Circuit Explanation; Block Diagram (Main Pcb E580-1) - Casio QT-2000 Service Manual

5. CIRCUIT EXPLANATION

5-1. Block diagram (MAIN PCB E580-1)

MASS memory
control
IC36
GA4
IC35
IC43
4M
SRAM
1M
SRAM
IC33
IR I/F
UART
COM3
Modem
COM2
Printer
LCD display
IC26
Display
controller
IC20
Video RAM
IC39 IC31
1M
1M
SRAM
EP ROM
IC32
GA3
COM1
Scanner
— 18 —
IN-LINE
ARCNET
IC10
ARCNET
Controller
IC11
GA2
IC12
IC22
GA1
16M F-ROM
IC23
2M SRAM
IC6
CPU
Drawer
Keyboard
Kitchen
Printer
Slip
Printer
Back
Display
Remort
Display