Chapter 7. Circuit Description - Sharp UP-3300 Service Manual

CHAPTER 7. CIRCUIT DESCRIPTION

1. Hardware block diagram
Drawer x 2
DRIVER +24V
DRIVER +24V
IR
RS232 x 2
DRIVER/
RECEIVER
SRN
PRINTER
VRAM
TOUCH
PANEL
(DRAM 512K)
CONTROLLER
LCD
640 x 480 dots
CPU
H8/510
MPCA8
OPC2
VGA
CONTROLLER
MN89303A
BRIGHTNESS
CONTROL
VOLUME
INVERTER
CONTRAST
ADJUSTMENT
VOLUME
7 – 1
FLASH
ROM
2MB
PSEUDO
SRAM
1MB
SW
VFD CONTROLLER
CKDC9
POWER SUPPLY FOR
VACUUM FLUORESCENT
TUBE
VCC
EXT.SLOT
(80pin x 2)
RAMCN
(72pin)
CUSTOMER DISP.
+24V
POWER SUPPLY