Toa PA-3640VB - Manual (Page 4)

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2. GENERAL DESCRIPTION
The PA-3640VB is a rack-mount Power Amplifier having Priority input/output and Program input/output.
Shorting the Priority control terminal allows the Priority input to take precedence over the Program input and
the rear-mounted Priority control output to be activated. In this case, the front-mounted Priority indicator lights
red to indicate the priority circuit is activated. The input and output for each of Priority and Program are
internally connected in parallel, permitting multiple power amplifiers to be bridge-connected to have the same
input sources.
The unit can operate on either 220 V AC or 24 V DC. The rear panel includes provision for mounting an
optional YA-1000A Fault Detection Circuit Module that functions to detect power amplifier failures.
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3. NOMENCLATURE AND FUNCTIONS
[Front]
1. Power indicator (Green)
Lights when the power is applied to the unit.
2. Program volume control
Adjusts the program input volume.
Turn the control clockwise to increase the
volume and counterclockwise to decrease it.
3. Priority volume control
Adjusts the priority input volume.
Turn the control clockwise to increase the
volume and counterclockwise to decrease it.
4. Priority indicator (Red)
Lights when the Priority control input terminal
(12) is shorted.
5. AC fuse holder
Fuse capacity: 5 A
6. DC fuse holder
Fuse capacity: 30 A
7. Handle