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SI-125 Power Amplifier Manual 

 

LIMITED WARRANTY POLICY 

Telecor Inc. warrants all products bearing the Telecor name to be free from defects in material and 
workmanship under normal use and service for a period of one year from date of delivery. Telecor will 
repair or replace (at our option), free of charge, any unit that is found to be defective and returned to us 
under warranty. Telecor warrants all other products made by others, and distributed by us, to be covered 
by the manufacturers' warranty period. 
 
This warranty shall not apply to any Telecor products that have been subject to misuse, neglect, accident, 
modification, water, fire, lightning, paint, or used in violation of instructions furnished, repaired or altered 
outside of the factory. This warranty does not cover batteries, bulbs, fuses or damage caused by batteries 
used in connection with the product. Telecor reserves the right to make the final decision on whether 
there is a defect in materials or workmanship, and whether or not the product returned is within the 
warranty period. 
 
This warranty covers bench repairs only. Telecor will not be responsible for any costs incurred involving 
on-site service calls. Repair or replacement by others, fire, transportation, labor charges, indemnity, etc., 
are not covered by this warranty and no responsibility for same will be assumed by us. Our liability does 
not extend to consequential damage. 
 

AUTHORIZED REPAIR STATION: 

All participating Distributors and Dealers are authorized to accept Telecor products for return to us for 
repair or replacement, or customers may return goods to us directly, providing that return authorization 
has been obtained. 
 

U. S. customers are required to ship any returns or repairs to: 

 Telecor 

Inc. 

 

2434 Jerauld Avenue 

* U. S. customers must not 

 

Niagara Falls, New York 

return products to Canada

 

 USA, 

14305 

 

Canadian and all International customers are required to ship any returns or repairs to: 

 Telecor 

Inc. 

 6205 

Kestrel 

Road 

 Mississauga, 

Ontario 

 Canada, 

L5T 

2A1 

 
For details on Telecor’s Return Policy, see our Published Merchandise Return Policy. 
 
E:\T2-108\T2-M108-ABC\T2-M108-B.doc/AD 
 
© Copyright 2016 by Telecor Incorporated. All rights reserved. No part of this publication may be 
reproduced in any form, or by any means, without the prior written permission of Telecor Incorporated. 
 
Telecor Inc. makes no representation of warranties with respect to this manual. Furthermore, Telecor 
reserves the right to make changes in the specifications of the products described in this manual at any 
time without notice, and without obligation of Telecor to notify any persons of such revisions or changes. 
 
www.telecor.com

 

 

Summary of Contents for SI-125

Page 1: ... from overloading The amplifier also has circuitry to protect it from overheating The SI 125 Power Amplifier can have optional modules installed for additional functionality The PA AM Power Amplifier Attenuator Module allows the amplifier to support a 25 V input signal The PA MM Power Amplifier Monitor Module activates a relay under normal amplifier operation The PA PM Power Amplifier Paging Modul...

Page 2: ...ee the Troubleshooting section C CURRENT OVERLOAD Light If the current output of the amplifier exceeds its maximum power output the Current Overload light will illuminate and the output level will begin to be reduced The amplifier will continue to operate with the current limiting circuit reducing the output power If the Current Overload light illuminates see the Troubleshooting section D GAIN Con...

Page 3: ...overs the slot Please note that the accessory modules are not user installable They must be factory installed and ordered with the amplifier Do not remove any modules or the cover plate J INPUT LEVEL Switch The Input Level switch selects the range of the input level This switch works in conjunction with the GAIN Control on the front of the amplifier The Input Level switch should be set to match th...

Page 4: ...urn on either when there is excessive signal level on the input or when there is hard clipping present on the output The CLIP light will not turn on when the output level is clipped due to current overload Installation Before installing an SI 125 Power Amplifier carefully inspect the device for any damage that may have occurred during shipping The shipping package should contain only the Power Amp...

Page 5: ...own in Figure 5 Figure 5 Input Connections To reduce the incidence of ground loop hum oscillation or interference from other audio sources 1 Use a shielded cable for input wiring The shield must be grounded at one end of the cable only not both 2 Regardless of what type of input signal is supplied to the amplifier balanced or single ended the GND terminal should not be connected to the common term...

Page 6: ...pplications there is often a privacy switch in the room When this switch is activated it grounds one side of the room speaker line through a transformer Make sure that all these privacy switches are not in the Privacy position when measuring line impedance to ground These switches do not adversely affect the operation of the amplifier When measuring load impedance on a Telecor installation disconn...

Page 7: ...registers a signal when no signal should be present The amplifier may be oscillating possibly at a very high frequency This may be caused by running input and output wires close together grounding the input or incorrect grounding of the shield The Current Overload light illuminates or flashes This indicates that the amplifier is being overloaded Check the total speaker load on the amplifier Also c...

Page 8: ...ls on input and output Mas Con connectors are used with optional modules Controls Power Switch Illuminated GAIN Control Low Cut Switch Input Level Switch 1 V 100 mV Indicators Clip High Temperature VU Meter and Current Overload Protection Foldback current limiting Over temperature protection Primary circuit fused at 3 5 A Temperature Range 10 C to 35 C 14 F to 95 F Power Consumption AC 120 V 60 Hz...

Page 9: ...ansportation labor charges indemnity etc are not covered by this warranty and no responsibility for same will be assumed by us Our liability does not extend to consequential damage AUTHORIZED REPAIR STATION All participating Distributors and Dealers are authorized to accept Telecor products for return to us for repair or replacement or customers may return goods to us directly providing that retur...

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