QSC MX-1000-A Schematic
SCHEMATIC, 2-CH POWER AMPLIFIER, MX-1000-ASCHEMATIC, 2-CH POWER AMPLIFIER, MX-1000-A
REV B3, 11-4-91, PER PC-001510-00 REV B, PC-001511-00 REV B, PC-001512-00 REV B
DOC NO. SH-001010-00 FILE SH-1010B.FCD, SEED FILE SH1010B3.FCD
PART NUMBERING SCHEDULE FOR PCBS USED IN MX-1000-A:
PCB NUMBER DESCRIPTION CH 1 PARTS CH 2 PARTS PARTS IN COMMON
PC-001511-00
PC-001512-00
PC-001513-00
PC-004103-00 AC PCB
SCHEDULE OF TEST POINTS ETCJ 502-1
CH-A CH B
DISPLAY PCB
INPUT PCB
AMP PCB
J 502-1 J 602-1 NEGATIVE LIMITING VOLTAGE
J 502-2 J 602-2 POSITIVE LIMITING VOLTAGE
J 502-3 J 602-3 NOT USED
J 502-4 J 602-4 AMPLIFIER LOOP OPAMP OUTPUT
J 502-6 J 602-6 SWITCHED POS AMPLIFIER RAIL--CAUTION, HIGH VOLTAGE
J 502-8 J 602-8 SWITCHED NEG AMPLIFIER RAIL--CAUTION, HIGH VOLTAGE
101-199 201-299
301-399 401-499 31-49
501-599 601-699 51-69
901-UP (CH 1, CH2 ON SAME PCB)
PC-001512-00 MX-A SERIES INPUT PCBPC-001512-00 MX-A SERIES INPUT PCB
1 (1) 4 (5)
3 (4)
SW-31
QSC P/N
STEREO
1 (1)
3 (4) 6 (8)
T 301
T 401
MONO
BRIDGE
W 301
R 301
(6,7)
6 (8)
C 303
W 302
W 401
C 403
(6,7)
4 (5)
R 401
W 402
C 301 C 302
470 pF 470 pF
J 301
1/4" RTS
Ring
Tip
Gnd
A
J 32
INPUT JACK
J 31
J 401
1/4" RTS
A
EXPANDER
PADS
A
C 402 C 401
470 pF 470 pF
INPUTS
PARALLEL
SW-000031-SW
BARRIER STRIP
CH 1 +IN
CH 1 -IN
GND
CH 2 -IN
CH 2 +IN
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)
REV NOTES, REMOVE FOR RELEASE PRINTS.
NOTES.
1. CH B IDENTICAL TO CH A, EXCEPT PART NUMBER SEQUENCE R 601, 602 ETC.
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 516, 616 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 503, 504, 603, 604 ARE SWITCHING FETS. QSC P/N QD-000031-QD.
125 W, 60 V MINIMUM, ON-RESISTANCE 0.030 OHMS MAX.
6. ZENERS D 517, 617, MARKED 7.5 V, LOW LEAKAGE, QSC P/N QD-0007.5-ZT.
7. BRIDGE RECTIFIER BR 503, 603, 1.5A, 100V.
8. PARTS MARKED WITH TRIANGLE REPLACE WITH EXACT TYPE ONLY.
9. PARTS WITHIN DOTTED OUTLINE VOLTAGES GREATER THAN 42V.
L
G.
10-29
6-PIN
MATE-LOK
3
V+A
SPEAKER BUS
1
1N4934 1N4934
6
-30 LED
+INPUT
8
SPKR GND
7
-INPUT
10
GAIN SEND
11
GAIN RETURN
12
GAIN GROUND
9
CLIP SEND
14
RELAY STATUS
5
RELAY CKT
4
V-A
2
2
V-B
1
SPEAKER BUS
5
RELAY STATUS
CLIP SEND
14
+INPUT
8
SIG GND
7
-INPUT
10
GAIN SEND
11
GAIN RETURN
12
GAIN GROUND
9
SPKR GND
13
-30 LED
6
V+B
3
4
RELAY CKT
D 523 D 524
PC-001510-00 AMPLIFIER PCBPC-001510-00 AMPLIFIER PCB
RN 502-B
10K
R 545
1K
3 (5)
U 503-A
(U 603-B)
2 (6)
A
RN 502-C RN 502-D
10K 10K
C 521
68 pF
A
RN 503-A-B
CH B IS LAID OUT ON RIGHT SIDE OF PC-001510-00
CIRCUIT SAME AS CHANNEL A ABOVE.
SEE PART NUMBERING SCHEDULE.
R 537 3K-2W
C 522
RN 502-A
10K
AUDIO INPUT STAGE
1 (7)
5532
2.2K 2.2K
R 549
82 K
TO +48 V
68 pF
A
C 527 220pF
C 520
47NP-10V
R 540 R 541
A
1.5K
RN 503-C
2.2K
RN 503-D
2.2K
C 525
220-25V
R 544
47
J 502-1
220-25V
432
(U 603-A)
C 528
15 pF
J 502-2
U 503-B
C 519
5 (3)
6 (2) 7 (1)
-15V-OPAMP
D 522
1N4744A-15V
+15 V-OPAMP
D 521C 526
1N4744A-15V
R 538
21.5K-.5W
R 542
75K
+15 V
-15 V
U 501
IC-000008-00
C 503
.001
C 506
.001
R 503
R 507
J 502-4
12K
12K
U 502
IC-000009-00
SCHMITT COMPARATOR
REF VOLTT2LOW RAIL
T1
R 511
50 OHM
25 C
C 508
.01
BIAS
NETWORK
T1
REF VOLT
SCHMITT
COMPARATOR
VR 501
100
BIAS
BIAS
D 505
1N4934
D 506
1N4934
T2
LOW RAIL
LOSS-OF-SAT
SHUTDOWN
LOSS-OF-SAT
SHUTDOWN
T3
SPEAKER BUS
T3
SHUTDOWN
SHUTDOWN
SLEW NEG SUPPT6BOOTSTRAP CAP
T4
D 508
1N4934
VR 502
2K
VR 503
2K
D 507
1N4934
T4
GATE DRIVER
GATE DRIVER
T5
J 502-6
J 502-8
SLEW
R 518
22-1W
R 517
22-1W
R 535
3K-5W
R 546
3K-5W
D 510
1N4744A-15V
R 522
1K
D 519
1N4934
D 514
4.7V
18 pF
R 548
450-5W
C 524
D 520
1N4934
200V
R 547
150
R 536
3K-5W
.022
D 511
4.7V
R 512
1K
D 509
1N4744A-15V
R 539
3K-5W
C 518
.12
C 523
.0022
8
4
HIGH RAIL
GATE
SOURCE REF
C 504 47-50V
R 509 22K-1W
R 519 R 520 R 521
Q 508 Q 509 Q 510
Q 502
2SC3298B
R 502
3.3-1W
R 501
3.3-1W
Q 501
2SA1306B
Q 505 Q 506 Q 507
GATE PWR
GATE
SOURCE REF
SOURCE REF
T9
T8
T7
2SA1302
3 PL
AUDIO OUTPUT STAGE
2SC3281
3 PL
-42 -84 V SWITCHED BUS
T5
T6
T7
R 505
+42 +84 V SWITCHED BUS
.22-3W
3 PL
HEATSINK
GROUND
R 543
3.3-1W
HEATSINK
GROUND
R 515R 513 R 514
.22-3W
3 PL
R 510
3K-2W
C 507
470-16V
D
Q 504
22 FP
QD-000031-QD
GS
1W
R 508 C 505
2.7-2W .10
D 502
MUR 810
D 513
1N5402
C 513
.10
A
D 512
IN5402
D 501
MUR 810
R 504
2.7-2W
R 506
D
Q 503
22 FP
QD-000031-QD
GS
1W
-84 V RAIL
C 510
15000-50V
R 524
10-2W
R 526
10-2W
-42 V RAIL
C 501
.10
TO RECT BR 502
+84 V RAIL
C 509
15000-50V
+42 V RAIL
C 511
15000-50V
2uH
L 501
R 525
5.6-2W
C 514
.10
C 512
15000-50V
TO RECT
BR 501
CH B TRANSFORMER CONNECTIONS
TO ISOLATED SECONDARY WINDINGS
SAME VOLTAGES AS CHANNEL A.
PC-001511-00 MX-A SERIES DISPLAY PCBPC-001511-00 MX-A SERIES DISPLAY PCB
J 101 J 503
7 X 2 PIN HEADER
J 33 J 10
16-LINE
8 X 2 PIN HEADER
V+ CH A
1
PADS FOR INPUT
ACCESSORY PCB
PIN 1 V+A
PIN 2 SP-A
PIN 3 GND
PIN 4 +1N A
W 303
A
R 31
20 K
R 32
24 K
A
C 31
220 pF
W 304
A
W 404
W 403
PIN 5 +OUT A
PIN 6 -IN A
PIN 7 -OUT A
PIN 8 GND
PIN 9 CLIP
PIN 10 V-A
KEY
PIN 11 V- B
PIN 12 CLIP B
PIN 13 GND
PIN 14 -0UT B
PIN 15 -IN B
PIN 16 +OUT B
PIN 17 +IN B
PIN 18 GND
PIN 19 SP-B
PIN 20 V+B
PIN 21 SPARE
PIN 22 SPARE
LAST USED REFERENCE DESIGNATORS
BRIDGE RECTIFIER
CAPACITOR
DIODE
JUMPER
INDUCTOR
LED
TRANSISTOR
RESISTOR
RESISTOR NETWORK
INTEGRATED CIRCUIT
VARIABLE RESISTOR
CHANNEL A---B
BR 503-603
C 526-626
D 524-624
J 503-603
L 501-601
LD 501-601
Q 513-613
R 549-649
RN 503-603
U 503-603
VR 503-603
SPKR SIG CH A
2
GND
3
4
+INPUT A
-INPUT A
5
6
GND
7
CLIP A
V- CH A
8
V- CH B
9
CLIP-B
10
GND
11
-INPUT CH B
12
+INPUT CH B
13
14
GND
SPKR SIG CH B
15
V+ CH B
16
R 203
R 103
634
634
47 pF
PWR-GRN
PROT-RED
47 pF
7.5K-2W
PWR-GRN
PROT-RED
R 101
7.5K-2W
C 101
LD 101
CH A
LD 104
CH A
C 201
R 201
LD 201
CH B
LD 204
CH B
LD 102
-30
C 102
YEL
.0033
VR 101
BR 101
13
A
GAIN
CH A
10K
A
A
HEAVY LINE SHOWS
MAIN SIGNAL PATH
R 102
10 K
A
LD
103
CLIP
RED
J 201 J 603 (CH B)
R 202 10 K
A
BR 201
LD 203
CLIP-RED
CH B
A
A
VR 201
GAIN
CH B
10K
LD 202
-30
CH B
YEL
C 202
.0033
A
TO -84 V RAIL
TO -42 V RAIL
R 527
10-2W
R 532
10K-2W
SPKR-BUS
RN 501-A
RN 601-D
LD 501
UTIL
R 533
270
TO PWR-PROT LED
R 534 D 517
3K-2W
-42 V
CH B TRANSFORMER PTC
J 601
CH B SPEAKER OUTPUT
BR 502
BR 501
SW-000029-SW
NO
NC
R 523
10-2W
BR 503
100K
Q 511
2N 4410
2N 4410
7.5 V
6-PIN MATE-LOK
F 502
15A-125V
F 504
15A-125V
F 501 (603)
15A-125V
F 503 (601)
15A-125V
TRANSFORMER CENTER TAP
K 501
QSC PART
R 530
330K
Q 513
R 529
12K
R 516 PTC 90-C
RE-000000-VP
J 501
3
4
6
1
2
5
SPEAKER OUTPUT
J 52-5
J 52-2, CH B
J 52-3, CH B
J 52-6
SPEAKER COMMON
C 517 D 516
220 NP
10V
C 516 R 531
47-50V
C 515
10-35V
330K
RN 501 B-C
RN 601 A-B
Q 512
2N 2907A
RN 501 D
RN 601 C
100K
J 51-2
J 51-1
3
4
6
1
2
5
J 52-2
J 52-3
100K
100K
75-1W
1N4004
1N4004
D 518R 528
1N4004
D 515
XFORM
CH A CH B
T-15 (T-18)
T-7 (T-10)
T-8 (T-11)
T-14 (T-17)
T-13 (T-16)
T-9 (T-12)
J 51-4
XF-PTC
J 51-3
SPEAKER OUTPUT
SPEAKER COMMON
SH-001010-00
1
B4
1. PLOTTED AT 1/2 SCALE.
NOTES: UNLESS OTHERWISE SPECIFIED
WP-001001-00
APPLICATION
MX 1000a
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 1000a
SH-1010B.FCD
D
NONE
SH-001010-00
S1000B41.FCD
B4
SWITCH RETURN (RED)
BRN OR BLK
100 VAC
TO AC SWITCH
AC LINE CORD
QSC P/N WC-003070-00
BLU OR WHT
0 VAC
GRN OR GRN/YEL
FAN SPEED THERMOSTAT (ORG)
100 VAC XFMR T-2 (BLC/WHT)
SWITCH RETURN (RED)
BRN OR BLK
120 VAC
TO AC SWITCH
AC LINE CORD
QSC P/N WC-003070-00
BLU OR WHT
0 VAC
GRN OR GRN/YEL
FAN SPEED THERMOSTAT (ORG)
SWITCH RETURN (RED)
BRN
230 VAC
TO AC SWITCH
AC LINE CORD
QSC P/N WC-003069-00
BLU
0 VAC
GRN/YEL
FAN SPEED THERMOSTAT (ORG)
NOTES: UNLESS OTHERWISE SPECIFIED
XFMR T-4 (BRN)
XFMR T-1 (BLK)
NOT USED
NOT USED
FAN (GRY)
NOT USED
100 VAC XFMR T-2 (BLK/WHT)
100 VAC XFMR T-5 (BRN/YEL)
NOT USED
100 VAC XFMR T-5 (BRN/YEL)
XFMR T-2 (BLK/WHT)
NOT USED
FAN (GRY)
FAN 120 VAC (GRY)
120 VAC XFRMR T-1 (BLK)
120 VAC XFMR T-4 (BRN)
XFMR T-3 (WHT)
XFMR T-4 (BRN)
XFMR T-5 (BRN/YEL)
FAN (GRY)
NOT USED
NOT USED
XFMR T-1 (BLK)
FAN (GRY)
902 903 904 905
901
911 912 913 914 915
NOT USED
902 903 904 905
901
911 912 913 914 915
FAN (GRY)
902 903 904 905
901
911 912 913 914 915
100 VOLT AC PCB WIRING
PC-004103-00 AC HOOKUP
R901
C901
906
F901
120 VOLT AC PCB WIRING
PC-004103-00 AC HOOKUP
R901
C901
906
F901
230 VOLT AC PCB WIRING
PC-004103-00 AC HOOKUP
R901
C901
906
F901
907 908 909 910
R902
RISK OF FIREREPLACE WITH
FUSE AS
20A 250V
MARKED
907 908 909 910
R902
RISK OF FIREREPLACE WITH
FUSE AS
MARKED
20A 250V
907 908 909 910
R902
RISK OF FIREREPLACE WITH
FUSE AS
MARKED
12A 250V
0 VAC XFMR T-3 (WHT)
0 VAC XFMR T-6 (YEL)
AC LO (WHT OR BLU)
FAN SPEED THERMOSTAT (ORG)
TO AC HIGH
QSC P/N SW-000016-SW
0 VAC XFMR T-3 (WHT)
0 VAC XFMR T-6 (YEL)
AC LO (WHT OR BLU)
FAN SPEED THERMOSTAT (ORG)
NOT USED
0 VAC XFMR T-6 (YEL)
AC LO (AC CORD BLU)
FAN SPEED THERMOSTAT (ORG)
AC SWITCH
SCHEMATIC OF AC HOOKUP PCB
PC-004103-00
AC HI (SW)
R 901 FUSE
901 914
SEE AC
HOOKUPS
C 901
.068
250 VAC
AC LO
100/120V
USE 1 OHM
COLD
230V
USE 2.5 OHM
COLD
907
R 902
1.2K-5W
POWER TRANSFORMER XF-001010-00
PRIMARY SECONDARY
TERM NO
AC VOLTS LEAD COLOR
T-1
T-2
T-3
(Coil on Leg One)
(Coil on Leg Two)
T-4
T-5
T-6
120 Vac
100 Vac
0 Vac
120 Vac
100 Vac
0 Vac
BLK/WHT
BRN/YEL
PC TERMS
913
915
904
905
906
902
903
908
909
910
911
912
BLK
WHT
BRN
YEL
SEE AC HOOKUPS
55C FAN SPEED THERMOSTAT
QSC P/N SW-000028-SW
HEAT SINK MOUNTED
THERMOSTAT WIRE ASSY
QSC P/N WC-003082-00
LEAD COLOR
RED
ORG
BLU
WHT/RED
WHT/ORG
WHT/BLU
BLU
GRY
GRN
WHT/BLU
WHT/GRY
WHT/GRN
GRN/WHT
TEMPERATURE SENSOR PTC
GRN/WHT
PURP/WHT
TEMPERATURE SENSOR PTC
PURP/WHT
3.125" AC FAN
QSC P/N MS-100003-FN
TERM NO
T-7
T-8
T-9
T-10
T-11
T-12
T-13
T-14
T-15
T-16
T-17
T-18
T-19
T-20
T-21
T-22
BINDING POST SPEAKER TERMINALS
CH 1 CH 2
BLACK RED RED BLACK
PC-001510-00 MAIN AMPLIFIER PCB
WP-001003-XX
MX 1000a
USED ONNEXT ASSY
APPLICATION
J 501
PIN 4
PIN 6
PIN 5
PIN 2
PIN 1
PIN 3
J 52
PIN 3
PIN 2
PIN 5
PIN 6
PIN 4
PIN 1
J 51
PIN 1
PIN 2
PIN 3
PIN 4
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES.
DIMENSIONS PER ANSI Y14.5-1982
TOLERANCES ARE:
DECIMALS
.XX .XXX
DEBURR EDGES .XXX R MAX
+
+
-
-
A PROTO RELEASE, PHQ
B 12-5-91PRODUCTION RELEASE PER ECO 1317, SGM
C 4-7-92REVISED PER ECO 1455, SGM
D REVISED PER ECO 1579 LG 9-23-92
E REVISED PER ECO 1735 WR
PC-001512-00 INPUT JACKS
J 603
J 503
RIBBON
14 LINES
RIBBON
14 LINES
J 101 J 201 J 10
PC-001511-00 DISPLAY AND GAIN CONTROLS
ANGLESDECIMALS
O
1/2.02 .010
+
-
D
J 33
J 601
PIN 4
PIN 6
PIN 5
PIN 2
PIN 1
PIN 3
RIBBON
16 LINES
AUDIO PRODUCTS, INC.
SCHEMATIC/WIRING
DIAGRAM MX 1000a
SH-001011-00
SH1011E1.FCDNONESH1011D1.FCD
8-29-91
2-15-93
SGM
SGM
SGM
SGM
SH-001011-00
1
E
E
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