Read Sharp AM-300 (serv.man5) Service Manual online
AM-300DE
5 – 9
This printer CPU executes the print action in accordance with the com-
mand from Main controller. Printer CPU controls each component of
Laser Beam Printer (LBP) as follows.
mand from Main controller. Printer CPU controls each component of
Laser Beam Printer (LBP) as follows.
1) Main Motor control
2) Pickup Motor control
3) Fuser control
4) High Voltage Generator control
5) Laser Scanning control
6) Sensor monitor
7) Communication with Main controller
2.2.2 Signal connection
Fig. 6
Limit Temp.
Heater
Lamp
drive
circuit
DRV
WRLY GPO
AN0
RTH
FUSER
Thermister
DRV
HLON GPO
/ZC
IRQ0
GPO
VFM
DRV
FAN
GPO
/MEN
MA+
STEPPER
MOTOR
GPO
/MMRES
Motor
Driver
MA-
MB+
FTIOB STEP
MB-
5V Tolerance Buf.
GPO
DIR
RX_DATA
/STS
TXD_3
GPI
/DOP
+24V
R-COVER
(F-COVER)
SCLK
/SCLK
SCK3_3
TX_DATA /CMD
RXD_3G
PI
TRY OPEN
TORAY
GPI
PE BY
BYPASS
TORAY
GPO
/CPRDY
GPI
GPO
/DSRDY
GPI
GPO PUMA
DRV
STEPPER
MOTOR
for Paper
Pickup
GPO
/DPAGE
GPI
GPO PUMB
DRV
3.3V->5V TRANS.
GPO /PUMAD
DRV
PB_DATA D7~5
EPRDY GPO
GPO /PUMBD
DRV
Buffer
/DCRDY GPO
GPI
/CAMSW
CAM SW
5V
Tolerance
/DREADY GPO
GPI
/ROLSNS
PU ROLLER
SENSOR
GPI
/POUT1
P_OUT
from FUSER
GPI
/POUT2
P_OUT
5V Tolerance Buf.
from ROLLER
PAGE_SYNC
/VSYNC GPO
Remove chattering
GPI
/PIN
P_IN
GPI*3
TCT2~TCT0
Toner C/T
GPO
PCURES
/PCURES
RES
DETECT SW
GPO
TC/BIASON
HIGH
VOLTAGE
PWB UNIT
GND
GPO
MCON
OSC1
FTIOB0 PWM0
20MHz
PWMSIN
OSC2
FTIOC0 PWM1
PWMSIN
Generation
Circuit
APC_AUTO
TMOV
FTIOD0 PWM2
SYNC_LON
GPO
IRQ1/
PWMINT
/LASERON
GPO
GPO
LDEN
LDEN
OPTICAL
UNIT
(LSU)
/SAMPON
GPO
FTIOA1 PMCLK
/PMCLK
PMD
GPO
IRQ2
/HSYNC
TRGV
GPI
/PMRDY
/PMD
PIXEL_DATA
VIDEO IN
VIDEO
/VIDEO
SAMP
/S_H
LINE_SYNC
5V Tolerance Buf.
Laser
Timing
Circuit
COMP
COMP
LATCH
F.F.
POWER SUPPLY
PWB UNIT
5 V Logic
5 V/24 V Control
3.3 V Logic
OA-2000
(OASIS)
16bit
MICROCOMPUTER
HD64F36049
LBP
ENGINE
Open
Open
Collector
Collector
Open
Collector
Open
Collector
Collector
Open
Digital
Transistor
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