GAI-Tronics 751-002 User Manual

Pub. 42004-258B

GAI-TRONICS® CORPORATION

A HUBBELL COMPANY

Model 751-002 24 V DC

Speaker Amplifier

Confidentiality Notice

This manual is provided solely as an operation, installation, and maintenance guide and contains
sensitive business and technical information that is confidential and proprietary to GAI-Tronics.
GAI-Tronics retains all intellectual property and other rights in or to the information contained herein,
and such information may only be used in connection with the operation of your GAI-Tronics product or
system. This manual may not be disclosed in any form, in whole or in part, directly or indirectly, to any
third party.

General Information

The Model 751-002 24 V dc Speaker Amplifier
is an important component of the 700 Series
Page/Party
701 and 751 Series Enclosures and broadcasts
page announcements over the Page/Party
system speakers.

®

system. It mates directly with the

®

The Model 751-002 is constructed of 16-gauge
cold-rolled steel and is suitable for either indoor
or outdoor use.

Installation

CAUTION

equipment in hazardous areas or areas other
than those on the equipment approval list in
the “Specifications” section. Such installation
may cause a safety hazard and consequent
injury or property damage.

To install, plug the Model 751-002 Speaker Amplifier into the appropriate enclosure, and tighten the four
screws in the corners of the front panel. Refer to Figure 1 for typical installation details.

Do not install this

Figure 1. Model 751-002 Speaker Amplifier

(shown with an indoor enclosure)

GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA

610-777-1374  800-492-1212  Fax: [phone]

ISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS

V

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Adjustment

Model 751-002 Speaker Amplifier mates with an enclosure wired directly to a speaker. The speaker
volume adjustment is located under the GAI-Tronics nameplate on the front panel. Refer to Figure 1.
Use a small flat-blade screwdriver to adjust the speaker sound volume.

Maintenance

The following table lists some hints to aid technicians in troubleshooting:

Troubleshooting

Problem Solution

Feedback/distortion (a hum or
buzz on the line) occurs during
all Page/Party

®

station operation.

Associated speaker level requires
adjustment.

The line may be improperly terminated. Inspect the system cable

for loose connections, shorts, and grounds. Line balance assembly
connections are critical.

Adjust the speaker volume control located on the amplifier front

panel, behind the nameplate. Refer to Figure 1. Use a small
standard screwdriver to perform these adjustments.

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Specifications

Input voltage ...................................................................................... 21–28.8 V dc range, 25 V dc nominal

Power consumed............................................................................................................ Zero signal: 0.25 W

Max signal: 27 W

Construction/finish ................................................................ 16-gauge cold-rolled steel/gray polyurethane

Amplifier output ............................... Push-pull, Class B, 12 watts minimum, with nominal supply voltage

Amplifier sensitivity.............................................................................................. 0.5 V ac, for rated output

Frequency response........................................................................... 250–4,000 Hz, +0/−3 dB ref. to 1 kHz

Distortion ......................................................................................... 1% maximum THD @ 1 kHz, 12 watts

Input impedance.......................................................................................................... 50,000 ohms nominal

Controls........................................................................... Speaker volume (adjusted through an access hole

behind the nameplate on the front panel)

Temperature range............................................................................ −22° F to +158° F (−30° C to +70º C)

Dimensions ................................................................. 8.1 H × 8.1 W × 3.0 D inches; (206 × 206 × 76 mm)

Shipping weight .................................................................................................................... 5.6 lbs. (2.6 kg)

Approvals

NRTL Listed for USA and Canada ................................................... Class I, Div. 2, Groups A, B, C, D

when used with listed GAI-Tronics Model 702 or 703 24 V dc series enclosures

Class I, Div. 2, Groups A, B, C, D
Class II, Div. 2, Groups F and G;
Class III, Div. 2, when used with listed
GAI-Tronics Model 732, 758, 7325, 733, or 7335 24 V dc series enclosures

CE Mark

Replacement Parts

Part Number Description

10440-002 Maintenance Cable

46101-012 Screw Kit

12523-001 GAI-Tronics Nameplate Kit

12601-001 Standoffs (10 pack)

12604-004 Fuse, Slow-Blow, 2 A (10 pack)

25210-005 Gasket

69701-012 Speaker Amplifier PCBA

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Warranty

Equipment. GAI-Tronics warrants for a period of one (1) year from the date of shipment, that any

GAI-Tronics equipment supplied hereunder shall be free of defects in material and workmanship, shall
comply with the then-current product specifications and product literature, and if applicable, shall be fit
for the purpose specified in the agreed-upon quotation or proposal document. If (a) Seller’s goods prove
to be defective in workmanship and/or material under normal and proper usage, or unfit for the purpose
specified and agreed upon, and (b) Buyer’s claim is made within the warranty period set forth above,
Buyer may return such goods to GAI-Tronics’ nearest depot repair facility, freight prepaid, at which time
they will be repaired or replaced, at Seller’s option, without charge to Buyer. Repair or replacement shall
be Buyer’s sole and exclusive remedy. The warranty period on any repaired or replacement equipment
shall be the greater of the ninety (90) day repair warranty or one (1) year from the date the original
equipment was shipped. In no event shall GAI-Tronics warranty obligations with respect to equipment
exceed 100% of the total cost of the equipment supplied hereunder. Buyer may also be entitled to the
manufacturer’s warranty on any third-party goods supplied by GAI-Tronics hereunder. The applicability
of any such third-party warranty will be determined by GAI-Tronics.

Services. Any services GAI-Tronics provides hereunder, whether directly or through subcontractors,

shall be performed in accordance with the standard of care with which such services are normally
provided in the industry. If the services fail to meet the applicable industry standard, GAI-Tronics will
re-perform such services at no cost to buyer to correct said deficiency to Company's satisfaction provided
any and all issues are identified prior to the demobilization of the Contractor’s personnel from the work
site. Re-performance of services shall be Buyer’s sole and exclusive remedy, and in no event shall GAI­Tronics warranty obligations with respect to services exceed 100% of the total cost of the services
provided hereunder.

Warranty Periods. Every claim by Buyer alleging a defect in the goods and/or services provided

hereunder shall be deemed waived unless such claim is made in writing within the applicable warranty
periods as set forth above. Provided, however, that if the defect complained of is latent and not
discoverable within the above warranty periods, every claim arising on account of such latent defect shall
be deemed waived unless it is made in writing within a reasonable time after such latent defect is or
should have been discovered by Buyer.

Limitations / Exclusions. The warranties herein shall not apply to, and GAI-Tronics shall not be

responsible for, any damage to the goods or failure of the services supplied hereunder, to the extent
caused by Buyer’s neglect, failure to follow operational and maintenance procedures provided with the
equipment, or the use of technicians not specifically authorized by GAI-Tronics to maintain or service the
equipment. THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE IN LIEU OF AND
EXCLUDE ALL OTHER WARRANTIES AND REMEDIES, WHETHER EXPRESS OR IMPLIED BY
OPERATION OF LAW OR OTHERWISE, INCLUDING ANY WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

Return Policy

If the equipment requires service, contact your Regional Service Center for a return authorization number
(RA#). Equipment should be shipped prepaid to GAI-Tronics with a return authorization number and a
purchase order number. If the equipment is under warranty, repairs or a replacement will be made in
accordance with the warranty policy set forth above. Please include a written explanation of all defects to
assist our technicians in their troubleshooting efforts.

Call 800-492-1212 (inside the USA) or 610-777-1374 (outside the USA) for help identifying the
Regional Service Center closest to you.

(Rev. 10/06)