Toshiba G00I099 Service Note

BSINo. G00I099 Page 1

BSI No.: G00I099
Publish

2000/09/19

Date:
Subject: Countermeasure Method when Toner Scattering in the Market

(Temporary Method)

Model: DP4580, DP5570, DP6570, DP8070

Category Field Application UNIT

Request from the field To be applied when necessary Cleaner, Developer

FactoryApplication: -

CONTENT

When toner scattering/image soiling in the market occurs, be sure to carry out the following
procedure.

[Cause and Countermeasure]

In intermittent copying of a small number of sheets, there is a tendency for the toner density to
change highly and toner scattering /image soiling may be caused.

When toner scattering/image soiling happened, the following actions are required.

Course of Action Item

A Suppress a rise in toner concentration. ATC control

ATC: Auto-toner circuit)

B By creating a toner reservoir, even if toner scattering is

carried out, image soiling should not happen.

C The developer is in a degraded state at this time, and

the scattered toner has been deposited in the toner
filter, and the duct suction capability is reduced.

Note

Item C recommends that this be performed as part of a scheduled inspection (PM).

[Temporary countermeasure procedure]

1. Exchange of developer duct cover

Exchange of developer duct
cover
Exchange of cleaner stay
Exchange of developer material
Exchange of toner filter

(1) Developer material should be removed
from the developer unit
(2) Turn over the developer unit.
(3) The claws on the right and left shown in
figure A on the right are removed from the

developer unit. (see arrow
withdrawn towards the front (see arrow

(4) The new duct cover is attached using the
procedure opposite to that in (3). At this time,

be careful to how you turn the harness of
The projecting area of the duct should be slid
into the developer unit groove (arrow

), and the duct is

1

2

).

3

).

.

B

BSINo. G00I099 Page 2

2. Exchange of developer material
Add the new developer material to the developer unit in the predetermined method.

3. Exchange of cleaner stay
(1) Remove the drum.
Refer to the method below.
Service Handbook

Periodical Maintenance

2.

Periodic Inspection Check List

11. Drum

(2) Remove 3 screws. (See 3 arrows.)
(3) Remove the cleaner stay.
(4) Attach the new cleaner stay and fix the
3 screws.

4. Exchange of toner filter

Change the toner filter based on the following notes.

Service Handbook

Periodical Maintenance

2.