GENERAL INFORMATION
are times when the technicians have specific questions that need to be answered in order to completely iden- tify and repair a problem.
When returning equipment for repair, it is also a good idea to use a PO number or some other reference number on your paperwork in case you need to call the repair lab about your unit. These numbers are referenced on the repair order and it makes it easier and faster to locate your unit in the lab.
Return Authorization (RA) numbers are not necessary unless you have been given one by the Field Service Department. RA numbers are required for exchange units or if the Field Service Department wants to be aware of a specific problem. If you have been given an RA number, reference this number on the Factory Repair Request Form sent with the unit. The repair lab will then contact the Field Service Department when the unit arrives.
1.8 REPLACEMENT PARTS
Replacement parts can be ordered directly from the Service Parts Department. To order parts by phone, dial the
You may also send your order by mail or FAX. The mailing address is as follows and the FAX number is shown in Section 1.6.
E.F. Johnson Company
Service Parts Department
299 Johnson Avenue
P.O. Box 1249
Waseca, MN
1.9 INTERNET HOME PAGE
EFJohnson has a site on the World Wide Web that can be accessed for information on the company and such things as products, systems, and regulations. The address is http://www.efjohnson.com.
1.10 INTRINSICALLY SAFE INFORMATION
NOTE: Contact your sales representative to determine the availability of intrinsically safe models.
1.10.1 INTRODUCTION
Intrinsically safe 7780 transceivers have been approved by the Factory Mutual Research Corporation for operation in certain flammable atmospheres. The specific atmospheres in which operation is approved are shown in Section 1.10.5 and also on the label on the back cover of the transceiver.
WARNING
When servicing an intrinsically safe transceiver, these rules must be followed to maintain intrinsic safety:
•Service can be provided only by the factory or by service centers specifically authorized by the Factory Mutual Research Corporation to service E.F. Johnson intrinsically safe transceivers. Contact Factory Mutual at the following address for infor- mation concerning their auditing procedure. Contact the E.F. Johnson Customer Service Depart- ment as described in Section 1.6 if you have questions.
Factory Mutual Research Corporation 1151
Norwood, Massachusetts 02062 Phone: (617)
•Replace the battery pack only with Intrinsically Safe Battery Pack, Part No.
•Do not make any modifications to the circuitry.
•When replacing a part, use only the exact replace- ment part listed in the service manual parts list.
•Do not install any accessory that is not specifically approved for use with intrinsically safe 7780 models.
1.10.2 DEFINITIONS
Intrinsically Safe - This is a fire rating given to these transceivers by the Factory Mutual Research Corpora-
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