About This Manual; Organization; How To Use This Documentation - Xerox Phaser 7760 Service Manual

About this Manual

The Phaser 7760 Color Laser Printer Service Documentation is the primary document used for
diagnosing, repairing, maintaining, and troubleshooting the printer. It is the controlling publica-
tion for a service call. Information on its use is found in the Introduction of the Service Docu-
mentation.
For Online Support Assistant (OSA) and Software/Driver Updates, visit www.xerox.com/office/
7760support.
Service Documentation Revision
The Service Documentation will be updated as the machine changes or as problem areas are
identified.

Organization

The titles of the sections and a description of the information contained in each section are
contained in the following paragraphs:
Introduction and General Information
This section contains documentation organization, symbology and nomenclature, translated
warnings, safety symbols, regulatory specifications, and general information.
Section 1 - Service Call Procedures
This section contains procedures that determine what actions are to be taken during a service
call on the machine and in what sequence they are to be completed. This is the entry level for
all service calls. This section covers the General Startup, PostScript, and Power Supply Opera-
tions of the printer to aid in troubleshooting not associated with an error code or Front Panel
error message.
Section 2 - Status Indicator RAPs
This section contains the diagnostic aids for troubleshooting the Fault Code and non-Fault
Code related faults (with the exception of image quality problems).
Section 3 - Image Quality
This section contains the diagnostic aids for troubleshooting any image quality problems, as
well as image quality specifications and image defect samples.
Section 4 - Repairs/Adjustments
This section contains all the Repairs and Adjustments procedures.
Repairs
Repairs include procedures for removal and replacement of parts which have the following spe-
cial conditions:
When there is a personnel or machine safety issue.
When removal or replacement cannot be determined from the exploded view of the
Parts List.
When there is a cleaning or a lubricating activity associated with the procedure.
When the part requires an adjustment after replacement.
Revised
Phaser 7760 Color Laser Printer
When a special tool is required for removal or replacement.
Use the repair procedures for the correct order of removal and replacement, for warnings, cau-
tions, and notes.
Adjustments
Adjustments include procedures for adjusting the parts that must be within specification for the
correct operation of the system.
Use the adjustment procedures for the correct sequence of operation for specifications, warn-
ings, cautions and notes.
Section 5 - Parts Lists
This section contains the Printer and Finisher Parts Lists.
Section 6 - General Procedures/Information
This section contains General Procedures and Diagnostic Programs.
Section 7 - Wiring Data
This section contains drawings, lists of Plug/Jack locations, and diagrams of the power distribu-
tion wire networks in the machine. Individual wire networks are shown in the Circuit Diagrams
contained in Section 2. This section also contains the Block Schematic Diagrams.
Section 8 - Theory of Operation
This section contains detailed functional information on the print engine components.

How to Use this Documentation

The Service Call Procedures in Section 1 describe the sequence of activities used during the
service call. The call must be entered using these procedures.
Use of the Circuit Diagrams
Circuit Diagrams (CDs) are included in Section 2 (Status Indicator RAPs) and Section 3 (Image
Quality RAPs) of the Service Documentation. All wirenets, with the exception of power distribu-
tion wirenets, are shown on the CDs. Power distribution wirenets are shown in Section 7 (Wir-
ing Data) of the Service Documentation. The power distribution wirenets on the CDs will end at
the terminal board for the power being distributed. Find the wirenet for that power and locate
the terminal board on the wirenet. Use the wirenet to troubleshoot any power distribution wiring
not shown on the CD.
Use of the Block Schematic Diagrams
Block Schematic Diagrams (BSDs) are included in Section 7 (Wiring Data) of the Service Doc-
umentation. The BSDs show the functional relationship of the electrical circuitry to any
mechanical, or non-mechanical, inputs or outputs throughout the machine. Inputs and outputs
such as motor drive, mechanical linkages, operator actions, and air flow are shown. The BSDs
provides an overall view of how the entire subsystem works.
The BSDs do not contain an Input Power Block referring to Chain 1. It will be necessary to refer
to the Wirenets in order to trace a wire back to its source.
January 2010
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Introduction
About this Manual, Organization