Konica 7075 GUIDE MANUAL 7075030e

3

DISASSEMBLY/ASSEMBLY

3 DIS./ASSEMBLY

3 DIS./ASSEMBLY

This section explains how to disassemble and reassemble the machine.
When disassembling and reassembling the machine, follow the
precautions given below.

1. Be sure the power cord has been unplugged from the wall outlet.

2. The disassembled parts must be reassembled following the
disassembly procedure in reverse unless otherwise specified.

3. Care should be taken not to lose small parts. Care should also be
taken not to install small parts in wrong places.

4. Do not operate the machine before installing all the disassembled
parts completely .

5. Removal of some screws is prohibited in this section. Never loosen
them.

EXTERNAL SECTION

EXTERNAL SECTION

[1] Replacing Ozone Filters

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Caution: When replacing ozone filters, insert

them in the openings in the main body
as far as they will go.

a. Procedure

(1) Loosen the two screws to remove the cooling fan

cover.

(2) Replace two ozone filters 1 (upper/2) and one

ozone filter 2 (lower/1).

Ozone filter 1

Screws
(loosen 2)

[2] Removing and Reinstalling the

External Cover

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Remove the two screws to detach the option

cover.

(2) Remove the nine screws to detach the rear cover.

Rear cover 1

Screws (9)

3 DIS./ASSEMBLY

Ozone filter 2

(3) Reinstall the above parts following the removal

steps in reverse.

Cooling cover

Option cover 1

(3) Remove the six screws to detach the left side

cover.

Screws (6)

Left side cover

Screws (2)

3 - A - 1

EXTERNAL SECTION

(4) Remove the four screws to detach the right side

cover (upper).

Right side cover (upper)

Screws (4)

(5) Open the vertical paper transport jam access

door.

(6) Remove the four screws to detach the right side

3 DIS./ASSEMBLY

cover (lower).

[3] Removing and Reinstalling the Front

Right Door

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Open the front right door.
(2) Remove the screw to disconnect the ground

cable.

Ground
cable

Right side cover (lower)

Screws (4)

Vertical paper
transport access
door

(7) Reinstall the above parts following the removal

steps in reverse.
Caution: Covers can be detached separately.

Screw

(3) Loosen the two screws securing the hinge.
(4) While holding the top of the front right door by

hand so that it does not fall down, remove the
door with the hinge pin held up.

Front
right door

Screws
(loosen)

3 - A - 2

(5) Reinstall the above parts following the re-

moval steps in reverse.

EXTERNAL SECTION

[4] Removing and Reinstalling the Front

Left Door

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Open the front left door.
(2) Remove the screw to disconnect the ground

cable.

Ground cable

[5] Removing and Reinstalling the

Operation Panel

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Open the RADF.
(2) Remove the two shoulder screws to remove

the original stopper plate (right).

(3) Remove the three shoulder screws to remove

the original stopper plate (rear).

(4) Remove the two shoulder screws to remove

the original stopper plate (left).

(5) Remove the platen glass.

Shoulder
screws
(2)

Shoulder
screws (3)

Original
stopper
plate (rear)

Shoulder
screws (2)

3 DIS./ASSEMBLY

Screw

(3) Loosen the two screws securing the hinge.

Caution: When loosening the screws, hold the

top of the door by hand so that it does
not fall down.

(4) Remove the door with the hinge pin held up.

Front left door

Screws
(loosen)

Original
stopper
plate (left)

Platen glass

Original
stopper plate
(right)

(5) Reinstall the above parts following the removal

steps in reverse.

3 - A - 3

EXTERNAL SECTION

(6) Remove the six screws to detach the top

cover (middle).

(7) Open the front right door and the front left door.

Screws (6)

Top cover (middle)

(8) Draw out the toner supply unit. (See “TONER

3 DIS./ASSEMBLY

SUPPLY UNIT.”)

(9) Remove the seven screws (three at the top and

four on the bottom).

(10)Draw out the operation panel forward.

Caution: When removing the operation panel,

pay attention to the following points:

• The operation panel and main
body are connected with a wiring
harness. Moving the operation
panel too far away from the main
body could break the wiring
harness.

• Care should be taken not to
damage the display section.

(11) Disconnect the two relay connectors (CN475,

CN157) and remove the operation panel.

Connector (CN475)

Connector (CN157)

Screws (3 at the top)

Screws (4 on the buttom)

(12)Reinstall the above parts following the removal

steps in reverse.

3 - A - 4

DRIVE SECTION

DRIVE SECTION

[1] Removing and Reinstalling the

Drum Motor

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Caution: Be sure to draw the drum unit out of

the main body before removing or
reinstalling the drum drive motor.
If you fail to draw out the drum unit,
the cleaning blade may be damaged
because the drum rotates when
installing or removing the flywheel
or gear.

a. Procedure

(1) Draw the drum unit out of the main body. (See

“DRUM UNIT.”)

(2) Remove the rear cover. (See “EXTERNAL SEC-

TION.”)

(3) Remove the three screws to remove the three

flywheels.

(4) Loose the two setscrews to remove the gear

holder, gear, and pin from the shaft.
Caution 1: Install the gear with the shaft pin fit

into the groove at the back of the
gear. As the pin inserted in the shaft
moves freely, take care not to drop
or lose it.

Caution 2: Secure the gear holder with the

setscrews while pressing the gear
holder against the gear.

Gear

Gear
holder

Pin

Pin

3 DIS./ASSEMBLY

Flywheels (3)

Setscrews (loosen 2)

Groove (at
the back of
gear)

(5) Disconnect the connector (CN58) and remove

the four screws to detach the drum motor unit.

Connector (CN58)

Drum motor unit

Screws (3)

3 - B - 1

Screws (4)

DRIVE SECTION

(6) Disconnect the connector (CN180) and remove

the four screws and two locking supports to
remove the drum motor from the drum motor unit.

Screw (4)

Drum motor
(M2)

Connector (CN180)

Locking supports

(7) Reinstall the above parts following the removal

3 DIS./ASSEMBLY

steps in reverse.
Caution: When installing the gear holder, set it

to fit to the gear, then secure it b y the
set screw .

[2] Removing and Reinstalling the Main

Motor

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

(1) Remove the rear cover. (See “EXTERNAL SEC-

TION.”)
(2) Disconnect the connector (CN181).
(3) Remove the four screws to release the motor

board locking supports.
(4) Remove the main motor from the main body.

Main motor

Locking
supports

Screws

Connector (CN181)

3 - B - 2

READ SECTION

READ SECTION

[1] Screw that Must not be Removed/

Loosened

a. 14 screws securing the CCD unit

Screws that

Screws that
must not be
removed

Screws that must not be removed

Screws that
must not be
removed

b. One screw securing the read position

adjusting plate and two screws securing the
glass stopper plate (right)

must not be
removed

[2] Removing and Reinstalling the CCD

Unit

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Caution: Be sure to perform image adjustment

after installing the CCD unit. (See
“ADJUSTMENT.”)

a. Procedure

(1) Remove the original stopper plates (right, rear,

and left), platen glass, and top cover (middle).
(See “EXTERNAL SECTION.”)

(2) Remove the two screws to detach the white color

reference plate assembly.

Screws (2)

3 DIS./ASSEMBLY

Read position
adjusting plate

Screws that must
not be removed

White color reference
plate assembly

(3) Remove the two screws to detach the lens light

blocking cover 2.

Screws (2)

Glass stopper plate (right)

Lens light blocking cover

3 - C - 1

READ SECTION

(4) Remove the eight screws to detach the lens light

blocking cover 1.

Screws (8)

Lens light blocking cover 1

(5) Remove the left side cover. (See “EXTERNAL

SECTION.”)

(6) Remove the seven screws to detach the fan

3 DIS./ASSEMBLY

mounting plate.

(7) Disconnect the connector (CN110) from the im-

age control board.

Image control board

Connector (CN110)

(8) Disconnect the connector (CN197) from the CCD

unit.

Screws (7)

Connector (CN197)

Fan mounting bracket

3 - C - 2

READ SECTION

(9) Remove the two screws to detach the CCD unit.

Screws (2)

CCD unit

(10)Reinstall the above parts following the removal

steps in reverse.

[3] Replacing the Exposure Lamp

Caution 1. Be sure the power cord has

been unplugged from the wall
outlet.

Caution 2. Do not touch the exposure

lamp with bare hands.

Caution: Be sure to perform image adjustment

after installing the exposure lamp.
(See “ADJUSTMENT.”)

a. Procedure

(1) Remove the original stopper plates (right, rear,

and left), platen glass, and top cover (middle).
(See “EXTERNAL SECTION.”)

(2) Move the exposure unit to the notch in the main

body frame on the paper exit side.

(3) Remove the connector and two screws to detach

the exposure unit.

Screws (2)

Exposure lamp

Connector

3 DIS./ASSEMBLY

3 - C - 3

(4) Reinstall the above parts following the removal

steps in reverse.

READ SECTION

[4] Replacing and Reinstalling the

Exposure Unit

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Caution 1: When installing the exposure unit,

use the optical unit positioning jig.

Caution 2: Be sure to perform image adjust-

ment after installing the exposure
lamp. (See “ADJUSTMENT.”)

a. Removal procedure

(1) Remove the original stopper plates (right, rear,

and left), platen glass, and top cover (middle).
(See “EXTERNAL SECTION.”)

(2) Remove the operation panel. (See “EXTERNAL

SECTION.”)

(3) Move the exposure unit to the notch in the main

body frame on the paper exit side.

(4) Remove the two screws to detach the cord clamp

(B).

(5) Remove the screw to remove the ground termi-

3 DIS./ASSEMBLY

nal.
(6) Disconnect the connector (CN632).
(7) Remove the four screws to detach the exposure

unit.

Exposure unit fixing screw

b. Installation procedure

(1) Insert the optics unit positioning jig in the hole at

the exposure unit mounting position from the
front.

(2) Slide the exposure unit to the paper feed side

until it touches the optical unit positioning jig.

Exposure unit

Optics unit positioning jigs

(3) Secure the four screws to attach the exposure

unit to the optics wire mounting bracket.
(4) Remove the optics unit positioning jig.
(5) After the procedure (4), reinstall the parts re-

moved in "a. Removal procedure" following the

removal steps in reverse.

Screws (2)

Screws (2)

Connector
(CN632)

Screw (ground) Exposure unit fixing screw

Cord clamp/B

Screws

3 - C - 4

READ SECTION

[5] Installing the Optics Wire

Caution: Be sure the power cord has been

unplugged from the wall outlet.

Caution 1: When winding the optics wire

around the pulley, be sure to run
the wire tightly so that it does not
ride on the side of the pulley.

Caution 2: When re-tensioning or replacing

the optics wire, be sure to use the
optics positioning jig.

Caution 3: Be sure to perform image adjus-

tment after replacing or re-insta­lling the wire. (See “ADJUSTM­ENT.”)

a. Procedure

(1) Remove the exposure unit.
(2) Remove the two screws to detach the white color

reference plate.

Screws

(4) Insert the optics positioning jigs in the holes at the

exposure unit mounting position from the front.

Exposure unit

V-mirror unit

Optics positioning jigs

Exposure unit fixing hole

V-mirror fixing hole

3 DIS./ASSEMBLY

White color reference
plate

(3) Move the V-mirror unit toward the paper feed

side, then insert the optics positioning jigs from
the front to secure the V-mirror unit. Ensure that
the optics positioning jigs pass through the V­mirror unit.

Optics positioning jig insertion holes

3 - C - 5

READ SECTION

(5) The exposure unit mounting plate is installed on

each optics wire. The position of mounting plate
differs depending on whether it is installed on the
front or rear wire. Use the wire on which the
mounting plate is installed nearer to the metal
bead at the end, at the rear.

(6) Place the metal bead at the midpoint of each

optics wire in the mounting hole in the drive
pulley. Starting at this point, wind the optics wire
five turns to the outside and four times to the
inside on the drive pulley.

Caution 1: Ensure that there is a metal bead

at the end of the outer wire, and a
wire terminal at the end of the inner
wire.

Caution 2: Pull out the outer wire from above

the drive pulley in the paper exit
direction, and the inner wire from
under the drive pulley in the paper
feed direction.

(7) After winding the outer wire, secure it to the wire

3 DIS./ASSEMBLY

stopper via the outside of pulley 1 and V-mirror
pulley.

3 - C - 6

READ SECTION

Five turns

Front

Metal bead

Optics wire
(front)

11

Four

Drive
pulley

Wire stopper

Metal bead

Wire
stopper

10

Pulley 1

Four

10

Wire stopper

Metal bead

Metal bead

Five turns

Rear

Metal bead

Exposure unit
mounting piece

Optics wire
(rear)

V-mirror
unit

Wire stopper

V-mirror unit

Metal
bead

Spring

Screws

Spring fixing plate

Exposure unit
mounting piece

Metal bead

Rear

Pulley 3

Spring fixing plate

13

12

Lug terminal

11

Pulley 1

Pulley 2

3 DIS./ASSEMBLY

9

Pulley 1

V-mirror
unit

Caution: There are two grooves in the wire

stopper. Ensure that the outer groo ve
is at the rear and the inner groove is
at the front.

(8) Pass the inner wire through the notch in the wire

stopper, reverse it at pulley 2, pass it along the
inside of the V-mirror pulley and pulley 3, then
attach the wire terminal to the spring fixing plate.
At this time, secure the spring fixing plate tempo­rarily with one screw.

Metal bead

Optics wire (rear)

Optics wire (front)

(9) Install the other wire following the same proce-

dure.

(10)Loosen each screw that was tightened tempo-

rarily, install the spring on the spring fixing plate,
and tighten each screw.

3 - C - 7

READ SECTION

[6] Cleaning the Slit Glass and White

Color Reference Plate Glass

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

(1) Open the RADF.
(2) Remove the original stopper plates (right, rear,

and left) and platen glass. (See “EXTERNAL
SECTION.”)

(3) Remove the two screws to detach the white color

reference plate subassembly.

(4) Clean the slit glass portions of the removed white

color reference plate subassembly and the glass
surface of the white color reference plate, using
drum cleaner and cleaning pad.

White color reference
plate subassembly

3 DIS./ASSEMBLY

Slit glass

[7] Cleaning the Platen Glass

Caution: Be sure the power cord has been

unplugged from the wall outlet.

(1) Open the RADF.
(2) Remove the original stopper plates (right, rear,

and left) and platen glass. (See “EXTERNAL

SECTION.”)
(3) Place the removed platen glass on the towel or

rags and clean it using drum cleaner and cleaning

pad.

Shoulder
screws (2)

Original stopper plate (rear)

Shoulder
screws (3)

Shoulder
screws (2)

White color reference
plate glass

(5) Reinstall the above parts following the removal

steps in reverse.

Platen glass

Original stopper plate (left)

Original
stopper plate
(right)

(4) Reinstall the above parts following the removal

steps in reverse.

3 - C - 8

WRITE SECTION

WRITE UNIT

[1] Removing and Reinstalling the Write

Unit

Warning:

(1) Do not energize the write unit when it is

not in the correct position.

(2) Never remove the write unit cover and the

polygon unit cover.
If the laser beam gets into your eyes, y ou
may lose your sight.

(3) Never remove the write unit for at least

two minutes after turning OFF the main
switch.

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Remove the original stopper plates (right/rear/

left) and platen glass. (See “EXTERNAL SEC­TION.”)

(2) Remove the six screws to detach the board

protection cover.

Screws (6)

(3) Disconnect the four connectors (CN190, 191,

192, and 193) from the write unit.

CN190

CN191

Write unit

(4) Remove the right side cover (upper) (by remov-

ing the four screws).

(5) Disconnect the three connectors (CN76, 474 and

583).

(6) Remove the four screws to detach the write unit

cover.

CN193

CN192

3 DIS./ASSEMBLY

Board protection cover

Screws (4)

Connector (CN76,
CN583)

Write unit cover

Connector (CN474)

3 - D - 1

WRITE UNIT

(7) Loosen the two screws to draw out and remove

the write unit.

Screw (loosen)

Screw (loosen)

Write unit

(8) Reinstall the above parts following the removal

steps in reverse.

3 DIS./ASSEMBLY

[2] Cleaning the Dust-proof Glass

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Draw out the drm unit. (See “Drum Unit.”)
(2) Remove the dust-proof glass assembly by draw-

ing it out forward.
(3) Using a cleaning pad and blower brush, clean the

dust-proof glass portions.

Dust-proof glass

Drum unit

(4) Reinstall the above parts following the removal

steps in reverse.

3 - D - 2

[3] Removing and Reinstalling the

Image Control Board

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Remove the left side cover. (See “EXTERNAL

SECTION.”)

(2) Remove the seven screws to detach the fan

mounting plate.

Fan mounting plate

WRITE UNIT

(5) Reinstall the above parts following the removal

steps in reverse.

Caution 1: Insert the board along the guides

in the main body.

Caution 2: Be sure the connector of the board

is inserted securely.

Image control board

Screw (7)

(3) Remove the CCD flat cable connector (CN110)

and ethernet cable connector (CN111).

(4) Remove the two screws and the image control

board.

Connector (CN 110)

Connector
(CN111)

Guide

3 DIS./ASSEMBLY

Screws (2)

Image control board

3 - D - 3

DRUM UNIT

DRUM UNIT

[1] Removing and Reinstalling the

Drum Unit

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Caution 1: Be sure to put a drum cover over

the removed drum unit and store
the drum unit in a dark place.

Caution 2: When installing or removing the

drum unit, do not rotate it in the
direction opposite to the specified
one. Rotating the drum unit in the
opposite direction during copy
operation could damage the
cleaning blade.

Caution 3: When installing or removing the

drum unit, take care not to touch
the separation claw.

a. Procedure

(1) Open the front right door to draw out the toner

supply unit completely. (See “TONER SUPPLY
UNIT”)

(2) Remove the three screws to detach the drum

cover.

(3) With the solenoid release lever under the ADU

frame held down to the left, turn down the ADU

frame drawing lever.
(4) Remove the two screws securing the drum unit.
(5) Remove the screw securing the coupling to de-

tach the coupling.
(6) Supporting the drum unit by hand at the two

positions shown below, draw out the drum unit.

Caution: When drawing out the drum unit, do

not grip the pipe in the toner recycle
section.

Hold here.

3 DIS./ASSEMBLY

Handle

Coupling

Screw

Drum cover

Screws (2)

Handle release lever

(7) Reinstall the above parts following the removal

steps in reverse.

Caution: For how to install the coupling, see “[2]

Installing the Coupling.”

Screw (3)

3 - E - 1

DRUM UNIT

[2] Cleaning and Installing the Coupling

Caution: Be sure the power cor d has been

unplugged from the wall outlet.

a. Procedure

(1) Clean the outer surface of the coupling with drum

cleaner.

(2) Aligning the line marked on the coupling with the

key way in the drum shaft, push in the coupling by
hand.

Marked­off line

Key way

3 DIS./ASSEMBLY

[3] Removing and Reinstalling the

Drum Temperature Sensor Board

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Draw the drum unit out of the main body.
(2) Disconnect the three connectors (350, 351, and

353) and remove two screws to detach the sen­sor support stay assembly.

Connector (CN350)

Connector (CN353)
Connector (CN353)

Sensor support stay
assembly

Screws (2)

Cord tie

(3) While pressing the standard screwdriver tip

against the coupling, turn the coupling clockwise
until the cut face of the coupling is flush with the
bearing face.

Cut face

Bearing face

Driver

(4) Tighten the screws.

Connector (CN351)

3 - E - 2

DRUM UNIT

(3) Disconnect the connector (CN455) and remove

three screws to detach the drum temperature
sensor.

Connector (CN455)

Drum temperature sensor

Screws (three)

(4) Reinstall the above parts following the removal

steps in reverse.
Caution: After reinstalling the drum temperature

sensor board, visually check that the
drum temperature sensor is in good
contact with the drum.

[4] Cleaning the Toner Control Sensor

Board

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Draw the drum unit out of the main body.
(2) Remove the drum cleaning unit. (See “CLEAN-

ING/TONER RECYCLE UNIT.”)
(3) Remove the screw at the back of the sensor

guide and loosen the screw at the front to move

the sensor guide.

Screw

3 DIS./ASSEMBLY

Sensor guide

Screw (loosen)

(4) Clean the sensors on the toner control sensor

board (the Dmax/jam detection sensor at the

front and the γ sensor at the back) using a blower

brush.

γ sensor

Dmax/jam detection sensor

3 - E - 3

DRUM UNIT

[5] Removing, Cleaning and

Reinstalling the Drum

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Caution1: Be careful not to touch the drum

or the cleaning blade with bare
hands, or damage these parts.

Caution2: When leaving the drum to stand,

be sure to put a drum cover over
the drum and store it in a dark
place.

Caution3: When reinstalling the drum,

cleaning blade and toner guide
brush, apply setting powder to the
entire surface of the drum and also
to the cleaning blade regardless of
whether the parts are new or old.

Caution4: After applying setting powder to the

drum, carry out the following work
before installing the drum unit in

3 DIS./ASSEMBLY

a. Procedure

(1) Draw the drum unit out of the main body.
(2) Remove the charging corona unit, developing

unit, developing suction assembly drum tem­perature sensor board, and cleaning unit. (See
“CORONA UNIT SECTION,” “DEVELOPING
UNIT,” and “CLEANING/TONER RECYCLE
UNIT.”)

the main body.

1) With the charging corona unit
and developing unit removed,
turn the drum once (to prevent
setting powder from scattering
onto the charging corona unit,
and to prevent image defects).

2) When installing a new drum, be
sure to enter the 25 mode and
select “Copy Count by Parts to
be Replaced” to reset drum
counter. (See “ADJUSTMENT. ”)

(3) Remove the screw at the back of the sensor

guide and loosen the screw at the front to move
the sensor guide (to prevent the drum from being
damaged during reinstallation).

Screw

Sensor guide

Screw (loosen)

(4) Supporting the drum at both ends with your

fingers so that the drum surface is not damaged,
slowly remove it upward (front side first).

(5) Clean the hole (that engages with the bearing on

the rear end of the drum shaft) on the rear side of
the drum cartridge with drum cleaner.

(6) Clean toner scattered around the drum installation

area using a blower brush.

Engaging hole

Drum

3 - E - 4

Need to clean
toner

(7) Reinstall the above parts following the removal

steps in reverse.

DRUM UNIT

[6] Removing and Reinstalling the

Separation Claws

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Caution 1: T ake care not to damage the drum

when removing the separation
claws.

Caution 2: Pa y attention to the orientation and

position of the separation claws
when reinstalling them.

Caution 3: Do not touch the cleaning blade

and drum with bare hands.

a. Procedure

(1) Draw the drum unit out of the main body.
(2) Remove the cleaning/toner recycle unit. (See

“CLEANING/TONER RECYCLE UNIT.”)

(3) To protect the drum surface, set A3 paper as

shown below.
Caution: After installing the separation claw,

remove the A3 paper by pulling it do wn
as shown below.

(4) Disconnect the connector (CN354), and remove

the spring and two screws to detach the separa­tion claw unit.

(5) Remove the retaining ring and slide the shaft to

remove the three separation claws.
Caution 1: Clean the separation claw drive

shaft with alcohol when installing
it.

Caution 2: Must insert the retaining ring

between the ribs.

Caution 3: After reinstalling the separation

claws, make sure they move
smoothly.

Separation
claws

Retaining
ring

3 DIS./ASSEMBLY

Screws

Spring

Connector (CN354)

A3 paper

Ribs

3 - E - 5

DRUM UNIT

(6) Reinstall the above parts following the removal

steps in reverse.
Caution: When installing the separation claw

unit, be sure to fit the pin in the guide
hole as shown below.

Pin

Guide hole

Drum unit

3 DIS./ASSEMBLY

Separation
claw unit

[Reference]
When you removed the separation claw unit (you
need not remove it usually but you need to remove
it only when replacing the solenoid), install it in
the following manner:

(1) Install the separation claw unit in the drum car-

tridge.

(2) Tighten the solenoid screw when one of the

separation claws, which is closest to the drum,
contacts the drum. (Hex. nut, M3)

Separation
claw
solenoid
(SD4)

Screws (2)

(Hex. nut)

Drum

Separation
claw unit

(3) Set the drum cartridge in the main body and

check the tips of the separation claws are off the
drum surface.

Standard value of clearance: More than 0 mm up
to 1 mm inclusive

3 - E - 6

CORONA UNIT SECTION

CORONA UNIT SECTION

[1] Screws that Must not be Removed/

Loosened

a. Five screws securing the transfer entrance

guide plate

Screws that must not be removed

Transfer entrance guide
plate

Caution 1: Do not strain the transf er entrance

guide plate and guide rollers, for
example, pressing down on them
strongly, when removing the
charging corona unit.

Caution 2: T ak e care not to damage the edge

of the transfer entrance guide plate
since it is deformed easily.

[2] Removing and Reinstalling the

Charging Corona Unit

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Caution: When removing the charging

corona unit, do not touch the mesh
of the charge control plate.

a. Procedure

(1) Remove the drum unit from the main unit. (See

“DRUM UNIT.”)

(2) Disconnect the connector (CN353). Holding the

charging corona unit at the positions shown be­low with both hands, remove it.

Connector (CN353)

Charging corona
unit

3 DIS./ASSEMBLY

3 - F - 1

(3) Reinstall the above parts following the removal

steps in reverse.

CORONA UNIT SECTION

[3] Removing and Reinstalling the

Charge Control Plate

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Remove the charging corona unit.
(2) Press the lever in the direction of the arrow to

release the lock, then remove the charge control
plate.
Caution: Do not loosen or tighten the screws

securing the lever.

Charge control plate

3 DIS./ASSEMBLY

(4) Remove the springs of wires (one each) to re-

move the wires.
Caution 1: Do not drop or lose the support

rubbers when removing wires.

Caution 2: Reinstall wires so that their hooks

are inside.

Spark arrester plate

Lever

(3) Reinstall the above parts following the removal

steps in reverse.

[4] Replacing the Charging Wires

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Remove the charging corona unit.
(2) Remove the charge control plate.
(3) Remove the spark arrester plates (front and

rear).

Support rubber

Wire

Spring

Hook (inward)

3 - F - 2

(5) Reinstall the above parts following the removal

steps in reverse.

CORONA UNIT SECTION

1

2

3

[5] Removing and Reinstalling the

Charging Wire Cleaning Pad

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Remove the two charging wires.
(2) Remove the two retaining rings to remove the

charging wire cleaning pads.
Caution 1: Take care not to drop or lose the

lower collars when removing the
charging wire cleaning pads.

Caution 2: When reinstalling the charging wire

cleaning pads, pay attention to the
orientation shown below. Do not
forget to attach the collars.

Charging wire cleaning pad

[6] Removing and Reinstalling the PCL

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Remove the charging corona unit.
(2) Disconnect the connector (CN356) of the PCL

and release the lock to remove the PCL.

Connector
(CN356)

3 DIS./ASSEMBLY

Collar

Retaining ring

Charging wire
cleaning pad

(3) Reinstall the above parts following the removal

steps in reverse.

(3) Reinstall the above parts following the removal

steps in reverse.

3 - F - 3

CORONA UNIT SECTION

[7] Cleaning the Charging Corona Unit/

PCL

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Remove the charging corona unit.
(2) Remove the charge control plate and PCL.
(3) Place the charge control plate on a flat place and

clean its surface with light taps of the cleaning
pad moistened with drum cleaner. Next, remove
any remaining dirt with a blower brush.
Caution: Take care not to damage the mesh of

the charge control plate during
cleaning.

(4) Clean the PCL with a cleaning pad moistened

with drum cleaner.

3 DIS./ASSEMBLY

Charge control plate

[8] Removing and Reinstalling the

Transfer/Separation Corona Unit

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Open the toner supply unit. (See “TONER SUP-

PLY UNIT.”)
(2) Detach the ADU cover. (See “ADU UNIT.”)
(3) Loosen the two screws to remove the transfer/

separation corona unit.

Transfer/separation corona unit

Screw

PCL

Screw

Lever

(4) Reinstall the above parts following the removal

steps in reverse.

Caution: When installing the transfer/

separation corona unit, make sure the
cleaning gear coupling is engaged
properly.

3 - F - 4

CORONA UNIT SECTION

[9] Removing and Reinstalling the

Plunger Prevention Plate

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Open the toner supply unit. (See “TONER SUP-

PLY UNIT.”)

(2) Draw the ADU frame out of the main body. (See

“ADU UNIT.”)
(3) Remove the transfer/separation corona unit.
(4) Release the twelve locks to remove the plunger

prevention plate.

Plunging prevention plate

[10] Replacing the Transfer/Separation

Wires, Transfer/Separation Wire
Cleaning Block and Support
Rubbers

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Open the toner supply unit. (See “TONER SUP-

PLY UNIT.”)

(2) Draw the ADU frame out of the main body. (See

“ADU UNIT.”)
(3) Remove the transfer/separation corona unit.
(4) Remove the plunger prevention plate.
(5) Remove the spark arrester plates (front and

rear).

Spark arrester plate (rear)

Spark arrester plate (front)

3 DIS./ASSEMBLY

Locks
(the same number of locks
on the opposite side)

(5) Reinstall the above parts following the removal

steps in reverse.

(6) Remove the springs of wires (one each) to re-

move the wires.

Caution: When installing the springs, bend the

edge of each spring in side.

3 - F - 5

CORONA UNIT SECTION

(7) Remove the three wires from cleaning blocks

along with support rubbers.

Transfer/cleaning
block

Separation wire cleaning block

Transfer wire

Separation wire

Support rubber

3 DIS./ASSEMBLY

(8) Turn the transfer/separation corona unit upside

down, remove the retaining rings, and remove
the transfer wire cleaning block and separation
wire cleaning block from the front side.

Spring

Coupling

Retaining rings

(9) Reinstall the above parts following the removal

steps in reverse.
Caution: When installing the transfer/

separation wires, check the coupling
of the cleaning pad drive gear is
engaged correctly.

3 - F - 6

CORONA UNIT SECTION

[11] Removing and Reinstalling the TSL

Unit

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Open the toner supply unit. (See “TONER SUP-

PLY UNIT.”)

(2) Draw the ADU frame out of the main body. (See

“ADU UNIT.”)
(3) Remove the transfer/separation corona unit.
(4) Remove the four screws to remove the transfer

exposure cover.

Transfer and exposure cover

Screws

Screw

(5) Disconnect the relay connector (CN567) to re-

move the TSL unit.
Caution: Each relay connector consists of a

male side and a female side. Be sure
to remove only the male side (shown
below) of the CN567 connector.

Relay connector (CN567)

TSL unit

3 DIS./ASSEMBLY

(6) Reinstall the above parts following the removal

steps in reverse.

3 - F - 7

DEVELOPING UNIT

DEVELOPING UNIT

[1] Screws that must not be Removed/

Loosened

a. Procedure

(1) Two screws securing the toner transfer regulation

plate.
(2) One screw securing the magnet angle adjusting

knob.

Screws that must not be removed

Screws that must not be removed

[2] Removing and Reinstalling the

Developing Unit

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Draw out the drum unit from the main body. (See

“DRUM UNIT.”)

(2) Remove the screw to remove the toner suction

filter case.

Toner suction filter case

Screw

3 DIS./ASSEMBLY

(3) Release the developing unit push pressure lever.

Caution: When releasing the push pressure

lever, do not touch the front and rear
panels of the drum unit.

Developing unit push

Rear panel

pressure lever

Front panel

3 - G - 1

DEVELOPING UNIT

(4) Supporting the developing unit at the positions

shown below with both hands, remove it from the
drum unit.

Developing unit

(5) Reinstall the above parts following the removal

steps in reverse.

3 DIS./ASSEMBLY

Caution 1: When installing the developing unit,

assure that the toner transfer sleeve
does not contact with the front panel
of the drum unit.

Caution 2: Never rotate the developing gear

clockwise.

[3] Replacing the Developer

Caution 1: When replacing the developer in

the developing unit, take care not
to allow dirt to get into it.

Caution 2: To rotate the developing sleeve,

rotate the developing gear counte­rclockwise using a standard scre­wdriver.

Caution 3: Never rotate the developing gear

clockwise.

Developing gear

a. Procedure

(1) Draw out the drum unit from the main body. (See

“DRUM UNIT.”)
(2) Remove the developing unit from the drum unit.
(3) Release the hooks of the developing unit cover

and remove it upward.

3 - G - 2

Developing unit cover

DEVELOPING UNIT

(4) Tilt the developing unit about 45° and rotate the

developing gear counterclockwise using a
standard screwdriver to discharge all of the
developing adhering to the inside of the developing
unit and magnet roller.

Developing gear

45°

(5) Supply fresh developer evenly from the top of the

agitator screws.

(6) Rotate the developing gear until the developer

enters the developing unit.

(7) Perform steps (5) and (6) repeatedly to supply all

of the developer.

(8) Rotate the developing gear counterclockwise to

check that the developer bristles along the entire
length of the toner transfer sleeve.

Developing sleeve

Developing gear

Developing unit
stopper roller

(9) Install the developing unit cover, then install the

developing unit in the drum unit.
Caution: After installing the developing unit in

the drum unit, make sure the
developing unit stopper roller is in
contact with the developing unit
stopper plate (allocation of DSD).

3 DIS./ASSEMBLY

Developer

Developing unit
stopper roller

3 - G - 3

DEVELOPING UNIT

[4] Removing and Reinstalling the

Developing Suction Filter

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Draw out the drum unit from the main body. (See

“DRUM UNIT.”)

(2) Open the lid of the developing suction filter case

and remove the suction filter.

Suction filter case

Suction filter

Lid

3 DIS./ASSEMBLY

(3) Reinstall the above parts following the removal

steps in reverse.
Caution: When installing the developing suction

filter, assure that the lid of de v eloping
suction filter is closed completely.

3 - G - 4

TONER SUPPLY UNIT

TONER SUPPLY UNIT

[1] Replacing and Cleaning the Toner

Cartridge

a. Procedure

(1) Open the front left and right doors to pull forward

the toner supply unit.

(2) Pull out the toner cartridge locking lever to re-

move the toner cartridge.

Toner cartridge

Push pressure lever

[2] Drawing out the Toner Supply Unit

Warning: The hinge used in the toner

supply unit mounting section
moves in two steps. Take care
not to get your finger caught in
the hinge when drawing out the
toner supply unit.

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Open the front left and right doors.
(2) Remove the three screws.

Caution: The upper left (rear) screw is not

removed because it is f astened with a
clip. Loosen it completely.

Screw fastened with clip

3 DIS./ASSEMBLY

(3) After removing the toner cartridge, clean the area

around the toner cartridge insertion hole with a
cleaning pad.

(4) Reinstall the above parts following the removal

steps in reverse.

Screws (3)

3 - H - 1

TONER SUPPLY UNIT

(3) Pull forward the toner supply unit. Gripping the

portion shown below, pull out the unit completely.

Toner supply unit

3 DIS./ASSEMBLY

[3] Removing and Reinstalling the

Toner Supply Sleeves 1 and 2

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Pull out the toner supply unit completely.
(2) Remove the toner cartridge.
(3) Remove the four screws to detach the top cover.

Screws (4)

Top cover

(4) Reinstall the above parts following the removal

steps in reverse.

3 - H - 2

TONER SUPPLY UNIT

(4) Remove toner supply sleeves 1 and 2.

Caution: T oner supply slee ves 1 and 2 must be

installed observing the correct
orientation shown below.

Toner supply sleeve 2

Correct orientation

Toner supply sleeve 1

[4] Removing and Reinstalling the

Toner Supply Unit

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Pull out the toner supply unit completely.
(2) Remove the toner cartridge.
(3) Disconnect the connector (CN473) and remove

the wiring harness from the four wiring harness
clamps.
Caution: Route the wiring harness carefully

when reinstalling the toner supply unit,
because it is a movable component.

Connector (CN473)

3 DIS./ASSEMBLY

Toner supply sleeve 2

Toner supply sleeve 1

(5) Reinstall the above parts following the removal

steps in reverse.

Wiring harness

clamps (2)

(4) Loosen the two screws to remove the toner

supply unit.

Screws
(2)

(5) Reinstall the above parts following the removal

steps in reverse.

3 - H - 3

CLEANING/TONER RECYCLE UNIT

CLEANING/TONER RECYCLE UNIT

[1] Removing and Reinstalling the

Cleaning/Toner Recycle Unit

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Caution 1: Do not touch the edges of the

cleaning blade with bare hands.

Caution 2: Before reinstalling the cleaning

unit, clean the cleaning/toner
recycle unit with a blower brush
and cleaning pad.

Caution 3: When reinstalling the cleaning unit,

apply setting powder to the entire
surface of the drum and cleaning
blade regardless of whether the
drum and cleaning blade are new
or old.

Caution 4: When you have applied setting

powder to the drum, carry out the
following work bef ore installing the
drum unit on the main body:

1) To ensure accurate toner
concentration, wipe scattered
setting powder off the γ and
Dmax sensors on the toner
control sensor board with a rag
moistened with alcohol.

2) With the charging corona unit
and developing unit removed,
turn the drum once (to prevent
setting powder from scattering
onto the charging corona unit,
and to prevent image defects).

a. Procedure

(1) Manually turn the drum once.

Caution: Must turn the drum once to prevent

toner on the brush falling.

(2) Draw out the drum unit from the main body. (See

"DRUM UNIT.")

(3) Release cleaning unit release levers (on both

sides).

(4) Disconnect one connector (CN355) and remove

the cleaning unit.
Caution 1: Remove the cleaning unit with its

rear surface alingned with the ribs
of the drum cartridge. (Tilt the
cleaning unit approximately 15
degree.)

Caution 2: Remove the cleaning unit with

drum cartridge reference pin in line
with the notch of the cleaning unit.

Notch

3 DIS./ASSEMBLY

Reference pin

Connector (CN355)

3 - I - 1

Cleaning unit

Cleaning unit mounting levers

(5) Reinstall the above parts following the removal

steps in reverse.

CLEANING/TONER RECYCLE UNIT

[2] Cleaning the Cleaning/Toner

Recycle Unit

a. Procedure

(1) Remove the cleaning unit.
(2) Clean the areas shown below with a blower brush

and cleaning pad.

3 DIS./ASSEMBLY

[3] Removing and Reinstalling the

Cleaning Blade

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Caution 1: Be sure to replace the following

parts at the same time:

• Toner cleaning blades 1 and 2

• Toner guide brush/plunging
prevention felt

Caution 2: Do not touch the edges of the

cleaning blade with bare hands.

Caution 3: When reinstalling the cleaning

bade, apply setting powder to the
entire surface of the drum and
cleaning blade regardless of
whether the drum and cleaning
blade are new or old.

Caution 4: When you have applied setting

powder to the drum, carry out the
following work bef ore installing the
drum unit on the main body:

1) To ensure accurate toner

concentration, wipe scattered
setting powder off the γ and
Dmax sensors on the toner
control board with a rag
moistened with alcohol.

2) With the charging corona unit

and developing unit removed,
turn the drum once (to prevent
setting powder from scattering
onto the charging corona unit,
and to prevent image defects).

3 - I - 2

CLEANING/TONER RECYCLE UNIT

a. Procedure

(1) Remove the cleaning unit.
(2) Remove one screw to detach cleaning blade 2.

Screw (1)

Cleaning blade 2

(3) Clean the inside of the cleaning unit with a clean-

ing pad and blower brush.
(4) Install two new cleaning blades.
(5) Pull the blade release arm in the direction as

indicated by arrow in the following figure.
(6) Rotate the blade replacement lever all the way in

the direction as indicated by arrow in the following

figure, and then rotate the blade twice.

Caution: Do not release the blade release arm.

Must keep pulling it.

Blade replacement lever

(7) Pull down the blade release arm.

Caution: Must keep the blade replacement

lever being rotated in the arrow

direction by hand.
(8) Release the blade replacement lever.
(9) Remove one screw to detach cleaning blade 1.

Blade replacement lever

Screw (1)

Cleaning blade 1

(10)Clean the inside of the cleaning unit with a clean-

ing pad and blower brush.
(11)Install new cleaning blade 1.
(12)Reinstall other parts following the removal steps

in reverse.

Caution 1: After replacing cleaning blades 1

and 2, make sure that the blade
replacement lever has been pulled
to stretch the wire.

Caution 2: After replacing cleaning blades,

make sure to perform Blade Setting
Mode Adjustment in the 36 mode to
prevent the blades from peeling.

3 DIS./ASSEMBLY

Blade release
arm

3 - I - 3

CLEANING/TONER RECYCLE UNIT

[4] Removing and Reinstalling the Toner

Guide Brush and Plunger
Prevention Felt

Caution 1: Be sure to replace the following

parts at the same time:

• Toner cleaning blades 1 and 2

• Toner guide brush/plunging
prevention felt

Caution 2: Do not touch the edges of the

cleaning blade with bare hands.

Caution 3: When reinstalling the cleaning

blade, apply setting powder to the
cleaning blade regardless of
whether the parts are new or old.

Caution 4: When you have applied setting

powder to the drum, carry out the
following work before installing the
drum unit on the main body:

1)To ensure accurate toner

concentration, wipe scattered
setting powder off the γ and

3 DIS./ASSEMBLY

Caution 5: When installing the toner guide

Caution 6: Do not touch the toner guide brush

Dmax sensors on the toner
control sensor board with a rag
moistened with alcohol.

2) With the charging corona unit

and developing unit removed,
turn the drum once (to prevent
setting powder from scattering
onto the charging corona unit,
and to prevent image defects).

brush, apply an even coat of setting
powder to the toner guide brush with
it removed from the cleaner unit.

with bare hands. Do not allow the
brush to come into direct contact
with other objects.

a. Procedure

(1) Remove the cleaning unit.
(2) Remove the two screws to detach the toner seal

plate.
Caution: When installing the toner seal plate,

must start securing the front screw
first.

Toner seal board

Caution: If the toner collection sheet on both

ends of cleaner unit are bent over to
the toner guide brush side, toner may
be spilled from the toner collection
unit.
If this happens, correct bent sheet as
follows.
Correct bent toner collection sheet as
it is in parallel with the toner guide
brush or is slightly bent toward the
front (less than 1 mm).

Toner guide br ush

Screws (2)

3 - I - 4

Toner collection
sheet

CLEANING/TONER RECYCLE UNIT

(3) Remove the two screws to detach the two side

seals (front/rear).

Screw

Side seal (front)

(5) Remove one retaining ring and one bearing, then

the plunging prevention felt from the toner guide
brush shaft.

Toner guide brush

Toner prevention collar
(Do not lose.)

Splash
prevention felt
(replace)

Retaining ring

Bearing

(6) Reinstall the above parts following the removal

steps in reverse.

3 DIS./ASSEMBLY

Side seal (rear)

Screw

(4) Remove one retaining ring to detach the toner

guide brush.
Caution: Pull the toner guide brush leftward,

then remove it forward with the gap
between the brush and the bearing
aligned with the side plate.

Tone guide brush

3 - I - 5

CLEANING/TONER RECYCLE UNIT

[5] Replacing Guide Plate Assembly

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Remove the toner guide brush.
(2) Remove one E-ring, and one cleaning unit

mounting lever collar.

(3) Remove two screws to detach the drive shafts

support palte.
(4) Remove the cleaner drive gear A assembly.
(5) Remove the cleaner drive bearing and the

plunging prevention felt.

Caution: Once the plunging prevention felt is

removed, replace it.

(6) Remove one E-ring from the toner guide shaft,

then the cleaner drive gear B.
(7) Remove one E-ring from the toner guide shaft,

then the paper feed bearing.

3 DIS./ASSEMBLY

Paper feed
bearing

Toner guide
shaft

Cleaner
bearing

E-ring
Cleaner drive

gear B

E-ring

Cleaning unit
mounting lever
collar

E-ring

Plunging
prevention
felt

Cleaner drive
gear A
assembly

Drive shaft
support plate

Screw
(TP M3x6)

Screw
(B tight M3x8)

3 - I - 6

(8) Remove one retaining ring from the toner guide

shaft, then the cleaner bearing.

(9) Remove the toner guide shaft.

Caution: When removing the toner guide shaft,

remove it from the side plate R first,
then from the side plate F.

(10)Remove two screws to detach the guide plate

assembly.
Caution: When installing the guide plate

assembly, secure it as it touches the
bottom.

Side plate F

Retaining
ring

Cleaner
bearing

CLEANING/TONER RECYCLE UNIT

Guide plate
assembly

Screws
(TP M4 x 4)

Toner guide
shaft

(11)Reinstall the above parts following the removal

steps in reverse.
Caution: When installing the drive reinforcing

plate, do not confuse the B tight screw
with the TP screw. After securing the
cleaning lever collar with the E-ring,
secure the drive reinforcing plate by
tightening the B tight screw first and
the TP screw next.

3 DIS./ASSEMBLY

Side plate R

3 - I - 7

PAPER FEED UNITS OF TRAYS1 AND 2

PAPER FEED UNITS OF TRAYS 1 AND 2

Caution: The shape and mechanism of tray 1

is the same as those of tray2. The
procedure for removing and reinst­alling tray 1 is explained below.

[1] Removing and Reinstalling Paper

Feed Trays 1 and 2

Warning: When removing the tray, stand

in a proper position so that you
do not hurt your back and waist.
If the tray contains paper,
remove all paper before
removing the tray.

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Open the front left and right doors.
(2) While pressing the tray release lever (at the left)

inward, draw out the tray.

(3) Remove the four screws and remove tray 1 with

it lifted.

[2] Removing and Reinstalling the Front

Covers of Trays 1 and 2

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Draw out paper feed tray 1.
(2) Remove the five screws to remove the front cover

of tray.
Caution: The front cover and main body of the

tray are connected with a wiring
harness of the handle release PS1
(PS14), handle release PS2 (PS15).
Remove the front cov er from the main
body carefully so as not to break the
wiring harness.

(3) Disconnect the handle detection PS connector

(CN265).
Caution: When reinstall the front cover, connect

the handle detection PS connector
without fail. If you f orget to connect it,
you cannot draw out any tray.

3 DIS./ASSEMBLY

Release lever

Screws (4)

Tray 1

Connector
(CN265)

Screws (2)

(4) Reinstall the above parts following the removal

steps in reverse.

Screws (2)

Tray 1 front cover

Screw (1)

Handle releae
PS1 (PS14)
Handle release
PS2 (PS15)

(4) Reinstall the above parts following the removal

steps in reverse.

3 - J - 1

PAPER FEED UNITS OF TRAYS 1 AND 2

[3] Cleaning the Paper Dust Removing

Brush

a. Procedure

(1) Draw out paper feed tray 1.
(2) Release the two latches to detach the paper dust

removing brush.
(3) Clean the paper dust removing brush with a

cleaning pad and blower brush.

Paper dust removing brush

3 DIS./ASSEMBLY

Latches

[4] Cleaning the Paper Pre-registration

PS/Paper Feed PS

a. Procedure

(1) Draw out paper feed tray 1.
(2) Clean the paper pre-registration PS1 (PS48) / the

paper pre-registration PS2 (PS50) and the paper
feed PS1 (PS47) / the paper feed PS2 (PS49)
with a blower brush.

Paper pre-registration PS1
(PS48)
Paper pre-registration PS2
(PS50)

Paper feed PS1
(PS47)
Paper feed PS2
(PS49)

Clean these sensors.

(View from below)

3 - J - 2

PAPER FEED UNITS OF TRAYS1 AND 2

[5] Removing and Reinstalling the

Paper Feed Roller and the Feed
Roller

a. Procedure

(1) Draw out paper feed tray 1.
(2) Remove the two retaining rings and slide the two

bearings outward to detach the paper feed roller
unit.

Retaining
ring

Bearing

Paper feed roller
unit

Bearing

Retaining
ring

(3) Remove the following parts from the paper pick-

up roller unit to remove individual rollers:

• Retaining rings (three)

• Bearing (one)

• Paper feed reference actuator

• Shafts (two)

• Fixing plate

Painting mark

Feed roller

Fixing
plate

Retain­ing ring

Paper pick­up
reference
actuator

Paper feed
roller

Retaining

Bearing

ring

3 DIS./ASSEMBLY

(4) Reinstall the above parts following the removal

steps in reverse.
Caution 1: When reinstalling rollers, pay

attention to their orientation.

Caution 2: Check whether grease or the like

remains on each roller. If it does,
wipe it.

3 - J - 3

PAPER FEED UNITS OF TRAYS 1 AND 2

[6] Removing and Reinstalling the

Double Feed Prevention Roller

a. Procedure

(1) Draw out paper feed tray 1.
(2) Raise the paper feed roller unit straight up.
(3) Remove the two screws to detach the inner

cover.

Inner cover

Screws (2)

3 DIS./ASSEMBLY

(4) Remove the two screws to detach the double

feed prevention roller.

(5) Remove the retaining ring to detach the double

feed prevention shaft with roller.

(6) Slide the double feed prevention roller out of the

shaft.

Painting mark

Double feed prevention
roller rubber

Paper feed
roller unit

Retaining ring

(7) Reinstall the above parts following the removal

steps in reverse.
Caution 1: When reinstalling the double feed

prevention roller, pay attention to
their orientation.

Caution 2: Check whether grease or like

remains on the double feed
prevention roller. If it does, wipe it.

Double feed
prevention
roller

Screws (2)

3 - J - 4

PAPER FEED UNITS OF TRAYS1 AND 2

[7] Replacing the Pre-registration and

the Feed Clutches (MCs)

a. Procedure

(1) Draw out paper tray 1.
(2) Remove four screws to detach the paper convey-

ance cover.

Screw

(3) Disconnect the two connectors (CN261, CN260).
(4) Remove the retaining ring to detach the pre-

registration MC1 (MC4) / the pre-registration MC2
(MC6) and the feed MC1 (MC3) / the feed MC2
(MC5).

Paper conveyance

cover

Screw

[8] Removing and Reinstalling the Up/

Down Unit

a. Procedure

(1) Draw out paper feed tray 1.
(2) Remove the front cover of the tray.
(3) Disconnect the connector (CN264).
(4) Remove the two screws to detach the up/down

unit.

Connector (CN264)

Screws (2)

Up/down unit

(5) Reinstall the above parts following the removal

steps in reverse.

3 DIS./ASSEMBLY

Detent

Feed MC1
(MC3)
Feed MC2
(MC5)

Retaining
ring

Connector
(CN260)

Pre-registration
MC1 (MC4)
Pre-registration
MC2 (MC6)

Connector
(CN261)

Retaining ring

Detent

(5) Reinstall the above parts following the removal

steps in reverse.
Caution: When reinstalling each MC, fit the

detent in the slit in the MC.

3 - J - 5

PAPER FEED UNITS OF TRAYS 1 AND 2

[9] Replacing the Up/Down Plate Wires

Caution 1: This section explains how to replace the rear wires. To replace the front wires, remove the

front cover of tray and paper up/down unit. The replacement procedure is the same as that
for the rear wires.

Caution 2: When replacement or reinstallation of the wires is complete, check whether the up/down

plate moves up and down smoothly by rotating the up/down plate drive pulley by hand.

Caution 3: Be sure to install wires so that they do not cross nor ride over each other.

Caution 4: After installing the wires, adjust inclination of the up/down plate.

<Removing Wires>

(1) Remove the up/down unit.
(2) Draw out paper feed tray 1/2.

(2)(4) Remove the retaining
ring to detach the wire
regulation cover and pulley.

Wire
regulation
cover

3 DIS./ASSEMBLY

Wire A
(Black)

(1) Remove the E-ring to slide
out the drive pulley.

Wire D

Wire C

Drive pulley

E-ring

Wire C

Wire B
(Black)

(3) Remove
wire C.

Pulley

Retaining ring

Wire D

(5) Remove wire D.

Wire D

Wire C

3 - J - 6

<Wire Lengths>

PAPER FEED UNITS OF TRAYS1 AND 2

Wire A, C

Wire B, D

<Installing Wires>

207.5 mm (trays 1, 2)

497.5 mm (trays 1, 2)

Wire
regulation
cover

Wire A, C: 207.5±1 mm
Wire B, D: 497.5±1 mm

(2) Install the pulley, pass wire D through the

pulley, and install the wire restraining cover
and retaining ring.

(4) Install the pulley, pass wires D and C, and

install the wire restraining cover and re­taining ring. Wire D must be inside. Wires
should not cross nor ride over each other.

Wire regulation
cover

3 DIS./ASSEMBLY

Pulley

Retaining ring

Wire A
(Black)

(5) Install wires D and C

from inside the drive
shaft hole and push in
the drive pulley.

Wire D

Wire C

Drive pully

E-ring

Wire B (Black)

(3) Pass wire C

Wire C

Fixing plate A

through the
wire fixing
plate A.

Pully

Wire D

Retaining ring

Fixing plate B

(1) Pass wire D through the wire fixing

plate B.

Wire D

Wire C

3 - J - 7

TRAY 3 PAPER FEED UNIT

TRAY 3 PAPER FEED UNIT

[1] Removing and Reinstalling the

Paper Feed Tray 3

Warning: When removing the tray, stand

in a proper position so that you
do not hurt your back and waist.
If the tray contains paper,
remove all paper before
removing the tray.

Caution: Be sure the power cor d has been

unplugged from the wall outlet.

a. Procedure

(1) Open the front left and right doors.
(2) While pressing the tray release lever (at the left)

inward, draw out the tray.

(3) Remove the four screws and remove the tray with

it lifted.

Release lever

[2] Removing and Reinstalling the Front

Cover of Paper Tray 3

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Draw out paper feed tray 3.
(2) Remove the five screws to remove the front cover

of tray.
Caution: The front cover and main body of the

tray are connected with a wiring
harness of the handle release PS3
(PS16). Remove the tray front cover
from the main body carefully so as not
to break the wiring harness.

(3) Disconnect the handle detection PS connector

(CN282).
Caution: When reinstalling the front cover,

connect the handle detection PS
connector without fail. If y ou f orget to
connect it, you cannot draw out any
tray.

3 DIS./ASSEMBLY

steps in reverse.

Screws (4)

Tray 3

Connector (CN282)

Screws (2)

(4) Reinstall the above parts following the removal

steps in reverse.(4) Reinstall the above parts following the removal

Tray front cover

Screws (2)

Screw (1)

Handle release PS3
(PS16)

3 - K - 1

TRAY 3 PAPER FEED UNIT

[3] Cleaning the Paper Dust Removing

Brush

a. Procedure

(1) Draw out paper feed tray 3.
(2) Release the two latches to detach the paper dust

removing brush.
(3) Clean the paper dust removing brush with the

cleaning pad and blower brush.

Paper dust removing brush

3 DIS./ASSEMBLY

Latches

[4] Cleaning the Paper Pre-registration

PS/the Paper Feed PS

a. Procedure

(1) Draw out paper feed tray 3.
(2) Clean the paper pre-registration PS3 (PS52)/ the

paper feed PS3 (PS51) with a blower brush.

Paper pre-registration PS3
(PS 52)

Paper feed PS3
(PS51)

Clean these
sensors.

(View from below)

3 - K - 2

TRAY 3 PAPER FEED UNIT

[5] Removing and Reinstalling the

Paper Feed Roller and the Feed
Roller

a. Procedure

(1) Draw out tray 3.
(2) Remove the two retaining rings and slide the two

bearings outward to detach the paper feed roller
unit.

Retaining
ring

Bearing

Paper pick-up
roller unit

Bearing

Retaining
ring

(3) Remove the following parts from the paper feed

roller unit to remove individual rollers:

• Retaining rings (3)

• Bearing (1)

• Paper feed reference actuator

• Shafts (2)

• Fixing plate

Painting mark

Feed roller

Fixing
plate

Retain­ing ring

Paper pick­up
reference
actuator

Paper pick­up roller

Bearing
Retaining
ring

3 DIS./ASSEMBLY

(4) Reinstall the above parts following the removal

steps in reverse.
Caution 1: When reinstalling rollers, pay

attention to their orientation.

Caution 2: Check whether grease or like

remains on each roller. If it does,
wipe it.

3 - K - 3

TRAY 3 PAPER FEED UNIT

[6] Removing and Reinstalling the

Double Feed Prevention Roller

a. Procedure

(1) Draw out paper feed tray 3.
(2) Raise the paper feed roller unit straight up.
(3) Remove the three screws to detach the inner

cover.

Inner cover

Screws (3)

3 DIS./ASSEMBLY

(4) Remove the two screws to detach the double

feed prevention roller unit.

(5) Remove the retaining ring to detach the double

feed prevention roller shaft with roller.

(6) Slide the double feed prevention roller out of the

shaft.

Painting mark
Double feed
prevention
roller

Paper feed
roller unit

Retaining ring

(7) Reinstall the above parts following the removal

steps in reverse.
Caution 1. When reinstalling the roller, pay

attention to its orientation.

Caution 2. Check whether grease or the like

remains on double feed pre vention
roller. If it does wipe it.

Double feed
prevention
roller

Screws (2)

3 - K - 4

TRAY 3 PAPER FEED UNIT

[7] Replacing the Pre-registration MC3

(MC8) and the Feed MC3 (MC7)

a. Procedure

(1) Draw out paper tray 3.
(2) Remove the four screws to detach the paper

conveyance cover.

Screw

(3) Disconnect the two connectors (CN278, CN277).
(4) Remove the retaining ring to detach the pre-

registration MC3 (MC8) and the feed MC3 (MC7).

Paper conveyance

cover

Screw

Detent

[8] Removing and Reinstalling the Up/

Down Unit

a. Procedure

(1) Draw out paper feed tray 3.
(2) Remove the front cover of the tray.
(3) Disconnect the connector (CN281).
(4) Remove the two screws to detach the up/down

unit.

Connector (CN281)

Screws (2)

Up/down unit

(5) Reinstall the above parts following the removal

steps in reverse.

3 DIS./ASSEMBLY

Feed MC3
(MC7)

Retaining
ring

Connector
(CN277)

Pre-registration
MC3 (MC8)

Connector
(CN278)

Retaining ring

Detent

(5) Reinstall the above parts following the removal

steps in reverse.
Caution: When reinstalling each MC, fit the

detent in the slit in the MC.

3 - K - 5

TRAY 3 PAPER FEED UNIT

[9] Replacing the Up/Down Plate Wires

Caution 1: This section explains how to replace the rear wires. To replace the front wires, remove the

front cover of tra y and paper up/down unit. The replacement procedure is the same as that f or
the rear wires.

Caution 2: When replacement or reinstallation of the wires is complete, check whether the up/down

plate moves up and down smoothly by rotating the up/down plate drive pulley by hand.

Caution 3: Be sure to install wires so that they do not cross nor ride over each other.
Caution 4: After installing the wires, adjust inclination of the up/down plate.

<Wire Lengths>
<Removing wires>

(1) Remove the up/down unit.
(2) Draw out paper feed tray 3.

(2)(4) Remove the
retaining ring to detach the
wire regulation cover and
pulley.

Wire regulation
cover

3 DIS./ASSEMBLY

Wire A

(Black)

(1) Remove the E-ring to slide
out the drive pulley.

Wire D

Wire C

Drive pulley

E-ring

Wire C

Wire B

(Black)

(3) Remove
wire C.

Pulley

Retaining ring

Wire D

(5) Remove wire D.

Wire D

Wire C

3 - K - 6

Wire A, C: 309±1 mm

309 mm (tray 3)

Wire A, C

Wire B, D

Wire
regulation
cover

Pulley

Retaining ring

599 mm (tray 3)

Wire B (Black)

TRAY 3 PAPER FEED UNIT

Wire B, D: 599±1 mm

<Installing Wires>

(2) Install the pulley, pass wire D through the

pulley, and install the wire restraining cover
and retaining ring.

(4) Install the pulley, pass wires D and C, and

install the wire restraining cover and re­taining ring. Wire D must be inside. Wires
should not cross nor ride over each other.

Wire regulation cover

3 DIS./ASSEMBLY

Wire A

(Black)

Wire C

(5) Install wires D and C

from inside the drive
shaft hole and push in

the drive pulley.

Wire D

Wire C

Drive pully

E-ring

(3) Pass wire C

Fixing plate A

(1) Pass wire D through the wire fixing

through the
wire fixing
plate A.

Pully

Wire D

Fixing plate B

plate B.

Wire D

Retaining ring

Wire C

3 - K - 7

BY-PASS TRAY

BY-PASS TRAY

[1] Removing and Reinstalling the By-

pass Tray

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Remove the right side cover (upper). (See "EX-

TERNAL SECTION.")
(2) Disconnect the connector (CN254).
(3) Remove the four screws to remove the by-pass

tray.

Connector (CN254)

[2] Cleaning the Paper Size Detection

Sensors

a. Procedure

(1) Open the bypass tray.
(2) Clean the two paper size sensors (PS55, PS56)

with a blower brush.

Paper size sensor 1
(PS55)

Paper size sensor 2
(PS56)

3 DIS./ASSEMBLY

Screws (4)

By-pass tray

(4) Reinstall the above parts following the removal

steps in reverse.

3 - L - 1

BY-PASS TRAY

[3] Replacing the Paper Feed Roller/the

Feed Roller Rubbers

a. Procedure

(1) Remove the by-pass tray.
(2) Remove the two retaining rings and slide the two

bearings outward to remove the roller assembly.

Roller
assembly

Bearings

3 DIS./ASSEMBLY

Retaining rings

[4] Replacing the Double Feed

Prevention Roller Rubber

a. Procedure

(1) Remove the by-pass tray and place the tray

upside down.

(2) Remove the spring and retaining ring to remove

the double feed prevention roller together with
the shaft.
Caution: There are three spring mounting

holes. Engage the spring with the hole
at the center.

Spring mounting
hole

Spring

Retaining
ring

(3) Remove the three retaining rings from the roller

subassembly to remove rollers.

Painting mark

Retaining ring

Paper feed
roller

Feed roller

Feed roller rubber

Paper feed
roller rubber

Retaining ring

(4) Reinstall the above parts following the removal

steps in reverse.
Caution: When reinstalling the rollers, pay

attention to their orientation and
position.

Double feed
prevention roller

shaft

(3) Remove the retaining ring to pull the double feed

prevention roller from the shaft.

<Installation>

Painting mark

shaft

Double feed prevention roller

Retaining ring

Double feed prevention
roller rubber

(4) Reinstall the above parts following the removal

steps in reverse.
Caution: When reinstalling the roller, pay

attention to its orientation.

3 - L - 2

VERTICAL CONVEYANCE SECTION

VERTICAL CONVEYANCE SECTION

[1] Removing and Reinstalling the

Vertical Conveyance Section

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Remove the right side cover (lower). (See "EX-

TERNAL SECTION.")
(2) Disconnect the connector (CN253).
(3) Remove the four screws to remove the vertical

conveyance section.

Connector (CN253)

[2] Removing and Reinstalling the

Vertical Conveyance MC (MC9,
MC10)

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Remove the vertical conveyance section.
(2) Remove two retaining rings to detach two gears.
(3) Disconnect the two connectors (CN290, CN291)

to remove the wiring harness from the wring
harness guide.

(4) Remove the two retaining rings to detach clutches.

Caution: When reinstalling the vertical

conveyance MCs clutches, be sure to
fit the detent in the slit in the clutch.

Connector (CN290)

Connector (CN291)

3 DIS./ASSEMBLY

Screws (4)

Vertical conveyance
section

(4) Reinstall the above parts following the removal

steps in reverse.

Caution: When installing the vertical

conveyance section, secure the
section by four screws with its door
closed.

Vertical conveyance
door

Gear

Retaining
rings

Vertical Conveyance
MC1 (MC9)

Detent

Vertical
Conveyance
MC2 (MC10)

Retaining ring

MC

3 - M - 1

(5) Reinstall the above parts following the removal

steps in reverse.

VERTICAL CONVEYANCE SECTION

[3] Replacing the Vertical Conveyance

Roller (Upper)

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Remove the vertical conveyance section.
(2) Remove the E-ring to remove the gear and pin.
(3) Remove the two E-rings to move the bearing

outward.

(4) Remove the vertical conveyance roller (upper).

Bearing

E-ring

Pin

3 DIS./ASSEMBLY

[4] Removing and Reinstalling the

Vertical Conveyance Rollesrs
(Middle/Lower)

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Remove the vertical conveyance section.
(2) Remove vertical MCs 9 and 10.
(3) Remove the two E-rings to move the bearing.
(4) Remove the vertical conveyance rollers (middle/

lower) together with the shaft.

E-ring

Caution: This illustration shows how to remove

the vertical conveyance roller (middle).
Remove the vertical conveyance roller
(lower) in the same manner.

E-ring

Bearings

Gear

E-ring

Caution: Install the gear with the shaft pin fit into

the groove at the back of the gear.

Vertical
conveyance roller

Gear

Pin

(5) Reinstall the above parts following the removal

steps in reverse.

Vertical conveyance
roller (lower)

E-ring

Vertical conveyance
roller (middle)

(5) Reinstall the above parts following the removal

steps in reverse.

3 - M - 2

[5] Cleaning the Vertical Conveyance

PS/Loop PS

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Remove the vertical conveyance unit.
(2) Clean the vertical conveyance PS (PS53) and

loop PS (PS54) using a blower brush.

Loop PS (PS54)

VERTICAL CONVEYANCE SECTION

Vertical conveyance PS
(PS53)

(3) Reinstall the above parts following the removal

steps in reverse.

3 DIS./ASSEMBLY

3 - M - 3

ADU UNIT

ADU UNIT

[1] Drawing out and Reinstalling the

ADU Stand

Caution: Be sure the power cor d has been

unplugged from the wall outlet.

Warning: The interlock which is turned off

when the front right or left door
opens/closes, should never
been turned on forcibl y with the
ADU stand drawn out.

a. Procedure

(1) Open the front right and left doors.
(2) With the solenoid release lever under the ADU

stand pushed to the left, turn down the ADU

drawing lever to the right.
(3) Gripping the ADU stand drawing lever, draw out

the ADU stand.

ADU stand

ADU stand drawing lever

[2] Cleaning the Paper Dust Removing

Brush for Registration Roller

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

a. Procedure

(1) Draw out the ADU stand from the main body.
(2) Slide the paper dust removing lever to the right,

then pull it out to detach the paper dust removing
brush.

Paper dust removing lever

3 DIS./ASSEMBLY

Front right door

Front left door

Solenoid release lever

(4) To reinstall the ADU stand, push in the ADU

stand and then turn the ADU stand drawing lever

upright.

ADU stand

(3) Using a blower brush, clean the paper dust

removing brush for the registration roller.

Paper dust removing brush for
registration roller

Cleaning area

(4) Reinstall the above parts following the removal

steps in reverse.

3 - N - 1

ADU UNIT

[3] Cleaning the Paper Dust Removing

Brushes for the Registration Roller

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Warning: The interlock which is turned

OFF when the front right or left
door opens/closes, should
never been turned ON forcibly
with the ADU stand drawn out.

a. Procedure

(1) Draw out the ADU stand from the main body.
(2) Press the projections (two for each brush) to

release the paper dust removing three brushes
for registration roller, then detach them.

Paper dust removing brush for registration roller

3 DIS./ASSEMBLY

[4] Cleaning PS44 (Registration PS)

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Warning: The interlock which is turned

OFF when the front right or left
door opens/closes, should
never been turned ON forcibly
with the ADU stand drawn out.

a. Procedure

(1) Draw out the ADU stand from the main body.
(2) Remove the two screws to release the sensor

bracket.

Screws

ADU stand

Projections

(3) Clean the paper dust removing brushes for

registration roller using a blower brush.

Paper dust removing brush
for registration roller

Cleaning area

(4) Reinstall the above parts following the removal

steps in reverse.

ADU stand

Sensor bracket

(3) Turn the sensor bracket upside down and clean

registration PS (PS44) with a drum cleaner or
cleaning pad.

Registration PS (PS44)

Sensor bracket

(4) Reinstall the above parts following the removal

steps in reverse.

3 - N - 2

ADU UNIT

[5] Cleaning Paper Mis-centering PS

(PS1)/Leading Edge Detection PS

(PS45)

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Warning: The interlock which is turned off

when the front right or left door
opens/closes, should never
been turned on forcibl y with the
ADU stand drawn out.

a. Procedure

(1) Draw out the ADU stand from the main body.
(2) Open the pre-transfer jam handler. Clean paper

mis-centering PS (PS1) and leading edge

detection PS (PS45) at the rear of the pre-transfer

jam handler using a drum cleaner or cleaning

pad.

Pre-transfer jam handler

Leading edge
detection PS
(PS45)

[6] Cleaning Paper Reverse PS (PS57)/

ADU Deceleration PS (PS59)

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Warning: The interlock which is turned off

when the front right or left door
opens/closes, should never
been turned on forcibly with the
ADU stand drawn out.

a. Procedure

(1) Draw out the ADU stand from the main body.
(2) Using a blower brush, clean the paper reverse PS

(PS57) through the sensor window at the top of

paper reverse paper exit roller 1.
(3) Open the ADU conveyance unit guide A.
(4) Using a drum cleaner or cleaning pad, clean the

ADU deceleration PS (PS59) through the sensor

window at the right of ADU horizontal conveyance

roller 2.

Window for paper reverse PS (PS57)

3 DIS./ASSEMBLY

ADU stand

Paper mis-centering PS
(PS 1)

(3) Reinstall the above parts following the removal

steps in reverse.

Window for ADU deceleration PS
(PS59)

Reverse paper
exit roller 1

ADU horizontal conveyance roller 2

Movable guide A

(5) Reinstall the above parts following the removal

steps in reverse.

3 - N - 3

ADU UNIT

[7] Removing and Reinstalling the ADU

Cover

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Warning: The interlock which is turned off

when the front right or left door
opens/closes, should never
been turned on forcibly with the
ADU stand drawn out.

a. Procedure

(1) Draw out the ADU stand from the main body.
(2) Open the ADU paper conveyance unit guide A.
(3) Remove the screw to remove the ADU stand

drawing lever.

ADU stand drawing lever

3 DIS./ASSEMBLY

(4) Loosen the four screws to detach the ADU cover.

Screws (loosen)

ADU stand

Screw (loosen)

(5) Reinstall the above parts following the removal

steps in reverse.

Screw

ADU paper
conveyance unit
guide A

3 - N - 4

ADU UNIT

[8] Removing and Reinstalling

Registration MC (MC1)

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Warning: The interlock which is turned off

when the front right or left door
opens/closes, should never
been turned on forcibl y with the
ADU stand drawn out.

a. Procedure

(1) Draw out the ADU stand from the main body.
(2) Detach the ADU cover.
(3) Loosen the setscrew to remove the registration

roller rotation knob.

Registration MC

Setscrew (loosen)

(MC1)

(5) Remove the retaining ring to detach registration

MC (MC1).

Caution: When reinstalling MC1, pay attention

to the position of the stopper.

Registration MC (MC1)

Stopper

Relay connector (CN565) Retaining ring

(6) Reinstall the above parts following the removal

steps in reverse.

3 DIS./ASSEMBLY

Registration roller rotation knob

(4) Disconnect the relay connector (CN565).

Caution: Each relay connector consists of two

plugs and one socket. Be sure to
remove only one plug (shown below)
of the CN565 connector.

3 - N - 5

ADU UNIT

[9] Removing and Reinstalling ADU

Pre-registration MC (MC2)

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Warning: The interlock which is turned off

when the front right or left door
opens/closes, should never
been turned on forcibly with the
ADU stand drawn out.

a. Procedure

(1) Draw out the ADU stand from the main body.
(2) Detach the ADU cover.
(3) Disconnect the relay connector (CN564).

Caution: Each relay connector consists of two

plugs and one socket. Be sure to
remove only one plug (shown below)
of the CN564 connector.

(4) Remove the retaining ring to detach ADU pre-

registration MC (MC2).

Caution: When reinstalling MC2, pay attention

3 DIS./ASSEMBLY

to the position of the stopper.

[10] Removing and Reinstalling the

Second Paper Feed Unit

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Warning: The interlock which is turned off

when the front right or left door
opens/closes, should never
been turned on forcibly with the
ADU stand drawn out.

a. Procedure

(1) Draw out the ADU stand from the main body.
(2) Detach the ADU cover.
(3) Disconnect the three relay connectors (CN565,

568, 569).
Caution: Each relay connector consists of two

plugs and one socket. Be sure to
remove only one plug (shown below)
of each connector.

Relay connector
(CN565)

Registration MC
(MC1)

Stopper

Relay connector

Retaining ring

ADU pre-registration MC (MC2)

(CN564)

(6) Reinstall the above parts following the removal

steps in reverse.

3 - N - 6

Relay connector
(CN568)

Relay connector
(CN569)

Stopper

ADU UNIT

(4) Remove the four screws to remove the second

paper feed unit.
Caution: When reinstalling the second paper

feed unit, pay attention to the position
of the stopper of second paper feed
MC (MC1).

Registration MC (MC1)

Screw

Screw

2nd paper feed unit

Screw

Screw

(5) Reinstall the above parts following the removal

steps in reverse.

[11] Removing and Reinstalling the ADU

Stand

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Warning 1: The interlock which is turned

off when the front right or left
door opens/closes, should
never been turned on forcib ly
with the ADU stand drawn out.

Warning 2: Removal and reinstallation of

the ADU stand belongs to the
work of carrying a heavy load,
so assistance of another
worker is required.

(1) Draw out the ADU stand from the main body.
(2) Remove the fixing unit. (See "FIXING UNIT.")
(3) Remove the transfer/separation corona unit. (See

"CORONA UNIT SECTION.")
(4) Remove the second paper feed unit.
(5) Remove the two screws to detach the connector

cover.

Connector cover

3 DIS./ASSEMBLY

3 - N - 7

Screws (2)

Reverse paper feed unit

(6) Disconnect the three relay connectors (CN540,

541, 542).

Caution: Each relay connector consists of two

plugs and one socket. Be sure to
remove only one plug (shown below)
of each connector.

ADU UNIT

(7) Remove the two screws to remove the cable arm

from the ADU stand.

Relay connector
(CN542)

Cable arm

Relay connector
(CN540)

Relay connector
(CN541)

(8) Remove the two screws securing the guide rail on

the paper feed side and remove the two screws

3 DIS./ASSEMBLY

securing the guide rails on the paper exit side.

(9) Remove the ADU stand upward with the second

paper feed side stay held by one worker and the
paper reverse/exit side stay held by the other
worker.

Caution: Must avoid placing the ADU

stand on a non flat place after
the removal. If it is placed on a
non flat place, its handle on the
open/close guide A may be
deformed.

Paper
reverse/exit
unit

2nd paper feed side stay

<Paper feed side>

Guide rail

Paper reverse/exit side
stay

Screws

Guide rail

Screws

<Paper exit side>

(10)Reinstall the above parts following the removal

steps in reverse.

3 - N - 8

ADU UNIT

[12] Removing and Reinstalling the

Registration Roller

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Warning: The interlock which is turned off

when the front right or left door
opens/closes, should never
been turned on forcibl y with the
ADU stand drawn out.

a. Procedure

(1) Draw out the ADU stand from the main body.
(2) Remove the second paper feed unit.
(3) Remove the paper dust removing brush for

registration roller.

(4) Remove the registration MC (MC1).

Paper dust removing brush for
registration roller

Registration MC (MC1)

(6) Slide the registration roller to the front, then

remove it by lifting its rear end.

Bearing

E-ring

2

1

Registration roller

E-ring

Bearing

3 DIS./ASSEMBLY

Registration roller

2nd paper feed unit

(5) Remove the two E-rings (one at the left and the

other at the right) and one bearing from the
registration roller.

(7) Reinstall the above parts following the removal

steps in reverse.

3 - N - 9

ADU UNIT

[13] Removing and Reinstalling the

Registration Motor (M12) Assembly

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Warning: The interlock which is turned off

when the front right or left door
opens/closes, should never
been turned on forcibly with the
ADU stand drawn out.

a. Procedure

(1) Draw out the ADU stand from the main body.
(2) Remove the second paper feed unit. See [10]

Removing and Reinstalling the Second Paper

Feed Unit.
(3) Remove ADU pre-registration MC (MC2).
(4) Disconnect eight relay connectors (CN557, 564,

565, 568, 569, 575, 577).

Caution: Each relay connector consists of two

plugs and one socket. For CN564,
565, 568, and 569, one plug of each

3 DIS./ASSEMBLY

relay connector has already been
disconnected when removed the
second paper feed unit. At this point,
disconnect the other plug of these
connectors. For CN557, remove two
plugs. For CN575 and 577,
disconnect one plug shown below.

(5) Release the wiring harness from the registration

motor assembly and stay.
(6) Remove one screw to detach the stay.
(7) Remove the three screws to detach the registration

motor (M12) assembly.

Registration motor assembly

Stay

Screw

Screw

2nd paper feed unit
open/close guide A

(8) Reinstall the above parts following the removal

steps in reverse.

Relay connector (CN557)

Relay connector
(CN565)

Relay connector
(CN568)

Relay connector (CN569: Opposite side)

Relay connector
(CN557)

Relay connector
(CN575)

Movable
guide A

Relay connector
(CN577)

Relay
connector
(CN564)

3 - N - 10

ADU UNIT

[14] Removing and Reinstalling the Loop

Roller, ADU Paper Exit Roller, and
Pre-registration Roller

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Warning: The interlock which is turned off

when the front right or left door
opens/closes, should never
been turned on forcibl y with the
ADU stand drawn out.

a. Procedure

(1) Draw out the ADU stand from the main body.
(2) Remove the registration motor assembly. See

[13] Removing and Reinstalling the Registration
Motor (M12) Assembly.

(3) Open the second paper feed unit open/close

guide A.
(4) Remove the E-ring and spacer from each gear.
(5) Detach the timing belt.
(6) Remove the loop roller pulley and pull the pin

from the shaft.
(7) Remove the ADU paper exit roller pulley and pull

the pin from the shaft.

Loop roller pulley

(9) Remove the two screws to release the bearing

fitting.

(10)Pull out the loop roller, ADU paper exit roller, and

pre-registration roller.

Screw

Screw

Bearing

Loop roller

ADU paper
exit roller

Bearing fitting

Pre-registration

Screw

roller
Bearing

(11)Remove the two E-rings and one bearing from

the loop roller.

3 DIS./ASSEMBLY

Pin

Spacer

E-ring

Spacer

E-ring

ADU paper exit
roller pulley

Timing belt

Pin

(8) Remove the two screws to slide the loop roller

and ADU paper exit roller bearings to the front.

Bearing

E-ring

Loop roller

E-ring

3 - N - 11

ADU UNIT

(12)Remove the two E-rings and one bearing from

the ADU paper exit roller.

E-rings

Bearing

ADU paper exit roller

(13)Remove the four E-rings, two bearings and one

bearing fitting from the pre-registration roller.

3 DIS./ASSEMBLY

[15] Removing and Reinstalling the Pre-

transfer Roller and Pre-registration
Loop Roller

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Warning: The interlock which is turned

OFF when the front right or left
door opens/closes, should
never been turned ON forcibly
with the ADU stand drawn out.

a. Procedure

(1) Draw out the ADU stand from the main body.
(2) Remove the registration motor assembly. See

[13] Removing and Reinstalling the Registration
Motor (M12) Assembly.

(3) Remove the two screws to detach the transfer

roller drive motor (M9) assembly.

Screw

Bearing fitting

Bearing

Bearing

E-rings

E-rings

Pre-registration roller

(14)Reinstall the above parts following the removal

steps in reverse.

Screw

Transfer roller drive motor
assembly

3 - N - 12

ADU UNIT

(4) Disconnect eight relay connectors (CN561, 567,

574, 576, 587, 593).

Caution: Each relay connector (CN567, 574,

576, 593) consists of two plugs and
one socket. For CN576 and 593,
disconnect two plugs from each
connector. For other connectors,
disconnect one plug from each

connector as shown below.
(5) Release the wiring harness from the stay.
(6) Remove the three screws to detach the stay.

Relay connector (CN567)

Relay connector (CN576)

Stay

Relay
connector
(CN587)

Screw

Relay connector
(CN574)

Relay connector (CN576)

Relay
connector
(CN593)

Relay
connector
(CN561)

Screws

Relay
connector
(CN593)

(8) Remove one E-ring from the pre-transfer roller to

detach the gear.

(9) Remove one E-ring from the pre-registration loop

roller to detach one spacer.

E-ring

Spacer

E-ring

Pre-transfer roller

Gear

Pre-registration loop
roller

(10) Remove one pin, one E-ring, and one spacer

from the pre-transfer roller.
(11)Detach the timing belt.
(12)Remove the pre-transfer roller pulley and pre-

registration loop roller pulley.

Pulley

E-ring

Spacer

3 DIS./ASSEMBLY

(7) Remove the two screws to remove the ADU lock

solenoid assembly.

Screws

ADU lock solenoid
assembly

Pre-transfer
roller

Pre-regstration
loop roller

Pin

Timing belt

Pulley

3 - N - 13

ADU UNIT

(13)Pull one pin from each roller.
(14)Remove the two screws to slide the pre-transfer

roller bearing to the front, and remove the two
screws to slide the pre-registration loop roller
pulley to the front.

(15)Slide the pre-transfer roller shaft toward the front

side, and release the shaft's rear side first, then
hold and pull out the shaft's front side by sliding
its rear side upward.

(16)Remove the pre-registration loop roller shaft by

pulling it out from the mount bracket.

Screws

Pin

3 DIS./ASSEMBLY

Bearing

Bearing

Pin

(18)Remove the two E-rings from the pre-registration

loop roller.

E-ring

Pre-registration loop
roller

(19)Reinstall the above parts following the removal

steps in reverse.

Pre-registration Loop roller

Screws

(17) Remove the two E-rings from the pre-transfer

roller.

E-ring

Pre-transfer roller

3 - N - 14

ADU UNIT

[16] Removing and Reinstalling the ADU

Reverse Roller

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Warning: The interlock which is turned off

when the front right or left door
opens/closes, should never
been turned on forcibl y with the
ADU stand drawn out.

a. Procedure

(1) Draw out the ADU stand from the main body.
(2) Disconnect the two relay connectors (CN531,

562).
Caution: Each relay connector consists of two

plugs and one socket. Disconnect one
plug from each connector as shown
below.

(3) Remove the three screws to detach the jam

indicator board assembly.

Screws

Relay connector
(CN562)

(5) Remove the three screws to detach the ADU

reverse motor (M7) assembly.

Relay connector
(CN553)

ADU reverse motor
assembly

Screws

Connector (CN523)

(6) Remove one E-ring to detach the idle gear.
(7) Remove one E-ring to detach the ADU reverse

roller gear.

3 DIS./ASSEMBLY

Jam indicator board
assembly

Relay connector
(CN531)

(4) Disconnect one relay connector (CN553) and

one connector (CN523).
Caution: The relay connector (CN553) consists

of two plugs and one socket.
Disconnect one plug shown below.

Idle gear

Gear

ADU reverse roller

E-rings

(8) Pull the pin from the ADU reverse roller.
(9) Remove the two screws and slide the bearing to

remove it.

3 - N - 15

ADU UNIT

(10)Pull out the ADU reverse roller.

Screw

Bearing

Pin

ADU reverse roller

(11)Remove the two E-rings from the ADU reverse

roller.

3 DIS./ASSEMBLY

E-rings

[17] Removing and Reinstalling the ADU

Stand Drive Board Assembly

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Warning: The interlock which is turned

OFF when the front right or left
door opens/closes, should
never been turned ON forcibly
with the ADU stand drawn out.

a. Procedure

(1) Draw out the ADU stand from the main body.
(2) Disconnect the two relay connectors (CN531,

562).
Caution: Each relay connector consists of two

plugs and one socket. Disconnect one
plug from each connector as shown
below.

(3) Remove the three screws to detach the jam

indicator board assembly.

Screw

Relay connector
(CN562)

ADU reverse roller

(12)Reinstall the above parts following the removal

steps in reverse.

3 - N - 16

Relay connector (CN531)

Jam indicator board assembly

ADU UNIT

(4) Disconnect the fire relay connectors (CN523,

525, 559, 572, 573) .
Caution: Each relay connector consists of two

plugs and one socket. For CN525,
disconnect two plugs. For other relay
connectors, disconnect one plug from
each connector as shown below.

(5) Disconnect all the 11 connectors on the ADU

stand drive board.

Relay connector (CN559)

Relay connector

Relay connector (CN525)

Relay connector
(CN525)

ADU stand
drive board

Relay connector
(CN523)

(CN573)

Relay connector
(CN572)

[18] Removing and Reinstalling the ADU

Horizontal Conveyance Rollers 1

and 2

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Warning: The interlock which is turned off

when the front right or left door
opens/closes, should never
been turned on forcibly with the
ADU stand drawn out.

a. Procedure

(1) Draw out the ADU stand from the main body.
(2) Remove the ADU stand drive board assembly.
(3) Disconnect relay connector (CN553) and

connector (CN523).

Caution: The relay connector (CN553) consists

of two plugs and one socket.
Disconnect one plug shown below.

(4) Remove the three screws to detach the ADU

reverse motor (M7) assembly.

Relay connector
(CN553)

Screw

3 DIS./ASSEMBLY

(6) Release the wiring harness from the ADU stand

drive board assembly.

(7) Remove the four screws to detach the ADU stand

drive board assembly.

Screws

ADU stand drive board assembly

(8) Reinstall the above parts following the removal

steps in reverse.

ADU reverse motor
(M7) assembly

Connector (CN523)

3 - N - 17

ADU UNIT

(5) Disconnect eight relay connectors (CN561, 567,

574, 576, 587, 593).
Caution: Each relay connector (CN567, 574,

576, 593) consists of two plugs and
one socket. For CN576 and 593,
disconnect two plugs from each
connector. For other connectors,
disconnect one plug from each

connector as shown below.
(6) Release the wiring harness from the stay.
(7) Remove the three screws to detach the stay.

Relay connector (CN567)

Stay

Relay connector (CN576)

Relay connector (CN576)

Relay connector
(CN593)

3 DIS./ASSEMBLY

Relay
connector
(CN587)

Screws

Relay connector
(CN574)

Relay
connector
(CN561)

Relay connector (CN593)

Screw

(8) Open ADU horizontal conveyance unit open/

close cover A.

(9) Remove one E-ring and one spacer from each of

ADU horizontal conveyance rollers 1 and 2.
(10)Detach the timing belt.
(11) Remove pulley from each of ADU horizontal

conveyance rollers 1 and 2.

Pulley

Movable cover A

ADU horizontal
conveyance
roller 1

Timing belt

Spacer

E-ring

Pulley

ADU horizontal
conveyance
roller 2

(12)Remove the two screws and slide each bearing

forward to remove it.
(13)Pull out each roller.

ADU horizontal
conveyance roller 1

Bearing

Screws

ADU horizontal
conveyance roller 2

Bearing

Screws

3 - N - 18

ADU UNIT

(14)Remove the two E-rings from each roller.

E-rings

ADU horizontal paper tansport roller 1 or 2

(15)Reinstall the above parts following the removal

steps in reverse.

[19] Removing and Reinstalling the

Paper Reverse/Exit Rollers 1, 2, and
3

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Warning: The interlock which is turned

OFF when the front right or left
door opens/closes, should
never been turned ON forcibly
with the ADU stand drawn out.

a. Procedure

(1) Draw out the ADU stand from the main body.
(2) Remove the ADU stand drive board assembly.
(3) Open the paper reverse/exit unit.
(4) Loosen one setscrew to detach the reverse paper

exit roller rotation knob.

(5) Remove one E-ring and one spacer from each of

paper reverse/exit rollers 1 and 2.
(6) Detach the timing belt.
(7) Remove one pulley from each roller.
(8) Pull one pin out of each roller.

3 DIS./ASSEMBLY

Paper reverse/
exit roller
rotation knob

Setscrews

Spacer

E-ring

Spacer

Pulley

Timing belt

Paper reverse/
exit roller 1

Pulley

Paper reverse/
exit roller 2

Paper
reverse/exit
unit

Pins

Pulley

3 - N - 19

ADU UNIT

(9) Remove one E-ring to detach the idle gear.
(10)Remove one gear from paper reverse/exit roller

1 and remove one pin.

(11)Remove one E-ring from paper reverse/exit roller

3 and remove one spacer.
(12)Detach the timing belt.
(13)Remove one pulley from each of paper reverse/

exit rollers 2 and 3 and remove one pin.

Pulley

Pins

E-ring

Paper
reverse/exit
roller 2

Idle gear

Pin

Pulley

Paper
reverse/exit

roller 3
Timing
belt

Pin

3 DIS./ASSEMBLY

Paper
reverse/exit
roller 1

(16)Remove the two E-rings from paper reverse/exit

roller 1.

E-rings

Spacer

E-ring

Paper reverse/exit roller 1

(17)Remove the two E-rings from paper reverse/exit

roller 2.

Pulley

E-rings

(14)Remove two screws and slide the bearing to the

front to remove it.

(15)Pull out each roller.

Paper reverse/exit roller 1

Screws

Bearing

Paper reverse/exit
roller 3

Bearing

Screws

Screws

Bearing

Paper reverse/exit
roller 2

Paper reverse/exit roller 2

3 - N - 20

ADU UNIT

(18)Remove the two E-rings from paper reverse/exit

roller 3.

E-ring

Paper reverse/exit roller 3

(19)Reinstall the above parts following the removal

steps in reverse.

[20] Removing and Reinstalling the

Paper Reverse/Exit Unit Entrance
Roller

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Warning: The interlock which is turned off

when the front right or left door
opens/closes, should never
been turned on forcibly with the
ADU stand drawn out.

a. Procedure

(1) Draw out the ADU stand from the main body.
(2) Hold the paper reverse/exit unit down toward left.
(3) Remove one E-ring to detach the one-way clutch.

Caution: When reinstalling the one-way clutch,

pay attention to the marking.

(4) Remove the two screws to slide one bearing to

the rear side.

(5) Pull out the paper reverse/exit unit entrance

roller.

3 DIS./ASSEMBLY

Screws

One-way
clutch

E-ring

Paper reverse/exit unit entrance roller

Stamp

Bearing

3 - N - 21

ADU UNIT

(6) Remove the three E-rings and one bearing from

the paper reverse/exit unit entrance roller.

E-ring

Paper reverse/exit unit
entrance roller

(7) Reinstall the above parts following the removal

steps in reverse.

3 DIS./ASSEMBLY

E-rings

Bearing

[21] Removing and Reinstalling the

Paper Reverse/Exit Switchover Gate

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Warning: The interlock which is turned

OFF when the front right or left
door opens/closes, should
never been turned ON forcibly
with the ADU stand drawn out.

a. Procedure

(1) Draw out the ADU stand from the main body.
(2) Remove the two screws to detach the paper

reverse/exit unit cover.

Paper reverse/exit
unit cover

3 - N - 22

Screws

(3) Remove one screw to release the gate drive

fitting.

(4) Remove each E-ring and bearing from the front

and rear.

ADU UNIT

(5) Open the jam access guide plate to remove the

paper reverse/exit switchover gate.

Bearing

E-ring

E-ring

Bering

Gate drive
fitting

Movable guide plate

Paper
reverse/exit
switchover gate

Screw

(6) Reinstall the above parts following the removal

steps in reverse.
Caution: When installing the paper reverse/exit

switchover gate, must perform the
following adjustment.

1.5~2mm

Gate installation
adjustment
screws (2)

Reversal/paper exit

switchover gate
Paper guide
plate

3 DIS./ASSEMBLY

Loosen the two paper reverse/exit switchover
gate installation adjustment screws.
Stack fifteen plain papers (64g/m
them between the gate and the paper guide
plate, then tighten the adjustment screws.

2

) and insert

3 - N - 23

ADU UNIT

[22] Removing and Reinstalling the

Paper Exit Roller

Caution: Be sure the power cord has

been unplugged from the wall
outlet.

Warning: The interlock which is turned

OFF when the front right or left
door opens/closes, should
never been turned ON forcibly
with the ADU stand drawn out.

a. Procedure

(1) Remove the left side cover. (See "EXTERNAL

SECTION.")
(2) Draw out the ADU stand from the main body.
(3) Remove the four screws to detach the paper exit

unit.
(4) Disconnect one relay connector (C177) in the

paper exit unit.

Caution: Each relay connector consists of two

plugs and one socket. For CN177,

3 DIS./ASSEMBLY

disconnect only the plug shown below .

(7) Remove the paper exit roller from the paper exit

unit.

Stamp

M

A

R

N

E

Y

E-ring

G

Bering

Gear

Bearing

Paper exit roller

Paper exit unit

E-rings

(8) Reinstall the above parts following the removal

steps in reverse.

Relay connector (CN177)

Screws

Paper exit unit

Screws

(5) Remove one E-ring to detach the gear.

Caution: When installing the gear, pay attention

to the orientation of the marking on
the gear.

(6) Remove the three E-rings to detach the left

bearing and right bearing.

3 - N - 24

FIXING UNIT

FIXING UNIT

[1] Removing and Reinstalling the

Fixing Unit

Caution 1: Be sure the power cord has

been unplugged from the wall
outlet.

Caution 2: Do not touch the fixing unit

immediately after turning OFF
the main switch because it is
very hot and you may suffer
burns. Wait until the fixing unit
has cooled down sufficiently
before working on it.

a. Procedure

(1) Draw out the ADU stand. (See "ADU UNIT.")
(2) Remove the two screws to detach the fixing unit

front cover.
(3) Open the paper reverse/exit unit.
(4) Remove one screw to detach the inlet guide plate

push-down lever.
(5) Remove one screw to draw out the fixing unit.

Then, remove it upward.

Fixing unit

Screw

Screw

Inlet guide plate
push-down lever

Fixing unit
front cover

[2] Removing and Reinstalling the

Fixing Unit Top Cover

Caution: Before opening the fixing unit

top cover, be sure to rotate the
pressure release shaft in order
to release the lower roller
(pressure roller) pressured to
contact to the upper roller (heat
roller for fusion).
After closing the fixing unit top
cover, rotate the pressure
release shaft in the opposite
direction to apply pressure to
the lower roller.

a. Procedure

(1) Draw out the ADU stand. (See "ADU UNIT.")
(2) Insert a screwdriver or the like in the hole in the

pressure release shaft and rotate the pressure
release shaft to release pressure.
Caution: Perform pressure release with the

fixing unit top cover closed.

(3) Remove the four screws to open the fixing unit

top cover.

(2) Remove four screws.

Fixing unit top cover

3 DIS./ASSEMBLY

Screws (2)

Paper reverse/exit
unit (open)

(6) Reinstall the above parts following the removal

steps in reverse.

3 - O - 1

Fixing paper
exit unit

Pressure
release shaft

(4) Close the fixing unit top cover following the opening

steps in reverse.
Caution: When the fixing unit top cover has

been closed and secured with the four
screws, pressure must be applied to
it without fail.

(1)
Release pressure.

FIXING UNIT

[3] Replacing the Cleaning Web

a. Procedure

(1) Draw out the ADU stand. (See "ADU UNIT.")
(2) Open the fixing unit top cover.
(3) Remove the two screws to detach the cleaning

web unit.

Cleaning web unit

Pin

Screws (2)

3 DIS./ASSEMBLY

(4) Reinstall the above parts following the removal

steps in reverse.
Caution 1: When installing the cleaning web,

align the groove in the take-up gear
with the shaft pin on the unit,
keeping its tension.

Caution 2: After replacing the cleaning web,

make sure to reset the count value
of the fixing unit cleaning web by
"Copy Count by Parts to be
Replaced (Fixed Parts)" in the 25
mode.

Gear groove

[4] Replacing the Fixing Heater Lamps

(Upper/Roller) (L2, L3)

Caution: Do not touch the fixing heater

lamp with bare hands.

Caution 1: Install the heater lamp with the

maker mark indication side facing
front.

Caution 2: The heater lamp should not touch

the inner surface of the upper
roller.

Caution 3: When replacing a heater lamp, be

sure to insert the lamp end in the
lamp terminal securely.

a. Procedure

(1) Remove the fixing unit from the main body.
(2) Open the fixing unit top cover.
(3) Remove the two screws at the front to detach the

two wire harness clamps.
Caution: Install the wiring clamp screws

through the lower mounting holes. If
installed through a wrong mounting
hole, the fixing unit front cover cannot
be installed.

(4) Remove the two screws to detach the front lamp

fixing plate.

(5) Remove the two Faston terminals.

Front lamp fixing plate

Screws
(2)

3 - O - 2

Screws
(2)

Wiring
harness
clamps (2)

Faston
terminals (2)

Faston terminals (remove 2)

FIXING UNIT

(6) Remove the two screws at the back to detach two

wiring harness clamps.
(7) Remove the two Faston terminals at the back.

Wiring
harness
clamps (2)

Screws (2)

Faston terminals (2)

Faston terminals (remove 2)

(8) Pull out the fixing heater lamps (L2, L3) from the

front side of the fixing upper roller.

[5] Removing and Reinstalling the

Fixing Upper Roller

a. Procedure

(1) Remove the fixing unit from the main body.
(2) Release the fixing unit lower contact with the

upper roller.
(3) Open the fixing unit top cover.
(4) Remove the fixing upper roller heater lamps (L2,

L3).
(5) Remove the fixing upper roller upward.

Fixing upper
roller

3 DIS./ASSEMBLY

Heater lamps (L2, L3)

(9) Reinstall the above parts following the removal

steps in reverse.
Caution: When installing new lamps, pay

attention to their orientation. The size
of the lamp terminal mounting hole in
the front lamp fixing plate is different
from that in the rear lamp fixing plate.
The lamp inserted in the fixing upper
roller in the opposite direction cannot
be secured properly.

(6) Remove the two C-rings, two gears, two bearings,

and two insulating sleeves from the fixing upper

roller.

Caution: Reinstall the bearings and insulating

sleeves with their collar facing
outward.

collars

Gear (iron)

Gear (resin)

C-ring

Insulating sleeve

Bearing

Fixing upper
roller

Bearing

Insulating
sleeve

C-ring

collars

(7) Reinstall the above parts following the removal

steps in reverse.

3 - O - 3

FIXING UNIT

[6] Removing and Reinstalling the

Fixing Lower Roller

a. Procedure

(1) Remove the fixing upper roller.
(2) Remove one screw to detach the fixing knob.
(3) Remove the fixing lower roller upward.

Fixing lower roller

3 DIS./ASSEMBLY

Screw

Fixing knob

[7] Removing and Reinstalling the

Fixing Heat Roller Assembly

a. Procedure

(1) Remove the fixing unit from the main body.
(2) Remove the two springs and one screw (along

with the ground cable) from the thick paper
transport auxiliary plate.
Caution: The front and rear springs are different

in size and length. Install them
properly.

(3) Remove the two shoulder screws to detach the

thick paper transport auxiliary plate.

(4) Remove the two screws to detach the fixing plate.

Spring (short)

Spring (long)

Shoulder
screws

(4) Reinstall the above parts following the removal

steps in reverse.

Fixing

Thick paper
transport
auxiliary plate

Screw/ground wire

plate

Screws

(5) Remove the two springs and one screw to detach

the fixing heat roller assembly.

Screw

Spring

Spring

Fixing heat roller
assembly

3 - O - 4

FIXING UNIT

Caution: When installing the fixing heat roller

assembly, be sure to fit the guide pin
in the guide hole on the rear side.

(6) Reinstall the above parts following the removal

steps in reverse.

[8] Replacing the Heater Lamp (Heat

roller) (L4)

Caution: Do not touch the fixing heater

lamp (heat roller)(L4) with bare
hands.

Caution: Install the heater lamp (heat roller)

(L4) with the maker mark indication
side facing front.

a. Procedure

(1) Remove the fixing heat roller assembly.
(2) Cut the insulating cable tie to disconnect the

connector (CN462).
(3) Remove one screw to detach the lamp fixing

plate (rear).

Cable tie (for heat insulation)

3 DIS./ASSEMBLY

Connector

Screw

(4) Cut two insulating cable ties and remove the

screw securing the cable clamp to remove the

Faston terminal.
(5) Remove one screw to detach the lamp fixing

plate (front).

Lamp fixing plate (rear)

3 - O - 5

FIXING UNIT

(6) Remove the heater lamp (L4) from the front side.

Cable tie (for heat
insulation)

Faston terminal

Heater
lamp (L4)

Lamp fixing
plate (front)

(7) Reinstall the above parts following the removal

steps in reverse.

Caution: When reinstalling the lamp, pay

3 DIS./ASSEMBLY

attention to its orientation.

Cable clamp
(for heat
insulation)

Screws

[9] Removing and Reinstalling the

Fixing Heat Roller

Caution: Do not touch the fixing heater

lamp (lower)(L4) with bare
hands.

a. Procedure

(1) Remove the fixing heat roller assembly.
(2) Remove the heater lamp (lower) (L4).
(3) Remove the two C-rings and the front bearing to

remove the fixing heat roller.

(4) Remove two insulating sleeves from the fixing

heat roller.
Caution: Reinstall the front and rear insulating

sleeves with the collars facing toward
the fixing heat roller.

C-ring

Bearing

Collar

C-ring

Bearing

Insulating sleeve

Fixing heat
roller

Collar

Insulating sleeve

(5) Reinstall the above parts following the removal

steps in reverse.

3 - O - 6

FIXING UNIT

[10] Removing and Reinstalling the

Cleaning Roller

a. Procedure

(1) Open the fixing paper exit unit.
(2) Remove the two screws to detach the cleaning

roller assembly.

Screw

Cleaning roller
assembly

Fixing paper
exit unit

(3) Remove the two E-rings and two bearings to

detach the cleaning roller from the cleaning roller
assembly.

Screw

[11] Removing and Reinstalling the

Fixing Separation Claws (Lower)

a. Procedure

(1) Open the fixing paper exit unit.
(2) Remove the two screws to detach the fixing

separation claws (lower) assembly.

Screws

Fixing separation
claw
(lower) assembly

(3) Remove the spring supporting each fixing

separation claw (lower).
(4) Remove the fixing separation claws (lower).

3 DIS./ASSEMBLY

E-ring

Bearing

Cleaning roller

E-ring

(4) Reinstall the above parts following the removal

steps in reverse.

Fixing separation
claw (lower)

Spring/lower

(5) Reinstall the above parts following the removal

steps in reverse.

3 - O - 7

FIXING UNIT

[12] Removing and Reinstalling the

Fixing Separation Claws (Upper)

a. Procedure

(1) Open the fixing paper exit unit.
(2) Remove the six springs connected to the fixing

separation claws.

(3) Remove the six fixing separation claws.

Fixing
separation
claws
(upper)

Spring

3 DIS./ASSEMBLY

[13] Removing and Reinstalling the

Actuator for Fixing Exit PS (PS2)

a. Procedure

(1) Open the fixing paper exit unit.
(2) Disconnect the two connectors (CN464, 465)
(3) Remove one screw to detach the fixing separation

claw (lower) (on the drive side).

(4) Remove the two screws to detach the actuator/

sensor assembly.

Screws

Actuator/
sensor
assembly

Connectors
(CN465)

Connectors (CN464)

(4) Reinstall the above parts following the removal

steps in reverse.

(5) Remove the spring from the actuator/sensor

assembly to detach the actuator for fixing exit PS
(PS2).

Fixing paper exit
actuator

(6) Reinstall the above parts following the removal

steps in reverse.

3 - O - 8

FIXING UNIT

[14] Removing and Reinstalling Fixing

Temperature Sensors 1 and 2

Caution 1: After reinstalling fixing tempe-

rature sensor 2, make sure that the
sensor touches the fixing upper
roller.

Caution 2: Make sure the sensor wires do not

touch the fixing upper roller.

Caution 3: When reinstalling fixing tempe-

rature sensor 1, adjust its position
using the positioning jig and secure
it with screws. Be sure to apply
screw lock agent to the screws.

a. Removal procedure

(1) Open the fixing unit top cover.
(2) Remove the two screws to detach the fixing unit

top cover.

Fixing unit top cover (upper)

(5) Remove one screw (on the fixing plate side) to

detach fixing temperature sensor 2.

Fixing temperature
sensor 1 (CN466)

Fixing temperature
sensor 2 (CN467)

Screw

Fixing temperature
sensor 2

Fixing temperature
sensor 1

b. Reinstallation procedure

(1) Secure fixing temperature sensor 2 with a screw.
(2) Make sure that fixing temperature sensor 2

touches the fixing upper roller. If they do not

touch each other, be sure to bring the sensor in

touch with the roller.
(3) Set a fixing temperature sensor positioning jig

between fixing temperature sensor 1 and fixing

upper roller, and secure fixing temperature sensor

1 with two screws so that the distance between

the sensor and roller is equal to the thickness of

the jig.

3 DIS./ASSEMBLY

Screws

(3) Disconnect the two connectors (fixing temperature

sensor 1, CN466; fixing temperature sensor 2,
CN467) and release the sensor wires from the
cable guides.

(4) Remove the two screws to detach fixing

temperature sensor 1.

3 - O - 9

Fixing upper
roller

The fixing temperature
sensor 2 must contact
the fixing upper roller.

Screws

Positioning jig

Fixing temperature sensor 1

FIXING UNIT

(a) Set the distance "a" between the fixing

temperature sensor 1 and fixing upper roller so
that it is equal to the thickness of the positioning
jig.

Fixing upper roller

Fixing temperature
sensor 1

Standard value of a: 0.75 ± 0.1 mm

3 DIS./ASSEMBLY

(4) Apply screw lock agent to the two screws securing

fixing temperature sensor 1.

(5) Secure the wires of fusion temperature sensors 1

and 2 in the wire guides, and connect their
connectors.

(6) Reinstall other parts following the removal steps

in reverse.

a

[15] Removing and Reinstalling Fixing

Temperature Sensors 3 and 4

Caution 1: After reinstalling fixing tempe-

rature sensor 4, make sure that the
sensor touches the fixing heat
roller (upper).

Caution 2: Make sure the sensor wires do not

touch the fixing heat roller.

Caution 3: When reinstalling fixing tempera-

ture sensor 3, adjust its position
using the positioning jig and secure
it with screws. Be sure to apply
screw lock agent to the screws.

a. Removal procedure

(1) Remove the fixing heat roller assembly.
(2) Disconnect one connector (CN469), remove the

screw to detach the cable clamp, and cut insulating
ties.

(3) Remove one screw (on the fixing plate side) to

remove fixing temperature sensor 4.

Fixing
temperature
sensor 4

Fixing
temperature
sensor 4

Cable tie

3 - O - 10

Screw

Screw/wiring harness clamp

FIXING UNIT

(4) Disconnect one connector (CN468) and remove

four screws to detach two wire clamps.

(5) Remove the two screws to detach fixing

temperature sensor 3.

Fixing
temperature
sensor 3

Fixing temperature
sensor 3

Screws (2)

Screw/
wiring
harness
clamp

b. Reinstallation procedure

(1) Secure fixing temperature sensor 4 with a screw.
(2) Make sure that fixing temperature sensor 4

touches the fixing heat roller (upper). If they do

not touch each other, be sure to bring the sensor

in touch with the roller.
(3) Set a fixing temperature sensor positioning jig

between fixing temperature sensor 3 and fixing

heat roller, and secure fixing temperature sensor

3 with two screws so that the distance between

the sensor and roller is equal to the thickness of

the jig.

Fixing heat roller

Screws (two)

3 DIS./ASSEMBLY

Positioning jig

Fixing temperature
sensor 3

(a) Set the distance "a" between the fixing

temperature sensor 3 and fixing heat roller
so that it is equal to the thickness of the
positioning jig.

Fixing heat roller

a

Fixing temperature sensor 3

Standard value of a = 0.7 ± 0.1 mm

3 - O - 11