Datron World Communications Inc. RT7000 HF TRANSCEIVER FIELD MAINTENANCE PROCEDURES

Datron World Communications Inc.

RT7000 HF TRANSCEIVERFIELD MAINTENANCE PROCEDURES




PERIODIC PERFORMANCE TESTS

• B.I.T.E. (Built In Test Equipment)

• BASIC PERFORMANCE TEST


B.I.T.EDESIGNED TO AID IN TROUBLESHOOTING THE

EQUIPMENT DOWN TO THE MODULE LEVEL

• CHECKS THAT EACH BOARD IS PRESENT

• CHECK FOR PRESCNESE OF INTERNAL OPTIONS

• CHECKS THE PERFORMANCE OF CERTAIN KEY PARAMETERS

• VERIFIES PROPER VOLTAGES IN EACH MODULE

• IT IS ACTIVATED AUTOMATICALLY UPON RADIO POWER UP OR IS MANUALY ACTIVATED BY ALPHA – 20 ON THE KEYPAD


BASIC PERFORMANCE TEST

1. VERIFY SOURCE AC OR DC INPUT POWER

2. ATTACH MICHROPHONE

3. ATTACH 50 OHM ANTENNA

4. TURN POWER SWITCH “ON”

5. VERIFY BITE CIRCUIT ACTIVATION

6. TURN SPEAKER SWITCH ON AND VOL CONTROL UP

7. SELECT A KNOWN FREQUENCY AND LISTEN AND INSURE THERE IS AUDIO PRESENT AT BOTH MIC CONNECTORS AND SPEAKER


REAR POWER CONNECTOR

PIN A +V

PIN B GROUND

A

B

BA


POWER DISTRIBUTION


TRANSCEIVER POWER CHART


BOARD LOCATIONS


RECEIVE PATH


DISASSEMBLY


TRANSMIT PATH


POSSIBLE FAULTS ANDCORRECTION PROCEDURES


NO FRONT PANEL CONTROL

THIS CONDITION IS AN INDICATOR THAT THE MAINPROCESSOR BOARD IS OUT OF LOCK AND MUST BE RESET

• TURN THE RADIO OFF

• REMOVE THE TOP COVER

• PLACE A JUMPER AT JU10-D OF THE PROCESSOR BOARD

• TURN THE RADIO ON AND KEEP THE JUMPER ON JU10-D

• TURN THE RADIO OFF AND REMOVE THE JUMPER

AT THIS POINT THE RADIO IS RESET TO THE NORMAL FACTORY SETTINGS


TRANSCEIVER DOES NOTTURN ON

• CHECK EXTERNAL POWER SOURCE FOR 11 – 16 Vdc

• MEASURE DC VOLTAGE AT REAR PANEL

• CHECK THE REAR PANEL FUSE

• CHECK THE FRONT PANEL POWER SWITCH FOR PROPER MECHANICAL OPERATON

• MEASURE THE INTERNAL POWER SUPPLY VOLTAGE REGULATORS


NO FRONT PANEL CONTROL

• TURN RADIO OFF THEN ON

• VERIFY RIBBON CABLE IS PROPERLY CONNECTED

• RESET THE MAIN PROCESSOR

• SYSTEMATICALLY REPLACE EACH BOARD UNTIL PROBLEM IS CORRECTED


NO FRONT DISPLAY

• VERIFY FRONT PANEL VOLTAGE REGULATORS AT J1 PINS 3, 4 FOR +12 and +5 Volts DC

• VERIFY THAT ALL CABLES ON THE FRONT PANEL ARE PROPERLY SEATED AND CONNECTED


NO RECEIVE AUDIO

SYSTEMATICALLY REPLACE THE FOLLOWING BOARDS

• 75 Mhz IF Board

• 5 Mhz IF Board

• Audio Board

1. VERIFY THAT THE SPEAKER SWITCH IS ON

2. VERIFY THAT THE VOLUME KNOB IS AT LEAST HALF WAY


NO TRANSMIT

• VERIFY THAT ALPHA 18 (RX/TX) IS ON

• CHECK THAT THE MICROPHONE IS NOT DEFECTIVE

• VERIFY THAT ALL FRONT PANEL CABLES ARE CONNECTED

• SYSTEMATICALLY REPLACE THE FOLLOWING BOARDS

• 75 Mhz IF Board

• 5 Mhz IF Board

• AUDIO Board

• RF FILTER BOARD RX/TX RELAY

• PA Board


POWER LEVEL VERIFICATIONAND SETTING

• SELECT LOW POWER

• PRESS ALPHA 5 ON THE DISPLAY THEN “E”

• ENTER THE NUMBER 5 AND PRESS “E”

• REPETE THIS PROCESS FOR MEDIUM AND HIGH POWER


Documents

Datron World Communications Inc. RT7000 HF TRANSCEIVER FIELD MAINTENANCE PROCEDURES