Xerox Nuvera 100, Service Manual

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Troubleshooting 3-31
PC-based Diagnostics
The PC-based diagnostics is provided for interactively testing the
operations and functionality of the printer. The diagnostics are
provided on a 3-1/2 inch floppy diskette. All of the diagnostic tests are
started from the PC and are downloaded to the printer.
The PC-based diagnostics were developed to run on a PC as this is
the portable computer in use by the field service organization.
Requirements
• Printer serial cable adapter (level shifter), P/N 012-1543-00.
• Serial null modem cable, P/N 012-1535-00.
• IBM PC or PC-clone or compatible, preferably a Pentium® or
486; 286-based PCs are intolerably slow.
• At least 640K of RAM. About 2 Mbytes of disk space to store
the diagnostic program and its test suite.
• A mouse is optional, but is not supported by the user interface.
• MS-DOS environment. This may be Windows® DOS or MS-
DOS on a PC.
By convention, each set of diagnostic files is installed into a single
directory (for ease of removal and updating);
C:\100DIAGS\<
version number>\
is the default
(i.e.:
C:\100DIAGS\1128
)
Starting The Diagnostics
1. Turn off the printer and the Service Laptop computer. Connect
the serial port of the computer to the special diagnostic, 5-pin
serial port of the printer; using the special serial cable adapter.
(Pin 1 is the left-most pin of the five pin connector, looking at
the back of the printer).
2. Push down Switch 1, the service mode DIP switch. (The switch
is the left-most of the four DIP switches on the rear panel of
the printer, looking at the back of the printer) The other
switches should be up.
3. Using the serial null modem cable, connect the serial port
adapter to the COM1: serial port on the PC.
4. Turn on the PC in DOS mode. Older versions of Windows 95
will only run the PC-based diagnostics if the computer is
booted in DOS mode; they will not run the diagnostics from the
MS-DOS Prompt application.