Main Pcb - Kyocera KM-1650 Service Manual

2DA/2DB-1
2-3-2

Main PCB

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