Towfish D-43D.8.6 Towfish Bottle ElectronicsThe towfish bottle electronics is shown in Figure D-16.D.8.7 Removing the Towfish ElectronicsTo remove the towfishelectronics:1. Remove the towfish nosecone by unscrewing thesocket head cap screw inthe center with a 8-mm hexkey or driver. Once youhave the nose cone off youwill find the push/pullassembly shown inFigure D-17.This assembly is used toinsert or remove theelectronics from thepressure housing.Positioned one way theTable D-2: Troubleshooting Chart—2P or 2S ConnectionsTRANSDUCERCRYSTAL10-PINBULKHEAD 2P/2S RECEIVERBOARDTRANSMITTERBOARD TEST CODEGND 1 7 —Xtal 7 2 6 IN7 TX4 Channel 7Xtal 8 3 1 IN8 TX4 Channel 8Xtal 9 4 2 IN9 TX5 Channel 9Xtal 10 5 3 IN10 TX5 Channel 10Xtal 11 6 4 IN11 TX6 Channel 11Xtal 12 7 5 IN12 TX6 Channel 12Figure D-16: Towfish Bottle ElectronicsFigure D-17: Push/Pull Assembly
