Ricoh A230, Service Manual, Page: 82 / 1134

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IMAGE PROCESSING
2-19
A230/A231/A232 SM
Image compression is done for both gradation modes (grayscale and binary picture
processing) and the compressed data is stored. However, there are limitations in
copy mode, depending on the memory capacity and the installed memory
components, as follows. DRAM is standard, but the SIMM and HDD are options.
Copy Mode
Gradation
Processing DRAM
(4 MB)
DRAM + SIMM
(4 + 8 MB)
DRAM + SIMM
+ HDD
(12MB+1.6 GB)
One-to-one Binary/Grayscale O / O O / O X / O
Multiple copy of
single page original Binary/Grayscale
O / X O / O X / O
Multiple copy of
multi-page original Binary/Grayscale
O / X O / O X / O
Duplex Copy Binary/Grayscale X / X O / X X / O
Sort Binary/Grayscale X / X O / X X / O
Image Rotation Binary/Grayscale O / X O / O X / O
Key:
O / O: Possible in both binary and grayscale mode if this equipment is installed
O / X: Possible only in binary mode if this equipment is installed
X / O: Possible only in grayscale mode if this equipment is installed
X / X: Not possible in either mode
Example: Multiple copy of multi-page original is impossible with greyscale
processing if only the DRAM is installed
Note that the SIMM is standard equipment for the A231 and A232.
Binary picture processing mode
The data which was treated with binary picture processing goes to the GA1 IC. The
data is first compressed and the compressed data is stored in the DRAM and
SIMM memory. When printing, the data from the DRAM and SIMM memory goes
back to the GA1 IC, where the data is decompressed and image editing is done
(e.g., image rotation, repeat image, combine image).