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SERVICE AND REPAIR

If your system malfunctions, you should attempt to correct or isolate the trouble before concluding that the
equipment needs repair. Make sure you have followed the setup procedure and operating instructions. Check out
the inter-connecting cords and then go through the TROUBLESHOOTING section in the manual.

We strongly recommend that you

do not

try to repair the equipment yourself and

do not

have the local repair shop

attempt anything other than the simplest repair. If the repair is more complicated than a broken wire or loose
connection, send the unit to the factory for repair and service. Don’t attempt to adjust any controls inside the units.
Once set at the factory, the various controls and trimmers do not drift with age or vibration and never require
readjustment.

There are no adjustments inside that will make a malfunctioning unit start working

.

LECTROSONICS’ service department is equipped and staffed to quickly repair your equipment. In-warranty repairs
are made at no charge in accordance with the terms of the warranty. Out of warranty repairs are charged at a
modest flat rate plus parts and shipping. Since it takes almost as much time and effort to determine what is wrong
as it does to make the repair, there is a charge for an exact quotation. We will be happy to quote approximate
charges by phone for out of warranty repairs.

RETURNING UNITS FOR REPAIR

You will save yourself time and trouble if you will follow the steps below:

A.

DO NOT return equipment to the factory for repair without first contacting us by letter or by phone. We need to
know the nature of the problem, the model number and the serial number of the equipment. We also need a
phone number where you can be reached 8 am to 4 pm (Mountain Standard Time).

B.

After receiving your request, we will issue you a return authorization number (R.A.). This number will help
speed your repair through our receiving and repair departments. The return authorization number must be
clearly shown on the outside of the shipping container.

C. Pack the equipment carefully and ship to us, shipping costs prepaid. If necessary, we can provide you with the

proper packing materials. UPS is usually the best way to ship the units. Heavy units should be "double-boxed"
for safe transport.

D. We also strongly recommend that you insure the equipment, since we cannot be responsible for loss of or

damage to equipment that you ship. Of course, we insure the equipment when we ship it back to you.

Mailing address:

Shipping address:

Telephones:

Lectrosonics, Inc.

Lectrosonics, Inc.

(505) 892-4501

PO Box 15900

581 Laser Rd.

(800) 821-1121

Rio Rancho, NM 87174

Rio Rancho, NM 87124

FAX: (505) 892-6243

USA

USA

World Wide Web:

http://www.lectrosonics.com

email:

[email protected]

11

Summary of Contents for UM195

Page 1: ...UM195 BELT PACK TRANSMITTER OPERATING INSTRUCTIONS and trouble shooting guide LECTROSONICS INC Rio Rancho NM ...

Page 2: ......

Page 3: ... source 5 Volts of bias voltage is available to power electret mics with either positive or negative bias Level indicating LEDs are provided on the control panel to make level settings quick and accurate without having to view the receiver The battery compartment accepts any 9 Volt alkaline battery and makes a positive connection via self adjusting contacts The antenna is a detachable locking 1 4 ...

Page 4: ...e time constants are slower low frequency audio distortion will be low but high frequency transients will then be distorted The 195 system introduces an entirely new approach to solving this basic problem called dual band companding There are actually two separate compandors in the 195 system one for high frequencies and one for low frequencies A crossover network separates the frequency bands at ...

Page 5: ...ed until it receives the pilot tone from the matching transmitter even if a strong RF signal is present on the carrier frequency of the system This is extremely important in applications such as with an automatic sound system 75kHz deviation improves the capture ratio signal to noise ratio and AM rejection of a wireless system dramatically compared to the more commonly used 15kHz 75kHz deviation i...

Page 6: ... during this adjustment Even when the switch is turned off or on aburptly the pilot tone muting system prevents thumps or transients from occurring ON LAMP Glows brightly when the battery is good A weak or dim lamp means that the battery is weak and has about half an hour of operation left If the lamp fails to light the battery should be replaced The power lamp should light up in both the MUTE and...

Page 7: ...ver 40 dB Generally speaking some limiting is desirable in normal operation to improve the signal to noise ratio of the system The limiting action is not audible and does not create distortion A highly trained ear would hear only the compression of the peaks in the audio signal which is desirable with most tape recorders and many sound reinforcement systems MIC LEVEL Used to adjust the audio input...

Page 8: ...eries To open the battery compartment press outward on the cover door in the direction of the arrow as shown in the drawing Only firm sliding pressure is needed to open and close the battery door Swing the door open and take note of the polarity marked inside showing the location of the positive and negative terminals You can see the large and small contact holes inside the battery compartment wit...

Page 9: ...tually pass through to the amplifier This intentional delay eliminates turn on thumps and is controlled by the pilot tone squelch control OPERATING NOTES The MIC LEVEL control knob should not be used to control the volume of your sound system or recorder levels This gain adjustment matches the transmitter gain with the user s voice level and microphone positioning If the mic level is too high both...

Page 10: ...enna The UHF UM195 uses a 1 4 wave flexible wire to radiate the RF signal There is really not much difference between these two approaches with respect to the effect of the RF on the microphone capsule Even in transmitters that utilize a dangling wire the microphone is still part of the ground plane and is therefore still in the antenna circuit LECTROSONICS 1 2 3 4 5 Transmitter Input Jack M195 33...

Page 11: ...er mute switch is in the on position NO SOUND OR LOW SOUND LEVEL RECEIVER MOD LEVEL LEDs ARE ON AND VU METER INDICATES AUDIO 1 Receiver output level set too low 2 Receiver output is disconnected cable is defective or mis wired 3 Sound system or recorder input is turned down DISTORTED SOUND 1 Transmitter gain audio level is far too high Check mod level lamps on transmitter and receiver as it is bei...

Page 12: ...43 dB semi log rotary control Modulation indicators Dual LEDs indicate modulation level 12 dB below limiting and at the onset of limiting Controls 3 position OFF MUTE ON slide switch for noiseless turn on turn off operation Front panel knob adjusts audio gain Audio Input Jack Switchcraft 5 pin locking TA5F Antenna UM195 Detachable flexible wire supplied 50 Ohm port allows connection to test equipm...

Page 13: ... exact quotation We will be happy to quote approximate charges by phone for out of warranty repairs RETURNING UNITS FOR REPAIR You will save yourself time and trouble if you will follow the steps below A DO NOT return equipment to the factory for repair without first contacting us by letter or by phone We need to know the nature of the problem the model number and the serial number of the equipmen...

Page 14: ...evelop we will at our option repair or replace any defective parts without charge for either parts or labor If we cannot correct the defect in your equipment we will replace it at no charge with a similar new item We will pay for the cost of returning your merchandise to you This warranty applies only to items returned to us shipping costs prepaid within one year from the date of purchase This war...

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