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In Case of Difficulty

The majority of difficulties with Vega wireless mics are not due to equipment
failure. Vega equipment is fully tested before leaving the factory. In most instances,
problems are due to equipment application.

The following paragraphs describe the most commonly encountered application
problems. If you are having difficulties with Vega equipment, please review this
information and take any necessary corrective action prior to returning the
equipment for repair.

Most users of Vega equipment enjoy years of troublefree operation. However, as
with all electronic devices, problems might be encountered eventually. If you
experience difficulty with your Vega wireless microphone within the first year of
operation, it will be repaired under warranty (see below). Service for older units may
also be obtained from Vega; contact the factory or your sales representative for
information.

General

Contact the Vega factory or your sales representative prior to returning equipment
for repair. Often, the problem can be resolved by phone, avoiding downtime for
unnecessary returns. However, should repairs be necessary, Vega will promptly
correct the problem and return the unit. Return both the transmitter and the receiver,
to allow us to perform a complete checkout and test of the entire system. This can be
especially helpful for elusive or intermittent problems

Battery

The most common problems with wireless-microphone systems are those related to
the batteries. Vega recommends that only new, fresh Duracell MN1604 or
“Eveready” Energizer No. 522 alkaline batteries be used. No other batteries tested by
Vega provide equal life and reliability. Other batteries might work, but battery life
probably will be short and current inadequate.

Rechargeable batteries (“ni-cads”) are not recommended for use with T-680
transmitters. Their limited capacity does not provide adequate operating time.

Exhausted batteries will cause numerous problems, including distortion, audible
squeals and howls, poor range, and off-frequency operation. It is strongly
recommended that the battery be checked prior to each use, and that it be replaced if
there is any question about its condition. It is also good practice to try replacing the
battery with a fresh unit in the event of any sort of problem with the system, because
a low battery might affect system operation in subtle ways.

Battery contacts must be clean and unbroken. Attempted forced reverse insertion of
a battery is practically impossible, but the attempt will often damage the battery
contacts. Some “9-volt” batteries sold are larger (or smaller) than standard and either
might fail to work or might damage the contacts when inserted. Damage to the
contacts usually requires a return to the factory or authorized service center.

8

T-680 Series

Summary of Contents for T-680 Series

Page 1: ...Vega T 680 Series UHF PRO PLUS Wireless Microphone Owner s Manual 099 0054B T 682 T 689 T 687 T 688 ...

Page 2: ...t They have the training and test equipment necessary to restore your equipment to its peak performance Please feel free to contact either your authorized Vega dealer or the Vega factory for information or assistance at any time Quick Start See below for a description of transmitter controls and the next page for setup If this is the first time you are setting up a wireless system carefully read a...

Page 3: ...rophone M on by sliding the switches toward the dots 2 With a small screwdriver adjust transmitter mic level so the receiver s AUDIO LEVEL LED flashes only when speaking very loudly If it flashes frequently turn it counterclockwise If it doesn t flash at all turn it clockwise 4 In the area covered by the wireless system verify the receiver is receiving by observing its indicators see receiver inst...

Page 4: ... location proper frequency selection and spacing are required to avoid possible interference Vega offers a free frequency coordination service for purchasers of its equipment Frequencies are selected by computer to avoid any possible interference from other wireless systems and broadcast stations To take advantage of this free service contact the Vega factory or your local sales representative pho...

Page 5: ...hould be audible on the associated monitoring equipment The audio may also be monitored on headphones plugged into the receiver monitor jack 8 Adjust the transmitter audio gain control if necessary When speaking or singing very loudly the LED on the transmitter should flash on only on the very loudest voice peaks This indicates that the transmitter is reaching the point where soft gain compression...

Page 6: ...eceiver and the transmitter good results can usually be obtained Optional Antennas If you wish to have the receiver in a location which does not have a clear line of sight path to the transmitter another type of antenna will be needed Vega offers magnet mount 1 4 wave whip and ground plane antennas with an attached 15 foot 4 6 m cable which may be used for this purpose Two such antennas are requir...

Page 7: ... members aluminum window frames and equipment cabinets must be avoided Whip and dipole antennas require at least a 5 inch 0 13 m minimum spacing from metal surfaces Other types of antennas may require greater spacings The radiation pattern of these antennas is much larger than the antenna itself Consequently even objects well off to one side of the line of sight path can distort the antenna patter...

Page 8: ...ire system This can be especially helpful for elusive or intermittent problems Battery The most common problems with wireless microphone systems are those related to the batteries Vega recommends that only new fresh Duracell MN1604 or Eveready Energizer No 522 alkaline batteries be used No other batteries tested by Vega provide equal life and reliability Other batteries might work but battery life...

Page 9: ...formance The receive antennas should be positioned away from these sources of RF noise to minimize the effect of this interference Fortunately this type of problem is surprisingly rare A more serious problem is selection of wireless microphone operating frequencies which are inherently subject to interference due to intermodulation Fortunately a proper initial selection or changing frequencies wil...

Page 10: ... Vega FaxBack Information including more detailed procedures schematics and other Vega products is available 24 hours per day from Vega s FaxBack system Simply call 626 444 2017 or 800 274 2017 then follow the voice instructions Warranty Limited All Vega PRO PLUS wireless products are guaranteed against malfunction due to defects in materials and workmanship for one year beginning at the date of o...

Page 11: ...ver for a full system performance test when practical Factory Service Center Vega 9900 E Baldwin Place El Monte CA 91731 2294 626 442 0782 Claims No liability will be accepted for damages directly or indirectly arising from the use of our materials or from any other causes Our liability shall be expressly limited to replacement or repair of defective materials Wireless Microphones 11 ...

Page 12: ...stem distortion is less than 0 4 at 25 dB compression Antenna Patented Internal dipole Battery 9 V alkaline Duracell MN1604 recommended Length Varies by model from 9 85 in 25 cm to 10 75 in 27 3 cm Weight Varies by model from 9 oz 256 g to 13 5 oz 385 g including battery UHF PRO PLUS System Specifications with R 662A or R 662B receivers Working Range 1 700 ft under good conditions 500 ft or more u...

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