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Magna II
and
Magna II Plus
INSTALLATION AND OPERATION
INSTRUCTIONS
LITHO IN U.S.A. |
988-0106-56 |
EAGI |
1TM |
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TABLE OFCONTENTS |
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INTRODUCTION |
1 |
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INSTALLATION |
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1 |
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POWER CONNECTIONS |
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2 |
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SPEEDTrEMPERATURE SENSOR |
3 |
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KEYBOARD BASICS |
4 |
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DISPLAY |
5 |
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MENUS |
5 |
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OPERATION |
6 |
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AUTOMATIC |
6 |
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RANGE |
6 |
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ZOOM-Automatic Operation |
7 |
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ZOOM- Manuai Operation |
8 |
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SENSmVITY |
9 |
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GRAYLINE® |
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FISH ID |
10 |
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CHARTSPEED |
11 |
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DISPLAY MODE |
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12 |
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ALARMS |
14 |
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FISHALARM |
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14 |
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DEPTHALARM |
15 |
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LAMP |
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16 |
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FEET/METER |
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16 |
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DISPLAY CONTRAST |
16 |
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ASP (Advanced Signal Processing) |
17 |
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SIDESCAN |
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SIDESCAN-RANGE |
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SIDESCAN-ALARM |
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19 |
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MENU SUMMARY |
19 |
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TRANSDUCERS AND CONE ANGLES |
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20 |
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SIGNALINTERPRETATION |
21 |
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FISHARCHES |
22 |
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WATER TEMPERATURE ANDTHERMOCUNES |
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23 |
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SURVEYINGALAKE |
25 |
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BAITFISH |
25 |
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SONAR TROUBLESHOOTING |
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Copyright © 1991, 1990 Eagle Electronics
All rights reserved.
All featuresand specifications subjectto Changewithoutnotice.
All screens in this manual aresimulated.
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4. Theboatmustbemoving ataslowtrollingspeedtoseefisharches. litheboat ismotionless, fishstayInthe cone,showingonthe displayasstraighthorizontal
lines.
ELECTRICAL NOISE
Amajorcauseofsonarproblems iselectricalnoise. This usually appearsonthe sonar'sdisplayas randompatternsof dots or lines. In severe cases, it can
coverthescreen withblackdots,orcause theunit operateerraticly, completely
or not atall.
To eliminate or minimize the effectsofelectrical noise, firsttryto determinethe cause. Withtheboat at restin the water,thefirstthing you shoulddo isturn all
electrical |
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onthe boatoff. Makecertain theengine is off, also. Turn |
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equipment |
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Thereshould |
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on, |
then turn offASP |
(AdvancedSignal |
Processing). |
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yourMagna |
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be a steadybottom signal onthe display. Nowturn on each piece ofelectrical |
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equipment onthe boatandview |
theeffect on the sonar's |
For |
example, |
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display. |
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turnon thebilgepump andviewthesonardisplayfornoise. If nonoise ispresent, |
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turn the |
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off,thenturnontheVHFradioandtransmit. Keepdoingthis until |
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pump
all electrical equipment has been turned on, their effect on the sonar display noted, thenturnedoff.
Ifyou findnoiseinterference froman electricalinstrument, trollingmotor,pump,
or radio, try to isolate the problem. You can usuallyre-route the sonarunit's
power cable and transducercable awayfrom the wiringthat Is causingthe interference. VHFradioantennacablesradiatenoisewhentransmitting, so be
certaintokeepthe sonar'swiresawayfromit. Youmayneedtoroutethesonar unit'spowercable directlytothe batterytoIsolate itfromotherwiringontheboat.
If no noise displayson the sonar unit from electrical equipment, then make exceptthe sonar unit is turned off, then stall the engine.
Increasethe RPMwiththe gearshiftin neutral. If noise appears on thedisplay, the problem couldbeoneofthreethings;sparkplugs, alternator, ortachometer wiring. Tryusing resistorsparkplugs, alternatorfliters, orroutingthesonarunit's
powercable awayfromenginewiring. Again,routingthe powercabledirectlyto
the batteryhelps eliminatenoiseproblems. Makecertain tousethein-line fuse supplied withtheunitwhenwiringthepowercabletothe battery.
When no noise appears on the sonarunit afterall ofthe above tests, then the noise source is probably cavitation. Many novices or persons with limited
experience makehasty sonar installations which functionperfectly
water, orwhentheboatisatrest. Innearlyallcases, thecause ofthemalfunction will bethe location and/orangleofthe transducer. Theface ofthe transducer
mustbeplacedin alocation that hasasmoothflowofwateratallboatspeeds. Readyourtransducerowners manualforthe best mounting position.
INTRODUCTION
Thankyouforpurchasing anEaglesonar.YourMagnaIIorMagnaIIPlus is a highquality sonardesigned forboth professional and novice fisher- men. Theseunitshaveanautomatic featurethatfinds anddisplaysthe
bottom, fish,structure, and more! Allyou havetodoispresstheonkey. However, ifyouwishtofine tunetheunit, allyou havetodo is press the menu key. The Magnaserieshas powerful features available through
easy-to-use menus.
TogetstartedwithyourEagle unit,first readtheinstallationsection.This
iswhereitallbegins. Improperinstallation cancauseproblems downthe |
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road. |
After |
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readtheinstructions, installtheunit,then readtherest |
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you've |
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of the manual. The more you know about your unit, the better it will |
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for |
you. |
Take |
this manual forreferencewhen |
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head forthe |
perform |
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water.
INSTALLATION
MounttheMagna IIinanyconvenient location, providedthereisclearance whenit'stiltedforthebestviewingangle. Holesinthebracket'sbaseallow
woodscrewor throughbolt mounting. It may be necessary to place a
pieceofplywood onthe back sideofthin panelsto reinforce the panel. Makecertainthereisenoughroom behindtheunittoattachthepowerand
transducer cables.
Drill a hole in the dashforthe powerand transducercables. The best locationforthishole isimmediately underthegimbalbracket.This way, the bracket covers the hole. The smallest hole both the power and
transducer cables |
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passthrough |
isoneinch. However, |
you |
can't |
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pass |
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and another cable |
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a one inch |
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a poweror transducer connector |
through |
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hole. Therefore,afterdrilling thehole, passthetransducer connectorup
throughthehole fromunderthedash. Thendropthepowercabledown fromthefrontsideofthedash. Slidethebracket overthehole,then route
the transducerand powercables out the slots in the bracket. Finally, fastenthe brackettothedash.
POWERCONNECTIONS
TheMagnaIIworksfroma12volt DC system only. Forthebestresults, |
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wnthe |
power |
cable |
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tothe boat's |
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directly |
battery. Keep thepowercable |
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awayfromotherboat |
wiring, especially |
the |
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wires. |
This willgive |
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engine's |
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the best isolation from electrical noise. |
Ifthe |
cable is not |
long |
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supplied |
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enoughtoreachthebattery, splice#18gaugeinsulatedwire toit. Youcan
attach thepowercabletoanaccessoryorpowerbuss, however, you may have problems with electrical interference. See page 28 for more information on electrical noise.
MAGNA II
BLAcK |
3amp |
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FUSE |
12 VOLT
BATrERY
MACNA II |
3amp |
PLUS |
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FUSE |
Weak bottomecho, digital readings erratic,or nofish signals (cont.):
2. Electrical noisefromtheboat'smotorcaninterfere withthesonar. Thiscauses
the sonartoautomaticallyincrease itsDiscrimination or noise rejection feature.
Thiscancausetheunit toeliminateweakersignalssuchasfishorevenstructure fromthe display.
3. Thewater maybedeeperthan the sonar'sability tofindthe bottom. Ifthe sonarcan'tfindthe bottomsignalwhileit'sin the automatic mode, the digitalwill
flashcontinuously.Itmay changethe range tolimits fargreaterthan the water you are in. Ifthis happens,placethe unitin the manualmode, then changethe range toarealisticone,(forexample, 0-100 feet)and increase thesensitivity.As
you moveintoshallowerwater,abottomsignalshould appear.
4. Checkthe batteryvoltage. Ifthe voltage drops,the unit'stransmitterpower alsodrops, reducing its ability to findthe bottom or targets.
Bottom echo disappears athighspeeds or erratic digitalreading or weak bottom echo whileboatIs moving
1. Thetransducer |
be in turbulentwater, Itmust be |
mounted in asmooth |
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may |
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flow ofwaterin orderforthe sonartoworkatallboat |
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Airbubblesin the |
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waterdisruptthesonarsignals, |
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with its |
speeds. |
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interfering |
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to findthe bottomor |
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ability |
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othertargets. Thetechnicaltermforthis is 'Cavitation'.
2. Electrical noisefromtheboat'smotorcaninterfere withthesonar. Thiscauses
thesonarto |
increaseits |
Discrimination or noise re]ection feature. |
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automatically |
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Thiscan cause the unittoeliminate |
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suchasfishorevenstructure |
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weakersignals |
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fromthedisplay. Try using resistorsparkplugsor routingthesonarunitspower andtransducercablesawayfromother electrical wiring onthe boat.
No fish arches when the Fish IDfeature Isoff:
1. Makecertain transduceris pointingstraightdown. This isthe most common problemifapartialarch isdisplayed. Seethe FishArch sectionin yourowners manual formore information.
2. Thesensitivitymay not be highenough. Inorderforthe unit todisplayafish arch,ithas tobe ableto receive the fish'secho fromthe time itenters the cone
untilitleaves. ftthe sensitivityis nothighenough,the unitdisplaysthefish only when it is in the center ofthe cone.
3. Usethe Zoom feature, Itismucheasiertodisplayfisharches whenzoomed
in onasmallrange ofwaterthan a largeone. Forexample, you will havemuch betterluckseeingfish arches witha30to60footrange thana0to60foot range.
Thisenlarges thetargets, allowingthe displaytoshowmuch more detail.
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IMPORTANT
SERVICE INFORMATION!
Ifyourunitisnotworking,or ifyou need technical help, pleaseusethe following troubleshooting sectionbeforecontactinga servicecenteror the factorycus-
tomerservicedepartment. Itmaysaveyouthetroubleofreturning yourunit. See the HowTo Obtain Service sectionon page29 ifyou needservice.
SONAR TROUBLESHOOTING
Unitwon'tturnon:
1.Checkthe powercable'sconnection atthe unit. Also checkthe wiring.
2.Make certain the powercableiswired properly. The red wireconnects tothe positive batteryterminal,blackto negativeor ground.
3.Check the fuse.
4. Measure the |
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attheunit's |
Itshouldbeatleast |
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11 volts. ifit |
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batteryvoltage |
powerconnector. |
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tothe unitis |
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terminals |
orwiring |
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isn't, |
wiring |
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defective,thebattery |
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onthe terminals are corroded,or the batteryneeds charging. |
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Unitfreezes,locksup, or operates erratically: |
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1. Electrical noisefromthe boat's |
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motor, oran |
accessorymay |
be |
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motor, trolling |
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interfering withthesonarunit. Re-routing the powerandtransducercablesaway
fromother electrical wiringontheboat may help. |
Route thesonarunit's |
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power |
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cable |
tothe |
battery |
insteadofthroughafuse blockor ignitionswitch |
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directly |
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2. Inspect the transducercableforbreaks,cuts,or pinchedwires.
3. Check boththe transducerand powerconnectors. Makecertainboth are securelyplugged in tothe unit.
Weakbottomecho, digitalreadingserratic,or nofishsIgnals:
1. Makecertain transduceris pointingstraightdown. Clean the lace of the transducer. Oil, dirt,andfuelcancauseafilmtoformonthetransducer, reducing
its effectiveness. If the transducerIs mounted insidethe hull, be sure it is
shooting through onlyonelayeroffiberglass andthat itissecurelybondedtothe hull. Do NOTuse RNsilicone rubberadhesive or Marinetexm.
Theseunitshavereversepolarity protection. Nodamagewilloccurifthe powerwires are reversed. However, theunitwill notworkuntilthewires
areaftached correctly.
SPEED/TEMPERATURE SENSOR INSTALLATION-
Magna II Plus Only
Mountthespeed/temp sensor onthe boat'stransomina location where the flow of water is the smoothest. There should be a minimum of
turbulenceand airbubblesinthe chosen location. Theport (left)sideof thetransomispreferred, however, thestarboard (right) sidecan beused
ifnecessary. Do notmountthespeed sensorbehindstrakes, ribs, orthru- hull fittings. Thesewill disturb theflow ofwatertothespeedsensor. In
a typicalinstallation, the speedsensor is mounted sixtotwelve inches fromthecenterline ofthehull. Thesensormustalwaysbe in thewaterto
Makecertain thechosenlocationis in thewatereven at high speed or whenthe boat is on plane.
Onceyoudeterminetheproper location,placethesensoronthetransom. Makecertainthesensor'sbottom isflushwiththebottomofthehull. Mark
thetransomin fourplaces, two in each slot. Drilla 5/32"mounting hole ateachlocation. Mount thesensortothehuH withfour#10stainless steel
screws. Use agood grade of caulkingcompoundto seal the screws. Adjustthesensorso itisflushwith thebottomofthe hull andtightenthe
screws.
Ifthebaseofthetransomhasa radius, fill thegapbetween thetransom and thesensorwith caulking compound. This will help insure asmooth waterflow.
Routethesensorcabletothein-line connectorontheMagnaPlus' power
cable. The speed/temp sensoris now readyforuse.
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