Furuno 1942 - Manual (Page 34)

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5.3 Troubleshooting
Table 5-2 contains simple troubleshooting pro-
cedures which you can follow to try to restore
normal operation. If you cannot restore normal
operation, do not attempt to check inside any
unit of the radar system. Any repair work is best
left to a qualified technician.
Table 5-2 Troubleshooting table
If... But... Then...
you pressed the
[POWER] key to
turn on the radar the control panel
does not light • try adjusting the control panel back-
lighting on the OTHERS menu.
• battery may have discharged.
• check fuse in power cable.
nothing appears on
the display or display
contrast is poor • try adjusting the brilliance.
characters are
distorted • request service.
the radar has
warmed up and you
pressed the
[STBY TX] key to
transmit the antenna does not
rotate • the problem may be in antenna unit.
Request service.
characters and
indications are
abnormal • have a qualified technician check the
set.
you have adjusted
the gain with A/C
RAIN and A/C SEA
off neither noise nor
targets appear
(indications and
markers do) • check signal cable for damage.
neither indications nor
markers appear
(noise and targets do) • check signal cable for damage.
the sweep (radial line
sweeping around the
display) is not
synchronized with
antenna rotation • the problem may be in the antenna
unit. Request service.
there is no change in
sensitivity • request service.
a key is pressed nothing happens • key may be faulty. Request service.