BRN)
CH B XFRMR T-3 (WHT)
CH B XFRMR T-6 (YEL)
RISK OF FIREREPLACE WITH
FUSE AS
MARKED
F601
607 606
603 602
605
604
CH B XFRMR T-3 (WHT)
CH B XFRMR T-6 (YEL)
TO FAN, AC RETURN (WHT)
RISK OF FIREREPLACE WITH
FUSE AS
MARKED
F601
607 606
603 602
605
604
NOT USED
CH B XFRMR T-6 (YEL)
TO FAN, AC RETURN (WHT)
FAN SPEED THERMOSTAT HARNESS (WHT)
FAN SPEED THERMOSTAT HARNESS (BLK)
AC LO (BLU)
CH B XFRMR T-5 (BRN/YEL)
CH B XFRMR T-2 (BLK/WHT)
15A 250V
601
CH B XFRMR T-1 (BLK)
TO FAN, AC RETURN (WHT)
FAN SPEED THERMOSTAT HARNESS (WHT)
FAN SPEED THERMOSTAT HARNESS (BLK)
AC LO (BLU)
15A 250V
601
NOT USED
FAN SPEED THERMOSTAT HARNESS (WHT)
FAN SPEED THERMOSTAT HARNESS (BLK)
AC LO (BLU)
NOT USED
12A 250V
601
REV D
CH B XFRMR T-5 (BRN/YEL)
CH B XFRMR T-4 (BRN)
CH B XFRMR T-3 (WHT)
POL 2 AC SWITCH
RETURN (RED)
REV D
NOT USED
CH B XFRMR T-4 (BRN)
CH B XFRMR T-1 (BLK)
POL 2 AC SWITCH
RETURN (RED)
REV D
CH B XFRMR T-2 (BLK/WHT)
CH B XFRMR T-5 (BRN/YEL)
CH B XFRMR T-1 (BLK)
POL 2 AC SWITCH
RETURN (RED)
CH B XFRMR T-2 (BLK/WHT)
SCHEMATIC FOR PC-004003-00 REV B
501
SWITCHED AC
TO AC CORD-HI
50
51
AC SWITCH
QSC P/N
SW-000027-SW
TO AC CORD-LO
52
AC LO
57
SWITCHED AC
601
USE 2.5 OHM
SCHEMATIC, XF-002010-00 POWER TRANSFORMER
ONE EACH FOR CHANNEL A AND B.
TERM NO AC VOLTS LEAD COLOR
T-1
120 Vac
T-2
100 Vac
T-3
0 Vac
T-4
120 Vac
T-5
100 Vac
T-6
0 Vac
PC TERMS
FUSE
SEE AC
HOOKUP
R 601
100/120V
USE 1 OHM
COLD
230V
COLD
PRIMARY SECONDARY
BLK/WHT
BRN/YEL
BLK
WHT
BRN
YEL
R 501
100/120V
USE 1 OHM
COLD
230V
USE 2.5 OHM
COLD
C 501
.068
250 VAC
R 902
60 HZ, 330-15W
50 HZ, 470-15W
C 601
.068
250 VAC
FUSE
SEE AC
HOOKUP
508
506
507
504
505
509
502
503
58
59
60
53
54
55
56
602
603
604
605
606
607
RED
ORG
BLU = CT
GREY
GRN
SEE PARA 3.3.2
SEE AC HOOKUPS
FAN WIRE ASSY
QSC P/N WC-003085-00
THERMOSTAT WIRE ASSY
QSC P/N WC-003083-00
BINDING POST SPEAKER TERMINALS
TERM NOLEAD COLOR
T-7
T-8
T-9
T-10
T-11
PURP/WHT
PURP/WHT
T-12
T-13
WP-002003-XX
4.7" AC FAN
QSC P/N MS-100004-FN
CH 1 CH 2
BLACK REDBLACK RED
PC-002010-00 MAIN AMPLIFIER PCB (UPPER PCB, CH A SHOWN)
MX 2000a
USED ONNEXT ASSY
APPLICATION
THERMOSTAT, CH A, CH B
55C FAN SPEED THERMOSTAT
QSC P/N SW-000028-SW
HEAT SINK MOUNTED EACH CH
RIBBON
14 LINES
J 101 J 201 J 10
PC-001511-00 DISPLAY AND GAIN CONTROLS
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES.
DIMENSIONS PER ANSI Y14.5-1982
TOLERANCES ARE:
DECIMALS
.XX .XXX
DEBURR EDGES .XXX R MAX
+
+
-
-
TO J 901, CH B
PIN 10
PIN 11
PIN 5
PIN 6
J 901
PIN 10
PIN 11
PIN 5
PIN 6
PIN 1
PIN 2
PIN 7
PIN 3
PIN 4
PIN 8
PIN 9
PIN 12
(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
J 902 (J902-CH B)
(FAR SIDE)
RIBBON
14 LINES
ANGLESDECIMALS
O
1/2.02 .010
+
-
PC-001512-00 INPUT JACKS
FAR SIDE--WIRING TO
XF-002010-00, CH B
AND SPEAKER TERMINALS
SAME AS CH A.
RIBBON
16 LINES
J 33
SH-002011-00
1
E
AUDIO PRODUCTS, INC.
SCHEMATIC/WIRING
DIAGRAM MX 2000a
D
NONE
SH-002011-00
SH2011E1.FCDSH2011CD.FCD
E
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