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: Feb. 6 2004

AR-M550/M620/M700  DETAILS OF EACH SECTION  6 - 109

1) Remove the fusing unit. (See “a. Fusing unit” in this section)

2) Release the pressure. (See “a-4. Heater lamp 1” in this section)

4) Remove the fusing roller (pressing) unit.

5) Remove the bearing from the fusing roller (pressing).

• Wind paper with the scraper tip without scratching the pressure

roller, and insert it.

• When inserting, be careful not to deform the scraper.

• Engage the bearings F/R with the pressure lever concaves and pull

out the paper from the scraper side.

• When closing the unit, first close the upper unit from the above in

order to prevent against deform of the scraper.

1) Remove the fusing unit. (See “a. Fusing unit” in this section)

2) Open the fusing unit.

3) Remove the pressure roller unit.

4) Remove the fusing cleaning scraper.

3) Remove the screw to open the fusing unit.

• When replacing the pressure roller or the scraper, they must be

replaced together. (This note should be observed within the mainte-
nance cycle.)

• When assembling the used pressure roller to the original position,

set it in the original direction (F-R direction). If it is set in the reverse
direction, it may not fit with the scraper, resulting in insufficient clean-
ing. If, however, the pressure roller and the scraper are replaced
together with new one, there is no need to consider this note.

NOTE: Avoid rattling of the pressure roller and the scraper. If not, the

scraper may be deformed and the pressure roller may be
damaged.

• When installing the pressure roller to the fusing unit, be careful not to

damage the cleaning blade.
If the cleaning plate would be deformed, copy dirt would be resulted.

: Feb. 6 2004

AR-M550/M620/M700  DETAILS OF EACH SECTION  6 - 110

• Clean and remove paper dust and toner remained in the concave of

the scraper holder.

1) Remove the fusing unit. (See “a. Fusing unit” in this section)

2) Release the pressure. (See “a-4. Heater lamp 1” in this section)

4) Clean the paper guide.

NOTE:

• When replacing the scraper, replace the whole scraper unit. In addi-

tion, when replacing the scraper, the pressure roller must be also
replaced. 

• Do not remove paper dust from the edge of the scraper. If paper dust

is forcibly removed, uneven contact occurs between the pressure
roller and the scraper, resulting in insufficient cleaning. 

1) Remove the fusing unit. (See “a. Fusing unit” in this section)

2) Open the fusing unit. (See “a-3. Heat roller” in this section)

3) Remove the pressure roller unit. (See “a-8. Pressure roller” in this

4) Remove the oil roller unit.

5) Remove the CL roller bearings from the oil roller.

NOTE: When installing the oil roller, set to that "R" mark and "

↑

" mark

are on the rear side of the unit.

NOTE: When handling the oil roller, be careful not to deform or dam-

age the rubber section. When cleaning the oil roller, do not rub
forcibly in order not to break the surface tube or the internal
rubber.

3) Remove the screw to open the fusing unit.

1) Remove the fusing unit. (See “a. Fusing unit” in this section)

2) Open the fusing unit. (See “a-3. Heat roller” in this section)

3) Remove the pressure roller unit. (See “a-8. Pressure roller” in this

4) Remove the paper guide.

NOTE:

• Tighten the screws in the sequence shown above.

• Do not allow clearance at the center of the paper guide.

• If copy dirt is heavy, replace it.

• Clean and remove paper dust from the cleaning roller plate and its

surrounding.

• Do not remove toner and paper dust from the mesh section of the

cleaning plate. If they are removed forcibly, the cleaning plate may
be deformed, resulting in insufficient cleaning.

5) Remove the cleaning roller plate.

• Be careful not to deform the cleaning plate. If the cleaning plate

would be deformed, insufficient cleaning would be resulted.

2

1

: Feb. 6 2004

AR-M550/M620/M700  DETAILS OF EACH SECTION  6 - 111

1) Remove the fusing unit. (See “a. Fusing unit” in this section)

2) Release the pressure. (See “a-4. Heater lamp 1” in this section)

3) Lay the unit on its side to prevent paper dust from dispersing, and

remove the lower cover.

4) Clean paper dust.

5) Remove the spring.

6) Remove the thermostat terminals.

7) Remove the thermistor.

8) Remove the sub heat roller unit.

9) Remove the lamp fixture.

10) Remove the sub heater lamp.

11) Remove the ring, and remove the second heater roller bearing and

the second heater roller.

NOTE: If the picture quality may be degraded damaged by the roller

damage, change the installing position to 

.

B

Marks

A

B

: Feb. 6 2004

AR-M550/M620/M700  DETAILS OF EACH SECTION  6 - 112

1) Remove the fusing unit. (See “a. Fusing unit” in this section)

2) Remove the thermostat 1 (A) and the thermostat 2 (B).

1) Remove the fusing unit. (See “a. Fusing unit” in this section)

2) Remove the heating unit.

3) Remove the thermostat 3.

1) Remove the fusing unit. (See “a. Fusing unit” in this section)

2) Lay the unit on its side to prevent paper dust from dispersing, and

remove the lower cover. (See “a-14. Sub heat roller” in this section)

3) Clean paper dust. (See “a-14. Sub heat roller” in this section)

4) Remove the second heating roller cleaning holding plate.

5) Do not lay the unit with the discharge brush on the lower side.

6) Remove the cleaning sheet.

• If the roller is cooled down, toner may be hardened to prevent

removing.

• Since cleaning is performed by applying a pressure by the

spring, be careful not to deform it.

• If copy dirt is heavy, replace the cleaning sheet with a new one.

When there is paper dust or foreign material on the heat sensitive sur-
face of the thermostat, clean and remove dust or foreign material.

NOTE: Be careful not to mistake the install position of the washer.

When there is paper dust or foreign material on the heat sensitive sur-
face of the thermostat, clean and remove dust or foreign material.

NOTE: Be careful not to mistake the install position of the washer.

NOTE: When there are paper dusts or foreign materials at the port

area (A), clean and remove.

A

B

(A)

NOTE: Clean and remove paper dust. (Be careful not to deform the

brush.)

Check that the harnesses on the hinge section (F frame side and R
frame side) which connects the upper and the lower frames are in the
normal state as shown below. 

• If the harness on the F side extends out from the frame, repair it cor-

rectly.

• Arrange wiring as shown above so that the harness slack on the rear

side does not extend to the gear side or dose not come too closely to
the gear.

Cleaning

OK

NG

OK

NG

F

R