dV-DOSC dV-SUB Manual V2.0 Nov 2001 1205. MAINTENANCE AND INSTALLATION TOOLS5.1 RECOMMENDED MAINTENANCE PROCEDURESRegular maintenance procedures (monthly) include:component sweep (using sine wave generator or other suitable test system) and polaritycheck to ensure that all speakers and drivers are in good working ordercable continuity testclean power amplifier filtersverify crossover presets are correct and up to datePeriodic maintenance procedures (every 6-12 months) include:tighten high frequency diaphragm mounting fastenersinspect all rigging components for wear and replace as necessaryinspect wiring harnesses, internal connections for all panelsOccasional (as necessary) maintenance procedures include:refoam grillesrepaint cabinets5.2 RECOMMENDED MAINTENANCE TOOLSTable 16: Recommended Maintenance ToolsAPPLICATION dV-DOSC SERVICE TOOLSAs Required #2 Phillips screwdriverMF Speaker Mount 4 mm hex keyHF Diaphragm Mount 4 mm hex keyDOSC Waveguide Mount Bolt 10 mm socketMiscellaneous Tools : adjustable pliers, rubber mallet, sidecutters, wire stripper, solderingiron, digital voltmeter (DVM), breakout cables for speaker testing (CA COM to banana leads).