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Signal Nomenclature
Refer to
Figure 7
for an example of Signal Nomenclature used in Circuit Diagrams and BSDs.
Figure 7 Signal Nomenclature
Voltage Measurement and Specifications
Measurements 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.
Table 1 Voltage Measurement and Specifications
VOLTAGE
SPECIFICATION
INPUT POWER 220 V
198 VAC TO 242 VAC
INPUT POWER 100 V
90 VAC TO 135 VAC
INPUT 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 VDC
Logic Voltage Levels
Measurements of logic levels must be made with reference to the specified DC Common,
unless some other point is referenced in a diagnostic procedure.
Table 2 Logic Levels
VOLTAGE
H/L SPECIFICATIONS
+5 VDC
H= +3.00 TO +5.25 VDC
L= 0.0 TO 0.8 VDC
+24 VDC
H= +23.37 TO +27.06 VDC
L= 0.0 TO 0.8 VDC
Initial Issue
WorkCentre 5335 Family Service Documentation
DC Voltage Measurements in RAPs
The RAPs have been designed so that when it is required to use the DMM to measure a DC
voltage, the first test point listed is the location for the red (+) meter lead and the second test
point is the location for the black meter lead. For example, the following statement may be
found 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.
Other examples of a statement found in a RAP might be:
•
There is -15 VDC from TP21 to TP33.
•
-15 VDC is measured between TP21 and TP33.
•
In these examples, the red meter lead would be placed on TP21 and the black meter lead
would be placed on TP33.
•
If a second test point is not given, it is assumed that the black meter lead may be attached
to the copier frame.
07/2011
ix
BUS Updated 12/2011
Introduction
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