Canon LBP-1260 Service Manual page 90

b. Controller serviceman call
Indication display
Description
Internal ROM checksum error
The contents of the ROM on the video
controller are Incorrect.
Internal RAM error
Data cannot be correctly read from or
written to the DRAhl located on the
video controller.
NVRAM error
Data cannot be correctly read from or
written to the NVRAM (EEPROM) located corrected. replace the
on the video controller.
Extended interface error
The reponse from the extended Interface
PCB is not Input to the video controller
If the /PRNT signal is false, the /VSREQ
to the vtdeo controller PCB.
No /VSYNC signal
The /vsYNc signal is not output within
controller PCB receives the /VSREQ
Gate array internal SRAM error
Data cannot be correctly read fmm or
written to the SRAhJ in the gate array
IOP Internal ROM error
The contents of the IOP ROM are
incorrect.
Data cannot be correctly read from or
written to the IOP RAM.
Communication error between CPU and
The CPU cannot communicate with the
Interrupt error between CPU and IOP
The IOP does not generate a correct
Interrupt to the CPU.
CHAPTER2
Turn the power OFF and ON
replace the video controller
Turn the power OFF and ON
replace the video controller
Turn the power OFF and ON
EEPROM (IC 16).
Turn the power OFF and Oh
again. If the error cannot bc
corrected, replace the
extended interface PCB or
video controller PCB.
Turn the power OFF and Oh
corrected, replace the DC
controller PCB or video
controller PCB.
Turn the power OFF and
ON again. If the error
persists, replace the video
controller PCB.
Turn the power OFF and OP
corrected, replace the video
controller PCB.
Turn the power OFF and OP
again. If the error cannot bl
corrected, replace the vtdeo
controller PCB.
Turn the power OFF and OP
corrected, replace the video
controller PCB.
Turn the power OFF and OP
again. If the error cannot bl
corrected, replace the video
controller PCB.
Turn the power OFF and Or
again. If the error cannot b<
corrected, replace the video
controller PCB.