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62 MFP unit explanation ENWW
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.
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
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