A
SPKR SIG
GND
GND
GND
A
470-1W
CLIP
10K-2W
470-10V
470-10V
10K-2W
TO +15V
TO +15 V
TO -15 V
5K
5K
SPEAKER BUS
1N400410-25V
TO -24 V
470-1W
PTC-60C
THERMALLY
CONNECTED
T 6
+15 V
T15
-15 V
T16
PROCESSING BUFFER
50C +O.5V
90C +8V
THERM ADJUST, 0.5-8.5V
THERMAL SENSING
T 1
T 3
GROUND
MUTING INPUT CAP.
TIMING CAP.
T 2
RELAY
DRIVER
T 4
ON-OFF MUTING DELAY
RELAY
MUTE -24V
RUN +15V
MUTING BUS
RUN 0V
MUTE +8V
SHUTDOWN MUTING
IC-000010-00
MUTE BUS
T 5
T 7
THERMAL SENSE, 0-8V
T 8
THERMAL BUS, 0-8V
T 9
OP-AMP OUT - HF PROTECT
SHUTDOWN DETECTORS
TO MUTING
DC PROTECT SENSE
T10
THERMAL LIMITING
T11
IDLE -1.2V
CLIP +3V PEAKS0-3Vac NORMAL AUDIO
4.5-6.5Vac CLIPPING PEAKS MUTE +4.5V
LIMITING THRESHOLD +4.5V
CLIP RECTIFIER-BUFFER
HIGH FREQ
DC RECTIFIER
THERMAL
T12
T13
T14
CLIP BUS
OP-AMP OUT
OPTOCELL
T25
POSITIVE DRIVER, +0.6V IDLE
T24
NEGATIVE DRIVER, -0.6V IDLE
T23
POSITIVE BYPASS, +7.5V NORMAL, +2.5V SHORT
POSITIVE BIAS
CONTROLLER
T22
POSITIVE CURRENT FEEDBACK +3V PEAK
T21
POS CURRENT TRIMMER
T20
OUTPUT VOLTAGE FEEDBACK
LOAD IMPEDANCE
SENSING
T19
NEGATIVE TRIMMER
BIAS ENABLE
NEGATIVE BIAS
CONTROLLER
T18
NEGATIVE CURRENT FEEDBACK, -3V PEAK
T17
NEGATIVE BYPASS, -7.5V NORMAL, -2.5V SHORT
J 502-1
J 502-4
J 502-2
+ CURR LIM+ CURR LIM
- CURR LIM- CURR LIM- CURR LIM
R 598
TO Q 508
R 530
R 528
C 513
VR 503
VR 502
R 529
C 518
U 503
R 527
C 515
C 514
C 516 R 531
47-50V
47-50V
D 512
.0033
100
BIAS
1N4004
1N4004
25 C
.01
50 OHM
BIAS
NETWORK
BIAS
J 502-3
VR 501
R 599
C 504
D 505
D 506
C 512
22-1W
2SA1302
.22-3W
2SC3281
IN5402
22-1W
4.7-1W
4.7-1W
2SA1306B
2SC3298B
.10
3.9-2W
1N5402
2uH
.10
HEATSINK
GROUND
AUDIO OUTPUT STAGE
.22-3W
3 PL
3 PL
3 PL
3 PL
SPEAKER
COMMON
10A-250V
10A-250V
TRANSFORMER
CENTER TAP
SPEAKER
OUTPUT
NC
NO
QSC PART
SW-000029-SW
TO -24 V
5.6-2W
J 502-6
J 502-8
J 501
6-PIN MATE-LOK
3
4
6
1
2
5
C 511
BR 501
F 501
F 503
K 501
Q 502
R 504
R 502
Q 501
R 519
R 518
R 520 R 521 R 522
Q 508 Q 509 Q 510
D 508
Q 505 Q 506 Q 507
R 516 R 515 R 517
D 507
L 501
R 525
C 506
R 524
C 507
5.6-2W
R 523
D 501
JUMPER
+70 V
-70 V
TO -70 V RAIL
D 502
JUMPER
TO RECT BR 501
47K-1W
R 542
TO -15V
C 510
R 508
R 507
N.C.
8200-80V
8200-80V
N.C.
N.C.
4.7K-1W
SCHEMATIC, EX-800, SHEET 2, AMPLIFIER CHANNEL ASCHEMATIC, EX-800, SHEET 2, AMPLIFIER CHANNEL A
+23V ON/OFF ENABLE TRANSFORMER THERMAL SENSOR THERMAL BUS TO FAN SPEED CONTROL
TO SHEET 1
J 52-5
J 52-6
2 OF 3
390
390
R 532, 47K
+INPUT
GND REF
PWR-ON
AUDIO INPUT STAGE
HEAVY LINE SHOWS
MAIN SIGNAL PATH
SPEAKER BUS
47K-1W
R 533
VTL 5C4
U 504
68 p
A
5532
10K-4
75K
47
BA
3
5
6
8
4
7
+15 V
-15 V
DC
2
1
A
.0022
47-10NP
C 525
U 506-B
R 541
RN 501
U 506-A
C 520
C 521
R 538R 536 R 537
C 524
R 540
C 522
R 539
A
7
9
14
590
R 544
27K
4.7 K 464
27p
12.1K-.5W
.10
220-10NP
C 517
R 543
THERMAL
MUTE
14-PIN RIBBON
J 503
10
8
11
6
5
12
13
330K
TO +70 V RAIL
1N4735
6.2 V
D 513
27pC 526
SH-004101-02 2 K
SH-004101-02 K
SH0800K2.FCD
1N4735
6.2 V
D 511
D 509
1N 4148
D 510
1N 4148
(63 pages)
(12 pages)
(76 pages)
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