GAI-Tronics 12250-004 User Manual

Pub. 42003-204A

GAI-TRONICS® CORPORATION

A HUBBELL COMPANY

Volume Level Control Receiver Assembly

(24 V DC) Replacement Ki t

MODEL 12250-004

Confidentiality Notice

This manual is pr ovided s olely as a n op erat ional, installation, and maintenance guide and contains sens itive
bus ines s and t echnic al infor ma tion tha t is confident i al and p roprietary to G AI-Tronics. GAI-Tronics
retains a ll intellectual pr operty and other rights in or to t he inf ormation c ontained herein, and s uch
informa tion may only be used in connection wit h the operation of you r GAI- Tronic s pr oduct or system.
This ma nual may not be disclosed in any form, in whole or in p art, dir ec tly or indirectly, to any t hird pa rty.

General Information

This kit is for use on t he following 24 V dc ha ndset/speaker amplifiers and s peaker amplifiers with the
corresponding p rinted circuit boa rd assembly (P CBA):

24 V DC
Amplifiers
Model No.

701-103 69701-102
701-203 69701-005
701-207 69701-011
701-307 69701-015
713-102 69713-202
723-003 69723-202
751-002 69701-012

OTES:

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1. This volume level control (VLC) kit can be us ed on older G AI - Tronic s amplifiers (not listed); however ,

it is not recommended. Amplifier models not inc l u ded on t he lis t on pa ge 1 have been obsolet e s inc e
the 1987–1989 time period, and replacement parts for them are available on a limited basis. If the
VLC is to be installed in a stat ion with an older amplifier, replace amplifier with a listed model
(possibly switching amplif iers from a location that does not requ ire a VLC and has a newer , list ed
amplifier).

PCBA No.

GAI-Tronics Corporation P.O. Box 1060, Reading, PA 19607-1060 USA

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

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

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ODEL 12250-004 VOLUME LEVEL CONTROL RECEIVER ASS’Y (24 V DC) REPLACEMENT KIT Page: 2 of 6

2. All agency ap provals are nullified with the addition of VL C as sembly, if not f actory installed.

This kit includes the following components:

Qty Description

1 Volume Level Control Receiver Assembly (for 24 V dc app lic ations only)
2

Screw, 6-32 × ¼-inch PHMS
1 Resistor, ¼-watt, 5%
1 Templa te (for loc ating drilling holes)
1 Tie Wrap

OTE: All items contained in t his kit may not b e required in a ll insta llations .

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Installation

Models 701-103, 701-203, 701-207, 701-307, 713-102, 723-003 and 751-002

Figure 1. VLC Assembly

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ODEL 12250-004 VOLUME LEVEL CONTROL RECEIVER ASS’Y (24 V DC) REPLACEMENT KIT Page: 3 of 6

Figure 2. VLC PCBA Component Loc ation

Disassemb ly

1. Loosen the four front p anel screws, and remove the a mplif ier fr om the enclosur e.

2. Loosen the f our s c rews on the s i de, and s lide t he chass is to remove the front panel. I f the unit does not

conta i n a handset, immediat ely s et the front pa nel aside.

3. If the u nit contains a hands et , disconnect the wir es at t he p rinted circui t boa rd assembly (P CBA), and

set t he front p anel aside. Note the wire color and location prior to removal to a llow f or eas ier re­assembly.

OTE: Skip Step 4 if the amplifier does not have a c hassis-mounted transformer.

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4. Pla ce the chassis on the bench with the connector toward you. Dis c onnec t the transformer by removing

the two mount ing screws. Disconnect the 6-pin Molex connector from the PC BA, and s et it a side.

CAUTION

Removal of the PCBA befor e dr illing is advisable.

5. Loosen the two screws holding the a mp henol connector to the cha ssis .

6. Using pliers, press the plastic standoffs through the back of the chassis to remove the PCBA. Set the

PCB A aside. B e careful not to brea k the standoffs when p ushing them through.

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