Maintenance & Inspection
6-19
6.6 Troubleshooting
WARNING
This equipment is used for both distress communication and routine
communication. Contact JRC or our agent if any problem is observed in this
unit during routine operation or inspection.
Do not open the equipment to inspect or repair internal circuits. Inspection
or repairs by anyone other than a specialized technician may result in fire,
electrical shock, or malfunction. If internal inspection or repair is necessary,
contact our service center or agents.
6.6.1 Procedures for locating malfunctions
1) First, check the power supply voltage and connectors.
2) If there are no problems with the above, use a tester to check for errors.
The following table shows the instruments required for performing repairs and the severity of
the malfunctions. If the user is to locate the malfunction himself, perform only No. 1 and No.
2.
No. Type of Malfunction Examples
1
Faults requiring no instrument to
locate
・ Faulty connector contacts
・ Broken antenna cables
・ Defective switches, controls, etc.
・ Other problems that can be visually detected
2
Malfunctions that can be
discovered and repaired with a
tester
・ Confirmation of power supply voltage
・ Breaks in external wiring
3
Malfunctions requiring special
instrument
・ Fan malfunction in transceiver and ATU
enclosure fan
・ Crystal oscillator frequency deviation
・ Decrease in transmitting power and
reception sensitivity
・ Decrease in transmitter modulation level
・ Malfunction in semiconductors, ICs, and
similar devices
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