Brother International HL-2400C Service Manual - Page 256

4.1 Video Controller Mode Table 8-4-1 Service Call Message Meaning Countermeasure 61 PROG ERROR Program ROM checksum Replace with a new ROM. error 62 FONT ERROR Font ROM checksum error Replace with a new ROM. 63 D-RAM ERROR D-RAM error Replace with a new SIMM. 66 NV-W ERROR NVRAM write error Replace with a new main (video controller) PCB. 67 NR-R ERROR NVRAM read error Replace with a new main (video controller) PCB. 68 NV-B ERROR NVRAM write/read error Replace with a new main (video controller) PCB. 60 SYSTEM ERROR System error Replace with a new main (video controller) PCB. 99 SERVICE 2 Instruction access error Replace with a new main (video controller) PCB. 99 SERVICE 3 error Replace with a new main (video controller) PCB. 99 SERVICE 4 Instruction bus error Replace with a new main (video controller) PCB. 99 SERVICE 5 Data bus error Replace with a new main (video controller) PCB. 99 SERVICE 6 Privileged instruction Replace with a new main (video controller) PCB. 99 SERVICE 8 Illegal instruction Replace with a new main (video controller) PCB. 99 SERVICE 9 No fpu Replace with a new main (video controller) PCB. Service Call Message 99 SERVICE C3 99 SERVICE C4 99 SERVICE C7 99 SERVICE D1 99 SERVICE D2 99 SERVICE D3 99 SERVICE D4 99 SERVICE D5 Table 8-4-2 Description NVRAM Error (MCTL PCB) Engine Controller MCTL PCB Hardware Error Process Timing Clock Error (Main Motor Clock Error) Clutch Error of the Yellow Developing Unit Clutch Error of the Magenta Developing Unit Clutch Error of the Cyan Developing Unit Clutch Error of the Black Developing Unit HPSI Signal Error (Retract Error of Black and Yellow Toner Cartridge) VIII-11