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ICU PWB
Print data from the host (PC) are developed by the ASIC and the line
memory (DRAM) to converted into full dot image data, which are then
outputted to the data select section in the MCU PWB. The machine
status data from the MCU PWB are outputted tot he host (PC). In
addition. the ASIC controls the parallel I/F.
Operation PWB
Status data from the MCU PWB are converted into the lamp and
lamp display by the display controller. The key operations are con-
verted into key data signals and outputted to the MCU (PCU) PWB.
High voltage power PWB
This PWB supplies the high voltage used in the image process sec-
tion. (Main charger, developing bias, transfer charger) It also includes
the driver for the main motor. The power output is controlled by the
control signals from the MCU (PCU) PWB.
Copy lamp control PWB
The copy lamp light quantity is controlled so that the necessary quan-
tity of light is provided even when conditions of the scanner (reading)
section are changed.
The copy lamp drive voltage is controlled by the output level of the
light quantity sensor in the scanner (reading) section. Control is made
with the control signals from the MCU (PCU) PWB.
Power PWB
The power PWB outputs DC power voltages (+24V, +5V, +3.3V,
+12V) and drives the heater lamp.
CN11 CN12 CN14
CN10
CN6
CN5
CN4CN1
CN2
CN7
CN13CN9CN8
IC5
CPU
H8S/2350
IC8
ASIC
HG73C025FD
IC13
IC112
MRMT0~3
MHPS_IN
CLCNT
PSIZE_IN
TS_IN
VFMOUT
RTH_IN
PSIZE_IN
CCDOUT
f1,f2,
SH-,RS,
SP,CP
PMCLK
PMD-
PEMP_IN
VDATA
DSRDY-,RESERR-
DPAGE-,VIDEO
VSYNC-,PRSTT
RESET,DREADY-
DCRDY-,ERROR
SCLK,SYNC
PIN_IN-
FW
MEN-,MMT0,1
MCON,HL,TC/BIASON
PUS,PR,PWMSIN
OPPSW
OPKIN1,2
OPCLK,OPLATCH
OPDATA,SELIN1,2,3
MCU PWB BLOCK DIAGRAM
SCANNER
MOTOR
CCD PWB
INVERTOR
PWB
THERMISTOR
OPERATION PANEL
FAN MOTOR
HIGH VOLTAGE PWB
TONER
SENSOR
LSU PWB
LASER
POLYGON
MOTOR
ICU PWB
PAPER
EXIT
SENSOR
HOME
POSITION
SENSOR
PAPER
SIZE
SENSOR
PAPER
EMPTY
SENSOR
CN202
CN201
IC201
DRAM
CN203
MCU
PWB
ICU PWB
IC202
GATE ARRAY
TO PC
TO PC
OPERATION PWB BLOCK DIAGRAM
CN-901
KEY SWITCH
LAMP, VALUE DISPLAY LED
DISPLAY CONTROLLER (DRIVER)
IC901
DECODER
IC902
MCU PWB
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