Dell 5110cn Color Laser Printer Service Manual - Page 190

Chapter 2 Operation of Diag. 4.1.5 EEPROM Test The test performs read/write/verify of the test patterns (0xff,0xaa, 0x55 and 0x00) on one byte at every 0x400 from the first address of EEPROM. Normal CHECK OK Error EEPROM ID* ERROR (ID*:1,2) 4.1.6 DRAM Test When the optional DRAM SIMM is checked and found, it checks the optional memory area. First, the test performs read/write/verify of the increment data for the whole tested area by the word. Then, it performs read/write/verify of the test patterns (0xffffffff, 0xaaaaaaaa, 0x55555555, 0x00000000) for the whole tested area by the word. Normal CHECK OK Error DRAM slot* ERROR (*ɿ0,1) 2 - 12