Ricoh PRIPORT VT 2000 Series Service Manual page 79

28 February '91
2.11 MAKE-UP MODE: VT2500 only
2.11.1 Overall Operation
MTF
DATA
P.
Image
DATA
Processing
Circuit
S
CN402-31
CN402-32
CN402-33
CN402-34
4
CN402-35
CN402-36
CN402-37
BCD
CN402-38
CN402-39
CN402-40
CN402-41
CN402-42
CN402-45
Main Board
The command sheet is read twice as fast as the original. The command
data is converted in the A/D converter and is modulated in the image
processing circuit. The modulated command data is reduced to 1/64 and
stored in the area memory. The area memory stores the command sheet
area data as area solid fill data.
The image data read by CCD is also converted and is modulated. The
modulated image data, the stored command area data, and the background
pattern are edited in the editing circuit of the make up control board
according to the editing command.
The edited image data is sent to the thermal head control board through the
image processing board.
When the make-up mode is not selected, the modulated image data that
was sent to the make-up control board is returned to the image processing
board without any processing.
Make Up
Mode
MTF DATA
Make Up
Mode
M DATA
Normal
Closed/
Processing
Diagonal
Mode
Pattern 0
Pattern 1
Pattern 2
Pattern 3
Selector
Pattern 4
4
Pattern 5
Pattern 6
2/4 mm
S
BCD 1
Make
BCD 2
Up
Mode
BCD 4
BCD 8
Thermal Head
Original Image Data
Command Sheet
Image Data
M. DATA 2
Image Processing Board
2-52
Area
Reduction
Processing
Circuit
Memory
2 mm
Pattern
Selector
Generator
4 mm
Edited Image Data
Image
Edit
Circuit