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THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS, THAT MAY NOT BE DISCLOSED, REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS.
7
6
5
SENSOR
0C - 1.8V 25C - 1.58V 55C - 1.2V 65C - 1.07V 95C - 0.75V THERMAL GAIN SET AT 3.66 FOR 4.4V AT 55C, FAN SPEED
4
THERMAL TRACKING
+5V
EMITTER R
C45 P1
0.22UF 10 PCNT 50V
3
REV
2
REVISIONS
DESCRIPTION
1
EFF. DATE CHK APPROVED/DATE
+15V
B
1
+15V
R105
4.75K 1 PCNT 1/10W
12.6v
R110
383 1 PCNT 1/10W
DISPLAY AND GAIN BOARD
5K
CC 1
+5V
U8
VOLTAGE REGULATOR
VOUT
1.57v 5 under the front heatsink U9 1 V+ 2 VO
GND
R123
4.75K 1 PCNT 1/10W
D19
1N4743A
FAN
2
R120 J5
634 1 PCNT 1/10W
11.3v idle
0C - NIL 25C - NIL 55C - START 65C - 2MA 95C - 7MA, 1.4V
16v J5
PRODUCTION RELEASED PER ECO 8550 EMITTER RESISTORS HAVE NEW PART NUMBER UPDATED GAIN POTS AND SPEAKONS
03/15/08
RAB
DD
LM339AM
2
C81
0.1UF 10 PCNT 50V
3 W
6
5
6
5
5.8v
5v
3
-15V
+15V
5K
CC 1
LD3
LED GREEN LED RED BIPOLAR
LD4
LED GREEN LED RED BIPOLAR
SIG-B
R33
3.01K 1 PCNT 1/10W
SP-B
2
R54 R58
30.1K 1 PCNT 1/8W
VIN
1
C38
3
W
SENSOR
1.57v C40
0.1UF 10 PCNT 50V
4
U7 C46 P1 R102
20.0K 1 PCNT 1/8W 0.22UF 10 PCNT 50V
TH-A
TH BUS
0C - 6.6V 25C - 5.8V 55C - 4.4V 65C - 3.9V 85C - 3.17V 95C - 2.75V
R46
2.00K 1 PCNT 1/10W
C39
0.1UF 10 PCNT 50V
3
VR1
2
W
R13
3.48K 1 PCNT 1/10W
VR2
2
W
R14
3.48K 1 PCNT 1/10W
LD2 C23
0.22UF 10 PCNT 50V
LD6 C24
0.22UF 10 PCNT 50V
Q4
MMST3904
1
P1
LD7
LED BLUE
2 3
Q3
MMST3904
30.1K 1 PCNT 1/8W
+15V
P1
0.1UF 10 PCNT 50V
3
5.8v
1 2
2 3 6
Q31
MMST3906
4.5v 4.0v 3
C54
1000UF 20 PCNT 35V
C55 P1
1000UF 20 PCNT 35V
D20
IMBD4148
R97
7.50K 1 PCNT 1/10W
TH-B
U7
LM339AM
1
MMST3906
SMT FUSE
F1 W14
J2A
J2A
J2A
J2A
J2A
J2A
J2A
J2A
J2A
J2A
J2A
J2A
R60
R81
47.5K 1 PCNT 1/10W
R96
47.5K 1 PCNT 1/10W
R119
47.5K 1 PCNT 1/10W
AC1
3 P1
-15.8v
2
3
15v WHEN INACTIVE
+5V
R90
1.13K 1 PCNT 1/10W
1
R121
Q36
TIP31C
3
D
J2B J2B J2B
1
13
under the rear heatsink 1.6v U12 1 11 (IDLE) 2 VO V+ GND C52
10
0.1UF 10 PCNT 50V SENSOR
2
2
+3.4v
1
MMST3906
Q33
4.3v idle
D21
IMBD4148
1
C56 BR1
+ AC2 1
XF-12V (YELLOW)
D
+5V
19.3v
R115
2 -
0.1UF 10 PCNT 50V
24V 5.0A
SIG-A
R124
2.00K 1 PCNT 1/10W
SP-A
2
R131 P1
30.1K 1 PCNT 1/8W
47.5K 1 PCNT 1/10W
5.8v
R125
3
R74
1.0M 1 PCNT 1/8W
R107
1.0M 1 PCNT 1/8W
J2B
J2B
J2B
J2B
J2B
J2B
J2B
J2B
J2B
R128
100K 1 PCNT 1/10W
10.0K 1 PCNT 1/10W
R135
10 1 PCNT 1/8W
XF-AUX CT INTERNALLY CONNECTED TO MAIN CT
F2 W15
BRIDGE RECTIFIER
Q37
MMST3904
1 3
R59
30.1K 1 PCNT 1/8W
R86
47.5K 1 PCNT 1/10W
R93
47.5K R91 1 PCNT 274 1/10W 1 PCNT 1/10W
10
11
12
5.3v
A1
A1
P1
3 1 1
Q34
MMST3904
1
7 3.5v
U7
LM339AM
9 3.5v 8 +3v D15
IMBD4148
3
2
20.0K 1 PCNT 1/8W
1.6v
7.50K 1 PCNT 1/10W
FAN SPEED CIRCUIT
P1
-15.8v
-15V
AC-ON
1A-200V
4
1
D22
24V 5.0A
XF-12V (YELLOW)
AUX COIL, 24V CT
SND-A
RET-A
SND-B
RET-B
+15V
CLIP-A SIG-A
SIG-B CLIP-B
TURN ON ON POSITIVE PEAK
0v WHEN INACTIVE
P1
5.3v 14
U7
LM339AM
1 Q32 2
MMST3906
C51
0.22UF 10 PCNT 50V
C53
10UF 20 PCNT 35V
R134
3.01K 1 PCNT 1/10W
IMBD4148
TURN ON ON NEGATIVE PEAK
3
Q10
MMST3906
2
5.3v
6 3v
D6
IMBD4148
A-LIM
R92
2.21K 1 PCNT 1/10W
INPUT BOARD
J3
BALANCED INPUT STAGE (RCA TIP - UNBALANCED) 1.2V NOM INPUT (2V-PK) GAIN -6DB (2VPK = 1VPK)
3
C11
220PF 5 PCNT 50V
4 Vrms when gain is at maximum
AMPLIFIER GAIN BLOCK
R40
1.74K 1 PCNT 1/10W
B-LIM
P1
3K MUTES IN 30MS
AC-ON
C37 R57
3.65K 1 PCNT 1/10W 22PF 5 PCNT 200V
P1
AC-ON
125v
C59
RED POST BLK POST
5
U4
125v
R148
7.50K 1 PCNT 1/10W
+HI
R7
2
R18
10.0K 1 PCNT 1/10W
CH A
0.5 Vrms when gain is at maximum
A1
Gain of 8.86
3
U4
MC33078
7 6
MC33078
R75
7.50K 1 PCNT 1/10W
20.0K 1 PCNT 1/8W
1 2
R32
47.5K 1 PCNT 1/10W
C28
47UF 10 PCNT 10V
C31
22PF 5 PCNT 200V
+15V
2
R22
100K 1 PCNT 1/10W
2 3 3
D5
IMBD4148
CH A
2
W3
1 2
J12
FEMALE 1+ 2+ 121 3
W4
1
22PF 5 PCNT 200V
2 1 3 3
C63
10UF 20 PCNT 35V
1
+15V
R185
100K 1 PCNT 1/10W
+5V
2 1
R141
D27
IMBD4148
CH B
2
R163
10 1 PCNT 1/8W
RED POST
BLK POST
W7 Q62
W8
RET-A
1
JACK
1
1 Vrms, 1k Hz
3
R28
5.90K 1 PCNT 1/10W
C33
220PF 5 PCNT 50V
+5V 1
Q15
50v Q22
MMST3904
50v
C44 60v
10UF 20 PCNT 35V
R101
10 1 PCNT 1/8W
Q30
B-HI
1
B-LO
1
4 1
2
J9
R T S
C80
22PF 5 PCNT 200V
3 2 1
R8 R19
C27 U1
MC33078
R43
R48
69.8K 1 PCNT 1/8W
0v
P2
U10
0.5 Vrms
TRANSCONDUCTANCE OPAMP
JACK
U6
10 12 16
14 15 13
44mv 0.71v
5.90K 1 PCNT 1/10W
R44
1.74K 1 PCNT 1/10W
10PF 5 PCNT 200V
1 2
GND
V+
8 7
7.50K 1 PCNT 1/10W
D18
R71
2.49K 1 PCNT 1/10W
C42
D14
MMST3906
2
R100
24.9K 1 PCNT 1/10W
61.5v
MUR1520
+MID
62v
R114
W1B
3
16v
R68
3
MMBTA42
1 61.5v
3
MTP45N06 MOSFET N-CHANNEL
Q48
MMST3904
Q42
MMBTA42
1 3
MTP45N06 MOSFET N-CHANNEL
JACK
62v
D37
+MID
R116
47.5K 1 PCNT 1/10W
J13
1 Q23
B-HI
B-LO
W2B
0v
HI = ON LO = OFF
IMBD4148 10UF 20 PCNT 35V
C50
W1A SPKR+ (WHITE) 1
W2A SPKR(BLACK) 1
U13
1
P1
GND
V+
8 7
7.50K 1 PCNT 1/10W
R144
2.49K 1 PCNT 1/10W
1 Q49
MMST3906
C61
D32
P-REF
R117
2.00K 1 PCNT 1/10W
1
FEMALE 2 4 1 3 1
R162
24.9K 1 PCNT 1/10W MUR1520
2
2 3
BAL_STR VBAL
R45 A1
21.0K 1 PCNT 1/2W
2.44v 3
P-REF -15V
R42
100 1 PCNT 1/10W
BAL_STR VBAL
6 5 16v
R5 50v D13 P2
21.0K 1 PCNT 1/2W BZX84C10
60v
R89 R80
33.2 1 PCNT 1/8W
1 3 1
C
2
J10
2
FEMALE
20.0K 1 PCNT 1/8W 1
1 3
C12
220PF 5 PCNT 50V
10.0K 1 PCNT 1/10W
9
P-REF -15V
FB-A
44mv
R25
12.7K 1 PCNT 1/10W
4 -16v
10 0.022UF 10 PCNT 1 PCNT 1/8W 50V
6 5
HI = ON LO = OFF
I609
IMBD4148 10UF 20 PCNT 35V
2+
2-
R36
D31
BZX84C10
C66 R160 R157
33.2 1 PCNT 1/8W
1 3 1
R174
R98
0.1 5 PCNT 2W
3
4
R35
100 1 PCNT 1/10W
3
C1
R34
8V INPUT = 94V-OUT R49 R55
A1
39.2K 1 PCNT 1/10W
FEEDBACK
COMPARATOR
R87 R84
100 1 PCNT 1/10W 383 1 PCNT 1/10W
0.1 5 PCNT 2W
D7
1N5399
Q63
2N5064
MAC12HCM
Q65
2
P2
21.0K 1 PCNT 1/2W
R165
0.1 5 PCNT 2W
3
COMPARATOR
R155 R153 R139
2.49K 1 PCNT 1/10W 100 1 PCNT 1/10W 383 1 PCNT 1/10W
2 1
R178
16.5K 1 PCNT 1/2W
3 1 2
R179
10 1 PCNT 1/8W
0.1 5 PCNT 2W
10 0.022UF 10 PCNT 1 PCNT 50V 1/8W
P2
JACK W5B W5A SPKR+ (GRAY) 1
W6B W6A SPKR(BLACK) 1
D35
1N5399
C
3 1
+14V
R63
24.9K 1 PCNT 1/10W
+14V
R130
24.9K 1 PCNT 1/10W
Q66 R181 Q59
2N5064
MAC12HCM 2
C1
NOTE CHASSIS GROUNDS
XLR
SUB - TOP FILTER, 2-POS OUT, 90HZ, 200HZ. CHA = LP, CHB = HP
+5V
R51
10M 1 PCNT 1/8W
4.75K 1 PCNT 1/10W
3
243K 1 PCNT 1/8W
3 1 60.3v
Q9
2SA1837
2
R66
2.49K 1 PCNT 1/10W
Q12
2SA1962
2
Q16
2SA1962
3
Q57
2 1
Q67 3
3
R182
10 1 PCNT 1/8W
Q68
3 1
3
Q64
2N5064
R180 C74
100 1 PCNT 1/8W
1 2
Q50
2SA1837
2
2SA1962
2
2SA1962
FB-B
F4
C25 C10 R20
0.1UF 5 PCNT 100V 2.00K 1 PCNT 1/10W 0.22UF 10 PCNT 50V
1
P1
16.5K 1 PCNT 1/2W
Q2
MMST3906
3
2
2
-14V
1
6 7
J1A C1 U1
J1B
1
-14v WHEN INACTIVE
A1
A-LIM
5.3v 1
Q6
MMST3904
MMST3906
2 3
15.6v R72 1
100 1 PCNT 1/10W
2
Q17
MPSA42
2
2
13.2v 1
13.85v
Q11
60v
D10
BAS21
2
F3
1 2
R183
100 1 PCNT 1/8W
3 1 1 2 3
Q40
MMST3906
D29
BAS21
SP-A
3 15v 2
Q18
MMST3904
R106
69.8K 1 PCNT 1/8W 32V 15A
R132
10 5 PCNT 2W
22UF 20 PCNT 25V
SP-B
R166
69.8K 1 PCNT 1/8W
R145 1
100 1 PCNT 1/10W
Q43
MPSA42
32V 15A
2N5064
C75
22UF 20 PCNT 25V
R1
7.50K 1 PCNT 1/10W
R2
39.2K 1 PCNT 1/10W
R9
39.2K 1 PCNT 1/10W
CUTBACK 5.3v 2 1
R11 Q28
MMST3904
FB-A
1
52.5 Vrms
2
Q38
MMST3904
R171
10 5 PCNT 2W
3
CUTBACK 2
Q44 D33
BAS21
5
2
U3
MC33078
5
D16
BAS21
L1
2UH
7 6
MC33078
C20
2
J1A
J1B
2
SND-A
C36 C34
3
TO SPKR-A
R133 R127
10 5 PCNT 2W 39.2K 1 PCNT 1/10W
R64
39.2K 1 PCNT 1/10W
BIAS DIODES
D1
IMBD4148
1.26v
BIAS DIODES
I859
L2
C13 C2
0.1UF 5 PCNT 100V 0.022UF 5 PCNT 50V
1 2 3
47UF 10 PCNT 10V
3
J1A SW1
DPDT
4
J1B
4
100PF 5 PCNT 50V
P2
1 Q7 2
MMST3906
D3
IMBD4148
C1
NORM-SUB
4 5 6
R82 P2 D4
10 1 PCNT 1/8W
200 1 PCNT 1/10W
2 1 3
P2 Q26
MMST3904
C41
0.0056UF 10 PCNT 200V
R103
931 1 PCNT 1/10W
0v
0.5v D11
15.0K 1 PCNT 1/10W
-14V
C48
0.1UF 10 PCNT 250V
P2
1 Q39
MMST3906
D24
IMBD4148
2
C1
A1
12.7K 1 PCNT 1/10W
10 1 PCNT 1/8W
R111
47UF 20 PCNT 25V
3
12.7K 1 PCNT 1/10W
3
J1A
J1B
47UF 20 PCNT 25V
1
R104
931 1 PCNT 1/10W
1
D23
IMBD4148
MMST3904
R126 P2
10 5 PCNT 2W
1 3
R149
200 1 PCNT 1/10W
R168
931 1 PCNT 1/10W
1
2UH
2
R175
10 5 PCNT 2W
TO SPKR-B
R177
10 5 PCNT 2W
3
R69
3 0.57v R76
3
C58
R142
R12
10 1 PCNT 1/8W
P2 R172
15.0K 1 PCNT 1/10W
Q58
MMST3904
C60
0.0056UF 10 PCNT 200V
2
P2 C4 D25
IMBD4148
R147
10 1 PCNT 1/8W
1
Q54
R164
931 1 PCNT 1/10W
D34
MURS160T3
-14V
C71
0.1UF 10 PCNT 250V
R50 J1A
5
MURS160T3
3
C64
100PF 5 PCNT 50V
J1B
5
8
C1
+14B
J1A
6
+14V
J1B
6
1.00K 1 PCNT 1/8W
R77
200 1 PCNT 1/10W
R150
200 1 PCNT 1/10W
MMST3904
7
CLIP-A
C14
220PF 5 PCNT 50V
IMBD4148
C47
100PF 5 PCNT 50V
R70
12.7K 1 PCNT 1/10W
3 1 Q27 2
MMST3906
IMON-A
R41
7.50K 1 PCNT 1/10W
P2
3 1 Q55 2
MMST3906
IMON-B
R187
7.50K 1 PCNT 1/10W
D2
IMBD4148
3 1
Q5
R108
0.1 5 PCNT 2W
R118
0.1 5 PCNT 2W
R122
0.1 5 PCNT 2W
220PF 5 PCNT 50V
R143
12.7K 1 PCNT 1/10W
D26
IMBD4148
3 1
Q45
MMST3906
R169
0.1 5 PCNT 2W
R173
0.1 5 PCNT 2W
R176
0.1 5 PCNT 2W
2
J1A
7
J1B
7
7.50K 1 PCNT 1/10W
2 1
J1A
8
1 2 3
A1 P1 P2
-13.1v 1
SG1 R65
24.9K 1 PCNT 1/10W
-1.26v
Q14
MMST3904
2
R6
C17
10UF 20 PCNT 35V
PEAK CLAMPS
PEAK CLAMPS
C5
0.1UF 5 PCNT 100V
C6
0.1UF 5 PCNT 100V
3
R10
24.9K 1 PCNT 1/10W
U3
MC33078
C1
C18
10UF 20 PCNT 35V
9
GROUND SCHEDULE
J1A J1B
9
B
-14V
2.49K 1 PCNT 1/10W
100 1 PCNT 1/10W
2 1
Q8
2SC4793
2 2
2
Q20
3
8
3
J1B
-13.85v R67
-15.7v R73 1
2 MMST3906 3 -15v
MPSA92
1
P2 R138 D8
1N5399 24.9K 1 PCNT 1/10W
Q41
MMST3904
2
R146 1
3
MPSA92
P2 Q46 D30
BAS21
D12
BAS21
R140
2.49K 1 PCNT 1/10W
2
R112
2.15K 1 PCNT 1/10W
100 1 PCNT 1/10W
Q51
2SC4793
2
D36
1N5399
+HI 125v
C67
12000UF 20 PCNT 63V
1
Q56
2SC5242
1 2 2
5
R17
2.00K 1 PCNT 1/10W
U2
-14B
7
J1A
10
A1- QUIET REF GND P1 - LOW PWR GND P2 - HIGH PWR GND
Q13
2SC5242
1
1
3
-60.3v
R85
100 1 PCNT 1/10W
3
-14V
C78 R184
29.4K 1 PCNT 1/10W
Q19
2SC5242
3
+15V
16v
-60.8v
3
-14V N-REF
R186 C79
0.1UF 10 PCNT 50V 29.4K 1 PCNT 1/10W
+15V
R154
100 1 PCNT 1/10W
1
Q60
2SC5242
1
W13
62v
+MID
XF-CT (GRAY)
W12
B
3
R113 R99
0.1 5 PCNT 2W 47.5K 1 PCNT 1/10W
C1
J1B
10
+5V
R78
2.49K 1 PCNT 1/10W
R88
383 1 PCNT 1/10W
R83
33.2 1 PCNT 1/8W
R94
0.1 5 PCNT 2W
+5V
HI = ON
R156
383 1 PCNT 1/10W
R158
33.2 1 PCNT 1/8W
R159
0.1 5 PCNT 2W
3
R167
0.1 5 PCNT 2W
6
MC33078
C68 D38
MUR1520 12000UF 20 PCNT 63V
1
C76
0.1UF 10 PCNT 200V
C1 C19
11
A1 J1A J1B
11
SND-B
0.1UF 10 PCNT 50V
XF-44V (ORANGE)
D17
MUR1520
C7
220PF 5 PCNT 50V 47UF 10 PCNT 10V
U11
V+
N-REF
J1A
12
J6
R T S
BAL_STR VBAL
3 2 1
20.0K 1 PCNT 1/8W
10.0K 1 PCNT 1/10W
4
5
COMPARATOR
2
MC33078
B-LIM
CLIP-LIM THRESHOLD
2 -124.5v D9
IMBD4148
AC2
-15V
1
-16v
16v
P2
1
MMBTA92
3 4
V-
BAL_STR BAL
6 1 5
P1
3
MMBTA92
AC1
R3
R15 C1
J1B
12
A1
1 P2 2 -2.27v 3
GND
8 7 6
HI = ON LO = OFF
U14
V+
R151
C43
C49
0.022UF 10 PCNT 50V
87mV
3
Q21
22PF 5 PCNT 200V 10 1 PCNT 1/8W
-62v
7
22PF 5 PCNT 200V
0.022UF 10 PCNT 50V
10 1 PCNT 1/8W
12000UF 20 PCNT 63V
2 -
3
R109
-MID
N-REF
1 P1 2
GND
8
LO = OFF
2.49K 1 PCNT 1/10W
C62
C65
R170
P2 C69 BR2
+ 1
C77
0.1UF 10 PCNT 200V
R136
10 1 PCNT 1/8W
2 1 3 3 1 Q25
MMST3906
Q47
2 1
Q52
MMBTA42
Q24
MMBTA42
JACK
-125v
R79
5.90K 1 PCNT 1/10W
R95
10 1 PCNT 1/8W
1 3
J7
2
3
1
1 3
C26 U2 R16
10.0K 1 PCNT 1/10W 0.22UF 10 PCNT 50V
MTP45N06 MOSFET N-CHANNEL
3
R152
R161
10 1 PCNT 1/8W
1 3
R52
10M 1 PCNT 1/8W
+5V
R30
4.75K 1 PCNT 1/10W
3
R27
5.90K 1 PCNT 1/10W
1 3
R47 P1
39.2K 1 PCNT 1/10W
Q1
MMST3906
2
FEMALE
3
R4
20.0K 1 PCNT 1/8W
-14V
C1 U6
R53
243K 1 PCNT 1/8W
2
-124.5v
-125v
5.90K 1 PCNT 1/10W
1 2
3
2
3
MTP45N06 MOSFET N-CHANNEL
4
2 -61.5v Q29
-15V
COMPARATOR
2
IMBD4148
-62v
2
Q61
-MID
C70
12000UF 20 PCNT 63V
W11
D28
1
W10
BRIDGE RECTIFIER
XF-44V (RED) XF-88V (VIOLET)
1
C72 BR3
+ AC2 1
25A-600V
Q53
MMST3906
2 -
0.1UF 10 PCNT 200V
AC1
C73
0.1UF 10 PCNT 200V
-125v
-HI
BRIDGE RECTIFIER
XLR
C1
C8
220PF 5 PCNT 50V
7
5 1
2 4
R37
100 1 PCNT 1/10W
R137
4
TRANSCONDUCTANCE OPAMP
8
C35
220PF 5 PCNT 50V I892
25A-600V
R62 P1
NOTE
CHASSIS GROUNDS
10 1 PCNT 1/8W
W9
R24
12.7K 1 PCNT 1/10W
R31
100 1 PCNT 1/10W
CH B
+14B 8 8 8
U1
MC33078
C57
100PF 5 PCNT 50V
CLIP-B
1
XF-88V (BROWN)
R61 A1 C32
47UF 10 PCNT 10V
R38
5
U5
69.8K 1 PCNT 1/8W
3.65K 1 PCNT 1/10W
RET-B
C3
0.1UF 10 PCNT 50V
R26
5.90K 1 PCNT 1/10W
47.5K 1 PCNT 1/10W
7 6
MC33078
R129
1.00K 1 PCNT 1/8W
C9
22PF 5 PCNT 200V
U2
MC33078
U3
MC33078
R29
1.74K 1 PCNT 1/10W
C1
A
0.1UF 10 PCNT 50V
2
C30
22PF 5 PCNT 200V
1 3
A1 U5
MC33078
-14B
8V INPUT = 94V-OUT
FEEDBACK
+14V MAIN BOARD OPAMP BYPASS CAPS
C21
11
C29
10PF 5 PCNT 200V
R21
33.2 1 PCNT 1/8W
+15V
3
Troubleshoot notes: 1. Power specs: a. 8 ohm: 500 W = 63 Vrms, Input sen = 1.2 Vrms b. 4 ohm: 700 W = 52.5 Vrms, Input sen = 1.00 Vrms 2. Output gain: 34.4 dB = 52.5 Vrms 3. Idle current: 0.3A; short limit current: 3.3A /CH, 6A /2CH (120V unit) 4. Amplifier would start with an AC voltage above 50 V.
4
4
4
A
CONTRACT NO.
R39 A1
1.74K 1 PCNT 1/10W
I268
FB-B
8
0.1UF 10 PCNT 50V
R56 U6
6
8
C15
470UF 20 PCNT 16V
U7
LM339AM
TRANSCONDUCTANCE OPAMP
MC33078
MC33078
C22
470UF 20 PCNT 16V
P1 R23
33.2 1 PCNT 1/8W
12
21.0K 1 PCNT 1/2W
U4
C16
0.1UF 10 PCNT 50V
U5
P1
PROTECTION AND LIMITING PARADIGM CLIP-LIMITING SINGLE-SIDED, SLOW ATTACK/RELEASE TRIGGERS ON CLIP AND NEARLY FULL CURRENT NORMAL CURRENT CLAMPING TRIGGERS CLIP-LIMITING SOA OVERLOAD CURRENT TOO HIGH WELL BELOW RAILS MILD/OCCASIONAL OK - NO EFFECT SEVERE TRIGGERS CUTBACK TO 25% PK CURR
AUDIO PRODUCTS, LLC.
COSTA MESA, CALIFORNIA
APPROVALS DRAWN DATE
SCHEMATIC DIAGRAM
GX5 AMPLIFIER
SIZE CAGE CODE DWG NO. REV
4
4
-15V
ON/OFF AND THERMAL MUTING COMMON TO BOTH CHANNELS THERMAL LIMIT MUTES SEVERAL DEGR ABOVE MAX LIMITING
PAT QUILTER
06/06/2007
CHECKED
DAVID GALVAN 02/27/2008
-14V
ISSUED
AI1
1
AI Target
1
SI1
1
SI Target
BT1
1
Board Target
BT2
1
Board Target
FB1
Board Fiducial
FB2
1
Board Fiducial
DENISE DELARM
03/05/2008
SEED FILE NO.
G3.SCH
PLOT DATE:
D
00PW4
SH-300001-00
AR-300001-00-B.ZIP
B B
SHEET 1 OF
1
NOTES: UNLESS OTHERWISE SPECIFIED
SCALE NONE
CAD FILE NO.
8
7
6
5
4
3
2
1