Kyocera TASKalfa 250, TASKalfa 552ci, TASKalfa300, TASKalfa400, TASKalfa500ci SERVICEBULLETINS 2H7 050

Service Bulletin

SB Number:

Subject:

SB 2H7-050

BK toner smudge on the print-out

Creation Date: 21/04/2011

Model: TASKalfa250ci/300ci/400ci/500ci/552ci

Phenomenon Depending on the operating environment (*) the cohesive materials of the deteriorated toner

and the additives may disengage from the toner. These particles may accumulate at the top side of the BK developer magnet cover and may interrupt the air ow of the developer

cooling fan. Under this condition the deteriorated toner may adhere to the magnet/sleeve roller. In this case the BK toner smudge may appear on the print-out.

Notes (*) It is more likely that the BK toner smudge may appear in case the temperature on the inside of

the machine increases, when the machine operates for a long time or when printing low

coverage print-outs continuously in monochrome mode.

Solution Therefore the below mentioned changes have been made.

Content of changes

Item Contents

1 Preventing toner accumulation on the

magnet cover.

2 Preventing toner scatter in the developer

unit.

3 Preventing toner scattter on the outside

of the developer unit.

4 Recognizing the latest type of the BK

developer unit.

5 The reverse drive rotation has been

added.

The magnet cover has been changed in shape to collect the additives and the deteriorated toner.

1. The magnet has been added to attract the toner.

2. The metal plate has been added.

3. The internal pressure at the front/rear side edge of the Developer unit has been reduced.

1. The sponge has been added to the Developer unit on the side facing the Drum unit.

2. The sponge(L), sponge (S), seal and the leaet containing the

afxing procedure of the sponges have been bundled.

1. The upper/lower edges of the barcode label have been changed

to green to recognize the latest BK developer unit.

2. The name of the latest BK developer unit has been added to the packing material to recognize the latest BK developer unit.

The reverse rotation has been added to loosen the particles

(Vibration) when they accumulate on the metal plate.

1. Firmware upgrade:

The function has been added to reverse the drive of the developer

unit for 0.5 seconds. Initial setting: Reverse rotation is executed every

2 minutes (BK developer drive time). The “Interval Time” has been added to maintenance mode U147.

(Setting value: 0~3, initial value: 2)

We recomend not to set the interval to “0“.

2. The developer drive gear has been changed.

KMIS Service Department, Kyocera Mita Europe B010-B016 / SB 2H7-050

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Service Bulletin

Serial numbers of affected machines

Type Serial number

TASKalfa250ci/400ci/500ci Not available

TASKalfa300ci QJE1107042

TASKalfa552ci QXG1100256

The above mentioned changes have been applied to machines produced after the above mentioned serial numbers.

Parts

No. Old Parts

No.

1 ------------ 302H793710

2 ------------ 302JZ93410

3 ------------ 302KY93180

4 ------------ 302H794830

Classication

Field measure When the above mentioned phenomenon occurs, please take the following measures:

New Parts No.

2H793710

2JZ93410

2KY93180

2H794830

Entire stock rework

1. Upgrade the rmware to the latest version. (Firmware pack 5).

2. Please replace the BK developer unit with the latest type.

3. Afx the 2 sponges and the seal to the Drum unit. The sponges and the seal have been bundled with the latest BK developer unit.

Notes: Please order the seal kit (Parts seal front drum set sp) for the TASKalfa552ci and afx the sponges and the seal to the Drum unit, when the latest type of the BK developer unit is installed in the machine. Align the 2 sponges and the seal according to the bundled leaet.

Description Q’TY Interchange-

ability

Old New Old New

PARTS DLP K UNIT B (DV-855B)

PARTS DLP K UNIT B (DV-865B)

PARTS DLP K UNIT B (DV-856B)

PARTS SEAL FRONT DRUM SET SP

In-eld modication at next visit

- 1 - O TASKalfa500ci/

- 1 - O TASKalfa300ci/

- 1 - O TASKalfa552ci

In-eld modication by case

Applicable model(s)

400ci

250ci

No modication necessary

Sample of the BK toner smudge

Paper feed direction

KMIS Service Department, Kyocera Mita Europe B010-B016 / SB 2H7-050

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Service Bulletin

Old condition of the BK developer unit: Cross section of the magnet roller/sleeve roller section, viewed from the

front side of the machine.

Sleeve roller

Magnet roller

Metal plate

Magnet cover

Cohesive materials of the additives and the deteriorated toner

Under normal conditions the air ow from the developer cooling fan will remove the additives and the deteriorated toner, which accumulate on the magnet cover by passing through the cut-out of the magnet cover. The remaining

particles may be condensed, depending on the operating condition. In this case these particles may obstruct the air ow from the developer cooling fan above the magnet cover. Under this condition the BK toner smudge may ap- pear on the print-out.

New condition of the BK developer unit: Toner smudge prevention.

Sleeve roller

Additives and the deteriorated toner

=Air ow of the developer cooling fan.

Magnet roller

(*)

Magnet

Latest magnet cover

Notes (*): The air ow from the developer cooling fan does not pass through the Developer unit, due to the latest type of the magnet cover.

KMIS Service Department, Kyocera Mita Europe B010-B016 / SB 2H7-050

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