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Service Bul let in Ref. No. 2LV-0019 (D188)<Date> September 11, 2013

KYOCERA Document Solut ions Europe

Custom er Services & Support Divis ion (CSSD)

Subject Measures against the Horizontal Streaks at 105 mm from Paper

Trailing Edge

Model FS-4100DN, FS-4200DN, FS-4300DN, FS-2100D, FS-2100DN

KDC's Classification Entire Stock Rework In-Field modification at next visit

In-Field modification by case No modification necessary

Field Measure:Please replace the drum unit* when the phenomenon described below arises.*Since most drum unit replacements were caused by another problem, the old drum unit will be continuouslysupplied. Please order the new drum unit only if this phenomenon was recognized.

Serial Nos. of the Affected Machines:FS-4100DN (1102MT3SG0): L5Q3700104FS-4200DN (1102L13SG0): From next production (Not applied until 5T3300048)FS-4300DN (1102LV3SG0): L5W3700016FS-2100D (1102L23SG0): From next production (Not applied until L5J3201000)FS-2100DN (1102MS3SG0): L5M3702580

Others: From the available timing in the September 2013 production

TopicPaper might sag between the middle roller and registration roller during paper conveying and the sagging part is

released when paper trailing edge passes through the middle roller. Therefore, the paper trailing edge might flip

up and hit the bottom of the process unit. When some impact is applied at this time, the image formed between

the developer roller and drum might be distorted and horizontal streaks might appear at 105 mm from the paper

trailing edge. Therefore, the following change was made. (Note 1)

(Note 1) This phenomenon may be outstanding when printing graphic images.

(No problem is expected when printing texts.)

Content of Changes The sponge with Mylar sheet affixed at the bottom of the process unit where the paper trailing edge hits was

thickened by 3 mm in order to narrow the paper conveying path. Accordingly, paper trailing edge vertically

sagging when it passes through the middle roller nip is now regulated and the impact at that time will be

decreased.

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<Sample of horizontal streaks>

*Please refer to the next page for the occurrence mechanism.

No.Old Part

No.New Part

No.Description

Qty.Com

bipati-lity Remarks

Old New Old New

1302LV93041

2LV93041302LV930422LV93042

DK-3130(E) 1 1 X O *1 (KDE, KDID)

2302LV93051

2LV93051302LV930522LV93052

DK-3130(J) 1 1 X O *1 (Olivetti)

3302MS930212MS93021

302MS930222MS93022

DK-3100(E) 1 1 X O *2 (KDE, KDID)

4302MS930312MS93031

302MS930322MS93032

DK-3100(J) 1 1 X O *2 (Olivetti)

*1: FS-4100DN, FS-4200DN, FS-4300DN*2: FS-2100D, FS-2100DN

Papertrailing edge

105 mm

Paper feedingdirection

Horizontal streaks

<Bottom of the process unit (paperconveying side)>

Mylar sheet with sponge

(Not individually supplied)

: Change of the sponge thickness

(Old) 5.0 mm

(New) 8.0 mm

Sponge

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[Cross section of the image process section] (Viewed from the machine front side)

Image process unit (including developer, drum and cleaning unit)

Middle roller

Registration rollers

Developer rollerDrum

Sponge with Mylar sheet

Paper conveying path

Paper trailing

edge waves

[Occurrence mechanism of the horizontal streaks]

1) Paper sags between the middle roller and the registration

roller due to the surface speed difference among the

rollers around the image process section.

2) When paper trailing edge passes through the middle

roller nip, the sagging part is released and the paper

trailing edge flaps vertically.

3) When the paper trailing edge hits the Mylar sheet with

sponge at the image process section due to flapping in

2), the image formed between the developer roller and

drum (at 105 mm from the paper trailing edge) is

distorted and the horizontal streaks appear.