RIGOLSafety Notices and SymbolsSafety Notices in this Manual:WARNING Indicates a potential y hazardous situation or practice which, if not avoided, wil result in serious injury or death. CAUTION Indicates a potential y hazardous situation or practice which, if not avoided, could result in damage to the product or loss of important data. Safety Terms on the Product:DANGER It cal s attention to an operation, if not correctly performed, could result in injury or hazard immediately. WARNING It cal s attention to an operation, if not correctly performed, could result in potential injury or hazard. CAUTION It cal s attention to an operation, if not correctly performed, could result in damage to the product or other devices connected to the product. Safety Symbols on the Product:HazardousSafetyProtectiveChassisTestVoltageWarningEarthGroundGroundTerminal IV DS1000Z-E Service Guide Document Outline Guaranty and Declaration Safety Requirement General Safety Summary Safety Notices and Symbols Document Overview Disassembly and Assembly Notices to Disassembly and Assembly Exploded View Drawing Disassemble the Rear Panel Disassemble the Metal Rear Panel Disassemble the Knob Disassemble the Front Panel Disassemble the Keypad Board and LCD Disassemble the Main Board Assembly Procedures Troubleshooting&Maintenance Troubleshooting Maintenance System Maintenance Warranty Care and Cleaning Environmental Considerations