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JRC JSS-2250 Instruction Manual: Troubleshooting

Mf/hf radio equipment.
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6.5 Troubleshooting

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.
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.
6.5.1
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
malfunctions. If the user is to locate the malfunction himself, perform only No. 1 and No. 2.
No.
1
Faults requiring no instrument to locate
Malfunctions that can be discovered
2
and repaired with a tester
3
Malfunctions requiring special instrument
WARNING
Type of Malfunction
Examples
・ 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
・ Fan
malfunction
in
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
Maintenance & Inspection
Inspection
transceiver
and
ATU
6-11

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Jss-2500, Jss-2250n, Jss-2500n

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