Specifications

Color Inkjet Printer JV33-130/160
5-6
5-2. Circuit Board Specifications
5-2-1. Main PCB
 Board name: Main PCB assembly (E104853)
 The CPU is SH-3 (RISC, 133MHz) made by Hitachi.
 A program for the CPU is written in flash memory. Version up of this program is easily executed on
site through I/F.
The CPU downloads the version up to PRAM to execute writing in the flash memory.
 When receive data is read, The CPU writes the data in picture memory. After execution of required
processes by PDC-CTR, the data is transmitted to the HDC with 8 bit width.
Receiving the data, the HDC creates driving COM signals for head and nozzle data, and transmits each
data to the ink slider PCB via HDC FPC cable.
 X, Y-axis motor driving circuit and other IO circuits are also included.
<Block diagram around main PCB>
Fig.5-3
Main PCB
CPU
SH-7790S
131MHz
RTC
&Batt.
Power
source
+42V
+24V
+5V
+3.3VSB
+5VSB
PDC
PLL
24.576
MHz
X motor
Y motor
USB
M66592
PDC+IOC
EP2C20F484C8N-NW
DMA 8
16
16
Flash
ROM(4MB)
32Mb
32
16
PRAM
PCB
SDRAM
256Mbx4
(x8)
(512Mbx8)
32
8
X-Z relative
XTAL
8.192
MHz
Station
4
4
)
16
FW debug
Serial I/F
Heater
control
X-axis
motor relay
G/A
servo
adjust
jig
HDC
XC3S1500-
4FGG456C
OSC
40
MHz
XTAL
24MHz
PDC PLL
40MHz
SDRAM
32MB
Regenerative
resistance PCB
Debug board
Flash-
ROM(4MB)
32Mb x 2
Keyboard
Servo G/A
E300411
80MHz
40MB/s
(MAX)
DMA 32
66MB/s(MAX)
33MHz
Extension
IF
IF
connection
board
32
SRAM
16Mb x 2
(BGA)
80MHz
(BGA)
SDRAM
256Mbx4
(x8)
(512Mbx8)
PRAM
PCB
Slider