p Magna II and Magna II Plus INSTALLATION AND OPERATION INSTRUCTIONS LITHO IN U.S.A. 988-0106-56 EAGI 1TM PDF compression, OCR, web-optimization with CVISION's PdfCompressor INTRODUCTION INSTALLATION POWER CONNECTIONS SPEEDTrEMPERATURE SENSOR KEYBOARD BASICS DISPLAY MENUS OPERATION AUTOMATIC RANGE ZOOM- Automatic Operation ZOOM- Manuai Operation SENSmVITY GRAYLINE® FISH ID CHARTSPEED DISPLAY MODE ALARMS FISHALARM DEPTHALARM LAMP FEET/METER DISPLAY CONTRAST ASP (Advanced Signal Processing) SIDESCAN SIDESCAN RANGE . TABLE OF CONTENTS Copyright © 1991, 1990 Eagle Electronics All rights reserved. 1 1 2 3 4 5 5 6 6 6 7 8 9 10 11 12 14 14 15 16 16 16 17 - Is 18 19 19 20 21 SIDESCAN-ALARM MENU SUMMARY TRANSDUCERS AND CONE ANGLES SIGNALINTERPRETATION FISHARCHES WATER TEMPERATURE ANDTHERMOCUNES SURVEYINGALAKE BAITFISH SONAR TROUBLESHOOTING 22 23 25 25 26 All featuresand specifications subjectto Changewithout notice. All screens in this manual are simulated. PDF compression, OCR, web-optimization with CVISION's PdfCompressor 4. Theboat must be moving ataslowtrollingspeedto seefisharches. lithe boat is motionless, fish stay In the cone,showingon the displayas straighthorizontal lines. INTRODUCTION ELECTRICAL NOISE Amajorcauseofsonarproblems iselectricalnoise. This usually appearsonthe sonar's display as randompatterns of dots or lines. In severe cases, it can coverthe screen withblack dots, orcause the unit operateerraticly, completely or not at all. the To eliminate or minimize the effects of electrical noise, first tryto determine cause. Withtheboat at rest in the water,thefirstthing you shoulddo is turn all electrical equipmenton the boat off. Make certain the engine is off, also. Turn yourMagnaon, then turn off ASP(AdvancedSignal Processing). There should be a steadybottom signal on the display. Now turn on each piece of electrical Forexample, equipment onthe boat and view theeffect on the sonar'sdisplay. noise. If no noise is present, turn on thebilgepump andviewthesonardisplayfor turn the pumpoff,then turn onthe VHFradioand transmit. Keepdoingthis until all electrical equipment has been turned on, their effect on the sonar display noted, then turned off. Thankyouforpurchasing an Eaglesonar. Your MagnaII or MagnaII Plus is a highquality sonar designed forboth professional and novice fishermen. These unitshave an automatic feature that finds and displaysthe bottom, fish, structure, and more! All you haveto do is pressthe on key. However, if youwish to fine tune the unit, allyou haveto do is press the menu key. The Magna series has powerful features available through easy-to-use menus. To getstartedwith your Eagle unit,first readtheinstallationsection. This is whereit all begins. Improperinstallation cancause problems downthe road. Afteryou'vereadtheinstructions, installtheunit,then readtherest of the manual. The more you know about your unit, the better it will performfor you. Take this manual for referencewhen you head for the water. INSTALLATION is MounttheMagna IIin anyconvenient location, providedthere clearance whenit'stiltedforthe bestviewingangle. Holesinthebracket's baseallow wood screwor through bolt mounting. It may be necessary to place a piece of plywood on the back side of thin panelsto reinforce the panel. Makecertain thereis enoughroom behind theunitto attachthepowerand transducer cables. Ifyou find noiseinterference from an electricalinstrument, trolling motor,pump, or radio, try to isolate the problem. You can usually re-route the sonar unit's certainto keepthe sonar'swires awayfrom it. Youmayneedto routethe sonar unit'spowercable directlytothe batteryto Isolate itfromotherwiringontheboat. that Is causing the power cable and transducercable away from the wiring cablesradiatenoisewhentransmitting, so be interference. VHFradio antenna If no noise displays on the sonar unit from electrical equipment, then make certain everything except the sonar unit is turned off, then stall the engine. Increase the RPMwiththe gearshiftin neutral. If noise appears on the display, the problem couldbe one of threethings;spark plugs, alternator, ortachometer liters, orrouting thesonarunit's wiring. Try using resistorsparkplugs, alternatorf cable awayfromenginewiring. Again,routingthe powercabledirectlyto power the batteryhelps eliminatenoiseproblems. Makecertain to usethe in-line fuse the battery. supplied withthe unit whenwiringthe power cableto When no noise appears on the sonar unit after all ofthe above tests, then the noise source is probably cavitation. Many novices or persons with limited in shallow experience make hasty sonar installations which function perfectly In nearlyallcases, thecause ofthemalfunction water, orwhentheboat is atrest. will be the location and/orangle of the transducer. The face of the transducer must be placedin a location that has a smoothflowof water at all boat speeds. Readyourtransducerowners manualforthe best mounting position. Drill a hole in the dash for the power and transducercables. The best locationfor this hole is immediately underthegimbal bracket. This way, the bracket covers the hole. The smallest hole both the power and transducer cables canpassthrough isone inch. However, you can'tpass a poweror transducer connectorand another cablethrough a one inch 1 PDF compression, OCR, web-optimization with CVISION's PdfCompressor 28 throughthehole from underthedash. Thendropthepowercabledown fromthefrontside ofthedash. Slidethebracket overthehole,then route the transducerand power cables out the slots in the bracket. Finally, fastenthe bracketto thedash. POWER CONNECTIONS The Magna II worksfrom a 12 volt DC system only. Forthebestresults, wnthe powercable directlyto the boat'sbattery. Keep thepowercable awayfromother boat wiring, especially theengine's wires. This will give the best isolation from electrical noise. If thesuppliedcable is not long enoughtoreachthebattery, splice #18 gaugeinsulated wire to it. You can attach thepowercableto an accessory powerbuss, however, you may or have problems with electrical interference. See page 28 for more information on electrical noise. hole. Therefore,afterdrilling the hole, passthe transducer connector up Weak bottomecho, digital readings erratic,or no fish signals (cont.): 2. Electrical noisefromtheboat'smotorcaninterfere withthesonar. Thiscauses the sonarto automatically increase its Discrimination or noise rejection feature. Thiscancausethe unit toeliminate suchasfishoreven structure weakersignals from the display. 3. The water maybe deeperthan the sonar's ability to findthe bottom. If the sonarcan'tfindthe bottomsignalwhileit's in the automatic mode, the digitalwill flashcontinuously. It may changethe range to limits fargreaterthan the water you are in. Ifthis happens,placethe unit in the manualmode, then changethe one, (forexample, 0-100 feet) and increase thesensitivity.As range to a realistic you move into shallowerwater, a bottom signalshould appear. 4. Checkthe batteryvoltage. Ifthe voltage drops,the unit'stransmitter power also drops, reducing its ability to find the bottom or targets. Bottom echo disappears at highspeeds or erratic digitalreading or weak bottom echo whileboat Is moving 1. The transducermay be in turbulentwater, It must be mounted in a smooth flow ofwater in orderforthe sonarto workat all boatspeeds. Airbubblesin the water disruptthe sonar signals, interfering with its abilityto find the bottom or othertargets. The technicalterm forthis is 'Cavitation'. MAGNA II BLAcK 3amp FUSE 2. Electrical noisefromtheboat'smotorcaninterfere withthesonar. Thiscauses the sonarto automatically increaseits Discrimination or noise re]ection feature. Thiscan cause the unit to eliminate weakersignals suchasfish oreven structure fromthe display. Try using resistorsparkplugsor routing thesonarunitspower and transducercablesaway from other electrical wiring on the boat. No fish arches when the Fish ID feature Is off: 1. Makecertain transduceris pointingstraightdown. This is the most common problemif a partialarch is displayed. Seethe FishArch sectionin your owners manual formore information. 2. The sensitivitymay not be highenough. In orderforthe unit to displaya fish arch, it has to be ableto receive the fish's echo from the time it enters the cone until it leaves. ftthe sensitivityis nothighenough,the unitdisplaysthefish only when it is in the center of the cone. 3. Usethe Zoom feature, It is much easierto displayfish arches whenzoomed in on asmall range ofwaterthan a largeone. Forexample, you will have much betterluckseeingfish arches witha30 to 60foot range thana 0to 60foot range. Thisenlarges the targets, allowingthe displayto show much more detail. 12 VOLT BATrERY MACNA II PLUS 3 amp FUSE 2 PDF compression, OCR, web-optimization with CVISION's PdfCompressor 27 IMPORTANT SERVICE INFORMATION! If yourunit is notworking,or if you need technical help, pleaseusethe following troubleshooting section before contactinga service centeror the factory customerservice department. Itmaysaveyouthetroubleofreturning yourunit. See the HowTo Obtain Service section on page 29 if you needservice. SONAR TROUBLESHOOTING Theseunitshavereversepolarity protection. No damagewill occurif the powerwires are reversed. However, theunitwill not work until the wires are aftached correctly. SPEED/TEMPERATURE SENSOR INSTALLATION- Magna II Plus Only Mountthespeed/temp sensor on the boat's transomin a location where the flow of water is the smoothest. There should be a minimum of turbulenceand air bubblesin the chosen location. The port (left)side of thetransomis preferred, however, thestarboard (right) side can be used ifnecessary. Do notmountthe speed sensorbehindstrakes, ribs, orthruhull fittings. Thesewill disturb the flow of waterto the speed sensor. In a typical installation, the speed sensor is mounted six to twelve inches fromthecenterline ofthehull. The sensormustalwaysbe in thewaterto function properly. Makecertain the chosen locationis in the water even at high speed or whenthe boat is on plane. Onceyoudeterminetheproper location, placethesensoronthetransom. Makecertain thesensor's bottom is flushwith the bottomofthehull. Mark the transomin four places, two in each slot. Drill a 5/32" mounting hole at eachlocation. Mount thesensortothe huH withfour#10 stainless steel screws. Use a good grade of caulking compoundto seal the screws. Adjustthesensorso it is flush with the bottom of the hull and tightenthe screws. Unitwon't turnon: 1. Checkthe powercable'sconnection at the unit. Also checkthe wiring. 2. Make certain the power cableis wired properly. The red wire connects to the positive batteryterminal, blackto negativeor ground. 3. Check the fuse. 4. Measure thebatteryvoltageatthe unit'spowerconnector.Itshouldbe atleast 11 volts. ifit isn't, the wiring tothe unit isdefective,thebatteryterminals orwiring on the terminals are corroded,or the battery needs charging. Unit freezes, locks up, or operates erratically: cablesaway interfering withthesonarunit. Re-routing the powerandtransducer from other electrical wiringon the boat may help. Route the sonarunit's power cabledirectlytothe battery insteadof througha fuse blockor ignition switch 2. Inspect the transducercablefor breaks,cuts,or pinchedwires. 3. Check both the transducerand power connectors. Make certain both are securelyplugged in to the unit. Weak bottomecho, digitalreadingserratic, or no fish sIgnals: 1. Make certain transducer is pointingstraightdown. Clean the lace of the transducer. Oil, dirt, andfuelcancauseafilmtoformonthetransducer, reducing its effectiveness. If the transducer Is mounted inside the hull, be sure it is shooting through only one layer of fiberglass andthat it issecurelybondedtothe hull. Do NOT use RN silicone rubberadhesive or Marinetexm. 26 1. Electrical noisefromthe boat's motor, trolling motor, oran accessorymaybe If the base of the transomhasa radius, fill thegap between thetransom and the sensorwith caulking compound. This will help insure a smooth waterflow. on Route the sensor cabletothe in-line connector theMagnaPlus' power cable. The speed/temp sensoris now ready for use. 3 PDF compression, OCR, web-optimization with CVISION's PdfCompressor KEYBOARDBASICS The unit sounds a tone when you press anykey. Thistells youthe unit has accepted a command. ON/CLEAR SURVEYING A LAKE Use this keyto turn the unit on. It also clears menu selections and the menus from the screen. OFF The most successful anglers on any body of waterare those who fish it day after day and year after year. Eventually, they learn the hot spots that produce fish consistently. They discoverthrough experience where, and at what depth, they can expect to find the fish they want at any season. And they realizethat these productive areas change throughout theyear depending on waterlevel, temperature, food, and otherfactors. With the Magna II, anyonecan eliminateguesswork and concentrate on thear ...