February, 2008viiWorkCentre 5225, 5230IntroductionLaunch VersionSignal NomenclatureRefer to Figure 7 for an example of Signal Nomenclature used in Circuit Diagrams and BSDs.Figure 7 Signal NomenclatureVoltage Measurement and SpecificationsMeasurements of DC voltage must be made with reference to the specified DC Common,unless some other point is referenced in a diagnostic procedure. All measurements of AC volt-age should be made with respect to the adjacent return or ACN wire.Logic Voltage LevelsMeasurements of logic levels must be made with reference to the specified DC Common,unless some other point is referenced in a diagnostic procedure.DC Voltage Measurements in RAPsThe RAPs have been designed so that when it is required to use the DMM to measure a DCvoltage, the first test point listed is the location for the red (+) meter lead and the second testpoint is the location for the black meter lead. For example, the following statement may befound in a RAP:There is +5 VDC from TP7 to TP68.In this example, the red meter lead would be placed on TP7 and the black meter lead on TP68.Another example of a statement found in a RAP might be:There is -15 VDC from TP21 to TP33.In this example, the red meter lead would be placed on TP21 and the black meter lead wouldbe placed on TP33.If a second test point is not given, it is assumed that the black meter lead may be attached tothe copier frame.Table 1 Voltage Measurement and SpecificationsVOLTAGE SPECIFICATIONINPUT POWER 220 V 198 VAC TO 242 VACINPUT POWER 100 V 90 VAC TO 135 VACINPUT POWER 120 V 90 VAC TO 135 VAC+5 VDC +4.75 VDC TO +5.25 VDC+24 VDC +23.37 VDC TO +27.06 VDCTable 2 Logic LevelsVOLTAGE H/L SPECIFICATIONS+5 VDC H= +3.00 TO +5.25 VDCL= 0.0 TO 0.8 VDC+24 VDC H= +23.37 TO +27.06 VDCL= 0.0 TO 0.8 VDC
