Bogen PRO12, PRO16, PRO4, PRO8 Service Manual
54-5037-01
Printed in Korea 9903
ProHold
Models PRO4, PRO8,
PRO12, and PRO16
User’s Guide
FCC Notice
Warning: Changes or modifications to this unit not expressly approved by the party
responsible for compliance could void the user’s authority to operate the equipment.
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a residential
environment. This equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Front Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Controls and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Unpacking and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Installation Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Connecting a Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Connecting to the Telephone System . . . . . . . . . . . . . . . . . . . . . .6
Connecting an External Speaker . . . . . . . . . . . . . . . . . . . . . . . . .6
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
External Trigger Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Care and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
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Introduction
The Bogen ProHold Series of Music-On-Hold (MOH) Digital Announcers are designed
to play a digitally recorded announcement over the MOH bus of most telephone systems.
Four models are available. The PRO4 has a recording time of 4 minutes. The PRO8 has a
recording time of 8 minutes. The PRO12 has a recording time of 12 minutes. The PRO16
has a recording time of 16 minutes.
To operate the unit, a cassette tape is placed in the tape compartment. The unit automatically plays (previews) a portion of the audio program over its monitor speaker, and then
pauses so that you can change tapes if desired. If you leave the cassette in the compartment,
the message is downloaded into digital memory. The stored message then plays continuously
(it can also be set for single-play operation). Solid-state operation results in less wear of the
tape and tape drive mechanism, increasing reliability and performance.
Each unit features:
• Automatic downloading, with preview function, from a
standard cassette tape
• Automatic reload after power outage
• High reliability - no tape wear or maintenance problems
• Choice of 600-ohm or 1-watt (8-ohm) output
• Built-in monitor speaker with on/off switch
• Volume control (for monitor speaker and outputs)
• One time play capability (external contact trigger)
• Status (LED) indicators
To change a message, simply insert a new cassette. The new message is previewed and
then automatically downloaded. Once a message has been loaded, the cassette rewinds and
remains in the tape compartment. Then, if the power goes out, or if you turn your system off,
the message is automatically reloaded once power is restored.
The unit provides 600-ohm and 1-watt output jacks for connection to the MOH bus of a
telephone system, external speaker, or public address system. The unit mounts easily on a
wall and comes complete with wall-mounting hardware, an audio patch cord, EXT trigger
cord, and 12V AC power supply which can be plugged into a 120V AC outlet.
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