Circuit Description; Block Diagram - 1 (Image Processing) - Panasonic KV-S2045C Service Manual

KV-S2025C Series / KV-SU225C Series / KV-S2045C Series / KV-SU245C Series

11 CIRCUIT DESCRIPTION

11.1. Block Diagram - 1 (Image Processing)

CIS (Front)
LED Source
Image Sensor
CIS (Back)
LED Source
Image Sensor
STARTING POSTION
SENSOR Board
Starting Position Sensor
WAITING SENSOR
Board
Waiting Sensor
Option
(Only for KV-S2045C/
SU245C Series)
Imprinter
ENDING SENSOR Board
Ending Sensor
Paper Detector
As a scanning device, this product adopts color CIS (Contact Image Sensor) for each scanning side independently.
The color CIS has Red, Green, and Blue LEDs. Changing the three colors enables it to scan color data.
Scanned data (Analogue) from the color CIS is transmitted to CONTROL Board via RELAY (FRONT) Board and RELAY (BACK)
Board.
The digital data, converted from analogue by A/D Conv. on the CONTROL Board, is processed according to the following protocol.
Note
· A/D Conv. for KV-S2045C/SU245C Series: IC1003 to IC1006
· A/D Conv. for KV-S2025C/SU225C Series: IC1003
1. In Case of KV-S2045C Series
a. Based on white standard data memorized in Shading Memory (IC1505, IC1506, IC1508, IC1509) in advance, Gate Arrays
(IC1501, IC1502) process the data from the A/D Conv. to do shading correction for each side independently. (IC1501: For
front side, IC1502: For back side)
After that, the Gate Arrays process Gamma transformation with the shading data.
b. The gamma data is arranged to each line data, and is memorized in Line Buffer Memory (IC1504, IC1507: Mounted only
for KV-S2045C Series) by the Gate Arrays.
c. The Gate Arrays process dpi transformation with the line data read from the Line Buffer Memory.
After finishing this process, the transformed data is written in SDRAM (IC1510, IC1511).
d. The Gate Arrays process MTF correction with the dpi data read from the SDRAM. And after that, the Gate Arrays write the
MTF data in the SDRAM, again.
RELAY (FRONT)
CONTROL Board
Board (1/2)
Relay
Circuit
RELAY (BACK)
Board
LED Driver &
Relay Circuit
Line Buffer
Memory
1
RELAY (FRONT) (* IC1504, IC1507)
Board (2/2)
Shading Memory
IC1505, IC1506
1
(* IC1508, IC1509)
SDRAM
1
IC1510 (*
Relay Circuit
+3.3V, +5V,
+12V, +24V
A/D Conv
IC1003 (* 1 IC1004,
IC1005, IC1006)
Gate Array
IC1501
1
(* IC1502)
2
*
SCSI
Controller
IC1030
IC1511)
CPU
IC1035
Motor
ROM
Driver
IC1040
SRAM
IC1041
80
POWER Board
AC Inlet
DC Power
Power Switch
Door Swirch
Motor
Conveyor
Driver
Motor
Note:
" " mentions image processing flow
from CIS to PC.
(* 1 ....): Only for KV-S2045C/SU245C Series
(* 2 ....): Only for KV-S2025C/S2045C Series
* 2
SCSI Connector
CN1004, CN1005
Paper Feed
Motor
Dip Switch
LED Board