Block Diagram; Power Supply Circuit - Casio SF-7900E Service Manual & Parts List

BLOCK DIAGRAM

C0~C63
KEYBOARD
PCB-L589-E4
TO KEYBOARD
SF-7900E: RAM × 1
SF-8900: RAM × 2
LCD
96 × 64 dots
S0~S15
LCD DRIVER
MSM6585AV
-Z-358B
DATA BUS
CPU
HD62076C03
LSI1
ROM
(Operation Program)
LSI5
RAM
MSM51008AFP-10LL
LSI3, LSI4
— 8 —
CD760-TS
S16~S95
LCD DRIVER
MSM6585AV
-Z-358B
LCD DRIVE
VOLTAGES
V1 ~ V5
VDD
OPEN (OFF)
LOCK (ON)
MAIN SWITCH
GND

Power supply circuit

GATE ARRAY
SSC2571
LSI2
INTERFACE FOR
DATA TRANSMISSION
& DATA RECEPTION
PCB-L589-E2
PCB-L522-1(SF-7900E)
or
PCB-L552-1(SF-8900)