User manual LOWRANCE LRG-1500A

[. . . ] INSTALLATION AND OPERATION MANUAL MODELS LRG-1500A AND LRG-1500M TRULINE RECORDER Printed in U. S. A. 988-0088-02 LOWRANCE INC. OKLA. PDF compression, OCR, web-optimization with CVISION's PdfCompressor / NOTICE Periodicallywash the Transducer Face with soap and water to remove anyof/film thatmaycollect Oiland dirt on the face will reduce sensitivityor may evenpreventsounding. GOT A PROBLEM?LET US HELP! If you havea problem with your sonar unit, please give us achance to help before sending it in for repair. Assistance can often be extended by telephone or letter. [. . . ] 6 \) rvt, 1j;;;. The LRG-1500A/M is a complete sonar. Its controls are simple enough for the occasional fisherman, and flexible enoughto satisfythe most demandof ing pro. We encourage youto studytheremainder this booklet to get the mostfromyour investment and to boostyour boating and fishing pleasure. A B 7. After installing, if the styluswon't print all the way downthepaper, (See Figure 37) bend the right leg down so that more pressure is exerted againstthe stainless steel plate. If it still does not print all theway, bend the left leg down more (but not so far that it digs into the paper). Latch both catches on the top of the case. -. , . *B -. . STYLUS BELT REPLACEMENT High voltage is present in the electronicsection when the unit is turned on. Release both catches on thetopofthecase. Pull outand down on thetop of the case front to expose the stylus belt. The stylus belt rides over two wheels located at the right edge of the platen assembly. Move the front of the belt DOWN to position the stylus at the center of the platen. Thiswill protectboththeunitandthe power cable in case either is ever shorted. A connectoris suppliedto attach the fuse to the powercable. L Fig. 8 The positive conducter the power cable isthe centerconductor. Theunitis in protected from accidental polarity reversals and no damagewill result if battery connections are wrong. (However, the unit will not work. ) stylus holder. Before installing the new stylus, be sure it is bent properly by comparing it to Figure 35. 4. Hold the stylus beltstationary with onefinger, and remove the old stylus by starting at its left edge and moving it out from underthe tabson the 6. Referto Figure 36 to be sure the new stylusis positioned correctly under the tabsontheholder. Ifnot, bend the stylus awayfrom the edge it is rubbing on until it does move freely. 19 PDF compression, OCR, web-optimization with CVISION's PdfCompressor 10. Push the platen assembly back to its operating position. Be sure it engages the catch inside the top of the case. (See Figure 32. ) OPERATION SCALE KNOB -- used to select recording depth. There are four positions: LRG-1500A 60 feet, with high transmitter power 120 feet, with high transmitter power 360 feet, with high transmitter power METRIC LRG-1500M 60 feet, with low transmitter power 18 meters, with low transmitter power 18 meters, with high transmitter power 30 meters, with high transmitter power 60 meters, with high transmitter power Fig. 32 11. Close the front of the case. [. . . ] Sharp, well-defined signatures will occur most often when the Sensitivity knobis set at the 3/4 pointor higher. (See (C), Figure 17. ) Remember, too, that there must be some movement between the fish and boat to develop the arched mark. Fig. 17 30 -- 40 -- 50 -- 60 -- THERMOCLINES-- The temperature of water in the lake is seldom constant fromtop to bottom. Layers ofdifferenttemperatures form, and the junctionof awarmand cool layerofwateris called a thermocline. [. . . ]