Service manual

INTRODUCTION AND OPERATION
1-4
Month 2000
Part No. 001-2004-601
ence 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.
1.10 REPLACEMENT PARTS
E.F. Johnson replacement parts can be ordered
directly from the Service Parts Department. To order
parts by phone, dial the toll-free number and then
enter "1" as described in Section 1.10. When order-
ing, please supply the part number and quantity of
each part ordered. E.F. Johnson dealers also need to
give their account number.
If there is uncertainty about the part number,
include the designator (C112, for example) and the
model number of the equipment the part is from (refer
to Section 1.2).
You may also send your order by mail or FAX.
The mailing address is as follows and the FAX num-
ber is shown in Section 1.8.
E.F. Johnson Company
Service Parts Department
299 Johnson Avenue
P.O. Box 1249
Waseca, MN 56093-0514
1.11 INTERNET HOME PAGE
The E.F. Johnson Company has a home page on
the World Wide Web that can be accessed for informa-
tion on such things as products, systems, and regula-
tions. The address is http://www.efjohnson.com.
1.12 SOFTWARE UPDATES/REVISIONS
All inquiries concerning updated software, its
installation and revisions should be directed to the
Customer Service Department (see Section 1.8).
1.13 REPEATER OPERATION
1.13.1 MAIN PROCESSOR CARD (MPC)
Refer to Figure 1-4.
Programming Jack
J1 provides input connection from the computer
and the "flash memory" in the MPC. The program-
ming information in an IBM
®
PC programs the MPC
directly from the serial card through an interconnect
cable to the COM1 or COM2 port.
Reset
S1 provides a manual reset of the Main Processor
Card (MPC). A manual reset causes a complete
power-up restart.
Display and LEDs
Each combination of DS1 display read-out and
CR4/CR5 indication refers to an active alarm. See
Table 1-2 for alarms and definitions. LED indica-
tions: CR1 is blinking; MPC is operational, CR2 on;
380-470 MHz, off is 475-520 MHz and CR5 on; indi-
cates an LTR Repeater.
1.13.2 TEST MODE
When the Repeater is in Test mode the safety
measures are disabled. Therefore, if the Repeater is
keyed for an extended period and the power amplifier
temperature increase, thermal shutdown will not
occur. There are pop-up windows that appear in the
Test mode screens to alert the user that there is an
alarm and action should be taken.
Figure 1-3 ALARM IN TEST MODE
NOTE: Safety measures are disabled
RF Thermal Sense Alarm Condition Exists
Ok