Pub. 42003-203B
GAI-TRONICS® CORPORATION
A HUBBELL COMPANY
Volume Level Control Receiver Assembly
(120 V AC) Replacement Kit
MODEL 12250-002
Confidentiality Notice
This manual is provided solely as an operational, installation, and maintenance guide and contains
sensitive business and technical information that is confidential and proprietary to GAI-Tronics. GAITronics 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
This kit is for use on the following 120 V ac handset/speaker amplifiers and speaker amplifiers with the
corresponding printed circuit board assembly (PCBA):
Table 1. 120 V AC Handset/Speaker Amplifier
and Speaker Amplifier PCBA List
Amplifier
Model No.
651-001 69650-101
701-101 69701-101, 69701-007
701-102 69701-101, 69701-007
701-201 69701-004, 69701-007
701-202 69701-004, 69701-007
701-204 69701-006, 69701-009
701-205 69701-006, 69701-009
701-302 69701-008
701-304 69701-014
713-101 69713-201
723-001 69723-101, 69723-201
751-001 69701-010
PCBA No.
GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA
610-777-1374 800-492-1212 Fax: 610-796-5954
ISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
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ODEL 12250-002 VOLUME LEVEL CONTROL RECEIVER ASS’Y (120 V AC) REPLACEMENT KIT Page 2 of 7
NOTES:
1. This volume level control (VLC) kit can be used on older GAI-Tronics amplifiers (not listed);
however, it is not recommended. Amplifier models not included on the list on page 1 have been
obsolete since 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 station with an older amplifier, replace amplifier with a listed
model (possibly switching amplifiers from a location that does not require a VLC and has a newer,
listed amplifier).
2. All agency approvals are nullified with the addition of VLC assembly, if not factory installed.
This kit includes the following components:
Qty Description
1 Volume Level Control Receiver Assembly (for 120 V ac applications only)
2
Screw, 6-32 ¼-inch PHMS
1 Resistor, ¼-watt, 5%
1 Template (for locating drilling holes)
1 Tie wrap
N
OTES: All items contained in this kit may not be required in all installations.
Installation
Figure 1. VLC Assembly
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ODEL 12250-002 VOLUME LEVEL CONTROL RECEIVER ASS’Y (120 V AC) REPLACEMENT KIT Page 3 of 7
Figure 2. VLC PCBA Component Location
Disassembly
1. Loosen the four front panel screws, and remove the amplifier from the enclosure.
2. Loosen the four screws on the side, and slide the chassis to remove the front panel. If the unit does
not contain a handset, immediately set the front panel aside.
3. If the unit contains a handset, disconnect the wires at the printed circuit board assembly (PCBA), and
set the front panel aside. Note the wire color and location prior to removal to allow for easier reassembly.
OTE: Skip Step 4 if the amplifier does not have a chassis-mounted transformer.
N
4. Place the chassis on the bench with the connector toward you. Disconnect the transformer by
removing the two mounting screws. Disconnect the 6-pin Molex connector from the PCBA, and set
it aside.
N
OTE: On Models 701-204, 701-205, and 701-304 also disconnect the two 6-pin Molex connectors
from the PCBAs associated with the auxiliary handset jack. Make note of the connector(s) position
when removing them, as the connector(s) will be reinstalled later. Remember to save the parts.
CAUTION
Removal of the PCBA before drilling is advisable.
5. Loosen the two screws holding the amphenol connector to the chassis. If the amplifier contains a
small PCBA (Model 69072-001) mounted to the chassis, detach this by removing the four screws,
and set them aside. Note the board’s orientation.
6. Using pliers, press the plastic standoffs through the back of the chassis to remove the PCBA. Set the
PCBA aside. Be careful not to break the standoffs when pushing them through.
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