Xerox Phaser 840, Service Manual

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4 - 122 Phaser 840/850/860/8200 Color Printer - Service Manual
Built-in Diagnostics (Phaser 860 Only)
The Phaser 860 has three built-in diagnostic routines that can be run to troubleshoot
printer problems.
Note
The Phaser 860 diagnostics are accessible through the printers
front panel menus rather than requiring a laptop connection.
Auto Diagnostics
- Selecting auto diagnostics from the service tools menu or via
CentreWare IS, will run a predefined set of diagnostic tests and then return the printer to
ready mode. This interface was designed primarily for remote users who did not have
immediate access to the printer.
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Report Current Temps
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Check Voltages
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Check Paper Path Status
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Check Y-Axis Geometry
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Check Cap Axis Geometry
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Check Transfix Axis Loading
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Check DM Performance
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Check Paper Path Timing
Customer Accessible Diagnostic Mode
- This mode gives access to a subset of
the service diagnostic tests. Refer to the Diagnostic Menu Map; items with an ‘*’ are not
available in this mode, but must be accessed through the hidden service diagnostic mode,
detailed below.
Service Diagnostics Mode
- This mode can be entered from either the hidden
service menu or by powering up the printer with DIP switch 1 in the down position. All
diagnostics are available in this mode.
Diagnostic tests will not run in normal printing mode, it is necessary to reboot the printer
after entering or exiting all diagnostic modes. The printer will keep the printer thermals
hot during diagnostics to avoid unnecessary cleaning cycles. If a diagnostic test runs into a
problem while initializing the heaters a message will display, “Test Fault, can’t warm up -
press any key”, you can still continue to run diagnostics under this condition.
Diagnostic Results
- Results from diagnostic tests are displayed on screen. Results
from the last six Check Menu diagnostics can be viewed in the Diagnostic History
available from the front panel, or from lines 401-406 using the CentreWare IS interface.
The results will be displayed in the follwing format: “ID: xx, TS: x, PC: xx, Date of Test,
Time of Test R0: xx, R1: xx, R2: xx....Rn: xx.”
ID: xx - The ID number from the test, refer to the Check Menu test results for the ID’s
associated with the tests.
TS: x - The Termination Satus, the status the test was in when it ended (in case the test
failed or was interupted before completion).