Engine Control Board (K7N Pwb) - Oki C9500dxn Maintenance Manual

2.2

Engine Control Board (K7N PWB)

OPTION TRAY
PAPER THICKNESS
SENSOR
COROR REGISTRATION
SENSOR
HEAT ROLLER TEMP
OHP
TEMPATURE
HUMIDITY
HEAD TEMP
DENSITY
COVER OPEN
(UPPER, STACKER, RIGHT SIDE)
1ST TRAY SENSORS
(PAPER END, PAPER NEAR END)
PAPER FEED SYSTEM SENSORS
(PAPER FEED, PAPER
REGISTRATION, EJECT)
MT SENSORS
(STAGE POSITION, PAPER END)
DUPLEX
DISPOSAL TONER SENSOR
The engine control block (PU) is controlled by the engine control board (K7N PWB) which consists
of a CPU (MSM66Q577), general LSI chip (DCON, MCON), flash ROM, EEPROM, SRAM,
SDRAM and pulse motor drivers (see Figure 2.3).
(1) CPU
This, a 16-bit CPU with an AD converter (OKI MSM66Q577), controls the entire system.
(2) DCON LSI
This LSI (UPD65454GD-241-LML, UPD65946GD-137-LML), which is contained in the
printer engine control block, incorporates 16 megabits of video memory and has functions
such as engine-controller interfacing, LED interfacing, video memory control, main scan color
misalignment correction and skew correction.
41956001TH Rev.1
28MHz
ANALOG
SW
CPU
INT
MSM66Q577
CLK
RESET
PAPER SIZE
STACKER FULL
CU
SDRAM
SDRAM
Figure 2.3
FLASH
SRAM
EEPROM
CONTROL
PANEL
MOTOR
DRIVER
PULSE
MOTOR *9
MOTOR
DRIVER
GEARED
MOTOR
MCON
CLUTCH
LSI
PU FAN
FUSER FAN
ID, BELT,
FUSER
CHECKS
HIGH VOLTAGE POWER
SUPPLY SERIAL INTERFACE
32MHz
CLOCK
GENERATOR
LED HEAD (K)
LED HEAD (Y)
DCON
LED HEAD (M)
LSI
LED HEAD (C)
Oki Data CONFIDENTIAL
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