Ricoh PRIPORT VT 2000 Series Service Manual page 76

P.LYNC
1st
1 128
SIN 1
129
SIN 2
257
SIN 3
385
Image
SIN 4
513
Data
SIN 5
641
SIN 6
769
SIN 7
897
SIN 8
CK 1
128P S
CK 2
CK 3
CK 4
LATCH 1
LATCH 2
LATCH 3
LATCH 4
ENL 1
ENL 2
ENL 3
ENL 4
1. When the clock signals (CK1 -- 4) enter the thermal head drive control
board, the 1024 pixels of image data are input into the shift register.
When the latch signal enters to the control board, the image data is
sent from the shift register to the latch in parallel.
2. Above operation is performed again.
3. The image processing operation is performed when the ENL signal is
low.
The image data of the (1024 pixels each) main scan line is divided into
4 blocks.
4. The image signal for the preheat is sent to the thermal control twice.
The first image signal responds to the first half of ENL low signal , and
the second image signal responds to the later half of ENL low signal.
2nd Pixel No.
1 128 1025
129
257
385
513
641
769
897
128P S
1 line
1025 2049
2-49
2049 3093
28 February '91
4096 5120
3093