Xerox Phaser 8860, Service Manual

Page: 10 / 316

09/2007
x Phaser 8860/8860MFP Service Manual
Symbology and Nomenclature
Initial Issue Introduction
The surface is hot while the printer is running. After turning off the power, wait 30 minutes.
Figure 4 Wait 30 Minutes Symbol
Avoid pinching fingers in the printer. Use caution to avoid personal injury.
Figure 5 Pinch Injury Symbol
Use caution (or draws attention to a particular component). Refer to the manual(s) for informa-
tion.
Figure 6 Use Caution Symbol
Electrostatic Discharge (ESD) Field Service Kit
The purpose of the ESD Protection Program is to preserve the inherent reliability and quality of
electronic components that are handled by the Field Service Personnel. This program is being
implemented now as a direct result of advances in microcircuitry technology, as well as a new
acknowledgment of the magnitude of the ESD problem in the electronics industry today.
This program will reduce Field Service costs that are charged to PWB failures. Ninety percent
of all PWB failures that are ESD related do not occur immediately. Using the ESD Field Service
Kit will eliminate these delayed failures and intermittent problems caused by ESD. This will
improve product reliability and reduce callbacks.
The ESD Field Service Kit should be used whenever Printed Wiring Boards or ESD sensitive
components are being handled. This includes activities like replacing or reseating circuit
boards or connectors. The kit should also be used in order to prevent additional damage when
circuit boards are returned for repair.
The instructions for using the ESD Field Service Kit can be found in ESD Field Service Kit
Usage in the General Procedures section of the Service Documentation.
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.
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.
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.
If a second test point is not given, it is assumed that the black meter lead may be attached to
the copier frame.
Table 3 Voltage Measurement and Specifications
Voltage Specification
INPUT POWER 220 V 198 VAC TO 254 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
Table 4 Logic Levels
Voltage H/L Specification
+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