Bogen TPU-15A User manual

BOGEN
COMMUNICATIONS, INC.
TELEPHONE PAGING AMPLIFIER
TPU-15A
CAUTION
Connect only to POX system incot punning isulutiun
from telecom network.
ATTENTION
Raccorder settlement u un systeme PBX indeperuiam
du reseau de telecommunication.
DESCRIPTION
Bogen Model TPU-15A is a unique fifteen-watt, wall-mounted
amplifier, specifically designed for telephone paging applications.
This compact unit incorporates state-of-the-art electronic technology,
including voice-activated muting of music when paging. The page
channel features automatic output leveling (ALC) as channel input
varies, which is particularly advantageous where persons of varying
voice levels and paging techniques have access to the system. A night
ringer (tone generator) is provided; a steady ringing tone, indicating
incoming calls, can be transmitted through the public address system
during other than regular business hours. This alerts security per¬
sonnel to answer the call.
Input terminals are furnished for a 600-ohm balanced telephone
line, a background music source and normally-open dry contacts for
the night ringer. Output terminals offer a choice of 25 volts, 70 volts,
or 8 ohms for connection of various types of loudspeakers.
Model TPU-15A features screwdriver-adjustable controls for page,
music, and night ringer level, plus amplifier tone. Protective devices
include an LED overload indicator and a low-cut switch for use with
horn loudspeakers. The unit is professional in styling and is finished
in black with white lettering. It operates from a 120VAC, 60Hz source.
INSTALLATION
CAUTION
The fallowing installation instructions are far use hy
qualified service personnel only. To avoid an electric
shock hazard, do not perform any functions requiring
the removal of the cover of the amplifier unless you are
qualified to do so. To prevent fire nr shock hazard, da
not expose this unit to rain or excessive moisture.
UNPACKING
Your unit was carefully checked before leaving the factory; inspect
the shipping container and unit closely for improper handling. 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 shipping ma'terial, notify the carrier immediately and place
your claim.
POWER AND GROUNDING
The AC line cord has a three-prong plug which should be plugged
into a three-wire, grounded 120V, 60Hz outlet. It is important to
ground the unit. If a three-wire outlet is not available, use an adap¬
tor and connect the grounding pigtail to the screw securing the wall
plate. If the wall plate screw is not grounded, connect a wire from
the ground terminal of the amplifier to a suitable earth ground.
MOUNTING
Model TPU-15A is designed for surface wall mounting. When
mounting the unit, consider the proximity to heat sources and power
supply, adequate air flow for chassis heat dissipation, and access to
controls and terminal wiring, Where possible, secure to wall studs
or a suitable back brace. Use self-fastening or molly-type hardware
on plasterboard and other thin materials.
INPUT CONNECTIONS
PAGING
A balanced transformer-isolated input for a telephone line is pro¬
vided. One 600-ohm telephone line may be connected at the terminals
marked TIP and RING If tuo-conductor shielded wire is used, con¬
nect the shield to the GND terminal.
MUSIC
An unbalanced high-impedance auxiliary input is provided. Make
connections to terminals marked MUSIC and GND.
NIGHT RINGER
A ringing tone can be transmitted through the public address system
by connecting the NIGHT RINGER and GND terminals on the
TPU 15A amplifier through a pair of normally open dry contacts
(which are customer-supplied). A steady ringing tone will be heard
as long as the dry contacts are closed.
Printed in Korea 8801 54-5876-02

Pated Power Output:
Distortion*
Frequency Response:
Sensitivity*
Inputs:
Outputs:
Signal to Noise
(“A” weighted):
Controls and Indicators:
Tone Control:
Low Cut:
ALC (Page Channel):
Power Consumption
(120VAC, 60Hz):
TECHNICAL SPECIFICATIONS
15 watts RMS
Loss than 2%
Music—lOWz to 12kHz ±2dB
Paging —shaped for maximum intelligibility
Music —70mV
Paging -20dBm, 600 ohms
Music— Hi-Z AUX, 25k ohms, unbalanced
Paging —600 ohms balanced, transformer-isolated
Night Ringer— steady tone while dry contacts* are closed
15 watts @ 8 ohms; 25V and 70V balanced, transformer-coupled
-70dB
Screwdriver-adjustable—PAGE VOLume, MUSIC VOLume, NIGHT RINGER VOLume, and TONE;
LO-CUT switch (for horn protection); PEAK LEVEL-indicating LED (ON when peak output exceeds
rated output), CIRCUIT BREAKER
-3dB @ 2.5kHz; 6dB per octave
-3dB @ 350Hz; 6dB per octave
+1, —3dB output level change with 15dB input level change (ref. —20dBm rated input sensitivity)
.4A, 48W
•Customer-supplied
All specifications subject to change without notice.
OUTPUT CONNECTIONS
SPEAKERS
The unit provides 8-ohm, 25V and 70V transformer-coupled out¬
puts, balanced or unbalanced. Connect the system speaker to the out¬
put terminals, with one lead to the COM terminal and the other to the
iciinitial which corresponds to the impedance or tne speaker system.
OPERATION
POWER
Once connection has been made to a 120VAC, 60Hz power source,
the TPU-13A will remain m a power standpy condition. (See CIRCUIT
BREAKER information, also.)
CONTROLS
PAGING
The PAGE VOLume screwdriver-adjustable control is used to adjust
the volume ot the page input. Rotate the control clockwise to increase
volume and counterclockwise to decrease it. Set the control to
minimum if the input is not used.
MUSIC
The MUSIC VOLume screwdriver-adjustable control is used to ad¬
just the volume of the background music input. Rotate the cunliul
clockwise to increase volume and counterclockwise to decrease it.
If the input is not used, set the control to minimum.
NIGHT RINGER CONTROL
The NIGHT RINGER VOLume is screwdriver-adjustable through
the top of the unit. Rotate. th<» rnntml I'lnrliuicp to increase volume
and counterclockwise to decrease it.
TONE CONTROL
The TONE screwdriver-adjustable control is used to adjust the tonal
value of the amplifier output. Rotate the control fully clockwise to
provide a nominal, flat high-frequency response and counterclock¬
wise to decrease it.
2

H
5
Z
3
Figure
1—Schematic
Diagram,
Model
TPU-15A

LO-CUT SWITCH
The LO-CUT filter is used to decrease low-frequency response
when hom-type paging speakers are used. Move the switch to the nght
(toward the marking) to enable this feature.
PEAK LEVEL INDICATOR
A front-panel LED will illuminate when the amplifier is driven into
clipping. Adjust the output level of the PAGE, MUSIC, and/or NIGHT
RINGER if the LED remains ON.
CIRCUIT BREAKER
If the circuit breaker opens, the amplifier output will cease. Discon¬
nect the plug from the outlet and momentarily depress the red circuit
breaker reset button. Reapply power; if the breaker trips again, do
lot attempt to reset it. Have the unit checked by a qualified technician.
MAINTENANCE
CAUTION
There are no user-replaceable parts within the unit. To
avoid an electric shock hazard, have all internal ser¬
vicing done by a qualified technician. The warranty will
become void if repairs are made by other than the Bogen
Service Department or an authorized service agency.
BOGEN SERVICE
We are interested in the maintenance of your Bogen equipment.
In the event of any difficulty, do not hesitate to ask our advice or
assistance. Information may be obtained by writing to Service Depart¬
ment, Bogen Communications, Inc., P.O. Box 575, Ramsey, NJ 07446.
When communicating with us, give the model and series designa¬
tion of your unit, describe the difficulty and include details of the
electrical connections to associated equipment. We will send you
information if the remedy appears simple. If service is required, we
will send you the name and address of the nearest authorized Bogen
Service Agency.
When shipping your unit, pack it well, using the original shipping
carton or a similar container and filler material to prevent damage
in transit. Send the unit, fully insured and prepaid, via UPS or any
responsible carrier. It will be promptly repaired and returned to you
collect Cor prepaid while in warranty).
REPLACING COMPONENTS
CAUTION
Improper soldering may damage components or
the printed circuit hnnrd Such dnmnge c/m void the
warranty.
Many semiconductor components are soldered in place to ensure
maximum reliability. When soldering transistors or diodes, use a heat
sink (such as a small alligator clip) between the component and the
source of heat. Unless you are experienced in the removal of IC com¬
ponents, do not attempt to remove them, since excessive heat can
damage an IC and/or the printed circuit board. If you are certain that
an IC is defective, the easiest method of removal is to cut the leads
off close to the component and desolder the leads individually. If you
are not certain an IC is defective, the use of a low-wattage, vacuum-
type desoldering tool (such as Ungar Type 7800) is advised.
REPLACEMENT PARTS
Most components are standard parts available through reputable
parts suppliers. The parts listed herein may be obtained from the fac¬
tory. When ordering a part, specify the part number as listed, the
model number of the unit, and give the series designation, which is
a letter followed by numbers, printed on the chassis. For parts on the
circuit boards, also give the component board assembly number,
which begins with “45.”
Schem.
Ref. fort No.
Description
Component Boards
-
45-7288-05
Component Board Assembly
(Main Board)
C2,4,9,11,
17,23 79-126-055 Cap., Elect., 4.7/tF, 50V
CIO
79-126-057
Cap., Elect., 47,tF, 50V
C14
79-126-053 Cap., Elect., 100/tF, 35V
C18
79-119-015 Cap.. Elect.. 3300 mF. 63V
C19 79-126-044
Cap., Elect., IOOO/aF, 35V
CR1
96-5691-01 Diode, Zener, 4.7V, IN5230A
CR2,4,5
96-5430-01 Diode, IN4148
CR3
96-5344-08 Diode. Zener. 30V
CR6-9
96-5333-01 Diode, 400prv @ 1A
CR10.11
96-5684-02 Diode, Zener, 2.2V, IN4680A
CR12
96-5692-01
Suppressor, Transient, SCM16C
IC1
96-5690-01 IC, LM833N
IC2
96-5649-01 IC, LM1875T
LED1
96-5576-01 LED, Red
Ql-3
96-5641-01
Transistor, MPS4123
R1.13 77-001-843 Control. 500 kilohrm. Audio
R3
77-001-817
Control, 10 kilohms, Audio
R9
77-007-002
Trimpot, 4700 ohms
R21
76-146-109 Resistor, 1 ohm, 1/4 watt, 5%
SWI
81-003-067 Switch, Slide
T1
83-060-000
Transformer, Input
—
45-7351-05
Component Board Assembly
(Night Ringer)
C4
79-126-069
Cap., Elect., IpF, 50V
IC1
96-5667-01
IC, f*A78L10
IC2
96-5729-01
IC, KA2418
R4
77-015-001 Trimpot, 100 ohme
Chassis
CB101
94-0025-03 Circuit Breaker, 0.63A
T101
83-837-000
Transformer, Power
T102
83-496-000
Transformer, Output
BOGEN
50 SPRING STREET. P 0. Bo* 575
RAMSEY. NJ 07446 [phone]