Lexmark MS312, Service Manual, Page: 166 / 343

•
F:#####
represents the number of times the memory test failed and finished with errors.
The maximum pass count is 999,999.
4
After the maximum pass or fail count is reached or when all the DRAM has been tested, the test stops and
the final results appear.
USB HS Test Mode
1
From the Diagnostics menu, navigate to:
Hardware Tests > USB HS Test Mode
2
Choose the desired port, and then choose the desired test.
Ports Tests
Port 0
Port 1
Port 2
Port 3
Test J
Test K
Test SEO NAK
Test Packet
Test Force Enable
Single Step Get Device
Single Step Set
Feature
3
To exit the test, POR the printer.
4
If the test fails, replace the failing USB cable.
Duplex Tests
Quick Test
The Duplex quick test determines if the top margin at the back of a duplexed page is set correctly. This test
prints a duplexed version of the Quick test page that can be used to adjust the duplex top margin. Use either
Letter or A4 paper.
To run the Duplex quick test:
1
From the Diagnostics menu, navigate to:
Duplex Tests > Quick Test
2
Choose any of the following:
•
Single—Prints a single Quick test page.
•
Continuous—Continuously prints the Quick test pages until X is pressed.
The printer attempts to print the Quick test page from the default paper source. If the default paper source
supports only envelopes, then the page is printed from Tray 1.
The Quick test page contains the following information:
•
Printer registration settings
•
Code levels
•
Alignment diamonds at the top, bottom, and each side
4514-330
Service menus
166