Xerox 3450B Service Manual - Page 4

Service Terms Manual Terms Various terms are used throughout this manual to either provide additional information on a specific topic or to warn of possible danger present during a procedure or action. Be aware of all symbols and terms when they are used, and always read NOTE, CAUTION, and WARNING statements. Common Acronyms: The following list defines the acronyms that may be found in this manual. ADC: Automatic Density Control NCS: Non-Contact Sensor BTR: Bias Transfer Roller PHD: Imaging Unit CRUM: Customer Replaceable Unit Monitor PL: FRU Parts List. CTD: Toner Density Control PTL: Pre-Transfer Lamp DRV: Motor Driver Board RMI: Routine Maintenance Item ESD: Electrostatic Discharge RMS: Root-Mean-Square LSU: Laser Scanning Unit RTC: Charge Roller MCU: Engine Control Board Note A note indicates an operating or maintenance procedure, practice or condition that is neccessary to efficiently accomplish a task. A note can provide additional information related to a specific subject or add a comment on the results achieved through a previous action. Caution A caution statement indicates an operating or maintenance procedure, practice or condition that, if not strictly observed, could result in damage to, or destruction of, equipment. Warning A warning statement indicates an operating or maintenance procedure, practice or condition that, if not strictly observed, could result in injury or loss of life. Product Terms Caution: A personal injury hazard exists that may not be apparent. For example, a panel may cover the hazardous area. Danger: A personal injury hazard exists in the area where you see the sign. Service Manual iii