CORONA UNIT SECTION
2-F-5
2 UNIT EXPLANATION
[6] M10 (Transfer/Separation Cleaning)
Control
M10 (transfer/separation cleaning) is a DC motor
powered by 24 VDC and is controlled by PRCB
(printer control board) via ADUDB (ADU drive
board). Between PRCB and ADUDB, signals are
exchanged using serial data.
1. Operation
a. Purpose of driving
M10 (transfer/separation cleaning) used to drive
the transfer/separation wire cleaning pads.
b. Operation timing
The transfer/separation wires are cleaned when
SW2 (sub power) is turned ON or when the fixing
temperature is lower than 122
°
F.
It is also carried out after the specified copy count
is reached.
* Changeable with the 25-mode DIP SW
c. Cleaning operation
Normally, the transfer/separation wire cleaning
pads are on the front side of the machine. They
move back and forth to clean the transfer and
separation wires. The movement direction is
changed by changing the rotational direction of
M10 (transfer/separation cleaning).
The rotational direction of M10 and the position
of the cleaner are detected by monitoring the cur-
rent value of M10 with PRCB (printer control
board). (7155/7165)
The rotational direction of M10 and the position
of the cleaner are detected by turning on/off the
PS52 (transfer/separation PS/F) and PS53
(transfer/separation PS/R). (7255/7272)
2. Signals
a. Input signals
(1) IO_URXD (ADUDB to PRCB)
Serial data used to report the ADUDB (ADU
drive board) operation state to PRCB (printer
control board)
(2) REQ1 (ADUDB to PRCB)
This signal indicates that sending data from
ADUDB (ADU drive board) to PRCB (printer con-
trol board) is requested.
When ADUDB receives ACK1 and can send
data, this signal stands at the [L] level.
(3) IO_UCLK (ADUDB to PRCB)
Clock signal for IO_URXD signal
(4) HP_PS_F (PS52 to ADUDB)
Home position detection signal of transfer/sepa-
ration cleaning member
It becomes L when transfer/separation cleaning
member reaches the home position.
(5) HP_PS_R (PS53 to ADUDB)
Reverse position detection signal of transfer/
separation cleaning member
It becomes L when transfer/separation cleaning
member reaches the reverse position.
4
7272ma2003
ADUDB
SEP CLM M A
SEP CLM M B
5V2
HP_PS_F
SGND
5V2
HP_PS_R
SGND
PRCB
IO DTXD
IO DCLK
ADU LATCH
IO UCLK
REQ1
IO URXD
ACK1
ERR OUT1
DCPS
24V1
5V2
S.GND
P.GND
5V2
S.GND
M10
PS52
(7255/7272)
PS53
4
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MODEL MANUAL REVISED EDITION DATE PAGE METHOD
SERVICE MANUAL Dec. 2003
7155/7165/7255/7272
2-F-5 REPLACEMENT
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