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SHARP SERVICE MANUAL JX8200SM [13] ELECTRICAL SECTION
NAME
TDCAS_
Transfer drum cleaner clutch solenoid drive signal (Drive at LOW)
TDON_
Transfer discharger ON signal (The transfer discharger voltage is outputted at LOW.)
TDPOS
Transfer drum home position sensor signal (Detection at HIGH)
VIDEO_
Video signal (Bit image data signal)
VSYNC_
Vertical sync signal (VSYNC) ICU sends print data according to the timing of this signal.
(Outputted for every sheet of print.
WDTO_
Watch dog timer monitor (LOW when the CPU is hung up to inhibit operations of the loads.)
(IC10 output is cut.)
WR_
Light strobe signal
WTBS_
Waste toner bottle sensor (Detection of full or waster toner bottle installation) detection
signal (LOW: waste toner bottle installed/waste toner bottle is not full)
YBSON_
Developing bias ON signal (Yellow) (At LOW, developing bias voltage is outputted.)
YDSEN
Toner concentration sensor detection signal (Yellow) (The output voltage is inversely
proportional to toner concentration.)
YMAGC_
Developing clutch drive signal (Yellow) (Drive at LOW)
YTCONS_
Toner supply clutch solenoid drive signal (Yellow) (Drive at LOW)
3. Video I/F
A. Print data flow block diagram
PCU
DATA LINE
CPU
LEND
GATE ARRAY
PRSTT
LDON
VIDEO
SYNC
LASER
LASER DIODE
SENSOR
MIRROR
SCANNING UNT
DESCRIPTION
PRINT(DATA)
HSYNC
PAGE
ICU
PAGAK
VSYNC
VIDEO I/F
I/F
HOST COMP
13 – 38
B. Connection between ICU and PCU
READY
Controller
ICU
CBSY
(Interface Control unit)
ESS
PAGE
(Electronic Sub-System)
PAGAK
CRDY
SRDY
CMD
STS
HSYNV
VSYNC
DATA
RES
GND
+5V
SIGNAL KIND
DRIVE
CONTROL
SENSE
DATA (IMAGE DOT)
SYNCHRONOUS
MONITOR
STROBE
SENSE
CONTROL
SENSE (ANALOG)
DRIVE
DRIVE
Engine
6A
PCU(Process Control Unit)
6B
IOT(Image Output Terminal)
8B
5B
7B
7A
9B
9A
8A
10A
10B
5A
1A,2A,3A,4A
1B,2B,3B,4B
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