Block Diagram - Casio SF-4300A Service Manual & Parts List

5. BLOCK DIAGRAM

TAB Ass'y
L571-1 Ass'y
Contrast
VDD2
LCD
Voltages
switching
circuit
VCC
LCD
SF-4300A LD-B8272AY
SF-4600 CD408-TS
V1~V5
NM360
LCD diriver
CPU
µPD3056G-007
VDD1
SW, ISW
ON
VDD
S-81250 XC61AN
HG-RD 6302PR
Power Supply
Battery
(CR-2032 X 3)
CONTRAST V1
Max.(V)
Min.(V)
Data Bus
Address
Bus
P1 P0
OFF
Tx
Rx
GND
— —
9
V2 V3 V4
1.5 3.0 5.5 7.0
1.0 2.0 4.0 5.0
RAM
µPD43257AGU
-10/12LL
RAM
µPD43257AGU
-10/12LL
KAC,
K1~K14
KEYBOARD
Jack
V5
8.5
6.0