Brother HL-2400C Series, Service Manual

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VIII-11
4.1 Video Controller Mode
Table 8-4-1
Service Call Message Meaning Countermeasure
61 PROG ERROR
Program ROM checksum
error Replace with a new ROM.
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.
Table 8-4-2
Service Call Message Description
99 SERVICE C3
NVRAM Error (MCTL PCB)
99 SERVICE C4
Engine Controller MCTL PCB Hardware Error
99 SERVICE C7 Process Timing Clock Error (Main Motor Clock Error)
99 SERVICE D1
Clutch Error of the Yellow Developing Unit
99 SERVICE D2 Clutch Error of the Magenta Developing Unit
99 SERVICE D3
Clutch Error of the Cyan Developing Unit
99 SERVICE D4 Clutch Error of the Black Developing Unit
99 SERVICE D5 HPSI Signal Error (Retract Error of Black and Yellow Toner
Cartridge)