Sharp SF-1020 - ADU Circuit Description

(14) ADU circuit description
(1) ADU circuit block diagram
VH
SUB DC
PWB
VB
IC4
VD
1 2 3
2
DPFC DRRC
CLUTCH
DRRC DPFC
IC3
DRRC DPFC
3
DPHPS1
DPHPS2 DPED1
DPHPS1 DPHPS2 DPED1 SPPD1 DPOD DPTD DPED2
IC6
IC 1
CPU
H8/3292
D-TXD D-RES D-DTR
IC9
DO-D7
/PAM-OUT
/WH
DATA LUTCH
CLUTCH STEPPER DRIVER
2
PAM2/B PAM2 B PAM2/A PAM2 A
PAM2
STEPPER
PAM1
STEPPER
2
PAM1/B PAM1 B PAM1/A PAM1 A
IC2
STEPPER
DRIVER
DDM_PWM
D-RXD D-DSR
DPED2
PAPER SIZE AB ONLY
DPPD1 DPOD
IC5
A 0 - A 1 5
D
O
-
D 7
- R
D
DDM_DIR
Q1-
DDM_DIR DDM_PWM
IC8
DDM1 DDM2
DDM
1
DC MOTER
DRIVER
Q4
3
ROM
MAIN
DPTD
2 ADU SENCER
PWB
PWB
12 – 17