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6. MAINTENANCE, TROUBLESHOOTING
6-2
6.2 Replacement of Fuse
The 2A fuse in the power cable protects the equipment from equipment fault and
reverse polarity of the ship’s mains. If the fuse blows find the cause before
replacing it. If it blows again after replacement, contact your dealer for advice.
Use the proper fuse.
Use of a wrong fuse may cause
serious damage to the equipment
and void the warranty.
CAUTION
6.3 Troubleshooting
This section provides simple troubleshooting that the user may follow to restore
normal operation.
Troubleshooting
Trouble Problem Remedy
NavNet display unit
freezes
• Jumbled memory
• Turn the NavNet display unit
off and on again.
Command from
NavNet display unit
not accepted
• Network not connected • Reselect the FAX mode.
Cannot read
characters
• Corrupted memory • Clear memory.
Noise but no signal • Loosened antenna
connector
• Coaxial cable in antenna
cable is shorted or
damaged.
• Fasten antenna connector.
• Replace antenna cable.
Multiple or overlapped
image
• Wrong speed setting • Set correct speed. Speed
may be adjusted when
manually receiving an
image.
Image is split. • Image is out of phase. • Set phase manually.
Image is shrunk (or
enlarged) vertically.
• Wrong IOC • Change IOC. IOC may be
adjusted when manually
receiving an image.
Image is filled with
noise.
• Noise • Use the noise rejector to
remove noise.
Timer schedule does
not start as
scheduled.
• Improper setting of
schedule
• Review schedule.
Cannot access
FAX-30 from PC.
• Incorrect IP address or
subnet mask set on PC.
• Check setting referring to
page 7-8.