Rom Test; Parallel Wrap Test - Lexmark C752 Service Manual

5060-2XX

ROM Test

The ROM memory test is used to check the validity of the controller board code and fonts.
To run the ROM Test:
1.
Select ROM Test from the menu. P and F represent the same numbers for DRAM.
The power indicator blinks indicating the test is in progress. The test runs continuously.
2.
Press Return or Stop to exit the test.
Each time the test finishes, the screen updates with the result. If the test passes, the Pass Count increases by 1,
however if the test fails, one of the following messages appears for approximately three seconds:
ROM Checksum Error
ROM Burst Read Error
Once the maximum pass count or fail count is reached, the test stops with the power indicator on solid. The final
results display.

Parallel Wrap Test

Use this test with a wrap plug to check operation of the parallel port hardware. Each parallel signal is tested.
To run the Parallel Wrap Test:
1.
Disconnect the parallel interface cable and install the wrap plug (P/N 1319128).
2.
Select the Parallel Wrap Test from the menu.
The power indicator blinks indicating the test is in progress. The test runs continuously until canceled.
Each time the test finishes, the screen updates. If the test passes, the Pass Count increases by 1, however if the
test fails, one of the following messages appears for approximately three seconds:
Sync Busy Error
Byte Interrupt Request Error
Strobe Interrupt Request Error
Init Fail Error
Init Busy Error
Init Rise Error
Host Busy Error
RAM Data FF Error
RAM Data AA Error
RAM Data 00 Error
RAM Data 55 Error
DMA Count Error
DMA Address Error
DMA Interrupt Error
DMA Memory Error
DMA Background Error
Clear Init Rise Error
False Init Rise Error
Autofeed Rising Interrupt Error
Clear Autofeed Rise Error
False Autofeed Rise Error
Autofeed Falling Interrupt Error
Clear Autofeed Fall Error
Once the maximum count is reached the test stops, the power indicator goes on solid and the final results are
display. Press Return or Stop to exit the test.
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