Lexmark Optra S 4059 Series, Service Manual

Page: 143 / 347

Diagnostic Aids
3-10
4059-XXX
DRAM Memory Test
The purpose of this test is to check the validity of DRAM, 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 Memory Test:
1. Select DRAM Memory Test from the menu.
– The power indicator blinks indicating the test is in progress.
2. Press Return/Stop to exit the test.
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 of time the memory test has failed and
finished with errors. Initially 00000 displays with the maximum fail
count being 99,999.
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. If the test fails, the message DRAM Error, displays for
approximately 3 seconds and the failure count increases by 1.
ROM Memory Test
The ROM Memory Test is used to check the validity of the RIP code
and fonts.
To run the ROM Memory Test:
1. Select ROM Memory Test from the menu. P and F represent the
same numbers for DRAM.
– The power indicator blinks indicating the test is in process.
The test runs continuously.
2. Press Return/Stop to exit the test.