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12     Service Information / If You Need To Call For Help

SERVICE INFORMATION
The VM1550 Audio-Video Modulator has been designed and
produced to provide trouble-free service. Should the need for
repair arise, EXTREME CAUTION SHOULD BE USED TO
AVOID A POTENTIALLY LETHAL ELECTRIC SHOCK.

The top cover is removable, and provides access to all
serviceable components. Schematic diagrams are available
from our customer service department for a nominal charge.

All internal adjustments require test equipment, and alignment
should be attempted only by a trained technician.

You may contact the R.L. DRAKE Service Department for
additional information or assistance by calling
(937) 746-6990, Monday through Friday, between
8:00 A.M. and 4:00 P.M. Eastern Time, except on holidays.

You may also contact the R.L. DRAKE Service Department
by E-mail at the following address:
service@rldrake.com
or by Telefax:
+1 (937) 743-4576.

Should you want to return your unit for service, package
the unit carefully using the original carton or other suitable
container.

Write your return address clearly on the shipping carton
and on an enclosed cover letter describing the service
required, symptoms or problems.  Also include your
daytime telephone number and a copy of your proof of
purchase.

The unit will be serviced under the terms of the
R.L. DRAKE COMPANY Limited Warranty and returned to
you.

Red is an overnight service. Send the unit in a way that it
can be traced if we can’t verify receipt of shipment. We
suggest UPS or insured postal shipment.

If the unit is still under the original owner’s warranty,
R.L. DRAKE will pay the cost of the return shipment to
you. Our return shipping policy is that we will return it UPS
Brown if received Brown or by US Mail, it will be returned
Blue if received Blue or Red—or it will be returned
however you prefer if you furnish the return cost for the
method you select.
If the unit is out of warranty, it will be returned by UPS
Brown label COD (UPS does not accept cash/currency)
unless:

1) It was received UPS Blue/Red, in which case it will be
returned UPS Blue/Red COD;
2) You designate billing to American ExPress, VISA,
MasterCard or Discover card;
3) You prepay the service charges with a personal check,
or
4) You specify some other method of return.

When calling, the technician can estimate the repair
charges for you over the phone. This is another good
reason to call before sending a unit in for repair.
Typically, equipment is repaired in five to ten working
days after it arrives at R.L. DRAKE if we have all the facts.
If we must call you, it may take longer.  R.L. DRAKE is not
responsible for damage caused by lightning, nonprofes-
sional alterations, “acts of God”, shipping damage, poor
storage/handling, etc. R.L. DRAKE will make note of any
shipping damage upon receipt.
Should your warranty card not be on file at R.L. DRAKE,
you will need to send proof of purchase to receive
warranty service. Typically, a copy of the invoice from an
R.L. DRAKE dealer will suffice. The warranty is for the
original owner only and is not transferable.

IF

IF

IF

IF

IF

 YOU NEED TO CALL FOR HELP

Call our Customer Service/Technical Support line at
(937) 746-6990 between 8:00 A.M. and 4:00 P.M. Eastern
Time, weekdays. Please have the unit’s serial number
available. We will also need to know the specifics of any
other equipment connected to the unit.
When calling, please have the unit up and running, near
the phone if possible. Our technician(s) will likely ask
certain questions to aid in diagnosis of the problem. Also,
have a voltmeter handy, if possible.

R.L. DRAKE also provides technical assistance by
e-mail: service@rldrake.com
or by Telefax: +1 (937) 743-4576.

Many of the products that are sent to us for repair are in
perfect working order when we receive them. For these
units, there is a standard checkout fee that you will be
charged.  Please perform whatever steps are applicable
from the installation sections of the Owner's Manual
before calling or writing—this could save unnecessary
phone charges.  Please do not return the unit without
contacting R.L. DRAKE first: it is preferred to help
troubleshoot the problem over the phone (or by mail) first,
saving you both time and money.

Inside the carton, enclose a note with your name, ad-
dress, daytime phone number, and a description of the
unit’s problem.
The unit must be sent to the following address:

Service Department
R.L. DRAKE COMPANY
230 Industrial Drive
Franklin, Ohio 45005 U.S.A.

Be sure to include your street address which will be
needed for UPS return. UPS Surface (Brown Label) takes
7-10 days to reach us depending on your location, Blue
takes 2-3 days.

Summary of Contents for VM1550

Page 1: ...Instruction Manual is a registered trademark of the R L Drake Company Copyright 2002 R L Drake Company P N 3857400K 3 2002 Printed in U S A VM1550 Commercial Video Modulator For use in NTSC systems...

Page 2: ...be moved with care Quick stops excessive force and uneven surfaces may cause the product and cart combination to overturn The lightning flash with arrow head symbol within an equilateral triangle is i...

Page 3: ...is grounded so as to provide some protection against voltage surges and built up static charges Article 810 of the National Electrical Code ANSI NFPA 70 provides information with regard to proper grou...

Page 4: ...is designed to accept video and audio baseband signals from a satellite receiver TV camera video tape recorder TV modulator or similar equipment The heterodyne conversion system in conjunction with t...

Page 5: ...Size Weight Consult factory for custom channels RF Frequency Range Channels Available Output Level Output Impedance A V Ratio Frequency Stability Intercarrier Frequency FCC Frequency Offsets Spurious...

Page 6: ...onnected to a source of AC power F2 AUDIO LEVEL Control The setting of this screwdriver adjustment determines the peak aural carrier deviation Clockwise rotation increases the carrier deviation Set th...

Page 7: ...AC power line outlet this cable grounds the instrument cabinet Connect to a nominal 115 VAC 10 60 Hz source Do not defeat the safety purpose of the attached line cord plug R1 RF OUT This is the modula...

Page 8: ...and either multi port combiners or combinations of two port combiners INSTALLATION NOTES Level adjustment provides optimum performance in multi channel installations The modulator outputs should be c...

Page 9: ...J K L M N O P Q R S T U V W AA BB CC DD EE FF GG HH B A N D L O W M I D H I G H S U P E R H Y P E R Channel Designation CABLE TV CHANNELS Visual Carrier Frequency MHz 55 25 61 25 67 25 77 25 83 25 91...

Page 10: ...ENT COVER THAT EXPOSES POTENTIALLY LETHAL VOLTAGES IF THE EQUIPMENT IS POWERED FROM AN AC POWER SOURCE REFER SERVICING TO A QUALIFIED TECHNICIAN ONLY CAUTION Audio Flat 3 2 1 3 2 1 FIGURE 4 VM1550 IF...

Page 11: ...Warranty Notes 11...

Page 12: ...personal check or 4 You specify some other method of return When calling the technician can estimate the repair charges for you over the phone This is another good reason to call before sending a uni...

Page 13: ...repair anduseareimportanttoobtainproperperformancefromthisproduct Thereforecarefully read the Instruction Manual This warranty does not apply to any defect that R L DRAKE COMPANY determines is due to...

Page 14: ...R L DRAKE COMPANY 230 Industrial Drive Franklin Ohio 45005 U S A Customer Service and Parts Telephone 1 937 746 6990 Telefax 1 937 743 4576 World Wide Web Site http www rldrake com...

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