71
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
PRI_LO
N444
R331
20.0K
^R_0805
6
-
7
+
1
LM339
U13:2
N446
10
-
11
+
13
LM339
U13:4
R330
4.75K
^R_0805
R369
1.00K
^R_1206
C192
10-35V
PRI_LO
C128
.0027
^C_0805
R322
487K
^R_1206
C109
.0027
^C_0805
C108
.0027
^C_0805
8
-
9
+
14
LM339
U13:3
R325
24.9K
^R_0805
R323
39.2K
^R_0805
N418
C107
.1-400V
R321
487K
^R_1206
MURS160T3
D58
^D_SMB
N416
N417
+VREF
C114
10-35V
PRI_LO
NON CRIT BYPASS
N411
N410 N409
R328
487K
^R_1206
.001-5%
^C_1206
C120
N408
N419
D91
4148
^D_SOT-23
PRI_LO
C119
470pF-50V-5%
^C_1206
R332
39.2K
^R_0805
N471
C121
470pF-50V-5%
^C_1206
D60
MURS160T3
^D_SMB
R345
100K
^R_1206
N420
R340
392K
^R_0805
+16V
312
4
-
5
+
2
LM339
U13:1
C125
.1-50V-10%
^C_1206
N421
R344
100K
^R_1206
PRI_HI
R376
10.0K
^R_0805
10V-.3W
^D_ZEN_SOT-23
D66
4148
^D_SOT-23
D67
N424
N423
R374
536
^R_0805
N453
R349
39.2
^R_1206
P2P1
T1:1
N422
XF-PRI
Q99
3906
^Q_BJTP_SOT-23
R375
10.0K
^R_0805
PRI_LO
R348
2.21K
^R_0805
1
S
2
N/C
3
N/C
4
C
5
D
6
N/C
7
N/C
8
S
U16
TOP 210
R356
10.0
^R_1206
100-25V
C142
N476
R343
150K
^R_1206
PRI_LO
R338
10.0K
^R_0805
R337
12.7K
^R_0805
D61
^200V-.2A-50NS
^D_SOT-23
R346
20.0K
^R_0805
3 4
L6:2
R341
150K
^R_1206
R342
150K
^R_1206
N447
N445
R336
10.0K
^R_0805
+16V
PRI_LO
3
1
2
6
4
5
NC
NC
U15
N448
C135
.1-50V-10%
^C_1206
+16V
R347
2.21K
^R_0805
N450
V-STBY
N455
DC-OFF
10.0
^R_1206
R353
N454
D68
^200V-.2A-50NS
^D_SOT-23
ISOL WINDING - 6V
S7 S8
T1:3
PRI_LO
C131
470-16V
Q95
3904
^Q_BJTN_SOT-23
3
1
2
6
4
5
NC
NC
U17
N449
N451
PS-OL
+6 V
PRI_LO
4148
^D_SOT-23
D59
Q92
3904
^Q_BJTN_SOT-23
Q93
3904
^Q_BJTN_SOT-23
N406
N373
N371
2
1
J20
N372
24
L3:2
C115
.0033 250VAC
24
L4:2
NTC: WRONG P/N:
PATTERN OK
NEW VALUE
10 OHMS, 180 JOULES
N309
E11
C118
.0033 250VAC
N377
+VREF
N375
+VREF
^Q_BJTP_SOT-23
Q94 3906
R327
4.75K
^R_0805
R329
12.7K
^R_0805
R334
100
^R_0805
147
N407
N412
N413
N414
N415
R333
150K
^R_1206
R335
150K
^R_1206
N368
EH1
EH2
N378
INRUSH LIMITING RELAY.
QSC-COM, 30A, COIL 24V
MIN VOLT 18V, OK
N376N374N369
2
1
J19
10-OHM-20%
R324
13
L3:1
13
L4:1
R339
750K-1/2W
.47-250VAC
C117
C110
1.0 250VAC
C112
1.0 250VAC
R371
750K-1/2W
F1
25A-125V
E120B
C126
.1-250V-X
ES2
ES1
N380
N383
N382
1
2
4
6
5
3
NC
NO
{Value}
K1
2
AC1
1
+
4
-
3
AC2
BR1
600V-50A
C132
2200-200V
2200-200V
C136
PRI_HI
N385
R351
30K-2W
P5
P6
P7
P3
P2
P1
T2:1
XF-79
12
11
8
10
9
13
COMP
FLIP-FLOP
COMP
THRESHOLD
CONTROL_V
OUTPUT
TRIGGER
RESET
DISCHARGE
U14:2 LM556-SMT
N384
EL1
E240
E120A
120V, VOLT
DOUBLER
240V, FULL
WAVE RECT
120V, PAR
RECT DIODES
PRI_LO
C122
.0022-250VAC
C137
2200-200V
C133
2200-200V
E14
IGBT HEAT SINK
PRI_LO
N370
R373
5.6-2W
N458
C123
.1-400V
N428 N427
+18V
N426
PRI_LO
100-25V-105C
C138
N117
4148
^D_SOT-23
D65
4148
^D_SOT-23
D64
4148
^D_SOT-23
D63
D62
MURS120T3
S3 S4
T1:2
N429
N430
D72
30A-400V
D_TO247AD
D84
30A-400V
D74
15A-200V
D71
MUR440
^200V-.2A-50NS
^D_SOT-23
D79
N392
R355
5.6-2W
N389
C146
330p-500V
C113
.0033
R372
56-2W
N472
G
CE
Q97
IRG4PC50U
1
LO
7
HO
2
COM
3
VCC
5
VS
6
VB
9
VDD
10
HIN
11
SD
12
LIN
13
VSS
14
8
4
U18
IR2110
PRI_LO
N395
R358
^R_1206
10.0
C162
.1-50V-10%
^C_1206
C151
470-63V
C158
470-63V
C164
470-63V
C168
470-63V
1 2
L7
6UH-BEAD
1 2
L8
6UH-BEAD
1 2
L9
6UH-BEAD
N435
N436
N437
^200V-.2A-50NS
^D_SOT-23
D78
R354
5.6-2W
N388
D70
MUR440
N387
C145
330p-500V
N386
.47-400V
C144
1 2
L6:1
+16V
D86
MURS160T3
^D_SMB
N390
N391
N394
C155
.1-50V-10%
^C_1206
C163
.1-50V-10%
^C_1206
PRI_LO
+VREF
+16V
+VREF
N397
N400
N401
N402
C183
.1-50V-10%
^C_1206
C185
.1-50V-10%
^C_1206
R362
4.75K
^R_0805
Q98
3906
^Q_BJTP_SOT-23
N439
N440
C172
470-63V
+MID-RAIL
+HI-RAIL
N403
N399
N398
12
GND
15
VIN
16
VREF
14
OUTB
13
VC
11
OUTA
10
SHTDWN
9
COMP
8
SFT-SRT
7
DISCHG
6
RT
5
CT
4
OSC.OUT
3
SYNC
2
+IN
1
-IN
SG3525AN
U19
^R_0805
100
R364
PRI_LO
PRI_LO
N404
N405
C186
470pF-50V-5%
^C_1206
R365
15.0K
^R_0805
^C_1206
C116
.1-50V-10%
R366
10.0K
^R_0805
PRI_LO
100-25V-105C
C149
N452
P
C143
100-25V
P1
-15V
C157
.1-250V
C156
.1-250V
NEW, LO-ESR, 2PL
N456
R357
39.2
^R_1206
D83
MURS120T3
^D_SMB
D82
MURS120T3
D77
MURS120T3
C148
470pF-50V-5%
^C_1206
15V-SW
D76
MURS120T3
N433
D73
30A-400V
D85
30A-400V
P1
N425
R350
15-2W
C139
100-25V
PRI_LO
D80
15A-200V
D75
15A-200V
D81
15A-200V
C147
100pF-500V
N431
N432
N434
4148
^D_SOT-23
D69
S16
S15
S14
S13
S12
S11
S17
S20
S19
S18
T2:2
XF-79
1 2
L10
6UH-BEAD
N438
C152
470-100V
C153
470-100V
C159
470-100V
C160
470-100V
C165
470-100V
C166
470-100V
C169
470-100V
C170
470-100V
C154
470-63V
C161
470-63V
C167
470-63V
C171
470-63V
1 2
L11
6UH-BEAD
1 2
L12
6UH-BEAD
+15V
PRI_LO
C181
470pF-50V-5%
^C_1206
C182
470pF-50V-5%
^C_1206
R360
7.87K
^R_0805
R361
536
^R_0805
2
3
6
4
5
1
COMP
FLIP-FLOP
COMP
THRESHOLD
CONTROL_V
OUTPUT
TRIGGER
RESET
DISCHARGE
U14:1 LM556-SMT
N441
N442
N443
C175
470-63V
P1
-MID-RAIL
-HI-RAIL
C173
470-100V
C174
470-100V
4V NOM
OFF-BUS VOLTAGESRISES
ONLY AFTER V-BIAS > 10V.
ENSURES THAT 556-TRIG
PIN STARTS LOW.
SET NOM PEAK AT 13V, 120VAC
DECLINES ABOUT 30% EVERY 35 MS
REACHES 8.7V IN 40 MS, (2 AC CYCLES)
974K - 24.9K RES DIVIDER
340V NOM BUS = 8.67V
200V MIN BUS = 5.1V UV
R326
487K
^R_1206
NOM BUS VOLTAGE340V (120-240VAC)
MIN BUS VOLTAGE 200-220V (75-150 VAC)
UNDERVOLTAGE SHUTDOWN
TRIGGERS AT 5.1 V-REF
RESETS AT 5.6V (10% HYST)
TIME DELAY
3 SECONDS
5V NOM
.0022-250VAC
C127
0.5-1 MA TO TRIGGER
5V NOM
600V TRACE
100PF @ 15KV ESD
100NF @ 15V BYPASS
+6 V
C124
.001-5%
^C_1206
PARALLEL WINDING ON
RESONANT INDUCTOR
N470
AVERAGE LIMITING HAS
SEVERAL SECOND TIME
CONSTANT TO REACH
2.4V THRESHOLD,
AVE CURRENT 20-25A
FROM DC SHUTDOWN,
SHEET 4
TO SH 4
SH 4
RELAY 25MA
+18V
AC-LO
X-CAPS, 3 PL
CH-GND
STUD
RELAY STARTS OFF LOW. 5V LINE
SETTLES HIGH BEFORE 16V > 8V,
BECAUSE TRIG IS LOW UP TO 10V
AC-HI
120, 240V
LINE FILTER SHIELD
N379
AC-SW
N381
TRANSFORMER
QUIET END
J120
0V - RUN
5V - SHUTDOWN
R352
30K-2W
XF-BIAS
+16V
N393
USE THRU HOLE,
HIGHER WATTAGE
2 BEADS IN PAR HI RAIL
1 BEAD LO RAIL
G
CE
Q96
IRG4PC50U
+18V
R359
^R_1206
10.0
R363
10.0K
^R_0805
C184
1-50V
^C_E_ALUM_B
+VREF
100-25V-105C
C150
SMT-B PKG OK
TO TURN-OFF MUTING
SHEET 4 (FAN SPEED)
SH-002403-00
SH-002403-00
NONE
5OF5
5
C
C
plx2402.sch
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