Bogen Amplified Phone TPU 100B User Manual

Telephone Paging Amplifiers  
MODELS TPU-35B, TPU-60B, TPU-100B  
INSTALLATION & OPERATING INSTRUCTIONS  
 
Description  
Unpacking  
Congratulations on your purchase of a BOGEN TPU-B Series  
Telephone Paging Amplifier. The TPU-B Series represents the  
continuing evolution of the popularTPU-SeriesTelephone Paging  
Amplifiers. The amplifiers supply the full range of features  
already found in the TPU Series, and incorporate exciting new  
features that further define the state-of-the-art of telephone  
paging.  
The amplifier was carefully checked before leaving the factory;  
inspect the shipping container and unit closely for improper han-  
dling. If the unit has been damaged, make an immediate claim to  
the distributor from whom it was purchased. If the unit was  
shipped directly to you, save all packaging material, notify the  
carrier immediately and place a claim.  
The feature set of the TPU-B Series amplifiers includes:  
WARNING  
• Three Models/Power Levels Available: TPU-35B/35 Watts,  
TPU-60B/60 Watts, and TPU-100B/100 Watts.  
• Inputs for 600-ohm balanced telephone line, LO-Z balanced  
microphone, and background music source.  
• Choice of outputs: 16-ohm, 25VCT, 25V, or 70V outputs,  
balanced or unbalanced.  
The following installation instructions are for use by  
qualified service personnel only. To avoid an electric  
shock hazard, do not perform any functions requiring  
removal of the cover of the amplifier unless you are  
qualified to do so. To prevent fire or shock hazard, do  
not expose this unit to rain or moisture.  
• Choice of RCA jack or screw terminals for Music source  
(unbalanced).  
Volume controls for Tel channel, MIC, Music and Ringer.  
• Ringer circuit activated by contact closure or 90V ring  
signal.  
Power and Grounding  
• Variable music mute with adjustable Mute level control.  
• Signal-activated paging channel withVOX sensitivity and ALC  
adjustments.  
• Aphex® Aural Exciter Circuit with on/off switch and effect  
adjustment.  
The AC line cord has a three-prong plug which must be plugged  
into a three-wire grounded outlet. It is important to ground the  
amplifier. If necessary, have an electrician ensure that the outlet  
is grounded. The POWER LED illuminates when power is  
applied to the unit.  
• Bridging jacks supplied to double number of inputs and  
outputs.  
• Output (RCA jack) to line-matching tranformer (WMT-1A).  
Installation  
The frequency response on the paging or microphone channels  
is +/-1dB from 70Hz to 15KHz. Distortion is less than 1% from  
80Hz to 15KHz. Hum and noise, from 20Hz to 20KHz is -70dB  
or better on the music and page channels and -55dB or better  
on the microphone channel. Bass response is adjustable +/-9dB  
at 100Hz. Treble response is adjustable +/-9dB at 10KHz (both  
+/-2dB).  
The TPU-Series is designed for surface wall mounting. When  
mounting the unit, avoid proximity to heat sources. Allow space  
for terminal wiring, access to controls, and adequate air flow for  
heat dissipation. Amplifiers are heavy; where possible, secure  
the unit to wall studs or a suitable back brace. Use self-fasten-  
ing or molly-type hardware on hollow sheet rock type walls.  
The amplifier operates from a 120V AC source and is protected  
by a circuit breaker, electronic overload protection and by reset-  
table thermostat.  
Four #6 x 3/4” screws are provided with the unit to mount to  
solid wall stock. Hold the amplifier to the wall and trace the  
inside edge of the top keyhole mounting holes. Set the amplifier  
down and locate the top two screws in position (13-1/2” apart).  
Secure them to the wall, allowing the screw heads to protrude  
1/8” to 1/4”. Fit the chassis over the screw heads and position  
the bottom two screws. Complete the mounting of the amplifi-  
er by tightening all screws securely.  
CAUTION  
Connect only to PBX system incorporating isolation from  
telecom network.  
ATTENTION  
Raccorder seulement a un systeme PBX independant du  
reseau de telecommunication.  
2
 
RINGERTONE  
Input Connections  
As shipped, a steady ringing tone will be heard as long as the dry  
contacts remain closed. To produce a pulse tone, it is necessary  
to remove the cover and place the jumper located at J1 in the  
P (Off) position.  
The TPU-B Input connections and Aphex On/Off switch are  
housed in the Input Connections Bay, accessible by removing the  
left cover panel on the front of the amplifier. Loosen the hold  
down screws on the panel and slide the panel up to remove. A  
knockout is provided on the panel to admit wiring. Be sure to  
replace the cover and secure the hold down screws after mak-  
ing connections.  
WARNING  
This procedure requires removal of the amplifier cover.  
To avoid an electric shock hazard, do not perform this  
procedure unless you are qualified to do so.  
APHEX®  
The Aphex® Aural Exciter circuit is controlled by the on/off  
switch located in the input connections bay. When the switch is  
in the on position, the harmonics that are usually lost in the  
amplification process are regenerated and added to the audio  
signal. This results in increased presence and clarity, increased  
intelligibility, greater perceived loudness (without adding extra  
power) and reduced listener fatigue.  
Figure 1.TPU Input Connections Bay  
TEL  
BRIDGING JACKS  
A balanced isolating transformer input for a telephone line is  
provided. A 600-ohm telephone line may be connected to the  
TEL terminals. If two-conductor shielded wire is used, connect  
the shield to the adjacent GND (ground) terminal, which is to  
the left of the TEL terminals.  
TwoTPU amplifiers may be bridged together to double the num-  
ber of inputs and outputs. Connect a single-conductor shielded  
cable, terminated in an RCA phono plug at each end, between  
the BRIDGING jacks of the two amplifiers. The cable should not  
be more than 20 feet in length.  
MIC BAL & MUSIC MUTE  
A low-impedance balanced microphone can be connected to the  
screw terminals marked MIC BAL. Use two-conductor shielded  
wire and connect the shield to the adjacent GND terminal.  
Connect the MUSIC MUTE terminals to the switch on the  
microphone for microphone muting of the music channel.  
Output Connections  
Output connections are housed in the connections bay, accessi-  
ble by removing the right hand cover panel on the front of the  
amplifier. Loosen the hold down screws on the panel and slide  
the panel up to remove. Knockouts are provided on the panel  
to admit wiring. Be sure to replace the cover and secure the  
hold down screws after making connections.  
MUSIC IN  
A wide range of HI-Z background music sources can be con-  
nected to the TPU amplifier. Connect the source to either the  
MUSIC RCA jack or MUSIC IN screw terminals.  
TEL RING & CONTACT RING  
The night ringer can be activated either by a 90V ring signal or  
from a dry contact closure.  
To activate the night ringer using the ring signal, connect the sig-  
nal to the TEL RING terminals.  
To activate the night ringer using contact closure, connect a pair  
of normally-open dry contacts (customer-supplied and installed  
in the telephone system) to the CONTACT RING terminal and  
adjacent GND terminal.  
Figure 2.TPU Output Connections Bay  
3
 
Speakers  
Controls  
Speaker systems can be connected directly to the speaker out-  
put terminals. The amplifier provides outputs at 16-ohm, 25VCT,  
25V, and 70V, and is shipped for use with unbalanced systems.  
Connect one lead to the terminal corresponding to the imped-  
ance of the speaker system and the other to the COM and GND  
terminals on the output terminal strip.  
APHEX®  
The APHEX® control on the front panel adjusts the mix of the  
Aphex effect with the audio signal. Clockwise rotation of the  
control maximizes the effect. Counterclockwise rotation mini-  
mizes the effect.  
For balanced systems, remove the link between COM and GND.  
To turn the Aphex circuit on or off, use the slide switch located  
in the connections bay (See INPUT CONNECTIONS).  
Additional Power Amplifier  
An external power amplifier can be used with theTPU amplifier.  
You must modify the output circuitry of the telephone amplifier  
by adding a resistor network, as illustrated below. Connect a  
patch cord to the high-level/high-impedance input of the boost-  
er amplifier.  
Treble & Bass  
The BASS control provides +/-9dB of boost and cut at 100Hz.  
TheTREBLE control provides +/-9dB of boost and cut at 10KHz.  
Rotate controls clockwise to boost and counterclockwise to  
cut.  
TEL INPUT  
VOX (Voice-Operated) SENS  
TheVOX SENSitivity control should be set so that only the  
desired signal is above the threshold level, while noise or  
unwanted signal is below it. When an input signal (such as  
voice) is detected, the music channel will be muted. To  
adjust the sensitivity of this circuit:  
WMT-1A  
1. Rotate the control fully clockwise. While making a page  
announcement and talking at a low level, the sound should  
not be choppy nor missing parts of words. If it is choppy, or  
if intelligibility is poor, rotate the control counterclockwise  
to the point where the sound is clear and crisp (but not to  
the maximum counterclockwise position).  
Connect a Bogen WMT-1A accessory to the RCA jack labeled  
WMT-1A in order to feed a 600-ohm telephone line, LO-Z input  
or balanced Mic input of another amplifier. Refer to the instruc-  
tions furnished with theWMT-1A accessory for full information.  
2. If the background music shuts down when no page  
is in progress, rotate the control clockwise until the  
music is restored.  
Operation  
Power  
VARIABLE MUSIC MUTE  
Plug the amplifier line cord into a suitable outlet. The POWER  
LED will illuminate once power is applied to the amplifier. The  
unit remains in a power standby condition after power is applied.  
The MUSIC MUTE control adjusts the mute level of the  
background music when using the telephone paging channel.  
This control differs from the MUSIC MUTE terminals which  
mute background music during a microphone page (See  
Input Connections). The fully counterclockwise position  
results in maximum muting. The fully clockwise position  
results in minimum muting.  
PEAK LEVEL  
The PEAK LEVEL LED will illuminate if the amplifier is driven  
into clipping. Adjust the output level of MIC VOLUME, PAGE  
VOLUME, MUSIC VOLUME, or RINGER VOLUME if the PEAK  
LEVEL LED remains ON.  
RINGERVOLUME  
Adjust to the desired level - clockwise to increase, counter-  
clockwise to decrease the level.  
4
 
MUSICVOLUME  
Maintenance  
The MUSICVOLUME control adjusts the volume of background  
music. Rotate the control counterclockwise to decrease the  
level. Rotate the control clockwise to increase the level.  
CAUTION  
There are no user-serviceable parts within the amplifier.  
Have all internal servicing performed by a qualified techni-  
cian. The warranty may become void if repairs are per-  
formed by anyone other than the Bogen Factory Service  
Department.  
MICVOLUME  
The MICVOLUME control adjusts the microphone level. Rotate  
the control counterclockwise to decrease the level. Rotate the  
control clockwise to increase the level.  
Circuit Breaker  
TELVOLUME  
If the circuit breaker trips, the POWER LED will go out and  
there will be no output. Unplug the AC line cord. Remove the  
cover of the output connections bay and press the red Circuit  
Breaker button to reset it. Replace the cover and plug the line  
cord back into the outlet. If the breaker trips again, have the  
trouble investigated by qualified personnel.  
This control adjusts the telephone paging level. It does not affect  
the microphone level. Rotate the control counterclockwise to  
decrease the level. Rotate the control clockwise to increase the  
level.  
ALC  
Thermal Protection  
The telephone paging channel has an ALC circuit that maintains  
constant output level regardless of input variations in the vary-  
ing voice levels of persons using the system. The ALC is factory  
set and adjustments are not normally required. If ALC is  
required, set the ALC control using the directions below.  
If the thermal protection activates, there will be no audio out-  
put but the POWER LED will remain on. Wait approximately five  
minutes for the amplifier to cool. If the amplifier overheats again,  
investigate the cause of the over-temperature condition. This  
may be due to improper connections at the output terminals or  
excessive environmental heat due to inadequate ventilation.  
1. Turn off the ALC by rotating the control fully counterclock-  
wise.  
2. Set the TELVOLUME control to the highest level likely to  
be required. Hold a telephone handset in a normal position  
and speak softly yet distinctly into the mouthpiece. Adjust the  
TEL VOLUME control to the desired output level.  
Bogen Service  
The TPU amplifier is covered by a 2-year warranty. If you  
encounter difficulty with your TPU amplifier, please do not hesi-  
tate to ask our advice or assistance. Information can be  
obtained by calling our Application Engineering Department or  
Factory Service Department at (201) 934-8500.  
3. Speak in a loud voice directly into the handset mouthpiece  
while rotating the ALC control clockwise to the point where  
the output of the amplifier is reduced to the same level as that  
obtained in Step 2.  
If you are shipping the unit for a warranty repair, pack it in the  
original shipping container or similar container and send the unit,  
fully insured and prepaid, via any responsible carrier. Include a  
letter stating the problem and proof of purchase showing the  
purchase date. The amplifier will be promptly repaired and  
returned to you freight prepaid while in warranty.  
To vary the overall volume without disturbing the ALC adjust-  
ment, use the TEL VOLUME control.  
5
 
 
50 Spring Street, Ramsey, NJ 07446 (201) 934-8500  
54-9213-01 0809  
 

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