Federal Signal A12W Serie Manual De Instalación Y Mantenimiento página 8

+
R2
C1
270
1.0
+
C7 2N2925
0.05 Q1
+
R3
47K
R1
5K
R15
+
Q3
E C B
HSI
+
R12
C6
Q4
R14
E
+
C R13
C5
B
R9
R11
T1
+
C2
R6 R8
R10
R5
R16
+
C8
R2
R3
290A2054B
Figure 4. Electronic Megaphone Amplifier Parts Location.
+
C8 R16 C9
22 150 150
R4 R7
4700 18K
+
C3
TIS92
10
Q2
R6
C2
470
10
R8 R10
3300 10
R5
10
Figure 3. Electronic Megaphone Schematic Diagram.
C4
T2
+
C3
6 5 4 3 2
Q1 Q2
P1
E B C E
C
B
R7
R4
C7
+
R1
C9
+
C1
+
R9 R12 C4
390
100 1.0
T1
R15
0.1
Q3
2W
2N5296
2N5296
Q4
R11
12
R13 C5
100 1.0
+
AMPLIFIER ASSEMBLY PC BOARD
Schematic
Symbol
R1 Potentiometer, 5K ohm
R2 Resistor, 270K ohm, 5%, 1/4 W, carbon
R3 Resistor, 47K ohm, 5%, 1/4 W, carbon
R4 Resistor, 4700 ohm, 5%, 1/4 W, carbon
R5 Resistor, 10 ohm, 5%, 1/4 W, carbon
R6 Resistor, 470 ohm, 5%, 1/4 W, carbon
R7 Resistor, 18K ohm, 5%, 1/4 W, carbon
R8 Resistor, 3300 ohm, 5%, 1/4 W, carbon
1
R9 Resistor, 390 ohm, 5%, 1/4 W, carbon
R10 Resistor, 10 ohm, 5%, 1/4 W, carbon
R11 Resistor, 12 ohm, 5%, 1/4 W, carbon
R12,13 Resistor, 100 ohm, 5%, 1/4 W, carbon
R14 Resistor, 68K ohm, 5%, 1/4 W, carbon
R15 Resistor, 0.1 ohm, 5%, 2 W, WW
R16 Resistor, 150 ohm, 5%, 1/4 W, carbon
C1,4,5 Capacitor, 1.0UF, 50V, tantalum
C2,3 Capacitor, 10UF, 35V, tantalum
C6 Capacitor, 0.47UF, 35V, tantalum
C7 Capacitor, 0.05UF, 25V, disc
C8 Capacitor, 22UF, 15V, tantalum
C9 Capacitor, 150UF, 16V, electrolytic
Q1 Transistor, 2N2925
Q2 Transistor, TIS92
Q3,4 Transistor, 2N5296
T1 Transformer, Driver
T2 Transformer, Output
HS1 Heat Sink
P1 Connector, Header, 6-pos.
PCB1 PC Board (with parts)
Copyright 2013 Federal Signal Corporation
6
NOTE: UNLESS OTHERWISE
SPECIFIED: – ALL
RESISTORS ARE IN
OHMS 5%, 1/4 W,
– ALL CAPACITOR
VALUES ARE IN
MICROFARADS(UF).
T2
6 SPEAKER
5
SPEAKER
4 12 VDC
3
GROUND
C6
2
0.47 GROUND
R14
1 MIC. INPUT
68K
5%
290A2053C
PARTS LIST
Description Part No.
105A204-01
100A227
100A228
100A298
100A251
100A248
100A258
100A242
100A283
100A251
100A285
100A240
100A261
103A114
100A238
107A649
107A1117A
107A645
107A227
107A677A-02
108A147
125A119
125B132
125B415
120B133
120B138
236A110
140A235A-02
200C507