MAINTENANCE 28.2 Photo Conductor Section

28. MAINTENANCE PROCEDURETheory of Operation Ver.3.0 Oct. 2009

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28.2 Photo conductor section

28.2.1 Removing/reinstalling the photo conductor section

NOTE

• When the drum section has been removed, be sure to store it in a dark place with the drum cover

provided.

• When removing/reinstalling the photo conductor section, be careful not to rotate the drum in any

direction other than the specified direction. Rotating it in the opposite direction to the rotational

direction while printing damages the cleaning blade.

• When removing the photo conductor section, be sure to clean the coupling.

• When removing/reinstalling the photo conductor section, be sure not to touch the drum claw.

• When replacing the photo conductor, be sure to replace the cleaning blade at the same time.

A. Procedure

1. Open the front doors /Rt and /Lt. 2. Tilt the lever that pulls out the duplex section.

(Refer to P.249) 3. Loosen 2 screws [1] and remove the photo con-

ductor section cover [2].

4. Release the lock lever /1 [1] and pull out the inter-mediate toner hopper [2].

[2]

[1]

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[2]

[1]

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28. MAINTENANCE PROCEDURE

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Theory of Operation Ver.3.0 Oct. 2009bi

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5. Release the lock lever /2 [1] and open the inter-mediate toner hopper [2].

6. Disconnect 2 connectors [1]. 7. Turn the drum lock knob [2] clockwise [3] to rotate

the drum 1 full turn, and turn the knob counter-clockwise [4] to remove it.

Note

• When removing the drum lock knob, be sure

to rotate the drum 1 fill turn clockwise to put

the toner on the drum into the cleaner for dirt

prevention.

8. Pull out the coupling [1].

Note

• When reinstalling the coupling, be sure to

clean the periphery of the coupling with the

isopropyl alcohol.

9. Release the photo conductor section lock lever /1 [2] and /2 [3] and pull out the photo conductorsection [4] by holding the lock levers /1 and /2.

10. Reinstall the above-mentioned parts following theremoval steps in reverse.

[2] [1]

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[1] [3]

[2]

[4]

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[2] [3]

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28.2.2 Replacing the charger unit

NOTE

• When removing the charger unit, be careful not to touch the mesh portion of the charger control

plate with bear hands.

• When cleaning the charger control plate, blow off dirt with the blower brush.

A. Periodically replaced parts/cycle

• Charger unit: Every 6,000,000 prints

B. Procedure

1. Pull out the photo conductor section from themain body. (Refer to P.149)

2. Disconnect 2 connectors [1]. 3. Hold the portions marked with [2] and [3] and

remove the charger unit [4]. 4. Reinstall the above-mentioned parts following the

removal steps in reverse. 5. After replacing the charger unit, conduct the fol-

lowing item.

- Counter reset of the parts counter No.52.

[3]

[2]

[4]

[1]

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151


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28.2.3 Replacing the charger control plate


• Charger control plate: Every 750,000 prints

B. Procedure

1. Remove the charger unit. (Refer to P.151) 2. Slide the lever [1] in the arrow-marked direction [2]

to release the lock [3] and remove the chargercontrol plate [4].

Note

• Be sure to avoid loosening or removing the

screw [5] that fastens the lever.

3. Install the parts by reversing the removal steps.

Note

• When reinstalling the charger control plate,

make sure that the charger control plate is

not bent and the edge is not distended.

4. After replacing the charger control plate, conductthe following steps.


[2]

[4]

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[4]

[1]

[5]

[3]

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28.2.4 Replacing the charger wire/charger vibration proof rubber


• Charger wire : Every 750,000 prints

• Charger vibration proof rubber: Every 750,000 prints

B. Procedure

1. Remove the charger unit. (Refer to P.151) 2. Remove the charger control plate. (Refer to P.152) 3. Remove the claws, 2 each, and remove the spark

arrester plates /Fr [1] and /Rr [2]. 4. Remove the springs [3], 1 each, and then remove

the charger wires [4] and the charger vibrationproof rubber [5], 1 each.

Note

• When removing the charger wire, be careful

not to drop off the charger vibration proof

rubbers.

• When reinstalling the charger wire, be sure to

insert each of the wires into the cut [6] of the

charger vibration proof rubber.

• Be sure to reinstall the charger wires so that

the hook [7] of each spring turns to the inside.


6. After replacing the charger wire/charge vibrationproof rubber, conduct the following steps.


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[1][3][4] [7]

[4] [3] [7]

[2] [5]

[5][6][4]

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28.2.5 Replacing the charger cleaning unit/C-clip


• Charging cleaning unit : Every 750,000 prints

• C-clip : Every 750,000 prints

B. Procedure

1. Remove the charger unit. (Refer to P.151) 2. Remove the charger control plate. (Refer to P.152) 3. Remove the charger wire. (Refer to P.153) 4. Remove 3 screws [1] and remove the charger

duct [2].

[2]

[1]

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5. Remove the C-clip [3], 1 each, from the shaft [2]of the charger cleaning unit [1].

6. Reverse the charger unit [4] and remove the 2charger cleaning units.

7. Remove the collar [5] from the shaft of each of thecharger cleaning units.

8. When the charger back plate [6] is stained, cleanit with the isopropyl alcohol and the cleaning pad.

Note

• Be careful that the collar inserted into the

shaft of the charger cleaning unit does not

drop off.

• Be sure to reinstall the charger cleaning unit

so that the marking "F" [7] turns in the same

direction as shown in the drawing.


10. After replacing the charger cleaning unit/C-clip,conduct the following steps.


[5]

[4]

[3]

[6] [7] [4][2]

[1]

[2]

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28.2.6 Cleaning the LPH lens

A. Periodically cleaned parts/cycle

• LPH lens : Every 750,000 prints

B. Procedure

1. Pull out the photo conductor section from themain body. (Refer to P.149)

2. Remove the wiring harness [1] from the wiringharness guide [2].

3. Hold the section A [1] and B [2] with both handsand release the section /Fr [3], and then releasethe section /Rr [4] to remove the LPH unit [5].

Note

• When removing/reinstalling the LPH, be sure

to remove the label 1 [6] side at first and then

the label 2 [7] side.

[1][2]

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2

1

[2] [7]

[5] [4][3]

[1][6]

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Note

• When reinstalling the LPH unit [1], be sure to

set each guide pin [2] and [3] to each guide

hole [4] and [5] of the unit.

• When reinstalling the LPH unit [1], install the

section /Fr [6] before installing the section /Rr

[7].

[6] [4]

[3]

[7][1]

[6] [5] [7]

[2]

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4. Clean the lens section [1] of the LPH unit with acotton swab soaked in alcohol, and wipe with adry cotton swab to finish.

Note

• Insert a cotton swab to the inside of the

depression of the lens cover [2] to contact

with the lens section [3].

• Be sure to use a cotton swab for one way [4]

only once for both of cleaning and finishing.

Never use a cotton swab back and forth. Be

sure to use a new cotton swab to clean it

again in the same direction or clean it in the

opposite direction.


[4] [1]

[3] [2]

[2]

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28.2.7 Replacing the drum temperature sensor


• Drum temperature sensor: Every 3,000,000 prints

B. Procedure

1. Pull out the photo conductor section. (Refer toP.149)

2. Remove the LPH unit. (Refer to P.156) 3. Disconnect the connector [1]. 4. Open the sensor support stay [2]. 5. Remove the screw [3] and remove the drum tem-

perature sensor [4]. 6. Reinstall the above-mentioned parts following the

removal steps in reverse. 7. After replacing the drum temperature sensor, con-

duct the following steps.


[1] a0g6t3c023ca

[2]

[3]

[4]

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28.2.8 Replacing the drum/cleaning of the photo conductor section

NOTE

• Be careful not to touch or damage the drum and the cleaning blade with bare hands.

• When storing the drum, be sure to store it in dark place with the drum cover attached.

• When reinstalling the drum, the cleaning blade and the toner guide brush, be sure to apply setting

powder all around the drum and the cleaning blade regardless of these parts being new or used

ones.

• When the drum is applied with setting powder, be sure conduct the following operations before

installing the photo conductor section to the main body:

1) With the charger, the LPH unit and the developing section removed, rotate the drum 1 full turn

(to prevent splashing of setting powder to the charger and prevent the image from getting

blurred).

2) When installing a new drum, be sure to reset the photo conductor counter in the service mode.

Otherwise, image gray background and toner scatter occur. (Refer to Field Service P.244)


• Drum: 1,000,000 prints or the specified period of drive time (PRO 1200/1200P: 180 hours drive, PRO 1051:220 hours drive), whichever is earlier

B. Procedure


2. Remove the charger unit. (Refer to P.151) 3. Remove the LPH unit. (Refer to P.156) 4. Remove the developing unit. (Refer to P.171) 5. Remove the cleaning section. (Refer to P.196) 6. Open the sensor support stay. (Refer to P.159) 7. Remove the drum [1].

[1]

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8. Clean toner adhered around the drum installationsection [1] and the developing suction ducts [2]and [3] with a vacuum cleaner.

9. Clean the JAM sensor [5] on the JAM sensorboard (JAMB) [4] with the cleaning pad.

10. Clean the IDC sensor [7] on the toner controlboard (TCB) [6] with a cotton swab soaked inalcohol.

Note

• Do not use any materials other than a cotton

swab soaked in alcohol to clean the IDC sen-

sor. When cleaning the IDC sensor in other

ways, the IDC sensor performance is not war-

ranty. Be sure to replace TCB.


12. After replacing the drum/cleaning the photo con-ductor section, conduct the following steps.

- Counter reset of photo conductor in themaintenance counter (Refer to Field Service P.244)

- Auto charging potential adjustment (Refer to Field Service P.236)

- Photo conductor setting mode (Refer to Field Service P.238)

- Auto maximum density adjustment (Refer to Field Service P.239)

- Auto dot diameter adjustment (Refer to Field Service P.240)

- Cartridge set mode (Refer to Field Service P.241)

[6] [7]

[1]

[5] [4]

[2] [3]

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28.2.9 Replacing the drum claw

NOTE

• When reinstalling the drum claw, take note of the direction and position of the claw.


• Drum claw: Every 1,000,000 prints

B. Procedure


2. Remove the drum. (Refer to P.160) 3. Remove the spring [1].4. Remove 2 screws [2] and the drum claw unit [3].5. Disconnect the connector [4].

[3] [4]

[1] [3][2]

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Note

• When reinstalling the drum claw unit [1], be

sure to set the hooks [2] to the shafts [4] of

the photo conductor section [3].

[4][4]

[1]

[2] [2]

[3]

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12

28. MAINTENANCE PROCEDURE Theory of Operation Ver.3.0 Oct. 2009bi

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6. Remove 4 C-clips [1], and pull out 2 shafts [2] inthe arrow-marked direction to remove the 3 drumclaws [3].

7. Remove the springs [4], 1 each, from each of thedrum claws.

Note

• When reinstalling the drum claws, be sure to

clean the shaft with the isopropyl alcohol and

a cleaning pad. Reinstalling the separation

claws with toner adhered causes the opera-

tion to slow down.

• After reinstalling the drum claws, check to

see if they move smoothly.


9. After replacing the drum claw, conduct the follow-ing item.


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[2]

[1][4][3][2]

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28.2.10 Replacing the drum fixing spring and the drum positioning collar


• Drum fixing spring : Every 1,000,000 prints • Drum positioning collar : Every 1,000,000 prints

NOTE

• Replace the drum fixing spring and the drum positioning collar at the same time.

B. Procedure


2. Remove the drum positioning collar [2] from thedrum shaft [1] and then remove the drum fixingspring [3].

Note

• When replacing the drum positioning collar

and the drum fixing spring, be sure not to put

weight on the photo conductor section [4],

the guide rails [5] and the drum shaft.

• When reinstalling the drum positioning collar,

be sure to set it to the slit [6] of the drum

shaft.

3. Reinstall the above parts following the removalsteps in reverse.

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[1]

[6]

[3]

[2]

[5] [4]

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MAINTENANCE 28.2 Photo Conductor Section

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