4-14 Phaser 6180MFP Multifunction Printer Service ManualGeneral TroubleshootingService Diagnostics TestsService Diagnostic Tests and UtilitiesPrinter Diag Test TableTest Control Panel Display Test DescriptionESS Diag Tests memory devices on the Controller.All Test All Test■ Start■ Processing■ Check OK■ ***ERRORTests all Controller Diag tests exceptfor the MAC+PHY and Control Paneltests.CodeROM Test CodeROM Test■ Start■ Processing■ Check OK■ CodeROM#* ERROR■ S=xxxx V=yyyyCalculates the ROM checksum chip bychip and compares it with the valuestored in the CodeROM itselfbeforehand.When the checksum is identical to thestored value, this test determines thechip is normal.Note: Run this test when error 116-317occurs.FontROM Test FontROM Test■ Start■ Processing■ Check OK■ FontROM ERROR■ S=xxxx V=yyyyCalculates the Font ROM checksumchip by chip and compares it with thevalue stored in the FontROM itselfbeforehand.When the checksum is identical to thestored value, this test determines thechip is normal.Note: Run this test when errors 116-310 and 116-311 occur.EEPROM Test EEPROM Test■ Start■ Processing■ Check OK■ EEPROM ID* ERROR(*:1,2)Performs write/read/verification of thetest patterns (0xff, 0xaa, 0x55, and0x00) on one byte at every 0x400 fromthe first address of EEPROM.Note: Run this test when errors 116-323, 116-324, and 116-327 occur.DRAM Test DRAM Test■ Start■ Processing■ Check OK■ DRAM slot* ERROR(*: 0,1)Tests Open/Short with the address lineof the DRAM, and performs write/read/verification on the entire DRAM. Whenthe optional DRAM SIMM is checkedand found, it checks the optionalmemory area.Note: Run this test when errors 116-315,116-316, 116-318, 116-332, and116-335 occur.
