Dram Error; Rom Memory Test; Parallel Wrap Test - Lexmark W820 Service Manual

DRAM Error

Once the maximum pass count or fail count is reached, the test is stopped and the final
test results are displayed. Press Return or Stop to exit the test.

ROM Memory Test

Use the ROM Memory Test to check the validity of the RIP code and fonts. When you
select this test from the operator panel, the following screen is displayed and the printer
begins testing ROM memory for the first time.
ROM Memory Test
P:###### F:#####
Terminology:
•
•
The power indicator blinks indicating the memory test is in process. The printer
continually runs the same test until cancelled from the operator panel (by pressing
Return or Stop).
Each time the test finishes, the screen is updated with the result. If the test passes, then
the Pass Count is incremented by 1. However, if the test fails, then one of the following
failure messages is displayed for approximately 3 seconds and then the Fail Count is
incremented by 1.
•
•
Once the maximum pass count or fail count is reached, the test is stopped and the final
test results are displayed. Press Return or Stop to exit the test.

Parallel Wrap Test

Use the Parallel Wrap Test to check the operation of the parallel port hardware using a
wrap plug. Each parallel signal is tested.
To perform the wrap test:
1.
2.
3.
4.
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Service Manual
P:###### represents the number of times the memory test has passed (finished
successfully). Initially 000000 is displayed for ######. The maximum pass count is
999,999.
F:##### represents the number of times the memory test has failed (finished with
errors). Initially 00000 is displayed for #####. The maximum fail count is 99,999.
ROM Checksum Error
ROM Burst Read Error
Disconnect the parallel interface cable, and install the parallel wrap plug.
Select HARDWARE TESTS from the Diagnostics Menu.
Select Parallel Wrap to initiate the Parallel Wrap Test.
Select the appropriate Parallel Wrap Test (Parallel Wrap, Parallel 1 Wrap, Parallel 2
Wrap, or Parallel 3 Wrap).
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