For all fault finding, first check that the supply voltage is between 10-32 Vdc.
3YMPTON #HECK 2EMEDY
No picture on display
screen.
Check that the unit is
turned on.
Press [PWR] key on
keypad.
Check fuse in power cable.
F See warning below.
Replace fuse. Use only
type 2 AmpF.
Picture appears on the dis-
play screen, but image is
too dark or too bright.
Adjust the image as desired
by pressing the [PWR] key,
adjust light/contrast, and
press the [MENU] key.
No GPS position update. Check external position to
be OFF, refer to interface
display in [MENU],[6],[2].
Replace antenna or cable.
Check antenna and cable. Replace antenna or cable.
No normal operation or po-
sition update.
Turn unit off, and on again.
Perform master reset, refer
to section 7.3.
Echo picture appears nor-
mal, but no targets are
shown or only random
’noise’ is seen.
Check that the transducer
connector is securely mated
with the unit.
Correctly mate the
connector to the unit.
Check that the receiver
gain is set high enough.
Increase the receiver gain,
refer to section 5.2.6.
Check that the range is
correct for the water depth.
Adjust the range, refer to
section 5.2.6.
Check that the Demo mode
is not active.
Go to ’Echosounder setup’
and set Demo mode OFF,
refer to section 5.2.7.
You can not make the sys-
tem switch between 50 kHz
and 200 kHz.
Check that the Demo mode
is not active.
Go to ’Echosounder setup’
and set Demo mode OFF,
refer to section 5.2.7.
Warning! Do not operate the unit without a fuse. When replacing the fuse,
make sure to use the same type of fuse again (2 AmpF), as any other type
may cause severe damage to the unit.
4ROUBLESHOOTINGPROCEDURE
#HAPTER #%-+)))NSTALLATIONANDSERVICE
102
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