GE Security EST3 Installation And Service Manual page 151

Figure 4-11: Power supply terminal card, with 3-ATPINT, cover removed
Figure 4-12: Dukane amplifier, rear view
EST3 Installation and Service Manual
The output of the amplifier must be set for the proper value by
adjusting the INPUT LEVEL adjustment on the back of the
amplifier. With a 1,000 Hz tone generated by the 3-ACPor 3-
ZA20, the amplifier must be adjusted for 70 Vrms output using
the appropriate RMS voltmeter.
FUSE 25A
70.7 V
25 V
25 V
CT
8 OHM
OUTPUT
COM
FUSE 6.25A SB
24 VDC
120VAC
60HZ
Centralized audio applications
LEVEL ADJUST
BRIDGING
INPUT
COM
EARTH
N/C
4.19