Kyocera KM-1650

2DA/2DB-1
2-3-4
2-3-2 Main PCB
Figure 2-3-3 Main PCB block diagram
The main PCB (MPCB) consists of mainly CPU (U56), program memory flash ROM (U23), work memory SDRAMs (U54,
U57), XIO (U49), image processing ASIC (U7), memory copy ASIC (U20), codec IC (U19), AFE (U3), LCD controller
(U17), EEPROM (U39), and RTC (U40).
Memory
copy
ASIC
(U20)
33 MHz
Image
processing
ASIC
(U7)
CPU
(U56)
Image data
LDOP
SAMPLEN
PLGCLK
VIDEO_PRT_N
OVSYNC
LDON
BDFAIL0
BDN
OUTPEN
Code data
AFE
(U3)
CCD
PCB
Network
scanner
Image memory
SDRAM
(YS1,YS2)
(YC12)
APC
PCB
Printer
board
PCB
Polygon
motor
Engine
PCB
Main PCB
XIO
(U49)
LCD
controller
(U17)
Operation
PCB
LCD
PCB
EEPROM
(U39)
RTC
(U40)
Analog
8bit
ADCLK
CCDCLK1-2
Serial I/O
Data bus
Address bus
IICSDA
IICSCL
IICSDA
IICSCL
8bit
PVSYNC
8bit
Work
memory
(U54)
(U57)
Buffer
Program
memory
Flash
ROM
(U23)
Codec IC
(U19)
VIDEO_PRT_P
LVDS
+5VAPC
Q1
Q2