CORONA UNIT SECTION
2-F-6
2 UNIT EXPLANATION
b. Output signals
(1) SEP_CLM_M A, B (ADUDB to M10)
M10 (transfer/separation cleaning) drive control
signal
The drive direction of M10 (transfer/separation
cleaning) drive control signal
The drive direction of M10 is controlled by switch-
ing between the drive current directions of two
signals.
(2) IO_DTXD (PRCB to ADUDB)
Serial data used to report the machine operation
state understood by PRCB (printer control
board) to ADUDB (ADU drive board)
(3) IO_DCLK (PRCB to ADUDB)
Clock signal for IO_DTXD signal
(4) ADU_LATCH (PRCB to ADUDB)
Latch signal for IO_DTXD signal
(5) ACK1 (PRCB to ADUDB)
Reception acknowledgment signal. It is sent
each time PRCB (printer control board) receives
one-byte data from ADUDB (ADU drive board).
When PRCB receives REQ1 and can receive
data, this signal stands at the [L] level.
(6) ERR_OUT1 (PRCB to ADUDB)
This signal requires resending of data when
PRCB (printer control board) has failed in data
reception from ADUDB (ADU drive board) due to
an error.
[7] PCL/TSL Control
LEDs are used for PCL (pre-charging exposure
lamp) and TSL (transfer synchronization lamp).
PCL is driven by the PRCB (printer control
board). TSL is driven by ADUDB (ADU drive
board). PCL and TSL are controlled by PRCB .
1. Operation
PCL turns ON when the START button is
pressed. It is turned OFF after a lapse of the
specified time from turning ON of PS37 (paper
exit). TSL turns ON after a lapse of the specified
time from turning ON of PS43 (leading edge) of
the second paper feed section. It turns OFF after
a lapse of the specified time from detection of the
trailing edge of copy paper.
2. Signals
a. Output signals
(1) PCL CONT (PRCB to PCL)
PCL ON/OFF control signal
[L]: PCL ON
[H]: PCL OFF
(2) TSL_DR (ADUDB to TSL)
TSL ON/OFF control signal
[L]: TSL ON
[H]: TSL OFF
Status
SEP_CLM_MA SEP_CLM_MB
Forward stroke of
cleaning
HL
Backward stroke
of cleaning
LH
Stop
LL
ADUDB
MC24V
TSL DR
PRCB
IO DTXD
IO DCLK
ADU LATCH
IO UCLK
REQ1
IO URXD
ACK1
ERR OUT1
MC 24V2
PCL CONT
DCPS
24V1
5V2
S.GND
P.GND
5V2
S.GND
24V1
P.GND
TSL
PCL
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