Signal List; Dc Controller - Canon LBP-CX Series Service Manual

C. Signal
list
1. DC controller 1/0 signals
Abbreviation Name Function
SC Status/Command message signal Status information (paper out, jam, etc.)
Abbreviation Name
Function
which the DC controller sends to the video
controller, or command information
(cassette feed specification, manual feed
(manual feed) specification, etc.) which the
video controller sends to the DC controller.
(bidirectional)
SCLK Status/Command message clock Clock signal for SC line
SC NON Scanner drive command Drives scanning mirror rotation
SCNRDY
Scanner ready signal
Indicates that the scanning mirror is motor
at the correct speed
TG Tachogenerator signal Generates a pulse signal proportional to main
motor speed (about 1.3 ms cycle)
TM(+)
Print counter drive command
Advances the electronic counter that registers
TM(-) total number of prints made
TPAN
Test pattern select signal
Selects a combination of the test patterns
TPBN
TSTPT Test print command Causes a test print to be made
TSTPTE Test pattern enable command Enables selection of test patterns by TP AN
and TPBN
VDO, VDO Video signal Provides image data for printing
VMSK Vertical mask command
Inhibits the laser beam from "writing" on
non-image areas (paper feed direction)
VSREQ Vertical sync request command Requests the video controller to send a TRUE
VSYNC to the printer
VSYNC Vertical sync pulse Indicates the beginning of a new page
ACP AC PULSE signal
Control power to the fixing roller heater using
a zero-cross circuit
BD,BD BEAM DETECT (HORIZONTAL SYNC)
Indicates the beginning of a new line
PULSE) signal
Indicates that command information (cassette
- -
COMMAND BUSY signal
feed specification, auxiliary feed (manual feed)
CBSY
specification, etc.) is being sent from the video
controller to the DC controller.
CEMP NO CARTRIDGE signal
Indicates no cartridge
CPRDY CONTROLLER POWER READY signal Indicates that power for the video controller
is ON
CPU SD
CASSETTE PICKUP ROLLER CLUTCH
Actuates SL3
SOLENOID DRIVE command
CSENSl DRUM SENSITIVITY IDENTIFICATION
Indicates drum sensitivity
CSENS2
signal
DBAC DEVELOPING BIAS (AC) DRIVE command
Switches on developing bias (AC)
DBDC DEVELOPING BIAS (DC) DRIVE command Switches on developing bias (DC)
DRMD
DRUM DRIVE command
Actuates Ml
DSADJ
PHOTODIODE SENSITIVITYent signal Adjusts sensitivity of photodiode that de
ADJUSTMENT signal measures laser intensity
FSRD
FIXING ROLLER HEATER DRIVE
command
Actuates Hl
FSRTH FIXING ROLLER TEMPERATURE signal
Indicates fixing heater temperature
HMSK
HORIZONTAL MASK command
Inhibits th. laser beam from "writing" on
non-image areas (cross feed direction)
HVPR
PRIMARY CORONA DRIVE command
Enables the primary corona
HVRST HIGH-VOLTAGE RESET signal Switches off transfer and primary coronarona
and developing bias
HVTR
TRANSFER CORONA command
Enables the transfer corona
LD
LASER DRIVE command
Drives laser output
LSRHD
LASER HEATER DRIVE command
Actuates the heater in the laser unit
LSRTH
LASER TEMPERATURE signal
Indicates laser chip temperature
MPUSD
MANUAL PICKUP ROLLER
Actuates SL2
SOLENOID DRIVE command
PD
LASER POWER SENSOR signal Indicates the laser power
PDP DELIVERY SENSOR signal Indicates that a finished print has been
delivered
PEMP
PAPER SENSOR signal
Indicates no paper in cassette
PEXP PRECONDITIONING EXPOSURE Causes the drum to be uniformly exposed
PFS
DRIVE command
Indicates that pickup sensor PS 1 senses paper
PPRDY
PICKUP SENSOR signal Indicates that power for the print unit is ON
PRNT
PRINTER POWER READY signal
Starts printing
PSIZEl
}
PRINT command
Indicate whether the cassette is installed and
PSIZE2
cassette size
PSIZE3
PAPER SIZE signals
RDY
READY signal
Indicates that printing is possible
RDYINH
READY INHIBIT command
Enables printing though the print unit is
NOT READY
RGSD REGISTRATION SHUTTER
Actuates SLl
SOLENOID DRIVE command
SBSY STATUS BUSY signal Indicates that the status information of
paper out, jam, etc., is being sent from the
DC controller to the video controller
COPYRIGHT
©
BY CANON INC. CANON LBP-CX SERIES REV.2 JULY 1985 PRINTED IN JAPAN (IMPRIME AU JAPONJ
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