Chapter 9 - Module Descriptions; Section 9-1 - Introduction; Section 9-2 - Audio Booster Audio Booster Pc Board; Figure 9-1A Spb-80/4 Pc Board - Wheelock SAFEPATH4 Application, Installation, Operation, And Maintenance Manual

Chapter 9 - Module Descriptions

Section 9-1 - Introduction

There are two items on the parts list for the panel. They are:
•
SPB-80/4MB (PC Board)
•
SPB-160MB (PC Board)
•
SAPS (24VDC Power Supply Module)
Section 9-2 - Audio Booster PC Board
The Audio Booster PC Board provides all signal handling capabilities, amplification and
supervision.
Rated audio output at 1kHz:
UL Frequency response:
Rated STB Output:
The PC Boards are illustrated in Figure 9-1A (SPB-80/4) and 9-1B (SPB-160).
W7
TB2
AUD IN
AUD RET
J2
1
25
70
AUX IN
AUX RET
SW1
SW4
STB IN
STB RET
W8
W5
TB3
SPB-160
2 – 80 Watt circuits
800Hz to 2.8kHz
None
LVL
D33
R23
AUX
TRB
D28
TROUBLE
D24
W1
D22
AMP TRB
Figure 9-1A
SPB-80/4 PC Board
1 – 80 Watt circuit
800Hz to 2.8kHz
2 – 24VDC 2A circuits
TRANSFORMER
J1B
F1
25
70
AC TRB
D27
D26
BAT TRB
AUD1
SHORT
D32
STRB2
D37
SHORT
AUD1 OPEN
STRB2 OPEN
D31
D38
STRB1
STRB1 SHORT
OPEN
D36
EXP SHORT
D77
EXP OPEN
D76
W10
GF
D34
W4
SPB-80/4
F2
TB1
TB4
D59
AC
J3
25
D60
70
POWER
TB5
STRB2
D62
OUT
STRB1 OUT
D61
TB6
D35
EXP OUT
W6
D75
N
AC
L
DC IN
DC OUT
BATTERY
AUD1 OUT
STB2 OUT
STB1 OUT
EXP OUT
SPARE
C
T
NO
R
B
NC
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