Lexmark X746de Service Manual page 211

Button Test
This test verifies the operator panel button function.
To run the Button Test:
Touch HARDWARE TESTS from the Diagnostics Menu.
1.
Touch Button Test.
2.
A keypad displays on the operator panel. Press each physical button one at a time and observe if its
3.
corresponding button on the display lights up.
4. Touch Back to end the test.
DRAM Test
This test checks the validity of DRAM, both standard and optional. The test writes patterns of data to DRAM to
verify that each bit in memory can be set and read correctly.
To run the DRAM Test:
Navigate to Diagnostics Menu> HATDWARE TEST > DRAM Test.
1.
The MFP turns off and re-starts (POR), and then the power indicator blinks, indicating the test is in
2.
progress.
The following counter appears:
DRAM Test xxxMB P:000000
To interpret the test:
xxxMB indicates the amount of DRAM memory the MFP has detected.
•
• P:###### represents the number of times the memory test has passed and finished successfully. Initially,
000000 displays with the maximum pass count being 99,999.
F:##### represents the number of times the memory test has failed and finished with errors. Initially,
•
00000 displays with the maximum fail count being 99,999.
Once the maximum pass count or fail count is reached, the test is stopped, the power indicator turns on solid,
and then the final results appear. If the test fails, SDRAM Error appears for approximately three seconds and the
failure count increases by 1.
Note: If you need to exit the test before it is complete, turn off the printer.
Serial 1 Wrap
The Serial 1 Wrap Test is used to check the operation of the serial port hardware using a wrap plug. Each serial
signal is tested.
To perform the Serial 1Wrap Test:
1. Disconnect the serial interface cable, and then install the serial wrap plug.
Touch HARDWARE TESTS from the Diag Menu.
2.
Touch Serial 1 Wrap.
3.
The power indicator blinks indicating the test is in progress. The following messages appear
Serial Wrap [x] Testing...
Resetting the Printer
Upon completion of the POR, the following message is displayed:
Serial Wrap P:000000
The test will stop when it reaches the maximum values, or press
4.
F:0000
F:0000
to end the test before it is complete.
Diagnostic aids
7526
Previous
Next
Go Back
3-13