
Maintenance & Inspection
6-10
6.7 Troubleshooting
WARNING
This unit is also used for the distress communication, in addition to usual
communication. Contact JRC or our agent if any problem is observed in this
unit on usual operation or inspection. Do NOT ignore or leave an y problems of
this unit.
Always use the specified fuse when replacing a fuse. Using a different fuse
may result in fire or malfunction.
Do not open the equipment to inspect or repair it. 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.
6.7.1 Procedures for locating malfunctions
1) First, check the power supply voltage, fuses, 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 effect repairs and the severity of the
malfunctions.
If required to locate the malfunction, with the exception of qualified service personnel, perform
the following No. 1 and 2 only.
No.
Type of Malfunction
Examples
1
Faults requiring no instrument to
locate
•
Blown power supply fuse
•
Faulty contacts
•
Broken antenna cables
•
Defective switches, volume, etc.
•
Other problems that can be visually detected
2
Malfunctions that can be fixed with
a tester and repaired
•
Power supply voltage confirmation
•
Breaks in internal wiring
3
Malfunctions requiring special
instrument
•
Crystal oscillator frequency error
•
Decrease in transmitting power and reception
sensitivity
•
Decrease in transmitter modulation level
•
Malfunctions in semiconductors, ICs, and
similar equipment
Содержание JHS-800S
Страница 1: ...MARINE VHF RADIOTELEPHONE Instruction Manual 7ZPJD0714...
Страница 2: ......
Страница 22: ...xx NVS 423R External Speaker...
Страница 34: ...Equipment Overview 1 6 4 AC DC power supply NBD 965 Unit mm Weight Approx 2 1 kg...
Страница 39: ...Equipment Overview 1 11 Unit mm Weight Approx 1 1 kg 11 External speaker NVS 423R...
Страница 40: ...Equipment Overview 1 12 1 5 Block diagram...
Страница 134: ...Disposal 8 1 8 DISPOSAL Observe all rules and regulations of the local authorities when disposing of this equipment...
Страница 150: ......
Страница 156: ...JUNE 2018 Edition 1...