Valcom V-1038 Service Manual

VSP-V-1038

Issue 8

V-1038
PAGING HORN/AMPLIFIER ASSEMBLY
30 WATT -48VDC WITH VOLUME CONTROL

INTRODUCTION

This instruction provides identification, installation
and technical assistance information for the V -1038
Horn/Amplifier Assembly.

This paging unit has received a FCC type KX
registration and is designed to be used with FCC
registered key telephone systems. In accordance with
FCC rules with applicable tariffs, this Paging Unit may
only be installed with the authorization of the host
system. Installations may be made by Valcom, Inc.,
an authorized agent of the same, equipment
manufacturers, telephone companies, registered
telephone refurbishers and those qualified for
installation of FCC registered systems under FCC
Rules Section 68.215. The FCC Registration Number,
BAF9I7-69358-KX-N, will be listed in the affidavits
filed with the Telephone Company; it will also be
recorded in the system log kept by installation and
maintenance personnel.

DESCRIPTION

The V -1038 Paging Horn/Amplifier Assembly is a
self-contained 30 Watt paging system incorporating:

(a) 30 Watt amplifier
(b) Volume control
(c) High efficiency horn

Dimensions/Weight

• 7.38" H x 10.00" W x 10.40" D
(18.75cm H x 25.40cm W x 26.42cm D)

• 4.1 lbs. (1.86kg)

Nominal Specifications:

Input impedance: 600 Ohms minimum
Input level: 10dBm nominal
Current at -48VDC: 1 Amp

Connections:

Green Tip Audio Source
Red Ring Audio Source
White -48VDC Power
Black Ground Power

Due to the low -level signal required, distribution
wiring is nor mally accomplished through house cable
pair or station wire.

Typical applications include:

(a) Use with a Valcom page control.
(b) Expanding the capability of telephone

system’s which contain limited paging
capabilities.

(c) Loud ringer application in systems where

loud speaker tone signaling is employed.

INSTALLATION

This horn may be used for either interior or exterior
paging applications and should be installed 16 to 40
feet from the floor taking into account installation and
maintenance access.

Connect station wire (or other suitable pairs) to the
proper speaker connection. When using station wire,
limit the maximum run to 250 feet. Two horns may be
connected to the same pairs if the total run is less
than 125 feet.

When a remote power unit is used, the audio pair run
should be limited to 5000 feet and a maximum of 6
horns.

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The volume control is factory pre-set approximately
mid-way. As the system is put in operation, the
individual volume controls may be readjusted as
necessary.

By loosening the knob on the base approximately four
turns, the horn may be rotated or moved up and down
to obtain the desired position.

TECHNICAL ASSISTANCE

When trouble is reported, verify that power is being
supplied to the unit and there are no broken
connections. Check voltages for proper polarity on
the crossconnect block.

Assistance in troubleshooting is available from the
factory. When calling, you should have a VOM, a

Used in conjunction with the Valcom Page Control

telephone test set, and several clip leads available and
be calling from the job site. Call [phone] and
ask for Technical Support, or call [phone] for
Valcom 24-hour Faxback System or visit our website
at http://www.valcom.com.

Valcom equipment is not field repairable. Valcom, Inc.
maintains service facilities in Roanoke, VA. Should
repairs be necessary, attach a tag to the unit clearly
stating company name, address, phone number,
contact person and the nature of the problem. Send
the unit to:

Valcom, Inc.

Repair and Return Dept.

5614 Hollins Road

Roanoke, VA 24019-5056

Valcom
Page
Control

Green
Red

Black

White

GND -48VDC

Used to expand loudspeaker paging capabilities

System
Page
Amplifier
457 KTU
or
equiv.

GND -48VDC

Green

Red

Black

White

Used to expand existing 70 volt paging systems

70V or
25V Amp

1/4W Tap

V-1095

8 Ohm
Output

V-1038

V-1038

Green

V-1038

Red

Black

White

GND-48VDC

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TROUBLESHOOTING CHART

PROBLEMS

No Sound

Low Volume

Loud Squeal (feedback)

PROBABLE CAUSES AND CORRECTIONS

1. Check that volume control is turned up.

2. Check presence of -48VDC and GND.

3. Make sure the WHT wire is connected to -48VDC.

4. Using a lineman's test set, check for the proper audio level on the
T & R leads, and if necessary also at the source.

1. Check that volume control is turned up.

2. Check voltage at the horn when in use: -40 to -50 Volts required.

3. Using a lineman's test set, check for the proper audio level on the
T & R leads - it is possible that some sound will be heard with only
one side of Tip and Ring.

1. Lower volume of speaker.

2. Aim horn in different direction.

3. Move horn to location further from phone.

4. Install confidencer on phone in severe problem area.

VALCOM LIMITED WARRANTY

Valcom, Inc. warrants its products to be free from defects in materials and workmanship under conditions of normal use and service
for a period of one year from the date of shipment. The obligation under this warranty shall be limited to the replacement, repair or
refund of any such defective device within the warranty period, provided that:

1. inspection by Valcom, Inc. indicates the validity of the claim,

2. the defect is not the result of damage, misuse, or negligence after the original shipment,

3. the product has not been altered in any way or repaired by others and that factory sealed units are unopened (A service

4. freight charges for the return of products to Valcom are prepaid,

5. all units ‘out of warranty’ are subject to a service charge. The service charge will cover minor repairs (Major repairs will be

This warranty is in lieu of and excludes all other warranties, expressed or implied, and in no event shall Valcom, Inc. be liable
for any anticipated profits, consequential damages, loss of time or other losses incurred by the buyer in connection with the
purchase, operation, or use of the product.

This warranty specifically excludes damage incurred in shipment. In the event a product is received in damaged condition, the
carrier should be notified immediately. Claims for such damage should be filed with the carrier involved in accordance with the
F.O.B. point.

Headquarters: In Canada
Valcom, Inc. CMX Corporation
5614 Hollins Road 35 Van Kirk Drive #11 and 12
Roanoke, VA 24019-5056 Brampton, Ontario L7A1A5
Phone: [phone] Phone: [phone]
FAX: [phone] FAX: [phone]

charge plus parts and labor will be applied to units defaced or physically damaged),

subject to additional charges for parts and labor).

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