Page 1
SH-004101-01 1 K
SCHEMATIC, 2-CH POWER AMPLIFIER EX 1250SCHEMATIC, 2-CH POWER AMPLIFIER EX 1250
REV E, 11-6-91, FOR PC-004101-00 REV D
DOC NO. SH-004101-01
SHEET 1, HOUSEKEEPING SUPPLY AND FAN SPEED CONTROLSHEET 1, HOUSEKEEPING SUPPLY AND FAN SPEED CONTROL
+24 V
1
+15 V
3
-15 V
4
-24 V
2
SCHEDULE OF TEST POINTS ETCJ 502-1
CH-1 CH 2
J 502-1 J 602-1 NEGATIVE LIMITING VOLTAGE
J 502-2 J 602-2 POSITIVE LIMITING VOLTAGE
J 502-3 J 602-3 SWITCHING THRESHOLD REFERENCE VOLTAGE
J 502-4 J 602-4 AMPLIFIER LOOP OPAMP OUTPUT
J 502-6 J 602-6 SWITCHED POS AMPLIFIER RAIL--HIGH VOLTAGE
J 502-8 J 602-8 SWITCHED NEG AMPLIFIER RAIL--HIGH VOLTAGE
PART NUMBERING SCHEDULE FOR PCBS USED IN EX-1250:
PCB NUMBER DESCRIPTION CH 1 PARTS CH 2 PARTS PARTS IN COMMON
PC-004001-00
PC-004002-00
PC-004101-00 AMP PCB
PC-004104-00
PC-004103-00 AC PCB
DISPLAY PCB
INPUT PCB
SPKR PCB
101-199 201-299 1-29
301-399 401-499 31-49
501-599 601-699 51-69
701-799 801-899 71-99
901-UP (SAME BOARD FOR CH 1, CH2)
+24 V UNREG
+15 V REG
-15 V REG
-24 V UNREG
+23V 0N/OFF ENABLE TRANSFORMER THERMAL SENSOR THERMAL BUS TO FAN SPEED CONTROL
U 52
7815
321
100
35 V
C 55
100 2200
35 V
D 53
1N4746, 18V
D 52
1N4746, 18V
32
1
U 51
C 53C 56
2200
35V
C 54
35V
7915
+23V 0N/OFF ENABLE TRANSFORMER THERMAL SENSOR THERMAL BUS TO FAN SPEED CONTROL
D 51
1N4004
TO SHEET 2
TO SHEET 3
BR 51
J 51
B PROD RELEASE PER ECO 1107 GLF
C REVISED PER ECO 1127 RDS
D REVISED PER ECO 1262LG
E REVISED PER ECO 1289 PHQ 11-6-91
F REVISED PER ECO 1508 SGM
G REVISED PER ECO 1602 WR
H REVISED PER ECO 2009
J REVISED PER ECO 2371 MP (EFF. 7-28-94)
K REVISED PER ECO 2506 MP (EFF. 12-09-94)
R 53
A
FAN BLK
FAN RED
3.3-1W
HEAT SINK GROUND
AUDIO AND POWER GROUNDS
XF PTC
5
XF PTC
4
18 Vac
1
18 Vac
2
CT
3
D
C
RN 51
2.7K
2.7K
-24 V
R 52
180K
C 52
47-10NP
Q 52
2N2907
Q 53
2N4410
2.7K
A
2.7K
NOTES.
1. ALL RESISTORS 1/4-WATT, 5% UNLESS NOTED.
2. ALL CAPACITORS 100V UNLESS NOTED.
TOLERANCE 20% FOR ELECTROLYTIC TYPES, 10% ON OTHER TYPES.
3. BRIDGE RECTIFIER BR 51, 1.5A, 100V.
4. R 598, 698 IS POSITIVE TEMPERATURE COEFFICIENT RESISTOR MOUNTED TO HEAT SINK.
RESISTANCE 100 OHM COLD, RISING AT 55 C. QSC P/N RE-000006-PT
5. Q 503, 504, 603, 604 ARE SWITCHING FETS. QSC P/N QD-000013-00 OR QD-000031-QD.
125 W, 50 V MINIMUM, ON-RESISTANCE 0.030 OHMS MAX.
6. ZENERS D 503, 504, 603, 604 MARKED 7.5 V TESTED FOR LOW LEAKAGE, QSC P/N QD-0007.5-ZT.
7. ZENERS D 509, 513, 609, 613, 6.2V-500mW, TESTED FOR LOW LEAKAGE, QSC P/N QD-000024-QD.
8. PARTS MARKED WITH TRIANGLE MUST BE REPLACED WITH EXACT TYPE ONLY.
9. PARTS ENCLOSED WITHIN DOTTED OUTLINE HAVE VOLTAGES GREATER THAN 42V.
R 51
47K
C 51
100-35V
C 57
.01
B
Q 51
2SC3298B
J 52-1
24 V BRUSHLESS FAN
J 52-4
5-29-91 SGM
7-12-91
10-9-91
6-10-92
10-21-92
L
5-11-94
G
7-20-94
SGM
SGM
SGM
SGM
SGM
SGM
SGM
/
RAB
LAST USED REF. DESIGN.
BR 51, BR 502, 602
C51 - 57, C526, 626
D51 - 53, D513, 613
F504, 604
J51, 52, J503, 603
K501, 601
L501, 601
Q51 - 53, Q510, 610
R51 - 53, R544, 644, R598, 698, R599, 699
RN51, RN502, 602
U51, 52, U506, 606
VR503, 603
WP-004101-10
APPLICATION
EX1250
USED ONNEXT ASSY
AUDIO PRODUCTS
PHQ 5-15-91
SH1250J1.FCD SH1250K1.FCD
SCHEMATIC EX-1250
DRAWING
SH-004101-01 K
1 3
Page 2
SCHEMATIC, EX-1250, SHEET 2, AMPLIFIER CHANNEL ASCHEMATIC, EX-1250, SHEET 2, AMPLIFIER CHANNEL A
C 516 R 531
470-1W
D 512
1N400410-25V
TO -24 V
SH-004101-01 2 K
MUTE
THERMAL
SPKR SIG
14-PIN RIBBON
J 503
CLIP
GND
GND
GND
+INPUT
AUDIO INPUT STAGE
GND REF
PWR-ON
10
R 543
330K
8
C 517
220-10NP
11
C 518
470-10V
VR 502
5K
+ CURR LIM+ CURR LIM
VR 503
5K
- CURR LIM- CURR LIM- CURR LIM
C 513
470-10V
6
5
12
13
HEAVY LINE SHOWS
MAIN SIGNAL PATH
14
9
7
10K-2W
J 502-1
R 529
10K-2W
J 502-2
R 528
7.5K-2W
R 527
R 530
590
A
U 504
VTL 5C4
R 533
47K-1W
A
R 544
27K
TO +15V
R 532, 47K
TO +46 V RAIL
C 514
47-50V
C 515
47-50V
TO +15 V
TO -15 V
SPEAKER BUS
A
MUTING INPUT CAP.
T 1
TIMING CAP.
T 2
GROUND
T 3
RELAY
DRIVER
T 4
MUTE BUS
T 5
THERM ADJUST, 0.5-8.5V
T 6
THERMAL SENSE, 0-8V
T 7
THERMAL BUS, 0-8V
T 8
OP-AMP OUT - HF PROTECT
T 9
DC PROTECT SENSE
T10
THERMAL LIMITING
T11
OP-AMP OUT
T12
OPTOCELL
T13
CLIP BUS
T14
+15 V
T15
-15 V
T16
NEGATIVE BYPASS, -7.5V NORMAL, -2.5V SHORT
T17
NEGATIVE CURRENT FEEDBACK, -3V PEAK
T18
NEGATIVE TRIMMER
T19
OUTPUT VOLTAGE FEEDBACK
T20
POS CURRENT TRIMMER
T21
POSITIVE CURRENT FEEDBACK +3V PEAK
T22
POSITIVE BYPASS, +7.5V NORMAL, +2.5V SHORT
T23
NEGATIVE DRIVER, -0.6V IDLE
T24
POSITIVE DRIVER, +0.6V IDLE
T25
C 524
47-10NP
A
1.5 K
BA
+15 V
8
5
6
4
-15 V
DC
U 506-B
5532
RN 501
10K-4
ON-OFF MUTING DELAY
SHUTDOWN MUTING
RELAY
MUTE -24V
RUN +15V
THERMAL SENSING
PROCESSING BUFFER
MUTING BUS
MUTE +8V
RUN 0V
THERMAL
HIGH FREQ
DC RECTIFIER
50C +O.5V
CLIP RECTIFIER-BUFFER
LIMITING THRESHOLD +4.5V
4.5-6.5Vac CLIPPING PEAKS MUTE +4.5V
LOAD IMPEDANCE
SENSING
18pF-5%
C 522
R 540
21.5K-.5W
R 538R 536 R 537
C 521
U 506-A
R 541
590
75K
.12
C 520
.0022
R 539
47
3
2
1
C 526
27 p
1N4735
D 509
1N 4148
7
C 525
68 p
590
A
90C +8V
SHUTDOWN DETECTORS
TO MUTING
IDLE -1.2V
CLIP +3V PEAKS0-3Vac NORMAL AUDIO
NEGATIVE BIAS
CONTROLLER
BIAS ENABLE
POSITIVE BIAS
CONTROLLER
D 510
D 513
6.2 V
1N 4148
D 511
1N4735
6.2 V
U 503
IC-000010-00
U 501
IC-000008-00
SCHMIDTT COMPARATOR
LOSS-OF-SAT
SHUTDOWN
REF VOLTT2LOW RAIL
T1
D 504
7.5V
+46 V RAIL
J 502-3 J 502-6
VR 501
100
BIAS
BIAS
R 599
50 OHM
25 C
C 504
.01
BIAS
NETWORK
D 505
1N4004
C 512
.0033
D 506
1N4004
U 505-B
D 503
7.5V
C 519
+15 V
8
5
6
4
-15 V
R 534 C 523
2.7K
A
680p
T1
REF VOLT
SCHMIDTT
COMPARATOR
U 502
IC-000009-00
R 598
PTC-60C
J 502-4
+23V 0N/OFF ENABLE TRANSFORMER THERMAL SENSOR THERMAL BUS TO FAN SPEED CONTROL
TO SHEET 1
THERMALLY
CONNECTED
TO Q 508
7
SWITCHING THRESHOLD
.0022
T2
U 505-A
5532
R 535
15K
REFERENCE
-46 V RAIL
LOW RAIL
1
C
D
RN 502
1K-4
3
2
LOSS-OF-SAT
SHUTDOWN
SHUTDOWN
T3
SPEAKER BUS
B
A
T3
SHUTDOWN
GATE DRIVER
SLEW NEG SUPPT6BOOTSTRAP CAP
T4
R 508
332
R 503 R 506
1.5K
750K
R 501 R 505
1.5K
750K
R 507
332
T4
SLEW
GATE DRIVER
T5
J 502-8
R 519
22-1W
R 518
22-1W
HIGH RAIL
GATE
SOURCE REF
C 502 47-50V
R 513 22K-1W
R 520 R 521 R 522
Q 508 Q 509 Q 510
Q 502
2SC3298B
R 504
4.7-1W
R 502
4.7-1W
Q 501
2SA1306B
AUDIO OUTPUT STAGE
Q 505 Q 506 Q 507
R 516 R 515 R 517
GATE PWR
GATE
SOURCE REF
SOURCE REF
+92 V RAIL
T9
T8
T7
+46 +92 V SWITCHED BUS
2SA1302
3 PL
2SC3281
3 PL
-46 -92 V SWITCHED BUS
T5
T6
T7
-92 V RAIL
D 508
1N5402
D 507
IN5402
D
GS
R 512 C 503
2.7-2W .10
HEATSINK
GROUND
C 507
.10
R 509 C 501
2.7-2W
D
GS
R 511 Q 504
22 FP
.22-3W
3 PL
.22-3W
3 PL
R 514
3K-2W
R 510
22 FP
C 505
470-10V
D 502
MUR 810
D 501
MUR 810
Q 503
R 524
3.9-2W
.10
C 509
15000-50V
C 511
15000-50V
L 501
R 525
5.6-2W
C 510
15000-50V
C 508
15000-50V
2uH
R 523
5.6-2W
C 506
.10
R 526
3K-2W
R 542
47K-1W
TO -15V
TO -92 V RAIL
TO -46 V RAIL
TO -24 V
TO RECT BR 501
TO RECT BR 502
SH1250K2.FCD
BR 502
BR 501
F 502
10A-250V
F 504
10A-250V
F 501
10A-250V
F 503
10A-250V
J 501
6-PIN MATE-LOK
3
4
6
1
TRANSFORMER
CENTER TAP
2
5
K 501
NO
NC
J 52-5
SPEAKER
OUTPUT
SPEAKER
COMMON
J 52-6
SH-004101-01 K
2 OF 3
Page 3
SH-004101-01 3 K
MUTE
THERMAL
GND
GND
GND
SPKR SIG
+24 V
+15 V
-15 V
-24 V
CLIP
J 603
1
3
4
2
10
R 643
330K
8
220-10NP
11
C 618
470-10V
R 629
10K-2W
VR 602
5K
+ CURR LIM+ CURR LIM
VR 603
5K
- CURR LIM- CURR LIM
C 613
470-10V
6
5
12
13
14-PIN RIBBON
N.C.
N.C.
N.C.
N.C.
C 617
R 627
10K-2W
J 602-1
J 602-2
A
R 628
7.5K-2W
R 630
590
A
SCHEMATIC, EX 1250, SHEET 3, AMPLIFIER CHANNEL BSCHEMATIC, EX 1250, SHEET 3, AMPLIFIER CHANNEL B
TO -24 V
1N4004
C 614
47-50V
C 615
47-50V
TO +15 V
TO -15 V
SPEAKER BUS
R 631
470-1W
MUTING INPUT CAP.
T 1
TIMING CAP.
T 2
GROUND
T 3
RELAY
DRIVER
T 4
MUTE BUS
T 5
THERM ADJUST, 0.5-8.5V
T 6
THERMAL SENSE, 0-8V
T 7
THERMAL BUS, 0-8V
T 8
OP-AMP OUT - HF PROTECT
T 9
DC PROTECT SENSE
T10
THERMAL LIMITING
T11
OP-AMP OUT
T12
OPTOCELL
T13
CLIP BUS
T14
+15 V
T15
-15 V
T16
NEGATIVE BYPASS, -7.5V NORMAL, -2.5V SHORT
T17
NEGATIVE CURRENT FEEDBACK, -3V PEAK
T18
NEGATIVE TRIMMER
T19
OUTPUT VOLTAGE FEEDBACK
T20
POS CURRENT TRIMMER
T21
POSITIVE CURRENT FEEDBACK +3V PEAK
T22
POSITIVE BYPASS, +7.5V NORMAL, +2.5V SHORT
T23
NEGATIVE DRIVER, -0.6V IDLE
T24
POSITIVE DRIVER, +0.6V IDLE
T25
C 624
47-10NP
ON-OFF MUTING DELAY
RELAY
MUTE -24V
RUN +15V
THERMAL SENSING
PROCESSING BUFFER
THERMAL
HIGH FREQ
DC RECTIFIER
LIMITING THRESHOLD +4.5V
4.5-6.5Vac CLIPPING PEAKS MUTE +4.5V
LOAD IMPEDANCE
SENSING
C 622
R 640
21.5K-.5W
C 616
10-25V
TO +15V
R 632, 47K
R 644
27K
SHUTDOWN MUTING
MUTING BUS
MUTE +8V
RUN 0V
50C +O.5V
CLIP RECTIFIER-BUFFER
18pF-5%
90C +8V
SHUTDOWN DETECTORS
TO MUTING
IDLE -1.2V
CLIP +3V PEAKS0-3Vac NORMAL AUDIO
NEGATIVE BIAS
CONTROLLER
BIAS ENABLE
POSITIVE BIAS
CONTROLLER
+23V 0N/OFF ENABLE TRANSFORMER THERMAL SENSOR THERMAL BUS TO FAN SPEED CONTROL
U 603
IC-000010-00
TO SHEET 1
C 604
BIAS NETWORK
R 699
50 OHM
25 C
.01
R 698D 612
PTC-60C
THERMALLY
CONNECTED
TO Q 607
VR 601
100
BIAS
BIAS
D 605
1N4004
C 612
.0033
D 606
1N4004
D 604
7.5V
U 605-B
D 603
7.5V
5
6
U 601
IC-000008-00
SCHMIDTT COMPARATOR
REF VOLTT2LOW RAIL
T1
C 619
680p
+15 V
8
7
4
-15 V
R 634 C 623
2.7K
A
T1
REF VOLT
SCHMIDTT
COMPARATOR
U 602
IC-000009-00
+46 V RAIL
U 605-A
5532
1
R 635
15K
SWITCHING THRESHOLD
REFERENCE
C
D
.0022
RN 602
-46 V RAIL
T2
LOW RAIL
1K-4
LOSS-OF-SAT
SHUTDOWN
3
2
A
T3
LOSS-OF-SAT
SHUTDOWN
T3
SPEAKER BUS
B
SHUTDOWN
SHUTDOWN
GATE DRIVER
SLEW NEG SUPPT6BOOTSTRAP CAP
T4
R 608
332
R 603
R 606
1.5K
750K
R 601
R 605
1.5K
750K
R 607
332
T4
SLEW
GATE DRIVER
T5
J 602-6J 602-3
J 602-8
R 619
22-1W
R 618
22-1W
HIGH RAIL
GATE
SOURCE REF
C 602 47-50V
R 613 22K-1W
R 620 R 621 R 622
Q 608 Q 609 Q 610
Q 602
2SC3298B
R 604
4.7-1W
R 602
4.7-1W
Q 601
2SA1306B
AUDIO OUTPUT STAGE
Q 605 Q 606 Q 607
R 616 R 615 R 617
GATE PWR
GATE
SOURCE REF
SOURCE REF
+92 V RAIL
T9
T8
T7
+46 +92 V SWITCHED BUS
2SA1302
3 PL
2SC3281
3 PL
-46 -92 V SWITCHED BUS
T5
T6
T7
-92 V RAIL
R 611
.22-3W
3 PL
.22-3W
3 PL
R 614
3K-2W
R 610
C 605
470-10V
22 FP
1N5402
D 607
IN5402
22 FP
GS
D 608
GS
D
Q 604
R 612 C 603
2.7-2W .10
D 602
MUR 810
HEATSINK
GROUND
.10
MUR 810
C 601
.10
D
Q 603
D 601
R 624
3.9-2W
R 609
2.7-2W
C 607
C 609
15000-50V
C 611
15000-50V
L 601
R 625
5.6-2W
C 610
15000-50V
C 608
15000-50V
2uH
R 623
5.6-2W
C 606
.10
R 626
3K-2W
R 642
47K-1W
TO -15V
TO -92 V RAIL
TO -46 V RAIL
TO -24 V
TO RECT BR 601
TO RECT BR 602
BR 602
BR 601
K 601
F 602
10A-250V
F 604
10A-250V
F 601
10A-250V
F 603
10A-250V
6-PIN MATE-LOK
TRANSFORMER
CENTER TAP
NO
NC
J 601
3
4
6
1
2
5
SPEAKER
OUTPUT
SPEAKER
COMMON
J 52-2
J 52-3
+INPUT
AUDIO INPUT STAGE
GND REF
PWR-ON
HEAVY LINE SHOWS
MAIN SIGNAL PATH
14
U 604
VTL 5C4
9
R 633
47K-1W
7
A
TO +46 V RAIL
RN 601
10K-4
U 606-B
5532
R 636
1.5 K
8
4
7
C 625
68 p
R 637
590
A
C
A
R 641
U 606-A
590
R 638
75K
3
2
C 626
27 p
C 621
C 620
.0022
R 639
.12
47
1
D 613
1N4735
6.2 V
D 609
1N 4148
D 610
1N 4148
D 611
1N4735
6.2 V
J 602-4
J 602-4
SH-004101-01 K
SH1250K3.FCD
3 OF 3
A
B
+15 V
5
6
-15 V
D
Page 4
AC RELAY 1
AC RELAY 2
+24V
-24V
REG. +15V
- INPUT
+ INPUT
SIG. GND
SIG. GND
REG. -15V
THERM BUS, 0-8V
PWR-ON, 0-15V
SPKR SIGNAL, 5V PK
CLIP-LIM BUS, 0-4V
MUTE BUS, 0-8V
PWR GND
CH 2 PINS
- INPUT
+ INPUT
SIG. GND
SIG. GND
THERM BUS, 0-8V
PWR-ON, 0-15V
SPKR SIGNAL, 5V PK
CLIP-LIM BUS, 0-4V
MUTE BUS, 0-8V
PWR GND
J 1 26-PINS
25
26
10
9
12
1
2
3
5
11
23
19
15
21
17
13
4
6
7
8
24
19
16
22
18
14
RN101
10K D(C)
10K B
Q103
2N4410
R112
1.5K
RN103
1K-D
LD105
GRN
PWR ON
SCHEMATIC, EX-SERIES DISPLAY BOARD.
PC-004001-00, REV A.
100p
C101
10K C(D)
U101 B
8
5532
6
5
10K A
100p
+
C108
10uF
LD104
YEL YEL
-30
BA6124
U102
C105
10uF
VR101
7
4
10K
GAIN
R105
100
R109
3.9K
1K-D
LD103
C106
-10
10uF
R113
634
R107
330K
R108
536
RN 104
1K-C
NOTES
1. ALL RESISTORS 1/4 WATT UNLESS SPECIFIED.
2. ALL CAPACITORS 25V UNLESS SPECIFIED.
3. CH 2 RESISTOR NETWORK SECTIONS ( ) WHEN DIFFERENT.
4. CH 1 COMPONENTS NUMBERED 101-199
5. CH 2 COMPONENTS NUMBERED 201-299.
6. PARTS IN COMMON TO BOTH CHANNELS NUMBERED 1-99.
7. U102, 202 ROHM BA6124 OR SAMSUNG KA2284/85
8. LD 101, 102, HIGH-EFFICIENCY RED LED.
9. LD 103, 104, HIGH-EFFICIENCY YELLOW LED.
10. LD 105, HIGH-EFFICIENCY GREEN LED.
C102
R102
1K
LEVEL
R106
10K
R110
4.7K
A
LD102
RED
LIM-CLIP
1K-B
1K-A
Q 104
2N 4410
U101 A
5532
3
2
R103 R104
1K 536
R111
1.5K
C104
470 10V
+
C 109
10uF
Q102
2N
4410
1
RN102
C103
C107
4.7uf NP
10K-D(A)
10K-C(B)
10K-B(C)
10K-A(D)
.0033
C2
10uf
C1
10uf
Q101
MPS2907
+
+
D101
1N4004
R101
100
LD101
RED
TEMP-PROT
J101, 201 14-PINS
2
1
4
13
10
11
3
7
8
14
12
9
RN103
1K-C
1K-B
1K-A
5
6
+24V UNREG
-24V UNREG
+15V REG
TO AMP +INPUT
TO AMP -INPUT
SIG. GND
-15V REG
THERM BUS 0-8V
Vcc SENSE R
SPKR SIGNAL, 5V PK
CLIP-LIM BUS, 0-4V
MUTE BUS, 0-8V
PWR GND
PWR GND
PAT QUILTER 6-19-90
A PROD REL PER ECO 756
B REVISED PER ECO 1603 WR
SCHEMATIC DIAGRAM
EX-SERIES DISPLAY BOARD
6-19-90
9-29-92
SH-004001-00 1 B
FCAD: 004001SH SH4001B1.FDC
SH-004001-00 B
1 OF 1
Page 5
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY
OF QSC AUDIO PRODUCTS
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
QSC AUDIO PRODUCTS.
D
C
B
, THAT MAY NOT
4
3
2
1
REVISIONS
ZONE REV
DESCRIPTION
DATE
APPROVED
ABPROD REL PER ECO 756
6-10-91
1-24-92
L
G.
SGM
SGM
D
C
B
SCHEMATIC, EX-SERIES STANDARD INPUT BOARD.
FOR PC-004005-00 REV B 7-15-93
J 301
XLR
CH 1 +IN
2
3
1
A
J 31
W 304
SHIPPED XLR PIN 2 HI
MOVE W 303, 304 TO ALT
POSITION FOR PIN 3 HI
J 33
CH 1 -IN
GND
CH 2 -IN
CH 2 +IN
J 401
XLR
2
3
1
A
SHIPPED XLR PIN 2 HI
MOVE W 303, 304 TO ALT
POSITION FOR PIN 3 HI
W 303
A
W 403
INPUTS
PARALLEL
W 404
C 302 C 301
470 p 470 p
MONO-BRIDGE
CENTER
SW 31
STEREO
C 402 C 401
470 p 470 p
R 32 24K
3-POS
W 301
T 301
1 (1) 4 (5)
3 (4)
W 302
20.0 K
W 401
T 401
3 (4) 6 (8)
1 (1)
W 402
R 31
6 (8)
A
4 (5)
C 31
220p
(6, 7)
C 303
(6, 7)
R 301
R 401
C 403
CHANGE VALUE R31, WAS 21 K
SEE ECO 1097
C REVISED FOR MIN-SLOT, BR-SW
SEE ECO 1297 BY PHQ
D
PADS FOR LEVEL 1-A
OR 2-A ACCESSORY PCB
PIN 1 V+A
PIN 2 SP-A
PIN 3 GND
PIN 4 +1N A
A
A
W 305
W 306
W 406
W 405
NC
NC
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
J 32
11
+15 V REG
16
CH 1 SPKR SIG
4
GND
6
1
2
22
12
10
9
21
8
7
3
5
14
13
15
18
17
20
19
24
23
26
25
GND
+INPUT CH 1
-INPUT CH 1
CH 1 CLIP-LIM
-15 V REG
-24 V
+24 V
CH 2 CLIP-LIM
GND
GND
-INPUT CH 2
+INPUT CH 2
GND
GND
CH 2 SPKR SIG
CH 1 MUTE
CH 2 MUTE
CH 1 PWR-ON
CH 2 PWR-ON
CH 1 THERMAL
CH 2 THERMAL
CH 1 AC RELAY
CH 2 AC RELAY
A
A
REVISE PER ECO 1916
NOTES, ALL REV LEVELS
1. ALL RESISTORS 1/4W, 5%.
2. ALL CAPACITORS 100V
3. J 32, 26-PIN CONNECTOR, TO J 1 ON FRONT DISPLAY BOARD PC-004001-00.
4. PARTS FOR CH 1 NUMBERED 301-399.
5. PARTS FOR CH 2 NUMBERED 401-499.
6. PARTS IN COMMON TO BOTH CHANNELS NUMBERED 31-49.
7. BOARD SHIPPED WITH W 301-304, W 401-404 MOUNTED AS SHOWN.
8. PARTS WITHIN DOTTED OUTLINE FOR USER MODIFICATION. SEE MANUAL.
A
NOTES, REV LEVELS A-B
1. THE FIRST YEAR OF PRODUCTION EX AMPLIFIERS SHIPPED WITH PC-004002-00 REV A OR B
2. FOR PC-004005-00 REV A, ADDED PADS 1-20 FOR LEVEL 1-A, 2-A INPUT ACCESSORY PCB
3. ADDED J33, 5-PIN INPUT EXTENDER HEADER AND W305,306,405 & 406.
4. NO CHANGE IN PINOUT OF J32, PINS 1-26
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES.
DIMENSIONS PER ANSI Y14.5-1982
TOLERANCES ARE:
DECIMALS
.XX .XXX
+
-
DEBURR EDGES .XXX R MAX
MATERIAL
+
-
5. SW-31 WAS REVISED ON PC-004005-00 REV A, BUT WILL NOT AFFECT FUNCTION OF UPPER SLOT PCB.
NOTES: UNLESS OTHERWISE SPECIFIED
4
PC-004005-00 EX/MPA SERIES
USED ONNEXT ASSY
APPLICATION
3
FINISH
DO NOT SCALE DRAWING
2
CONTRACT NO.
ANGLESDECIMALS
+
-
O
APPROVALS
DRAWN
PAT QUILTER
CHECKED
ISSUED
CAD SEED FILE NO.
SH40002C1.FCD
PARTS LIST
DATE
6-18-90
AUDIO PRODUCTS, INC.
COSTA MESA, CALIFORNIA
SCHEMATIC DIAGRAM
EX SERIES STANDARD,
INPUT BOARD
SIZE
FSCM NO. DWG NO. REV
C
SCALE
CAD FILE NO.
SH-004002-00 D
SHEET
1 OF 1SH4002D1.FCDNONE
1
A
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