Lexmark X792 7562-4xx, Service Manualv

Page: 254 / 855

3-16
Service Manual
7562
Go Back
Previous
Next
Button Test
This test verifies the operator panel button function.
To run the Button Test:
1.
From the Diagnostics menu, navigate to:
HARDWARE TESTS > Button Test
2.
With no buttons pressed, a pattern matching the operator panel buttons is displayed. Press each operator
panel button one at a time, and an “X” displays in the box that represents the button.
3.
Press Stop (
X
) or touch Back to exit the test.
DRAM Test
This test checks the validity of DRAM, both standard and optional. The test repeatedly writes patterns of data to
DRAM to verify that each bit in memory can be set and read correctly.
To run the DRAM Test:
From the Diagnostics menu, navigate to:
HARDWARE TESTS > DRAM Test
DRAM Test Testing…
appears on the screen, followed by
Reseting the Printer
.
After the printer resets, the results of the test appear:
DRAM Test (x)MB P:###### F:######
.
(x) represents the size of the installed DRAM.
P:###### represents the number of times the memory test has passed and finished successfully, with the
maximum pass count being 999,999.
F:##### represents the number of times the memory test has failed and finished with errors, with the maximum
fail count being 999,999.
Once the maximum pass count or fail count is reached, or once all the DRAM has been tested, the test stops
and the final results appear.
Serial Wrap Test
Use this test to check the operation of the Serial Port Hardware using a wrap plug. Each signal is tested. If the
test fails, replace the system board.
To run the Serial Wrap Test:
1.
Disconnect the serial interface cable, and install the wrap plug.
2.
From the Diagnostics menu, navigate to:
HARDWARE TESTS > Serial Wrap Test
Select the appropriate Serial Wrap Test from the list. Values may include Serial Wrap , Serial 1 Wrap , Serial 2
Wrap, or Serial 3 Wrap . Each time the test finishes, the screen updates with the result. P and F represent the
same numbers for DRAM. If the test passes, the Pass Count increases by 1. However, if the test fails, one of the
following failure messages appears for approximately three seconds, and the Fail Count increases by 1:
Receive Status Interrupt Error
Status Error
Receive Data Interrupt Error
Transmit Data Interrupt Error
Transmit Empty Error
Threshold Error
Receive Data Ready Error