M14 (Blade) Control - Konica Minolta 7085/FORCE 85 Service Manual

CLEANING/TONER RECYCLE UNIT

[3] M14 (Blade) Control

3
M14
For 7085
M14 (blade) is a 24V DC driven motor and drives the
3
cleaning blades. By M14, the cleaning blade contacts
on the drum surface slight pressing or pressing to clean
the drum surface. These two blades are automatically
switched by M14. M14 is controlled by PRCB (printer
control board) via DCDB (DC drive board) (for 7075),
or directly by PRCB (for 7085). Related signals are
PS30 (blade 1) and PS31 (blade 2).
1. Operation
M14 turns ON/OFF in synchronized with ON/OFF
of M2(drum).
The blade is controlled (pressing, slight pressing,
and switching) by PS30 and PS31 detecting the
blade position, and M14 rotaing forward and
backward.
The following table shows the relationship
between PS30/PS31 and blade position.
MODEL
7075/7085
SERVICE HANDBOOK
5VDC
PS30
SGND
PS31
M14 DRIVE 1
M14 PL
M14 DRIVE 2
M14 NL
M14 PR
M14 NR
M14 CEM
M14 24FEM
PRCB
24VDC 24VDC
PGND PGND
DCPS2
MANUAL REVISED EDITION
PS30
PS31
M14 DRIVE 1
M14 DRIVE 2
DCDB
5VDC
SGND
DCPS1
MS2 MS1
Sensor
CW/
Pressing
CCW
PS30 OFF OFF
PS31 ON OFF
*Note: CW/CCW indicate the M14 rotating
direction for pressing, slight pressing, and
switching. The sensor logic for slight
pressing position is different between CW
and CCW rotation.
CCW: ON
CW: OFF
DATE
2 - I - 2
Jan. 2002
3
M14
For 7075
Blade Position
CW/
Slight Switching
CCW
pressing
* ON ON
ON or OFF
OFF OFF ON
PAGE METHOD
2-I-2 REPLACEMENT