QSC PowerLight Series, Technical & Service Manual, Page: 28 / 100

26 QSC Audio Products, Inc.
TD-000083-00
IC-000053-30
Timer, dual, LM556; 14-pin SMT
1
2
3
4
5
6
7
14
13
12
11
10
9
8
OUTPUT
RESET
CONTROL VOLTAGE
THRESHOLD
DISCHARGE
TRIGGER
GROUND
Flip-flop
Comp.
Comp.
Flip-flop
Comp.
Comp.
OUTPUT
RESET
CONTROL VOLTAGE
THRESHOLD
DISCHARGE
V
CC
TRIGGER
IC-000054-30
Comparator, quad, LM339AM; 14-pin SMT
1
2
3
4
5
6
7
14
13
12
11
10
9
8
INPUT 1+
INPUT 1-
V+
OUTPUT 1
OUTPUT 2
INPUT 2-
INPUT 2+
INPUT 3-
INPUT 4+
INPUT 4-
GROUND
OUTPUT 4
OUTPUT 3
INPUT 3+
1
2 3
4
IC-000059-00
Top switch, TOP202; TO-220
IC-000235-00
Top switch, TOP224; TO-220
DRAIN SOURCE CONTROL
IC-000055-30
Regulator, power factor, UC3854B; 16-pin SMT
1
2
3
4
5
6
7
8 16
15
14
13
12
11
10
9 GND
PKLMT
CAO
ISENSE
MOUT
IAC
VAO
VRMS
GTDRV
VCC
CT
SS
RSET
VSENSE
ENA
VREF
IC-000056-30
Driver, MOSFET, TC4427; 8-pin SMT
1
2
3
4 8
7
6
5 NC
IN A
GND
IN B
NC
OUT A
V
DD
OUT B
2,4 7,5
IC-000057-30
Counter, ripple, 74HC4024, SMT; 14-pin SMT
1
2
3
4
5
6
7 14
13
12
11
10
9
8 CP
MR
Q6
Q5
Q4
Q3
GND
V
CC
NC
Q0
Q1
NC
Q2
NC
IC-000060-00
Oscillator, clock, 6.000 MHZ; 4-pin DIP
1
7
14
8
OE
GND
V
DD
OUT
IC-000063-30
Op amp, quad, MC33074; 14-pin SMT
1
2
3
4
5
6
7
14
13
12
11
10
9
8
NON-INV. 2
V
CC
NON-INV. 1
INV. 1
OUT 1
INV. 2
OUT 2
INV. 3
NON-INV. 3
V
EE
NON-INV. 4
INV. 4
OUT 4
OUT 3