63
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
6
J6:6
5
J6:5
LD5
RED
N119
R4
4.75K
^R_0805
C4
470pF
^C_1206
6
J5:6
5
J5:5
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
Q4
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
N127
N122
N124
116
R27
100
^R_0805
R20
^R_0805
39.2K
Q6
3906
^Q_BJTP_SOT-23
N118
N116
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
N120
N121
N131
7
J5:7
+14_DISP
LD1
YEL
N30
LED-SIGNAL DISPLAY
LD2
GRN
N110
N111
8
J5:8
R1
1.00K
^R_1206
N29
PARALLEL
INPUT SW.
STATUSLED
2
J6:2
3
J6:3
1
J6:1
N32
N33
2
J5:2
3
J5:3
1
J5:1
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
N36
N37
N39
3
+
2
-
1
NE5532
U2:1
8
J6:8
R23
1.50K
^R_0805
N38N123
N125
R19
12.7K
^R_0805
N126
5
J3:5
1 11
DIP-10
SW1:1
CH_A_SIG
SH 4
BR MONO FEED, SH 3
+13VCL
+13IN
5
J4:5
R31
16.5K-1/2W-1%
C17
470pF-50V-5%
^C_1206
R38
7.50K
^R_0805
SPKR_BUS_A
-14VIC
+14VIC
5
+
6
-
7
U2:2
NE5532
U_OPAMP_DUAL1
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
N92
Q16
300V-.2A
^Q_BJTN_SOT-23
Q17
300V-.2A
^Q_BJTP_SOT-23
P
N90
C18
100pF-50V-5%
^C_0805
N88
N91
C22
47-50V
P
N97
4148
D89
^D_SOT-23
R48
2.00K
^R_0805
N89
R46
12.7K
^R_0805
R106
12.7K
^R_0805
3904
Q15
^Q_BJTN_SOT-23
C20
.0027
^C_0805
N87
R53
150K
^R_1206
MUTE_HI
SH 4
-13VCL
N129
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
^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
N133
N135
N136
N137
^Q_BJTN_SOT-23
Q13
3904
N138
N139
N98
R50
20.0K
^R_1206
DC_SENSE
NEGREF
CLIP_A
DATAPORT, SH 4, CLIP A
SH 3
SH 4
R47
2.21K
^R_0805
N140
C19
.1-50V-10%
^C_1206
P
^R_1206
20.0K
R49
4
J6:4
12
J6:12
10
J4:10
A-10, LED-PAR
N31
N23
N22
N28
N27
20
J4:20
N24
N25
20
J3:20
10
J3:10
4
J5:4
12
J5:12
414
SW1:4
DIP-10
5 15
DIP-10
SW1:5
6 16
DIP-10
SW1:6
-XLR_B+XLR_B
+13VCL
INPUTS IN PARALLEL
-SH3
4
J4:4
N14
N2
N3
1
J4:1
A-4, GND
C1
470pF-50V-5%
^C_1206
A1
R6
75
^R_0805
N6
C2
470pF-50V-5%
^C_1206
C195
.001-5%
^C_1206
S
T
R
J1
4
J3:4
1
J3:1
1
3
2
J2
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
C6
100pF-50V-5%
^C_0805
47-10NP-10%
C7
A1
R15
7.50K
^R_0805
N34
N26
A1
6
J4:6
A-6, GND
N463
6
J3:6
212
DIP-10
SW1:2
C5
100pF-50V-5%
^C_0805
C8
.1-5%
C12
.1-5%
A1
R5
75
^R_0805
N4
N5
N7
N8
N12
3
J4:3
2
J4:2
N1
N10
2
J3:2
3
J3:3
R9
5.60K-.1%
R12
5.60K-.1%
-IN_CH-A +IN_CH-A -IN_DPA
SH 4, EURO-INPUTS
N13
N17
N54
R25
15.0K
^R_0805
N473
C15
100-25V
R41
1.50K
^R_0805
P
N45
R101
1.50K
^R_0805
N44
10K RE-230
R30
R36
9.09K
^R_0805
NTCBUS
5
+
6
-
7
U1:2
MC33078-SMT
N21
N46
N47
D3
^D_SOT-23
4148
N230
N51
C21
47-50V
Q14
3906
^Q_BJTP_SOT-23
N48
N49
N64
N50
P
R45
15.0K
^R_0805
R51
150K
^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
C179
.1-50V
^C_1206
P
R381
100
^R_0805
N477
+15NTC
N68
N67
N70
R59
6.34K
^R_0805
C23
.0027
^C_0805
R67
274
^R_0805
N66
R76
12.7K
^R_0805
R81
274
^R_0805
R72
1.62K
^R_0805
R97
R94
R91
R88
N72
P
PLC-2 USES MID-RAILS ONLY:
JUMP STEP DIODES
OMIT STEP CIRCUITRY
+15-NTC SUPPLY SERVES AS POS BLEEDER
R113
.47-2W
R111
R107
R102
8PL
N74
N73
N81
N77
N71
Q26
MJE15033
D19
1N5402
N82
D
N80
Q28
2SA1302
Q34
2SA1302
Q36
2SA1302
Q39
2SA1302
1 2
L1
2UH-14GA-AIR
L-Z_A1
I-MON SH 4
N52
N53
N55
N56
N58
N59
N60
N62
N63
N61
+HI-RAIL
E9C
C129
.1-250V
N76
N75
N459
D22
JUMPER
BR-POS
+MID-RAIL
N141
N143
N144
R82
274
^R_0805
C24
.0027
^C_0805
D8
4148
^D_SOT-23
R68
274
^R_0805
R75
1.62K
^R_0805
N145
R62
6.34K
^R_0805
N146
R89
R92
R95
R99
R103
R108
R112
R114
.47-2W
R86
15-2W
N142
N147
N148
^Q_BJTP_SOT-23
Q23
3906
R74
100K
^R_1206
N101
N99
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
N96
R77
12.7K
^R_0805
N93
N84
2N3906
Q21
N85
680pF
^C_0805
C25
C26
470pF
^C_1206
R80
5.6-2W
C27
.022
R65
12.7K
^R_0805
P
N94
N478
R70
100
^R_0805
R71
100
^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
N105
N103
N102
N104
D20
1N5402
N107
N106
Q40
2SC3281
E10B
2+
1+
2-
1-
J7
JACK-SPEAKON
N461
E10C
N462
N109
N108
D21
JUMPER
-MID-RAIL
plx1602.sch
B
B
CLIP
PWR GND
SH 3
CWCCW
W
VR2
10K-THRU-PCB
GAIN
SIGNAL
POLARITY
INVERTED
+14VIC
C16
15pF
A-5, CLIP A
P1
MUTE+
SEE SH 4
-15NTC
C13
^C_E_ALUM_B
1-50V
CLIP-LIMIT
PROCESSOR
PROT
DATAPORT CONNECTED TO INPUT
AS USUAL TO MINIMIZE CROSSTALK
WHEN USING REGULAR INPUTS
A-20, +13V
+13IN
A-3 -A
A-1 GND
A-2 +A
POS INPUT
+IN_DPA
A-8, LF-30
A-9, LF SIG
-14VIC
DISCUSS STAR GND
R-parallel, 7.5K, 10K, 4.7K, = 2.24K
2 POLE CASCADED ROLLOFF
-0.15dB, 20Hz. -0.4dB, 10Hz.
DP-PAR-F
SH 4
INPUT AND FILTER SECTION, CH A
NEG INPUT
RING
TIP
SIGNAL
POLARITY
INVERTED
+14VIC
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
POSREF
CWCCW
W
VR43
250
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
TH-SUBC-A
FULL MUTE, 5.7V
+15NTC
SPKR_BUS_A
POS OUTPUT SECTION
.36W at full clip
R85
15-2W
SPKR-A
N57
EMI_G
NEG STEP DRIVER
NEG OUTPUT SECTION
8PL
V-NEGSTEP
-HI-RAIL
-15NTC
PWR-GND, TO SUPPLY CT
Q35
2SC3281
Q37
2SC3281
E9B
BR-NEG
FROM CH B
SHEET 3
2
NONE
2OF5
SH-000516-00
SH-000516-00
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