Simrad SP90

Maintenances7.3 Transceiver UnitDust filterThere is a dust filter in the bottom of the Transceiver Unit. To avoidoverheating, this must be inspected, and if necessary, cleaned onceevery third month.The dust filter is accessible from the outside of the TransceiverUnit, by unscrewing the eight finger nuts in the bottom of the unit.The filter should be vacuum cleaned, or washed in soap and water.If washed, the filter must be dried thoroughly before beingreinstalled.Replacing fusesThe Transceiver Unit is fused with two 8A slow blow main fuses(F201 and F202) located on the front of the Power Supply. If oneof the fuses are blown, the lamp L201 should be lit, while lampL202 should be extinguished. If L201 is not lit, check the fuses ofthe ship’s main power system.F201F202F204F205(CD5947)Dust filterFigure 18 The Transceiver Unit fuse locationsIn addition, the High Voltage Unit is fused with two 8A slow blowfuses (F204 and F205). If one of the fuses is blown, the lamp L205should be lit, while lamp L206 should be extinguished.850--164511 / B149