Running Built-In Diagnostics; Diagnostic Tests - Tektronix Z780N - Phaser 780 Color Laser Printer Reference Manual

Running built-in diagnostics

The printer diagnostic interface consists of a front panel containing a 2 line by
40 character LCD display and six buttons. For diagnostics, the front panel
switches are identified as 1 through 6 with switch 1 being the left-most switch
and switch 6 being the right-most switch.
To place the printer in service diagnostics mode
string of " " to appear on the front panel display, as they appear, press and hold
*
button 3 for five seconds. You select individual test by navigating a tree-structure
with three buttons defined as Prev, Next, and Select.
Help Mode.
You can enter a Help mode at the top level by pressing Prev or Nest
until Help Mode On/Off is displayed. Once you select Help mode and "H" is
displayed on the lower-right corner of the display. With help mode enabled, once
you select a test, information about the test is displayed in the top line of the
display. Buttons 3 and 4 are relabeled as Quit and More. Pressing More displays
additional information about the test. Pressing Quit leaves the test description
and asks if you want to run the test.
Table 1 Diagnostic tests
Test
Service Print
Image Processor
Engine ROM Revision
Sub-tests
Source
Output
Media
Print
Paper Path Test
Kernel, DIMMs, ROMs,
I/O
. Turn on the printer and wait for a
Detail
Tray 1
Tray 2
Tray 3
Tray 4
MPT
Right Side
Top Cover
Paper
Transparency
Label
Cover
Black Grid
Color Grid
Black Patch
Color Patch
Service Guide
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