Xerox 8830 Service Manual page 435

Full System Test
(Figure 11): Selecting Full System Test displays the Full System Test screen. This test
operates the complete set of diagnostic tests.
Selecting the START button will start the sequence of tests. This test sequence will be exe-
cuted until the operator presses the EXIT key, or until alt sub tests are completed.
Figure 1 1 . Full System Test Screen
• Each letter corresponds to a test, identified in the table below.
• While a sub test is in progress, an R is displayed to the right of the test letter. If the sub test
is successful, a P is displayed.
• If a sub test falls, an F Will be displayed.
NOTE: If an explicit report on a given memory test is desired, use the Memory Tests selection
Instead of the Full System Test selection.
Table 1 Pull System Test Elements
Test
A
Error Diffusion Test
B Byte Counter Test
C System Threshold Test
0 Digital Signal Processor Test
E Compressor Test
F Output Suffer Test
G Line Clipper Test
H Scalar Test
Grayscale Enhancement Test
I
J
Memory Tests
K Normalization
8830 DDS
HMtMA-YWO
Description
Memory Tests
(Figure 12): The Memory Tests screen is accessed by selecting the Memory Tests button on
the Scanner Diagnostics Menu screen.
Figure 1 2 . Memory Tests Screen
Each test letter corresponds to a test, identified in the table below.
To the right of each letter is a digit that Indicates the number of times that particular test
has been executed and passed.
Selecting the START button will start the tests. Each test wilt be executed, and evaluated
as PASSED or FAILED. When the last test Is complete, the first test is executed again.
XX Indicates more that a particular test has failed more than one time.
Each Item in the display will either be blank, or display the number of test iterations in
shaded format
The tests may be stopped at any time by selecting the EXIT button.
Table 2 Memory Test Elements
Test
A Line Memory
B Normalization Memory
C Map Memory
D System Memory
E ROM Memory
F NVRAM Memory
G Output FIFO Memory
H Scaler Memory
I Grayscale Enhancement Memory
3/98
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M00016A-WHO
Description
General Procedures
Diagnostics