68
D
C
B
A
D
C
B
A
87654321
87654321
QSC AUDIO PRODUCTS.
WITHOUT EXPRESS WRITTEN CONSENT FROM
BE DISCLOSED, REPRODUCED OR USED
OF QSC AUDIO PRODUCTS, THAT MAY NOT
INFORMATION WHICH IS THE PROPERTY
THIS DOCUMENT CONTAINS PROPRIETARY
SIZE FSCM NO. DWG NO.
SCALE CAD FILE NO. SHEET
REV
D
DWG NO.
REV SH
P
5
J6:5
PWR GND
R4
4.75K
^R_0805
C4
470pF
^C_1206
5
J5:5
Q4
3906
^Q_BJTP_SOT-23
N119
6
J5:6
RED
LD5
6
J6:6
4148
^D_SOT-23
D1
LD3
GRN
LD4
GRN
Q1
3906
^Q_BJTP_SOT-23
Q2
3906
^Q_BJTP_SOT-23
Q3
3906
^Q_BJTP_SOT-23
3904
Q5
^Q_BJTN_SOT-23
R3
4.75K
^R_0805
R7
1.00K
^R_1206
N112
N113
N114
N115
N122
N127
N124
R20
^R_0805
39.2K
Q6
3906
^Q_BJTP_SOT-23
N118
N116
N126
R27
100
^R_0805
7
J6:7
R18
20.0K
^R_0805
R21
100
^R_0805
R24
392K
^R_0805
3
+
8
7 5
1
4
-
2
U3:1
LM13600M
^U_LM13600
N130
C3
10-35V
4148
^D_SOT-23
D2
N121
N131
7
J5:7
LD1
YEL
N30
+14_DISP
LED-SIGNAL DISPLAY
N110
N111
8
J5:8
PARALLEL
INPUT SW.
STATUSLED
N31
4
J6:4
R1
1.00K
^R_1206
N29
2
J6:2
3
J6:3
1
J6:1
N32
N33
2
J5:2
3
J5:3
1
J5:1
CWCCW
W
VR2
10K-THRU-PCB
C9
100pF-50V-5%
^C_0805
C11
47-10NP-10%
A1
A1
R10
4.75K
^R_0805
R11
4.75K
^R_0805
R14
12.7K
^R_0805
R16
12.7K
^R_0805
R22
536
^R_0805
N35
N37
N39
3
+
2
-
1
NE5532
U2:1
A1
R15
7.50K
^R_0805
N34
N36
CH_A_SIG
+14VIC
8
J6:8
R23
1.50K
^R_0805
N38N123
N125
R19
12.7K
^R_0805
5
J3:5
1 11
DIP-10
SW1:1
+13IN
5
J4:5
R31
16.5K-1/2W-1%
C17
470pF-50V-5%
^C_1206
R38
7.50K
^R_0805
+13VCL
P1
5
+
6
-
7
U2:2
NE5532
U_OPAMP_DUAL1
+14VIC
-14VIC
C14
10pF-50V-5%
^C_0805
R29
5.90K
^R_0805
R37
475
^R_0805
84
N40
N41
N42
4148
D5
^D_SOT-23
N43
D4
4148
^D_SOT-23
SPKR_BUS_A
N92
N91
Q16
300V-.2A
^Q_BJTN_SOT-23
Q17
300V-.2A
^Q_BJTP_SOT-23
P
MUTE+
N90
C18
100pF-50V-5%
^C_0805
N88
FULL MUTE, 5.7V
C22
47-50V
P
R53
100K
^R_1206
N97
4148
D89
^D_SOT-23
MUTE_HI
R48
2.00K
^R_0805
N89
R46
12.7K
^R_0805
-15NTC
R106
12.7K
^R_0805
C20
.0027
^C_0805
N87
N129
-13VCL
P
P
^Q_BJTN_SOT-23
Q7
3904
R32
1.50K
^R_0805
R35
1.50K
^R_0805
R39
1.50K
^R_0805
R44
383
^R_0805
N132
3904
Q8
^Q_BJTN_SOT-23
N134
N133
^Q_BJTN_SOT-23
3904
Q9
Q10
3906
^Q_BJTP_SOT-23
Q12
3906
^Q_BJTP_SOT-23
R33
100K
^R_0805
R34
1.50K
^R_0805
R42
1.00K
^R_1206
R28
475
^R_0805
N128
N135
N136
N137
DC_SENSE
3904
Q15
^Q_BJTN_SOT-23
CLIP_A
^Q_BJTN_SOT-23
Q13
3904
R50
30.1K
^R_1206
N139
PROT
N98
NEGREF
N138
R47
2.21K
^R_0805
N140
C19
.1-50V-10%
^C_1206
P
^R_1206
30.1K
R49
+13VCL
12
J6:12
10
J4:10
A-10, LED-PAR
+XLR_B
N23
-XLR_B
N22
N28
N27
+13IN
A-20, +13V
20
J4:20
N24
N25
20
J3:20
10
J3:10
12
J5:12
414
SW1:4
DIP-10
5 15
DIP-10
SW1:5
6 16
DIP-10
SW1:6
N14
C1
470pF-50V-5%
^C_1206
A1
R6
75
^R_0805
N2
A-1 GND
4
J4:4
N3
4
J3:4
1
J3:1
1
J4:1
S
T
R
J1
+IN_DPA
N6
C2
470pF-50V-5%
^C_1206
C195
.001-5%
^C_1206
1
3
2
J2
TIP 2
J4:2
2
J3:2
-14VIC
7
J4:7
8
J4:8
9
J4:9
R17
4.75K
^R_0805
84
3
+
2
-
1
U1:1
MC33078-SMT
N9
N11
N15
N18
N19
N20
C10
.22-50V-5%
R26
47.5K
^R_0805
N16
8
J3:8
9
J3:9
7
J3:7
R13
5.60K-.1%
R8
5.60K-.1%
313
DIP-10
SW1:3
SIGNAL
POLARITY
INVERTED
C8
.1-5%
C12
.1-5%
N10
C6
100pF-50V-5%
^C_0805
47-10NP-10%
C7
DP-PAR-F
N26
A1
6
J4:6
A-6, GND
N463
6
J3:6
212
DIP-10
SW1:2
-IN_DPA
NEG INPUT
+IN_CH-A-IN_CH-A
+14VIC
C5
100pF-50V-5%
^C_0805
A1
R5
75
^R_0805
N4
N5
N7
N8
N12
3
J4:3
N1
3
J3:3
R9
5.60K-.1%
R12
5.60K-.1%
POSREF
R55
4.75K
^R_0805
N13
N17
N54
R25
15.0K
^R_0805
R52
150K
^R_1206
CWCCW
W
VR43
250
N473
C15
100-25V
R36
12.7K
^R_0805
R41
1.50K
^R_0805
P
N45
R101
1.50K
^R_0805
N44
N21
D3
^D_SOT-23
4148
N230
5
+
6
-
7
U1:2
MC33078-SMT
N46
NTCBUS
N47
N51
R56
4.75K
^R_0805
TH-SUBC-A
C21
47-50V
R54
150K
^R_1206
N48
+15NTC
N49
N64
Q14
3906
^Q_BJTP_SOT-23
R45
12.7K
^R_0805
N50
P
R51
100K
^R_1206
D10
4148
^D_SOT-23
D14
4148
^D_SOT-23
D16
^D_SOT-23
200V-.2A-50NS
^Q_BJTN_SOT-23
3904
Q18
2N3904
Q20
^Q_BJTP_SOT-23
Q24
3906
R73
100K
^R_1206
N78
N83
4148
D9
^D_SOT-23
N79
R60
39.2K
^R_0805
2SC4793
Q19
N65
+15NTC
C179
.1-50V
^C_1206
P
R381
100
^R_0805
N477
N70
N67
N68
10V-1N4740A
D7
.36W at full clip
R72
2.21K
^R_0805
R59
4.75K
^R_0805
R81
200
^R_0805
R76
39.2K
^R_0805
R67
274
^R_0805
N66
C23
.0027
^C_0805
2
3
4
V-
1
GND
8
V+
5
BAL
6
BAL/STR
7
^LM311-SMT
U4
N58
R97
R94
R91
R88
N72
R105
3.9K-2W
P
R115
1.5-2W
R113
.47-2W
R111
R107
R102
8PL
N74
N73
N81
N77
N71
Q26
MJE15033
L-Z_A1
D19
1N5402
N82
SPKR-A
D
N80
Q28
2SA1302
Q34
2SA1302
Q36
2SA1302
Q39
2SA1302
1 2
L1
2UH-14GA-AIR
D6
3.9V
4148
^D_SOT-23
D15
R66
392K
^R_0805
N52
N53
N55
N56
R78
5.90K
^R_0805
R79
3.01K
^R_0805
C30
47pF-50V-5%
^C_0805
C31
10-35V
D18
4148
^D_SOT-23
^Q_BJTN_SOT-23
3904
Q30
^Q_BJTP_SOT-23
3906
Q31
RFZ44
Q41
R104
12.7K
^R_0805
N59
N60
R110
47.5
^R_0805
N62
N63
N61
+MID-RAIL
EMI_G
C129
.1-250V
N76
C34
.1-250V
N75
N459
R63
4.75K
^R_0805
R64
4.75K
^R_0805
R69
392K
^R_0805
N143
C177
.1-50V-10%
^C_1206
R57
150K
^R_1206
R58
150K
^R_1206
2
3
4
V-
1
GND
8
V+
5
BAL
6
BAL/STR
7
^LM311-SMT
U5
R83
5.90K
^R_0805
N141
R77
39.2K
^R_0805
D8
4148
^D_SOT-23
R68
274
^R_0805
R82
200
^R_0805
N99
C24
.0027
^C_0805
N145
R75
2.21K
^R_0805
N396
R2
47.5K
^R_0805
C187
47pF-50V-5%
^C_0805
N146
V-NEGSTEP
R89
R92
R95
R99
R103
R108
R112
R114
.47-2W
R116
1.5-2W
R86
15-2W
N105
N107
N106
-HI-RAIL
C29
47pF-50V-5%
^C_0805
4148
^D_SOT-23
D17
^Q_BJTN_SOT-23
3904
Q32
Q33
3906
^Q_BJTP_SOT-23
RFZ44
Q38
R100
47.5
^R_0805
N142
N147
N148
R84
2.21K
^R_0805
N478
N94
P
^Q_BJTP_SOT-23
Q23
3906
R74
100K
^R_1206
N101
R61
39.2K
^R_0805
Q25
3904
^Q_BJTN_SOT-23
D12
4148
^D_SOT-23
N100
200V-.2A-50NS
^D_SOT-23
D13
N95
4148
^D_SOT-23
D11
MJE15032
Q27
^R_0805
100
R382
C180
.1-50V
^C_1206
2SA1837
Q22
-15NTC
N96
R70
75
^R_0805
N84
R71
75
^R_0805
2N3906
Q21
SPKR_BUS_A
N85
680pF
^C_0805
C25
C26
470pF
^C_1206
R80
5.6-2W
C27
.022
R65
12.7K
^R_0805
C28
.1-250V
E9A
E10A
P P1
N86
R87
15-2W
R90
15-2W
R93
15-2W
R367
15-2W
R98
5.6-2W
N466
Q29
2SC3281
N103
N102
N104
Q37
2SC3281
D20
1N5402
Q40
2SC3281
E9C
E9B
E10B
2+
1+
2-
1-
J7
JACK-SPEAKON
N461
BR-NEG
E10C
N462
-MID-RAIL
N109
N108
.1-250V
C35
D21
15A-200V
C
plx2402.sch
C
CLIP
LD2
GRN
116
N120
SH 3
4
J5:4
GAIN
SIGNAL
POLARITY
INVERTED
SH 4
BR MONO FEED, SH 3
C16
15pF
A-5, CLIP A
SEE SH 3
SH 4
C13
^C_E_ALUM_B
1-50V
CLIP-LIMIT
PROCESSOR
SH 3
DATAPORT, SH 4, CLIP A
SH 4
DATAPORT CONNECTED TO INPUT
AS USUAL TO MINIMIZE CROSSTALK
WHEN USING REGULAR INPUTS
INPUTS IN PARALLEL
-SH3
A-2 +A
A-3 -A
POS INPUT
A-4, GND
A-8, LF-30
A-9, LF SIG
DISCUSS STAR GND
R-parallel, 7.5K, 10K, 4.7K, = 2.24K
2 POLE CASCADED ROLLOFF
-0.15dB, 20Hz. -0.4dB, 10Hz.
SH 4
INPUT AND FILTER SECTION, CH A
RING
SH 4, EURO-INPUTS
POS STEP DRIVER
DIP SWITCH TABLE, 10-POS
1 - CLIP LIM, CH-A
2 - LF FILT, CH-A
3 - 30 HZ LF, CH-A
4 - PAR INPUT LED
5 - PAR INPUTS, +
6 - PAR INPUTS, -
7 - BR MONO
8-30HZLF,CHB
9 - LF FILT, CH B
10- CLIP LIM CH B
10K RE-230
R30
ROUTE TO SPKR OUTPUT.
R226 = 5.90K for PLC-2
THERMAL
AND BIAS
SENSING
A-7, LF-ON
SIGNAL
POLARITY
INVERTED
AMP LOOP GAIN -- 32DB REVISION
USE SAME VALUE AS PLC-2
POS OUTPUT SECTION
R85
15-2W
R96
3.9K-2W
C32
100-25V
I-MON SH 4
N57
+HI-RAIL
D22
15A-200V
NEG STEP DRIVER
N144
R62
4.75K
^R_0805
NEG OUTPUT SECTION
8PL
N93
PWR-GND, TO SUPPLY CT
Q35
2SC3281
BR-POS
FROM CH B
SHEET 3
2OF5
NONE
2 SH-002403-00
SH-002403-00
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