Simrad EQ33, Руководство пользователя

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Chapter 9-14 EQ33 Installation and service
9.9 Troubleshooting
For all fault finding, first check that the supply voltage is between 10-32 VDC
Symptom Check Remedy
No picture on display
screen Check that the unit is
turned on Press the [PWR] key on
keypad
Check fuse in power cable
fuse holder Replace fuse. Use only
type 4.0A slow
Picture appears on the
display screen, but image
is too dark or too bright Press [PWR], adjust light/
contrast, press [ENT]
No normal picture or key
operation Turn unit off and on again
Disconnect power and
connect power again
Return to factory presets,
see section 7.7
Echo picture appears
normal, but no target are
shown or only random
“noise” is seen Check that the correct
transducer frequency is
selected Go to Echosounder setup
and select transducer
frequency
Check that the transducer
connectors are securely
mated with the unit Correctly mate the con-
nectors to the unit
Check that the receiver
gain is set high enough Increase the receiver gain
in 5.9 Presentation setup
Check that the range is
correct for the water depth Adjust the range in 5.9
Presentation setup
Excessive noise in echo
picture Check for correct ground-
ing Connected equip-
ment must be properly
grounded to the main unit
All data is deleted after
turning off the unit and
turning it back on Check battery lifetime.
Expected lifetime is min.
5 years Internal battery must be
replaced by authorized
dealer