Hardware Tests - Oki MB 780 Service Manual

HARDWARE TESTS

Select the following Hardware Tests from this menu:
• Panel Test
• Button Test
• DRAM Test
• USB HS Test Mode
Panel Test
This test automatically toggles each pixel of the touch screen through every contrast level
beginning with the darkest and on to the brightest. This test continues until you press Stop
Button Test
The Button Test verifies the operation of the buttons on the operator panel. When you
select Button Test, a diagram of the operator panel appears on the panel. When you press
a button on the operator panel, the corresponding touch screen key is emphasized. Touch
Back to cancel the test.
DRAM Test
The purpose of this test is to check the validity of DRAM memory, 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:
Touch
•
The message DRAM Test Testing... displays. Then the message "Resetting Printer"
appears, and the power indicator light blinks red.
Turn the printer off and on. While the DRAM test executes, the power indicator
•
blinks green. The following type of message appears:
• xxx represents the installed DRAM size.
• P:###### represents the number of times the memory test has passed and finished
successfully. Initially 000000 displays with the maximum pass count being
999,999.
• F:##### represents the number of times the memory test has failed and finished
with errors. Initially 0000 displays with the maximum fail count being 99,999.
Initially only four digits appear, but additional digits appear as needed.
Each time a test is completed, the number of pass and failures increments. If the test fails,
the message Failure displays for approximately three seconds, and the failure count
increases by one.
The test continues until all standard and optional DRAM is tested. Once the maximum
pass count or fail count is reached, the test is stopped, the power indicator is turned on
solid, and the final results display.
To stop the test before completion, turn the MFP off.
to select DRAM Test from the menu.
DRAM Test <### P:###### F:####
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