This equipment is used for both distress communication and routine
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.
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
Procedures for locating malfunctions
First, check the power supply voltage and connectors.
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
malfunctions. If the user is to locate the malfunction himself, perform only No. 1 and No. 2.
Faults requiring no instrument to locate
Malfunctions that can be discovered
and repaired with a tester
Malfunctions requiring special instrument
Type of Malfunction
・ Faulty connector contacts
・ Broken antenna cables
・ Defective switches, controls, etc.
・ Other problems that can be visually detected
・ Confirmation of power supply voltage
・ Breaks in external wiring
・ Crystal oscillator frequency deviation
・ Decrease in transmitting power and reception
・ Decrease in transmitter modulation level
・ Malfunction in semiconductors, ICs, and similar
Maintenance & Inspection