Studio Technologies IFB Plus 2001 - Manual (Page 44)

Issue 7, November 2001 Model 2 User Guide
Page 44 Studio Technologies, Inc.
mains power and the telephone lines.
Replace a blown fuse only with the correct
type: 0.5A, 250V, 2AG, slow blow.
Model 22, Model 32, &
Model 33
The Model 22 Access Station, the Model
32 Talent Amplifier, and the Model 33
Talent Amplifier all have fairly simple
circuitry. A careful review of the block
diagrams, located at the end of this guide,
and schematic diagrams, located in the
separate schematic packet, should allow
rapid problem solving. All share the condi-
tion that all signals, including power,
audio, and logic, begin and/or end with
the Model 2 Central Controller.
The first thing to determine is that the
wiring linking the units together is correct.
Ensure that the Model 22 is getting
+18Vdc for operation. The Model 32 and
Model 33 use +18Vdc modulated with
channel 1 audio. Use an oscilloscope to
check for both the DC voltage, and the
superimposed audio signal.