V-9928 - Receiver Valcom - Free user manual and instructions

Product Type	5 Watt Amplifier with Volume Control
Applications	One-way voice paging; Electronic key or PABX page port; Remote amplifier
Capacity	Drives up to 6 (six) 45 Ohm speakers
Dimensions (H x W x D)	4.5" x 2.75" x 2.8" (11.43 cm x 6.99 cm x 7.11 cm)
Weight	0.8 lb (0.36 kg)
Power Requirements	-21 to -26 Vdc signal battery
Idle Current	8 mA
Operating Current	267 mA
Frequency Response	80 Hz to 10,000 Hz + 3 dB
Input Impedance	600 Ohms
Output Impedance	8 Ohms
Mounting	Surface mount using two screws
Audio and Power Connections	Standard twisted pair telephone cable; T, R, battery, ground terminals
Warranty	One year from date of shipment against defects in materials and workmanship
Technical Support	Phone: [phone]; Automated Support: [phone]; Web: www.valcom.com
Repairs	Not field repairable; send to Valcom, Inc., 5614 Hollins Road, Roanoke, VA 24019-5056

Frequently Asked Questions - V-9928 Valcom

What power supply is required for the V-9928?

The V-9928 requires a -21 to -26 Vdc signal battery. It draws 8 mA idle and 267 mA operating.

How many speakers can the V-9928 drive?

It can drive up to six (6) 45 Ohm speakers.

What is the frequency response of the V-9928?

The frequency response is 80 Hz to 10,000 Hz + 3 dB.

How do I mount the V-9928?

Mount the V-9928 to any suitable surface using two screws to fasten the box to the surface.

What type of cable is used for connections?

Standard twisted pair telephone cable is used for audio and power connections.

What should I check if there is no sound?

Check that the volume control is turned up. Verify the presence of -24 Vdc and ground. Use a lineman's test set to check audio level on T&R leads.

How can I fix low volume?

Ensure volume control is turned up. Check voltage at V-9928 when in use (should be -18 to -24 Vdc). Use a lineman's test set to check audio level on T&R leads.

What causes loud squeal (feedback) and how to fix?

Feedback can be caused by high volume, speaker direction, or proximity to phone. Lower volume, aim horn away, move horn further from phone, or install a confidencer on the phone.

What is the warranty period for the V-9928?

Valcom warrants the V-9928 to be free from defects for one year from date of shipment.

Can I repair the V-9928 myself?

No, the V-9928 is not field repairable. For repairs, send the unit to Valcom, Inc., Repair and Return Dept., 5614 Hollins Road, Roanoke, VA 24019-5056.

USER MANUAL V-9928 Valcom

V-9928 5 WATT AMPLIFIER WITH VOLUME CONTROL

INTRODUCTION

These instructions contain the specifications and information necessary to install, operate, and maintain the V-9928, 5 Watt Amplifier with Volume Control.

SPECIFICATIONS

Purpose

Provides up to 5 watt of audio power for one-way voice paging.

Applications

• Electronic key or PABX page port
- Use for remote amplifier

Capacity

The V-9928, 5 watt amplifier with volume control, will drive 6 (six) 45 Ohm speakers.

Dimensions/Weight

• 4.5"H x 2.75"W x 2.8"D (11.43cm H x 6.99cm W x 7.11cm D)
  • 0.8 lb. (.36 kg)

Power Requirements

• Voltage Range: -21 to -26 Vdc signal battery
- Idle Current: 8 mA
- Operating Current: 267 mA

Nominal Specifications

• Frequency response 80 Hz to 10,000 Hz + 3 dB
- 600 Ohm input
- 8 Ohm output
- 8 mA at 1000 Hz idle
• 267 mA at 1000 Hz operating

INSTALLATION

Mounting

Mount the V-9928 to any suitable surface using two screws to fasten the box to the surface.

Audio and Power Connections

Standard twisted pair telephone cable.

a. Connect amplifier input to terminals of the page output terminals of the telephone system.
b. Connect amplifier output terminals to speaker leads.
c. Connect battery and ground terminals of V-9928 to signal battery and signal ground respectively.

Refer to Figure 1 for connections.

TECHNICAL ASSISTANCE

When trouble is reported, verify power is being supplied to the unit and there are no broken connections. Check voltages for proper polarity. Refer to Table 1 for possible troubleshooting solutions.

Assistance in troubleshooting is available from the factory. When calling, you should have a VOM and a test set available and be calling from the job site. Call [phone] and ask for Technical Support, or call [phone] for Valcom 24-hour Automated Support 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

FIGURE 1 - CONNECTIONS

TABLE 1 - TROUBLESHOOTING CHART
Problem	Possible Solution
No Sound	1. Check that volume control is turned up.2. Check presence of -24 Vdc and GND.3. Using a lineman's test set, check for the proper audio level on T&R leads, and if necessary also at the source.
Low Volume	1. Check that volume control is turned up.2. Check voltage at the V-9928 when in use, -18 to -24 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 low intensity sound will be heard with only one side of Tip and Ring connected.
Loud Squeal (feedback)	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 areas.

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 charge plus parts and labor will be applied to units defaced or physically damaged),
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 subject to additional charges for parts and labor).

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

1111 Industry Avenue 35 Van Kirk Drive #11 and 12

Roanoke, VA 24013 Brampton, Ontario L7A1A5

Phone: [phone]

FAX: [phone]

Phone: [phone]

FAX: [phone]