Service manual

IMAGE PRINTING
SM 2-3 B358
Detailed
Descriptions
2.2 IMAGE PRINTING
The printer controller receives the print data from the computer through the parallel
or network interface port. The co-processor handles the image data but it only
makes a raster image. All image processing, such as edge smoothing and toner
saving, are done in the base engine.
The image data from a PC goes to the buffer in the resident RAM. Then, it goes to
the co-processor. The co-processor selects the printer language automatically,
then the co-processor generates the print data to match the selected printer
language. After generating the print data, the co-processor sends it to the LD unit
through the IPU on the BICU board. At that time, the data is also sent to the hard
disk for multiple printing and sorting, as well as backup in case of paper jams.
NIB
DRAM SIMM
MSU
HDD
Co-processor
CPU
Resident
RAM
IPU
Parallel Interface, from PC
FCI
GAVD
LD Unit
BICU
Printer Controller
B358D502.WMF
Intelligent
Personality
Selection
PCL-5e
PCL-6
Post
script
Image Data
Generation
Resident
RAM
DRAM
SIMM
IPU LD
MSU
NIB
Parallel
Buffer
Co-processor
Base EnginePrinter Controller
BICU
HDD
B358D503.WMF