JRC JHS-800S, Инструкция по эксплуатации, Страница: 131 / 156

Maintenance & Inspection
6-11
6.7.2 Guide to locating faults
Use the following table as a guide to locating the causes of malfunctions in the equipment.
Additionally when contacting JRC or our agency, please provide the malfunction condition.
No. Symptom Typical causes
1 Nothing appears on the screen.
•
Abnormal power supply voltage
•
Main unit's power supply fuse is blown
•
Defective power supply switch, display circuit, or
control circuit
• Defective controller cable
2
is displayed but no voice is
transmitted.
•
Malfunction in the handset
• Malfunction in the controller cable
•
Malfunction in the AF signal transmission circuit
3
is not displayed, and
transmission is not possible.
•
Malfunction in the handset PTT switch
•
Malfunction in the hook detection circuit
• Malfunction in the transmission circuit
4 Reception sensitivity is poor.
•
Antenna damage
•
Break or short circuit of antenna cable
•
Faulty contact in antenna connectors
5
No sound from the speaker even
when squelch is opened without
reception.
•
Malfunction in the speaker
•
Defective SQL control circuit or harness
• Malfunction in the receiver circuit
6
Noise is output from the
speaker, but own ship cannot
receive any calls.
•
Antenna damage
• Break or short circuit in antenna cable
•
Faulty contact in antenna connectors
•
Malfunction in the receiver
7
Turning SQL does not suppress
noise.
•
Malfunction in the SQL control
• Malfunction in the receiver
The following are not faults.
Symptom Possible causes Handling
No response from other station
via radiotelephone or DSC call.
No operator in that station, or
unavailable to respond due to
other duties.
Wait and retry later.
Can do PWR button operations
and adjust the sound and
brightness with the main unit or
the controller, but cannot do
operations with the
radiotelephone.
Operations are limited due to no
access right.
Press to obtain the
access right and after that,
retry the operation.
Cannot obtain the access right
even when pressing on a main
unit or controller with no access
right when there are multiple
controllers connected.
The main unit or another
controller is in use for
communicating or a controller
with higher priority is performing
menu operations.
After operations are
complete on the main unit or
other controller, do the
operations to obtain the
access right.
If the system is left on a screen
other than the status display for a
while, returns to the status
display.
After leaving the specified
period, the inactivity timer would
be activated and returned to the
status display.
Regulated specification by
ITU-R M.493-13.
(Do not leave the equipment
during menu operation.)
The received distress call log
have erased without operating.
Received distress calls are
automatically deleted after 48
hours.
Regulated specification by IMO
A.803(19).
Noise comes out of the portable
radiotelephone when it comes
close to a transceiver display or a
controller.
This is due to the effect of the
slight high frequency noise that
is generated from the lighting
circuit for the transceiver's LCD
or the controller's LCD.
Either turn off the lighting for
the controller screen, or keep
the portable radiotelephone
at least 1 m away.
Note