Summary of Contents for LRG-1510C

Page 1: ... U S A 988 0055 08 INSTALLATION AND OPERATION MANUAL MODEL LRG 1510C GRAYLINE RECORDER LOWRANCE ELECTRONICS INC 12000 F SKELLY DR TULSA OKLA 74128 PDF compression OCR web optimization with CVISION s PdfCompressor ...

Page 2: ...tomer Service Department in Tulsa OK Toll free 1 800 331 3889 Pleasedetailthe problem youare experiencing OurServiceDepart ment maybeableto saveyouthe inconvenienceofreturning yourunit Ifitisdetermined thatyourunitmust be returned full shipping instruc tions will be provided SCHEMATIC DIAGRAM AND PARTS LIST Should youdesire aSchematic Diagram and Parts listforyourLow ranceTRUELINE RECORDER send 1 ...

Page 3: ...o Read Graphs PaperLoading Stylus Replacement Stylus BeltReplacement Maintenance Do s and Don ts Trouble Shooting Specifications p How to Obtain Service 2 3 4 6 7 7 7 8 8 9 10 13 19 20 22 23 23 24 25 24 1 0 30 feet 0 60 feet 0 120 feet 0 360 feet 192 kHz 192 000 cyclesper second accuracy is within 0 6 percent its volts DC to 1 8 amps depending on printing densityand output power 900 watts typicalp...

Page 4: ...level depth range paper speed andthe degree of grayline used to enhancethe recorded information Thepatented Lowrance variable suppression system notonly filtersoutfalsesignals withoutdistorting the realones but issynchronized withthegraylinefunction toprovide clearsignals underallconditions The permanent record ofwhatyoursonar has seen is rolled and storedinside the case 2 Do carry asparefuse sty ...

Page 5: ... periodicallywithmild soapywatertoremoveanyaccumulatedroadgrimeor oilyfilm This isessential to havegood contactbetweenthetransducer and the water Periodically the rubber roller on the paper driveshould be cleaned witha cloth dampenedwithalcohol to improvethefriction onthedriveshaft See page 16 Figure29 HOW IT WORKS When the unit is turned on an electronically regulated motor drives a lightweight b...

Page 6: ...pectively B represents anecho asecondsignal caused from averyhard orreflective bottom surfacewhichcausesthesonarsignaltobouncebacktothewater s surface return tothe bottom and reflect backtothereceiverTherefore the time forasonar signalto traveltothe bottomand back tothesurface has doubled Ifthetruebottom reading is16feet theechowillappearat32feet Ifthetrue depth wereten feet then the echowould occ...

Page 7: ...mainder ofthisbooklettogetthemost from yourinvestment and to boost your boating and fishing pleasure Fig 7 Fig 35 Fig 37 p 5 10 p 7 r BOTTOM Is 25 THISISWHAT AREPRESENTATIVEAREAWOULDLOOKLIKEONTHE0 30 SCALE 30 7 Afterinstalling ifthe styluswon t print allthewaydown thepaper See Figure 37 bend the right leg down so that more pressure is exerted against thestainlesssteelplate Ifitstill doesnotprint a...

Page 8: ...isattached tothecenterconductorofthepowercableasclose tothepowersource aspossible Thiswillprotectboththe unitandthepower cableincaseeitheris evershorted A connector is supplied to attach the fuseto the power cable The positive conducterin the power cableis the centerconductor The unit is protected from accidental polarity reversals and no damagewill resultif batteryconnections are wrong However th...

Page 9: ...knobworks much likethevolumecontrol on a radio that is weaker signals will be detected with highersettingsofthe knob When cruising or at othertimeswhen justsimple bottom contour information is desired the Sensitivity setting canbe low In deepwateror oversoft muddy bottoms which produce weakechoes the settingwill haveto be higher WhenhighSensitivity settings are used asecond bottomechowillappear Th...

Page 10: ...e and the ability to separate fish fromthe bottom or fromother fish will bedecreased See page 12 Figure22 Therefore thelowerthesuppression sellingthe better Advance the knob selling only asfaras necessary to removethe erratic unwanted noise marks Most of the time at low or trolling speeds no suppression will be needed PAPER SPEED KNOB Controls the speed ofthe chartpaper Forgood detail whentrolling...

Page 11: ...strecord If gaps appear between stylusstrikes the paperisrunning too fast Thepaperspeed may also be turned downto conserve paper when not lookingfor fish or con cerned withfine detail r p BOULDERS LARGEROCKS Ag 13 GRAYLINP ON 7 Putafresh rollofpaperin position on thecentering postsofthe paper spool end capson the supply side right of the platen assembly The paper mustspool offthe bottomofthe roll ...

Page 12: ...t atthe 3 4point orhigher See C Figure 17 Remember too thatthere mustbe somemovement between the fish and boat to develop the archedmark knob until it snaps out See Figure 26 The roll can now be easily removed fromthepaperspool end caps See Figure 27 60 THERMOCLINES The temperature of water in the lake is seldom constant fromtopto bottom Layers ofdifferent temperatures form andthe junctionofawarma...

Page 13: ... 25 High Speed 46 M P H SUPPRESSION OFF SENSITIVITY ON 1 2 POSITION NOTE POOR RECORD CAUSED BYNOTUSING SUPPRESSION WHENAT HIGH SPEED Fig 18 A JIGGING A1 oz HOPKINS SPOON IN SUBMERGED TREE B FISH SIGNALS BOAT DRIFTING VERY SLOWLY OVER FISH C BAITFISH High Speed 46 M P H SUPPRESSION ON ADEQUATESETTING SENSITIVITY ON 1 2 POSITION 14 GRAYLINE OFF A FISH ON OR NEARBOTTOM Fig 20 y wfl M VM I IA GRAYLINE...

Page 14: ... SCALE 0TO 60 FEET GRAYLINE OFF 2 Releasebothcatchesonthetopofthecase Pulloutanddownonthetop ofthe case frontto expose theplaten assembly See Figure 24 Fig 23 C C I Fig 22 SUPPRESSIONz TOO HIGH SUPPRESSION PROPER SElliNG NOTETHAT RECORDER SIGNALSFROM NOTE DISTINCT INDIVIDUAL SCHOOLS OF BAIT FISH ARE ELON SCHOOLS OF BAITFISH GATED AND RUN TOGETHER WITHTHE BOTTOM END OF PAPER MARKER The graph paper ...

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