Read Sharp AM-300 (serv.man5) Service Manual online
AM-300DE
5 – 10
2.2.3 Signal assignment to the Printer CPU pins
Control unit
Mechanism control CPU
Description
Signal
Pin No.
OA-2000 I/F
/STS
TXD
Video I/F signals to/from the main CPU (OA-2000)
/SCLK
SCK
/CMD
RXD
/PCURES
RESET
/DCRDY
GPO
/DREADY
GPO
/EPRDY
GPO
/VSYNC
GPO
/CPRDY
GPI
/DPAGE
GPI
/DSRDY
GPI
LSU
APC_AUTO
TMOV
APC timing generation signal for line cycle
/SYNC
TRGV
Laser main scanning sync signal
IRQ
PMCLK
FTIOA1
Polygon motor clock
LDEN
GPO
Laser circuit driving signal
PMD
GPO
Polygon motor driving signal
/LASERON
GPO
Laser on
SAMPON
GPO
APC circuit sample signal
SYN_LON
GPO
Next line laser on (SYNC)
High voltage
PWM0
FTIOB0
Clock for high voltage control clock PWMSIN
PWM1
FTIOC0
Clock for high voltage control clock PWMSIN
PWM2
FTIOD0
Clock for high voltage control clock PWMSIN
/PWMINT
IRQ
Timer setting change interrupt
MCON
GPO
Charge control
TC/BSON
GPO
Transfer/DC bias control
Sensor
/PIN
GPI
Main unit paper feed detection (Paper-In)
/POUT1
GPI
Paper eject detection (Paper-Out/fusing section)
/POUT2
GPI
Paper eject detection (Paper-Out/exit roller section)
PE_BY
GPI
Detection of paper presence in the bypass tray
OPEN_TRAY
GPI
Tray cover open/close detection
/DOP
GPI
Door open/close detection (front and right doors)
/CAMSW
GPI
Cam home position detection
/ROLSNS
GPI
PU roller rotational position detection
TCT2
GPI
Toner cartridge identification
(Destination and initial toner charge)
(Destination and initial toner charge)
TCT1
GPI
TCT0
GPI
Fusing
RTH
AN
Thermistor analog input (temperature detection)
HLON
GPO
Heater lamp ON/OFF control
Main motor
/MEN
GPO
Excitation enable
/MMRES
GPO
Reset input (Home State)
STEP
FTIOA
Step clock
Pickup motor
PUMA
GPO
Excitation phase A
PUMB
GPO
Excitation phase B
/PUMA
GPO
Excitation phase /A
/PUMB
GPO
Excitation phase /B
Fan
VFM
GPO
Fan ON/OFF control
Power supply
/ZC
IRQ
AC zero-cross signal input
PWRLY
GPO
Power relay ON/OFF signal
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