Dell 5210n Mono Laser Printer, Service Manual, Page: 179 / 430

Diagnostic aids
3-7
HARDWARE TESTS
Select the following Hardware Tests from this menu:
•
Panel Test
•
Button Test
•
DRAM Test
•
ROM Memory Test
•
Parallel Wrap (if available)
•
Serial Wrap (if available)
Panel Test
This test automatically toggles each pixel of the operator panel 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, an
X
appears on the corresponding diagram. When you release the button, an X disappears. Pressing
Back
( ) o r
Stop
( ) cancels 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:
1.
Select
DRAM Test
from the menu.
The message DRAM Test Testing… displays. Then the message Resetting Printer appears, and the
power indicator light
blinks
red.
2.
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 is incremented. 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, press
.
DRAM Test xxx MB
P: ###### F: ####