Lexmark C750 Service Manual - Page 204

5060-00x DRAM Test This test checks 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 Test: 1. Select DRAM Test from the menu. The power indicator blinks indicating the test is in progress. 2. Press Return or Stop to exit the test. DRAM Test 128M P:###### F:##### 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 turns on solid, and the final results appear. If the test fails, DRAM Error appears for approximately three seconds and the failure count increases by 1. CACHE Test The CACHE Test is used to verify the processor cache is functioning properly. 1. Select CACHE Test from the menu. The machine initiates a POR of the printer and the following screen is displayed: Resetting the Printer Upon completion of the POR the following screen is displayed: Cache Test x100 P:###### F:###### P:###### represents the number of times the cache test has passed, finished successfully. Initially 000000 is displayed. The maximum pass count is 999,999. F:###### represents the number of times the cache test has failed, finished with errors. Initially 000000 is displayed. The maximum fall count is 999,999. To exit the test, turn the printer off. 2. 3-20 Service Manual