Marcum Technologies LX-5i User Manual

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Introduction

Thank you for purchasing the MarCum LX-5i multicolor flasher. The LX-5i
incorporates the same cutting edge technology as its predecessor, the LX-5,
but now with the addition of improved viewability provided by the flat screen.
The LX-5i features the latest in sonar technology, featuring a patented
movable zoom that can be set anywhere between the surface and the bottom,
a patent pending TrueColor display, 2500 watts of peak-to-peak power,
patented signal

interference rejection, Superfine Line Technology, and target
separation down to 3/4 inch. Our goal is to set the industry standard for
performance while maintaining the highest level of reliability. Please read this
manual carefully

before using your LX-5i system. Only by reading this manual

can you realize

the maximum benefit from your purchase — enjoy your new

LX-5i sonar

system!

General Description

•

New Flat Screen Design

•

Dual-Beam Transducer—Quickly switch between 20 degree and 8 degree

•

Rugged transport shuttle with extendable transducer arm

•

Padded nylon soft pack offers the ultimate in protection

•

12 level interference rejection

•

Adjustable Zoom

•

Exclusive SuperFine Line feature

•

12 volt 9 amp battery with 3-stage charger

•

2 year warranty

- 2 -

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GETTING STARTED

Ice System Set-Up

Your LX-5i comes virtually ready to fish. Open the front cover of the soft
pack, loosen the knobs and the monitor can now be positioned how you
want it. Once the monitor is positioned, tighten the knobs again to

hold the

monitor in place.

Look behind the monitor and hook up the LX-5i power cord to the battery.
While you are at it , remov e the en tire unit f rom the soft pac k so yo u can
see exac tl y how ev er yt hi ng c onne c ts—this makes it eas ie r down th e road
if you ever need to check c on nec ti ons o r c hange a batte ry o r transd ucer.
Your LX-5i is delivered with a 9 amp battery that is charged, so you can take it
fishing right away. Even

though the battery comes with a charg e on it, due to
storage time or other fa c tors it may not be fu l l y c harged when yo u g et it, so if
you are not going fishing immediately you should hook up the charger to make
sure the battery has a full charge.

To charge the battery, see below. The LX-5i
will oper ate for 12 hours or more on a fully charged battery. If you are going to
be in a situation where you will want to

use your system for more than one day
without recharging, having a second, fully charged battery with you is cheap
insurance that will allow you to get full use out of your system for the duration
of your trip.

Inside the LX-5i deluxe soft case is an electronics shuttle that has compartments
for the battery and the dual beam transducer, as well as a transducer arm. The
adjustable transducer arm allows for maximum flexibility in positioning the LX-5i
around the ice hole, and can even be moved to the other side of the shuttle.

BATTERY CHARGING

Your Marcum system comes with a 3-stage bat tery charger . This style of
charger has proven to be the most effective and easiest to use of all charging
systems ava i l able. Because th i s is a 3-stage charger, there is no danger of
overcharging your battery. When properly c ared for, a sealed lead acid battery
will last for at least a couple of years. Batteries are made to be used, and they
need to be used to make the most of them. The most important thing you can
do is to prom ptly recharg e y o ur battery after each use. Not c harging your
battery immediately after use is the numbe r one thing that leads to battery
failure.

For safety reasons, it is recommended that you place your system on a flat,
hard surf a c e li k e c e m ent or tile when c harging it, away from any flammable
materials. Be sure to disconnect the charger from the wall when not in use,
and avoid leaving your battery hooked up to the charger for extended periods
of time.

W

hen you get home from a trip, put your battery on charge right away and
leave it th ere overnight , or f or around 8-12 hours. Likewise, on the night before
an ice fishing trip put it on the c h arger again , ju s t to m a k e s ur e . A g ai n, there is
no danger of overcharging your battery. We often talk to people who hesitate
to charge their battery after each use for fear that the battery will develop a
“memory” and this will lead to a shortened run time—THIS IS FALSE!!!
ALWAYS CHARGE YOUR BATTERY AFTER EVERY USE!!! Be sure to use

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the charger th at c a m e with your syst em, or a similar on e that is between .5
amp. and 1 amp. Us in g a l arger charg er , l i ke yo u would use on a car, truck,
RV, or boat is likely to cause damage to the battery. There is really no danger
of overcharging your battery with a low amp charger, and most chargers
automatically go into “maintenance mode” once a full charge has been
achieved.

TO CHARGE THE BATTERY:

Your battery has a wiring harness attached to it that has “piggyback” terminals
on it, enabling you to keep the power cord from the unit attached to the battery
at all times, as well as having the wiring harness with receptacle for your
charger at t ached at all ti m e s. T o c harge, simply co u pl e t h e e nd of the charger
with the end of the wiring harness. It is normal for a green light to appear on
the charg er at th is time if the charger is plug ge d into the batt ery only. It is als o
normal for th e l i gh t on the charger to be gr e en if it is just plug ged into the wa l l.
When it is plugged into the wall and battery, you will see a red LED light
appear on the charger. If the light is re d, th e battery is bei n g c harged. Whe n
your battery is fully ch arged, this red l ight should ch ange to green. If it i s ti me
to go fishing and the light has not turned green, go fish and try to allow a
longer ch arging perio d next time.
Batteries are an expendable item, and m ust be replaced periodically. The
batteries that we use are the “Sealed Lead Acid” variety, they are 12 volts, and
range from 7 to 9 amps. The more amps the battery has, the longer it will run
on a full char ge. Your Marcu m ca n be powered off of any battery that is 12
volts, ev en a large automot i v e or de ep cycle batt ery.

I

f you are having difficulty with the charging process, please see the Charger

Troubleshooting section at end of the manual.

If you need to remove the battery, slide the power cord leads from the battery.
Remove the strap that is holding the battery in place and lift the battery out. To
replace the battery, place a new battery of similar s pe c ifications into the
batter y compartment and secure it wit h the Velcro strap and re-connect the
positiv e an d n eg ative termi na l s.

SETTING THE TRANSDUCER FO R ICE FISHING

:
When used in conjunction with the retractable pivoting transducer arm and
rubber stopper, the LX-5i’s transducer will automatically level itself in your ice
hole. To begin operation, take the transducer out of the recessed holder, and
rotate the adjustable ice arm out from inside the shuttle. Extend the transducer
arm, (the cable should already be threaded through it with stopper in place)
and deploy the transducer into the water. We recommend setting your stopper
to have the transducer down the l east amount possible. The LX-5i pu ts out
enough power that in most cases it is not necessary to have your transducer
down more than a few inches below the water line to get a good readin g.
When the ice thickness is over two feet, it may be necessary to have your
transducer set somewhat farther down. Remember--the less transducer cable
you have ou t , the easier it is t o pu l l it out of the water when bringin g i n a f i s h,
or to move to a n ew location. Under no circumstances should you ever have
the ducer b elow the ice—this can lead to the ducer becoming damaged.
It is also im po r tant that you k ee p t h e c ab le near the center of the ice hol e. We
frequently hear from anglers who allowe d their cable to fr e eze into the sid e of
the ice hole. If this should happen to you, make sure the unit is turned off
before attempting to chisel it out. If you accidentally cut the ducer cable, do

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not try to use that ducer again.

MOVING THE DUCER TO A NEW LOCATION

Being mobile is one of the keys to being successful on the ice. Whenever you
move from one spot to another, i t is tem pting to leave y our transducer hanging
on the transducer arm. This is likely to lead to failure of the t ransducer arm,
and can cause damage to the transducer its elf. Always stow the transducer
inside the pack when you are moving. Keeping the amount of transducer cord
you have out at a minimum will make transporting your LX-5i easier. Similarly,
you may need to quickly remove your transducer from the hole when about to
land a fish. We have actually seen anglers in a panic actually grab the shuttle
itself an d to s s the entire unit to the side. This is n o wa y to treat any piece of
electronics; a much better ap proach is to sim ply lift the transducer out of your
way by the co rd, and the shuttle itself can be gently pushed aside. Whenever
you are mo v in g v i a s l ed or ve hicle, alway s fol d up your transd ucer arm, stow
the transducer inside, and close the protective soft pack.

HOW TO INTERP RE T THE DIAL

We receiv e ma ny phone call s from users who ar e ha v ing a hard time
interpreting the different rings of numbers around the dial. When on the 20’
range, simply go by the white numbers on the outside. When on the 40’
range, us e t h e white numbers but multiply x 2 [13 on the dial = 26 feet]. When
on the 80’ range, use the red numbers on the inside of the dial. When on the
160’ range, use the red numbers x 2. The innermost yellow numbers are for
the split scr e en zoom, and they are used in a si m il ar manner.

WHICH CONE ANGLE TO USE

One of the benefits of the LX-5i over our other flashers is the ability to switch
between a standard 20 degree cone angle, and a narrow, more precise 8
degree cone angle. The 20 degree cone angle is suitable for general use, but
here are some situations where you will appreciate the precision of the
narrow beam.

1---Fishing in deep water (over 40’) for walleyes, perch, or lake trout.

When fishing in deep water, the energy of your transducer beam gets spread
out over a wide area, making it difficult

to highlight targets. The narrow beam
focuses the energy in a smaller area, giving you better resolution of targets in
the area below you

2---Fishing along very steep drop-offs for bottom-hugging walleyes.

The
transducer beam will register the highest point of the bottom below you as the
actual bottom, and this creates what we call the “Shadow Effect”, where your
lure and fish can hide in the “shadow”. In 30’ of water with a 20 degree
transducer, your sonar footprint is an approximate 10’ circle on the bottom.
Now, if one edge of that circle is 29’ and the opposite edge is 31’, the
transducer will read the shallowest part first, and 29’ will be displayed as the
bottom. In this situation, when you drop your jig down to the actual bottom,
you would have to raise it up at least a foot before it would show up on your
sonar to escape the shadow. Switching to a narrow beam will minimize the
Shadow Effect. Underwater objects like boulders or standing timber can also
create sonar shadows.

3---Fishing in big schools of fish, like suspended crappies or tullibees.

Imagine you fishing in 30’ of water, and there is a big school of crappies
suspended five to ten feet off the bottom. It’s a huge school, comprised of
hundreds of fish, and at any given time there could be twenty or more fish
hanging in your 20 degree transducer cone, and they are likely to show up on

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your display as one wide band rather than indivi dual lines. By changing to the
narrow 8 de gree cone, the fish on the edge of y o ur ar e a will be elimi na ted
from your display, and it will now become easy to present your jig to individual
fish in the school.

4---Fishing in and around heavy weeds for panfish, like bluegills and
crappies.

Some lakes have thick, lush beds of aquatic plants like milfoil,
coonta il , an d c abbage, and th ese areas are often magnet s for big panfish.
The trouble is, when you deploy a 20 degree transducer in heavy weeds, there
can be overload on your display from all the weeds. Switching to the narrow
beam will reduce how many plants are being picked up, and your jig and fish
can be plainly seen below you.

5---Fishing in a crowd, t he narrow beam will reduce interference from
your neighbo r

. Whenever two or more sonars are operated in proximity to
each oth er, there is the pote ntial for int erference cau s e d by the various
transducer cones “crossing paths”. Switching to narrow beam will keep your
cone right below you, minimizing interference.

READING THROUGH ICE –
The LX-5i will provide accurate information reading through ice
providing the ice is reasonably clear. Wet the ice with at least a cup of
water to improve the coupling of the transducer to the ice. Place the
face of the transducer firmly on the wetted ice, and you will now be
able to see a signal showing the bottom (and even fish if there are any
present!). Drilling into the ice 1-2” before taking a reading may be
necessary if the surface of the ice is very rough, or if the ice is filled
with air bubbles.

Operation

The LX-5i utilizes a combination of control knobs (Gain & Range) and keypad
(IR, ZM, UP & DN, NBT, SFL) to change or activate various system functions.
The keypad has an audible beep when the key is depressed to indicate that
a system function has been activated. The following is an explanation of the
various system functions.

Range Select

- The Range select knob is used for turning the LX-5i on or
off, as well as choosing the correct depth range. The LX-5i offers four depth
ranges to choose from that can be selected by rotating the knob clockwise.
The depth ranges are 20, 40, 80, or 160 feet. The depth-range setting is deter­mined by turning the unit “on” and turning the Gain knob looking for a solid
return (band of light) indicating bottom on the display. If no return is present,
then select the 40-, 80-, or 160-foot range until a bottom reading is displayed
on the screen.

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Gain Knob

- The Gain knob controls the amount of sensitivity required by the

unit to pick up objects like bottom, weeds, fish, or lures

and jigs. The lower the
number, the less sensitivity, conversely higher numbers mean more sensitivity.
However, too much Gain (sensitivity) will result in too

much information being
displayed, and it becomes difficult to interpret the return signals. The best Gain
setting is ac hieved by turning up your Gain from 0 until you receive a clear and
steady bottom reading. If you’re looking for your lure or bait, turn up the gain
until you just begin to display your bait without it

fading or flickering on the
screen. The lower the sensitivity, the narrower the display segments, and
therefore the easier it is to distinguish targets. We cannot emphasize

this
strongly enough. Too much Gain will only clutter the display with unnecessary
information, making it more difficult to interpret the return signals.

Keeping the
Gain at minimum levels will actually provide you with the most accurate and
precise information.

Interference Rejection

- The Interference Rejection system is designed to
knock out competing return signals from other sonar units being used within
close proximity. When other sonar units are causing interference to the display
of the LX-5i, activate the IR feature by depressing the IR key located on the
face of the LX-5i. When you press the key, a beep will be heard. There are 12
levels of interference rejection, and each press of the key will change the level
of Interference Rejection. The correct level of IR will be achieved when the
display is clear of display clutter. In some extreme cases, clutter will be greatly
reduced but not totally eliminated. It is recommended that only one person in
a group adjust the interference rejection at a time.

Zoom

- The Zoom function can be activated by depressing the ZM key. An
audible beep will indicate that the Zoom function has been activated. The
Zoom function divides the circular display screen in half. The right half of the
display, (12 to 6 o’clock on the dial) will become your entire surface-to-bottom
display. This will be indicated by a RED band of light at the top (zero) and a
RED band of light at the bottom (or 6 o’clock). If you are on the 20-foot depth
range, the 12 o’clock position will be the surface of the water and 6 o’clock
will be the bottom of your chosen depth range (20 feet on the 20-foot scale).

When utilizing the Zoom function, you will be reading your depth markings by
viewing the inner circle (YELLOW numeric) located in the center of the LX-5
display dial. If you select the 40-foot scale, the same applies, except you
multiply the YELLOW numeric markings by 2. The 80-foot range se tting is a
multiple of 4, and the 160-foot range setting is a multiple of 8.

Once you use the LX-5i a few times, your brain will automatically make the
adjustment without any noticeable thought process. The backside of the
display (6 o’clock moving clockwise to 12 o’clock) is the other half of your
split-screen display. This half reads what you see on the right half, but in a
magnified version. This will greatly enhance the precision of your presentation
and show that multiple smaller targets might exist on the left half (Zoom)

where

it appears that one larger target is showing on the right (normal display).

You
can determine the size of your Zoom window (the width or amount of water
viewed within the water column) by depressing the ZM key. If you

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depress the key once (turning Zoom ON), the window is 5 feet on the 20­or 40-foot range setting, if you press the ZM key again the Zoom window
is expanded to 10 feet. Depress the ZM key again and the Zoom feature
is turned OFF. When in the 80-foot range, pressing the ZM will give you a
10-foot viewing window, depress ZM again and it will become a 20-foot Zoom
window. The 160-foot range has a 20-foot window, or it becomes 40-foot
when ZM is depressed again.

Up & Down Keys

- The UP/DN keys are used to move your Zoom window
up or down in the water column. When you first depress the DN key, two
YELLOW blinking lights will appear on the LX-5i display. The YELLOW blink­ing LEDs will be 5 feet apart between the 1-foot and 6-foot markings on the
YELLOW scale located on the inner circle of the display dial. If you remove
your finger from the keypad, the blinking YELLOW indicator lights will disap­pear after 2 seconds.

If you hold the DN key, the two blinking lights will remain on and move down
the display (with audible beeping) until you locate them in the area that you
desire. To increase the Zoom window to 10 feet, depress the ZM key (audible
beep) and then depress the DN key, then the blinking YELLOW lights will
appear 10 feet apart on the inner YELLOW numeric scale in the center of the
LX-5i display. You can then locate the Zoom window at the desired viewing
depth. Even th ough your YELLOW indicator lights are no long er blinking, your
Zoom window is still set and in position. To check the location, press either
the UP key or the DN key to activate the visual blinking lights to reacquaint
yourself with the location. The blinking YELLOW lights will assist you in setting
the location and act as a visual reference.

The benefit to the MarCum design is that it allows you to move your Zoom
window between surface and bottom, and in turn, zoom in on any 5- or
10-foot section of water (on the 20-foot depth range). There are many species
of fish that are not bottom huggers that we all enjoy pursuing. Crappies,
sunfish, perch, tullibees, whitefish and trout often suspend anywhere within
the water column. The MarCum design allows you to have two sizes of Zoom
window per depth range and position the Zoom where you need it for the fish
that you enjoy pursuing.

Dual Beam Transducer

- The LX-5i comes standard with a dual beam
transducer that allows the user to choose between a 20- or 8-degree transmit
cone (angle). When the LX-5i is firs t tu rned on, it will be transmitting utilizing
the 20-degree element. To change the cone angle to a nar rower eight degree
transmit, simply depress the NBT key located on the keypad and a RED LED
will light indicating the LX-5i is now transmitting using the 8-degree element.
This option allows the user maximum flexibility by narrowing the “dead zone”
associated with fishing sharp breaks, reducing or eliminating interference from
nearby sonar in hard bottom situations, eliminating viewing other lures or baits
from nearby anglers, or narrowing the cone in deeper waters to view fish in an
area of closer proximity to your bait.

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Cone Angle Coverage

- The cone angle of the LX-5i dual-beam ice trans­ducer is either 8 or 20 degree, and the open water high speed and puck trans­ducers are 20 degrees. The approximate are a of coverage with a 20 degree
transducer is determined by dividing the depth by 3 (in 30 feet of water your
area of coverage is approximately 10’). The approximate area of coverage
with an 8 degree transducer is determined by dividing the depth by 7 (in 30
feet of water your are a of coverage is approximately 4.25’ ).

SuperFine Line

- This feature allows the user to improve target separation
to 3/4 on an inch and still utilize the full screen display. Whe n t h e S FL key is
depressed, a RED LED will light to indicate that the SFL feature has been
activated. Utilizing SuperFine Line changes the transm i t pu l s e, n ar rows the
display segments, and improves the target separation from 2.15 inch to 3/4
of an inch. This is achieved without having to activate the Zoom feature
thereby allowing you to view the entire water column from surface to
bottom.

Simulator

- The LX-5i comes equipped with a built-in simulator. To activate
the simulator, depress and hold the Zoom key while turning on the unit. The
unit will display a simulated bottom reading (RED & GREEN), a fish just off the
bottom (GREEN) and a moving (jigging) lure indicated by a YELLOW light.

The simulated fish (GREEN) will move off the bottom and change to RED as
it approaches the lure. This indicates that the fish was not in the center of the
transmit cone when near the bottom but as it approaches the lure will turn
RED as it enter s th e c e nter of the con e. T h e u nit will beep a s th e s i m ul ated
fish hits the lure and is caught. The unit will then re-start the programmed
simulation and the process will repeat itself indefinitely.

Signal Interpretation

Hard-bottom readings (rock or gravel) will be displayed by a wide band of RED
light indicating a strong return signal. Conversely, a soft bottom (mud or silt)
will return a weaker signal and will result in a narrower RED band or possibly
even a combined RED and GREEN band. A soft bottom with weed growth wil l
often appear as a narrow RED or GREEN band combined with both solid and
broken Yellow segments indicating weeds. Any fish in the weeds may show as
RED or GREEN depending on fish size and relationship within the transmit
beam (in the middle or on the outside of the transmit signal).

Reading Bottom

- In interpreting depth, always read the leading edge (shal­lowest side) of the signal return. If you have a strong signal return (wide band
of RED light) and it starts at 13 feet and ends at 16 feet, the correct depth is
13 feet or the shallowest leading edge of the return signal. Anything beyond
the shallowest leading edge indicates the strength of the return signal.

Reading Fish

- Fish will generally appear as separate targets from the bottom.
A fish target can be displayed as RED, YELLOW, or GREEN, depending on the
size of the fish and the location within the transmit beam. Larger fish located in
the center of the beam (cone) can appear RED and will be displayed as a
wider band on the display. Smaller fish or fish on the outside of the cone may
appear green or even yellow. Fish moving through the transmit beam may
change color as the return signal strengthens or weakens reflecti ng their
location.

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Fish that are right on the bottom can appear as part of the bottom. The best
indication of a fish sitting right on the bottom is that the leading edge of the
bottom return signal is either GREEN or possibly a dithering or flickering RED
segment. It is important that the

GAIN

or sensitivity be kept to a minimum
when displaying a strong bottom return. Too much GAIN will flood out the
ability to differentiate targets and clutter the display.

Reading Your Jig

- The LX-5i will pick up and display small objects like jigs,
spilt shot, or swivels. When tuning the unit to display your lure or bait, lower the
object to the desired depth and turn up the GAIN until you see the jig on the
display. It is important that the GAIN be set so it displays the jig as you raise or
lower it.

Sound waves emitted by the LX-5i bounce off targets and return with the
strength of the targets’ density. Denser targets return with a stronger
signal, displayed as RED. Less-dense objects (small fish) return a
medium-strength signal, displayed as GREEN. The least dense objects
(weeds, bait-fish, lure) return a weak signal, displayed as YELLOW.
Objects on the edge of the sound cone may appear as YELLOW. A fish
moving through the cone may appear first as YELLOW then GREEN,
then RED, depending on its size and how close to the center of the cone
it moves.

Dead Zone -

All sonar units will have a dead zone in certain
circumstances. This occurs on sharp drop-offs where the transmit
beam (cone) hits the shallower edge of the drop-off and returns before
the deeper edge returns. This in effect creates an undisplayed area
between the shallower and deeper water

within the transmit beam.
The 8 degree transmit option on the LX-5i will greatly reduce this
effect.

A typical day on the ice with a Marcum…

Based u pon past exper ie nce, mapping GPS, or tips fr om other angle rs yo u have
selected a general area to fish. Confirm that you are in the proper depth before
drilli n g a hole by pourin g a small amoun t of water on the ice, tu r n in g t h e M ar cum
Flasher to the 20 foot range and then placing the face of the transducer on the
wet ice. At first you get no depth reading, but remember that the water is
possibly over 20 feet deep, so you change to the forty foot range. There it is;
you can see that you are in 22 feet of water, a perfect depth for the panfish you
are targeting today. You can even see what appears to be fish on the dial a
couple feet off the bottom. Time to get out the auger and drill a hole!

Once the hole is drilled an d th e s l us h cleared, pl ace the shuttl e o n t h e ic e nex t to
the hol e, position the ducer arm so it is directly over th e c enter of the hol e, and
position the ducer stopper on the ducer cable so the ducer hangs just below the
surface of the water.

You ha ve determined the depth to be just o ver 20 feet, so you power the unit on
to the 40 foot range. Bait up and all ow your jig to sin k down the hole. Soon yo u
can see the jig’s progress as it sinks towards bottom. The jig’s signal disappears
when it gets to the bottom; you engage your reel and raise the jig up a couple of
feet until you can see it on the display, hovering just above the bottom. Your
small jig shows on the display as a thin line of green and yellow, and you can

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see every movement of your rod tip telegraphed as the jig’s signal moves up and
down. Wait-- now there’s another signal just below your jig! It starts out as
green and yellow, but soon becomes red as it gets ever closer to your jig. You
slow the jigging motion and now the red signal of the fish merges with your jig’s
signal and your feel a tap at the sa me time. You set the hoo k and soon a nice
crappie is on the ice.

That was eas y, let’s try a ga in . Bac k do w n goes the jig, bu t this time let’s see
how this zoom function works. You agai n have the jig posi ti oned a couple fe e t
off the botto m. Yo u press the ZOOM button and the display splits in hal f. You
can still plainly see your jig, but it is shows just above the bottom about in the
middle of the ri ght side of the display. You know that you have to move the
zoom window, so you press the DOWN button and two small yellow lights
appear at the very top of the right side of the display. You hold the DOW N
button, and the lights scrol l down until they get to the bottom. Now you can still
see your jig on the right side, but it is also visible on the left side as well, only on
the left side it is greatly magnified. Your attention is now focused 100 percent on
the Zoom Window, and soon a larger signal is once again closing in on your jig.
The large red signal overtakes your jig, and as soon as you set the hook you can
tell this one is larger tha n t h e fi rst. You slowly pump the fish to th e s u rf ace, but
befor e th e f ish gets to the ic e y ou re ac h do wn with your fre e ha nd and lift the
ducer out of the way. The big crappie fills up the entire hole and you quickly
grab it by the lower lip as soon as its head comes out of the water.

BATTERY CHARGER TROUBLESHOOTING

A majority of inquiries that come to our office are battery or battery
charger related.

Battery fa i lure can be caused by a fault in the charging
system, and many times the issue is with the fuse on the wiring harness . If you
suspect your battery is not being charged, follow these troubleshooting tips:

1.

When the charger is plug ge d into the

WALL ONLY

it should show a green
light. If there is no light showing, confirm that the outlet is good. If the outlet is
good, it is ver y li k ely that the char ger itself is faulty.

2.

If the charger is plugged into the

BATTERY ONLY

it should sho w a green
light. If it does not show a green light, it is likely that the charger is not making
contact with the battery. The most likely reason for this is a faulty fuse on the
wiring harness. This fuse is a 2-amp automotive fuse, and it should be
replace d w ith a 2 or 3-amp fuse available anywhere that sells auto parts. The
fuse can blow out if there is a short in the charging system, or if the plug end
of the wiring harness comes in contact with a battery terminal.

3.

When the ch arger is plugged into both the wall

and

the batter y, there should
be a red light showing on the charger. A red light showing indicates that the
charger is in contact with the battery and is actively charging the battery.
Once the battery has reached a voltage level that is considered “fully charged”
the red light should change to green. If after 24 hours the light has not
changed to green there is no cause for alarm! Remember that when the light
is red, the battery is bei ng c harged, and you wi ll be a bl e to use your system.

4.

If the charger is plugged int o the wall and batte ry, and you get a blinki ng light
on the char ger, it is very li k el y that the batter y i s fa ulty and shoul d be replaced

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Open Water Set-Up

The LX-5i is an excellent sonar unit for open-water use. To convert the LX-5i
from an ice system to an open water unit, remove the LX-5i powerhead,
gimbal bracket and power cord from the softcase. The gimbal bracket can be
mounted on any flat surface. The unit should be mounted in a location that
is free from other electrical apparatus to eliminate interference. If
interference is observed, reposition the unit until optimum performance is
obtained. Your boat’s 12-volt DC electrical system can be used to power the
unit. Lowest noise will be obtained by direct connection to the battery. The
LX-5i is protected from accidental polarity reversals. No damage will result
from an

incorrect battery hook-up.

The ice-fishing transducer supplied with the Ice System is not designed for
open-water use. There are two transducer choices for use in open water. The
high-speed transducer is designed for transom mounting (outside the hull)
and reads depth while the boat is on plane. The puck-style transducer is most
often mounted on the bottom of a trolling motor or epoxied into the hull of a
fiberglass boat.

High-Speed Transducer Installation

High-Speed transducers are designed to be mounted on the transom of a
boat. If properly installed, you will be able to read depth, weeds, and fish while
the boat is on plane. Transducer mounting location is critical for optimum
performance of the LX-5i sonar unit. The mounting location should be free of
any white water or turbulence resulting from rivets, ribs or hull strakes. It is
preferable to mount the transducer at least 18 inches from the centerline of the
boat to avoid turbulent water resulting from the outboard motor. The
transducer is wedge-shaped and should be mounted with the leading edge
mounted against the transom. The leading edge of the transducer should be
mounted flush with bottom of the boat. This can be best achieved by using a
flat object like a ruler and holding it flat along the bottom of the boat and
matching the bottom of the transducer to the bottom of the boat.

Attach the mounting hardware to the high-speed transducer as shown in the
instructions included with the transducer. Hold the transducer, with attached
mounting hardware, to the transom of the boat (flush to the bottom) and mark
the center of the holes on the transom. Drill the appropriate-size holes and
attach the transducer to the transom. Tilt the rear of the transducer between
2 and 5 degrees below the transom to ensure solid contact with the water
when the boat is on plane.

More-detailed installation instructions are included with the high-speed
transducer and mounting hardware. Do not mount the transducer next to the
propeller. Turbulence from the propeller may cause

disruption in the sonar
display. In-hull mounting is designed for achieving high-speed sonar readings
in fiberglass boats.

Puck Transducer Installation

Puck-style transducers can be mounted on the bo ttom of a trolling mo tor,
epoxied in the hull of a fiberglass boat, or mounted to a suction cup for portable
use. Mounting to a troll i ng m otor is achiev ed with the use of a l ar g e, adjustable
stainless steel hose clamp available at most hardware or automotive stores.

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Slots are included in the puck tr ansducer for passing the clamp thr ough and then
around the motor. Alig n t h e tr ansducer so that it is perfec tly centere d from right
to left on the bottom of the motor. If the transducer is tilted or angled, you won’t
receive a signal on your sonar display.

For through-hull mounting, the transducer must be mounted in the layer
of fiberglass that is in direct contact with the water. This is best achieved
by mounting the transducer in the area surrounding the bilge pump in the
transom area of the boat. Some boats have false bottoms or floors.
Mounting the transducer in a location not in direct contact with the water
will result in dead air space and no sonar reading. Once the correct area
is located, the transducer is installed using a good grade of marine
epoxy. For more-detailed install ation information, refer to the directions
included with the puck transducer.

Product Performance Specifications

Battery Draw

- The LX-5i has a current draw between 350 and 400mA per

hour. To extend the ba ttery life, recharge the battery after every use.

Output Power ..................... . 2500 watts peak to peak

Depth Ranges ..................... . 20, 40, 80, & 160 feet

Transmit Frequency ................. . 200 KHz

Current Draw ...................... . 350 mA

Operating Voltage .................. . 10.5 to 15 volts (12-volt DC)

Display Colors ..................... . Red, Yellow, Green

Transducer Cone Angle .............. . Dual Beam (8 & 20 degrees)

Puck and High Speed for open
water use – 20 degree.

Target Separation .................. . 2.15 inches (20-foot dept h s c al e)

3/4 inch in SuperFine Line Mode
(20 foot depth scale)

TWO YEAR WARRANTY

Marcum warrants this product to be free from defects in materials and workmanship for
two years from the date of purchase. This warranty applies to customers who properly
complete the online product registration form found on the MarCum Technologies
Website www.marcumtech.com/support
If you are unable to use the internet, please fill out and submit the enclosed warranty
registration card to be eligible for the two year warranty. Marcum Technologies will
repair or replace any components that fail in normal use. Failures due to abuse, misuse,
unauthorized alteration, modification, or repair are not covered. The battery is not
covered by the warranty. The warranty is valid only for the original owner who
purchases the unit from an authorized dealer.
An original sales receipt dated within the warranty period is required for all warranty
claims.

HOW TO OBTAIN SERVICE

If your unit is malfu nct ioning , ch eck th e FAQ s ection o f our websi te. You m ay f ind that
the solution to your pr ob lem is somethi ng y ou can r es olve yourse l f. If you nee d to send
it in, there is no need to co ntac t our office. Getting repair s made is as s imple as goi ng to
our website, clicking on the ser vice ta b, and then fil ling out the Serv ice Reques t F orm. If
your unit is under warr anty , be sure to at tach a picture/ scan of your rec eipt show ing the

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date of purchase. If your system is out of warranty, we have several flat-rate fees that
will cover the cost of repairs, including parts and labor. Once you have completed the
Warranty or Flat-Rate repair, package the unit as described on the website and ship it
to us.

Ther

e is no need for an au thoriz ati on or reference number, just make sur e that you have

included your contact i nfo and a bri ef desc rip tion of the issu e on a no t e in the box.

If

you do not have the a bi lity to use the Inter net , yo u may also f ill o ut th e servi ce r equest
form included in the box with your unit . I f you enc lose this f orm in the box with your u ni t
there is no need to c ontact our of fic e, just inc lude the fil led out form in the sh ipp ing box .

Some people are more comfortable calling for shipping instructions. During peak ice
season, we sometimes receive a high volume of calls, making it impossible to get to all
customers who phone in. For this reason, strongly consider using the on-line form or
email rather than calling. In your email, please provide your name, complete address,
and cell phone #. Please indicate what model Marcum you have, approximate date of
purchase, and what has gone wrong with it.

Please send your email inquiries to serv

[e-mail]

If you are unable to use email or internet, you may also call us at 763-512-3987.
Our office hours are Monday – Friday, 8 – 4 Central Time.

OUR ADDRESS:

MARCUM TECHNOLOGIES

ATTN: SERVICE DEPT.

3943 QUEBEC AVE NORTH

MINNEAPOLIS, MN 55427

The customer is responsible for shipping costs associated with returning the
unit to Marcum Technologies. Marcum will pay for shipping the repaired unit
back to the customer while it is still under warranty. All out of warranty
services will be charged a fee for service and shipping which must be paid
in advance. The unit should be securely packed and shipped “pre-paid
freight” and insured to Marcum Technologies. It is the customer’s full
responsibility to track their products sent out in the mail or other forms of
delivery service. Marcum Technologies will not be liable for packages lost en
route to us. Unless specified

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otherwise, do not include batteries or other accessories when returning the
product for repair. Marcum Technologies will not be responsible for lost or
damaged accessories. Turnaround time can vary, on average it is about
1 week.

ACCESSORIES

Soft pack

This is the red pack that protects your flasher from the

elements.

Shuttle

This is the plastic base that your flasher is mounted to.

Transducer Arm

This is what holds your ducer cable. Having
an extra one on hand is not a bad idea; clumsy friends have been
known to break these.

Ice Transducer—

If you have lost or damaged your ducer you
can buy one from us or premium retailers. If you think your ducer
quit working, you should contact customer service before buying
a new one.

Stopper—

This suspends your ice ducer in the hole along with the

ducer arm.

12 volt B at tery -

Batteries don’t last forever, buying an extra one
is cheap insurance that you will always be able to use your Digital
Sonar

Power Cord -

This connects your flasher to the battery

Universal Charging System - This includes a charger and a
fused wiring harness

These items can be ordered off our website,
marcumtech.com or by calling 763-512-3987

OTHER GREAT PRODUCTS FROM MARCUM TECHNOLOGIES

LX-7

The LX-7 Digital Sonar takes DNA from other fine Marcum sonars –you might
say it was “bred” for excellence. Because the LX-7 is digital, we can pack it
full of more features than have ever been found in an ice sonar before. With
an 8” customizable dashboard display, superior target separation, 12-level
interference rejection, dual-beam transducer, expandable zoom, and much,
much more, the LX7 is the perfect combination of macro features and micro
precision.

TROLLER 2.0

The new Showdown Troller Digital Fish Finder is a palm-sized sonar device
with full size performance. For use in either ice-fishing or open water situa­tions…quickly “troll” from hole to hole while ice-fishing or shoot through your
canoe or kayak in order to find fish and the correct depth. As a scouting tool
it has ne equal; the ultimate in portability is matched to ShowDown’s proven
Crystal-Quick® vertical display. The sonar instantly locks on to bottom, and
clearly displays the location of fish and your lure, anywhere in the water
column.

VS825SD

An 8” LCD display will deliver the sharpest, most vivid display possible. On­Screen displays of Camera

Direction, Depth, Temp and Battery Voltage take all
of the guess work out of your camera position so your new VS825sd can be
used to observe fish in their natural habitat or learn how fish react to your lure
or bait presentation. The applications are

endless, and it’s never been easier or

more fun to view.

www.marcumtech.com

MARCUM TECHNOLOGIES
3943 QUEBEC AVE NORTH

MINNEAPOLIS, MN 55427

MarCum User Manuals are available for download from

www.marcumtech.com.