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Hardware Tests; Dram Test - Dell 2330d - Laser Printer B/W Service Manual

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Hardware tests

This setting contains the following tests:
Press
or
LCD Test
Once the LCD Test setting is selected, the printer automatically performs the operator panel test. This test
toggles each pixel in the operator panel through every contrast level, beginning with the darkest and ending with
the lightest. Once the pixels are toggled, the backlight of the operator panel comes on, and then goes off. Non-
functioning pixels will appear as blank spaces during the test's darker stages. Press
LCD Test. Once the test is canceled, the display returns to the initial Hardware Tests screen.
Button Test
The Button Test verifies the operation of each button on the operator panel. Press
from the HARDWARE TESTS menu. All of the buttons and the backlight illuminate, and PANEL TEST Press
Count: 0 displays. Press
count does not match the total number of buttons that are pressed, then one or more buttons are malfunctioning.
Press
to return to the HARDWARE TESTS menu screen.

DRAM Test

The purpose of this test is to check the validity of DRAM, both standard and optional. The test writes patterns of
data to SDRAM to verify that each bit in memory can be set and read correctly.
To run the SDRAM Memory Test:
1.
Select DRAM Test from the menu. The power indicator blinks, indicating the test is in progress.
xxxMb represents the amount of installed DRAM memory in MB.
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, 00000
displays with the maximum fail count being 99,999.
2.
Once the maximum pass count or fail count is reached, the test stops, the power indicator is turned on
solid, and the final results display. If the test fails, then the message DRAM Error displays for approximately
three seconds and the failure count increases by 1.
3.
To stop the test before it completes, turn off the printer.
3-8
LCD Test
Button Test
DRAM Test
to scroll through the Hardware Tests menu, and then press
,
, or
to increase the value of the Press count field by one. If the final Press
DRAM Test
P:######
xxxMb
F:#####
to select the desired test.
anytime to cancel the
to select the Button Test

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