3-8 Printer Service Manual
5057-XXX
DRAM Test
The DRAM Test is used to check the validity of both the printer’s standard and optional DRAM. The test involves
writing 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 HARDWARE TESTS from the Diagnostics Menu.
2. Select DRAM Test. DRAM Test Testing... appears on the LCD, and then Resetting the Printer
appears. The printer automatically performs a POR.
The following type of message appears:
• 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.
To stop this test before completion, turn the printer off.
CACHE Test
This test is used to verify the printer processor cache.
To run the CACHE Test:
1. Select HARDWARE TESTS from the Diagnostics Menu.
2. Select CACHE Test. CACHE Test Testing... appears on the LCD, and then Resetting the Printer
appears. The printer automatically performs a POR.
The following type of message appears:
• P:###### represents the number of times the cache has passed and finished successfully. Initially
000000 displays with the maximum pass count being 999,999.
• F:##### represents the number of times the cache 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 passes and failures is incremented. If the test fails, the message
Failure appears for approximately three seconds, and the failure count increases by one.
The test continues until all of the printer processor’s cache has been tested. Once the maximum pass count or
fail count is reached, the test is stopped, and the final results display.
To stop this test before completion, turn the printer off.
DUPLEX TESTS
Quick Test
This test prints a duplex version of the Quick Test that can be used to verify that the correct placement of the top
margin on the back side of a duplex page. You can run one duplexed page (Single), or continue printing
duplexed pages (Continuous) until Stop is pressed.
DRAM Test 256 MB P:###### F:####
CACHE Test x100 P:###### F:####
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