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Dram Test; Usb Hs Test Mode - Dell 5230dn Mono Laser Printer Service Manual

Service manual.
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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. Touch
to 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:
DRAM Test <###
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.

USB HS Test Mode

1. Select USB HS Test Mode from HARDWARE TESTS.
2. Press
until the
3. Select the desired Test, and then press
Port
Test
Port 0
Test J
Test K
Test SEO NAK
Test Packet
Test Force Enabled
Port 1
Test J
Test K
Test SEO NAK
Test Packet
Test Force Enabled
Port 2
Test J
Test K
Test SEO NAK
Test Packet
Test Force Enabled
Port 3
Test J
Test K
Test SEO NAK
Test Packet
Test Force Enabled
P:######
F:####
appears next to the Port to be tested, and then press
.
Appears on the display
Certification Testing...
Certification Testing...
Certification Testing...
Certification Testing...
USB High Speed
USB High Speed
USB High Speed
USB High Speed
.
3-37
Diagnostic aids

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