Lexmark C910 5055-01x Service Manual page 139

Lexmark color printer service manual
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5055-01x
DRAM Memory Test
The DRAM Memory Test is used to check the validity of DRAM (both
standard and optional). Patterns of data are written to DRAM
verifying each bit in memory can be set and read correctly. When
this test is selected from the operator panel, the printer begins
testing DRAM memory and the following screen displays.
Terminology:
P:###### represents the number of times the memory test finishes
successfully. Initially 000000 displays for ######. The maximum
pass count is 999,999.
F:##### represents the number of times the memory test finishes
with errors. Initially 00000 displays for #####. The maximum fail
count is 99,999.
The power indicator blinks indicating the memory test is in process.
The printer runs this test continually. The test can be terminated by
powering off the printer. Each time the test finishes, the screen is
updated with the result. If the test is successful, the Pass Count
increments by 1. If the test fails, a failure message displays for
approximately three seconds and the Fail Count increments by 1.
Once the maximum pass count or fail count is reached, the test
stops and final test results display.
DRAM Memory Test
P:##### F:#####
Diagnostic Aids
3-11

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