Toshiba G00J129 Service Note

BSINo. G00J129 Page 1

BSI No.: G00J129 Publish

2000/11/06

Date: Subject: ROM Improvement (300M: 09->10, 302M: 03->04, 304M: 01->02)

Model: DP4580, DP5570, DP6570, DP8070

Category Field Application UNIT

Addition of the Function, To

improve the reliability

FactoryApplication: From Oct. at the factory

Others Software

CONTENT

The ROM has been changed as follows.

[Changed/Added Part No.]

MODEL P-I Before Change After Change Note P I R

PM-551 PM-651

DP5570 DP6570 DP4580 62-33 4407893050

PM-801 DP8070

P-I: Page-Item P: Contents of Change I: Interchangeability R: Reasons for Change

[Changed Contents]

62-33 4406383180

PRA-300M-09

PRA-302M-03

62-33 4408856080

PRA-304M-01

Countermeasure to soiling of back of the copy (TABS indication) When toner is forcibly added mode during printing, the rotation of the fuser unit has been changed to stop or become low.

(Reason for change) Especially in copiers which make a lot of duplex copies or prints (70% or greater), the cleaning roller ( P .32-I.37 4409893740 B-8070L ) becomes more soiled than usual. So, after to been added, soiling at the back of the copy occurs very rare. Abnormal heating of the cleaning roller (P.32-I.37 4409893740 B-8070L) causes the fuser to run idly at the time of toner supply. A control to prevent such idling has been added.

4406383270 PRA-300M-10

4406383290 PRA-302M-04 4406383280 PRA-304M-02

C B D -

FAA

8-figure counter (TEG request)

Each of the following counters have been changed from 6 figures to 8 figures.

Code

251 PM counter, setting value 252 PM counter, current value 351 Electronic counter

Setting Item

BSINo. G00J129 Page 2

*353 Short size counter *354 Long size counter

358 Manual bypass feed counter 359 LCF counter 360 Upper cassette counter 370 Middle cassette counter 371 Lower cassette counter 372 ADU counter 374 DF counter 375 Copy job counter 376 Print job counter 401 Drum counter 404 Developer counter

PS)

The codes "353" and "354" were not included in the Service Handbook; their details are given in this BSI.

Setting Mode (08)

Code

Setting Item Mode Image

mode

Default Allowable Remarks Operation

procedure

group

353 Short size counter ALL 0 0 ~

99999999

354 Long size counter ALL 0 0 ~

99999999

1 1

Countermeasure to toner scattering

As a [Countermeasure when Toner Scattering occurs in the Market (Temporary Measure) ] , an ATS control (single item) (lowered by 10 bits) has been inserted in the ROM. For the

cause and complete countermeasure, see

BSI #.G00I099

Together with this change, the control for the "developer material life control switching

(08-414)" is added.

0 --- ATS control is listed in

BSI #.G00I099

(The ROM has a supplementary value 10 bits lower than before the change.) 1~3 --- See below 4 --- Correction control of ROM before change

Current ROM PRA-300M-09

PRA-302M-03 PRA-304M-01

PS)

Usually select "0". Even if "0" is selected, it can be found that toner scattering does not stop in special cases such as repeat printing of small quantities. In this instance, select 1, 2, 3 in steps. Select "2" in the following case. When "0" is selected and toner scattering soils the image

after 200,000 to 300,000 copies. "1" is an intermediate stage between "0" and "2", whereas "3" is above this. However in low humidity conditions, "2" and "3" can reduce the image density. When the new ROM is applied; If toner scattering occurs on the market, as a

countermeasure manually return the machines which have had 10 bits reduced to their previous status by the following method.

(Adjustment Method)

Write the value of 08/404.1. With the UP key in 05/200, raise the current control bit value by 10 bits.2.

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