Toshiba f98l460 Service Note

BSI(Service Note) TOSHIBA

TOSHIBA TEC CORPORATION

2-4-1, Shibakoen, Minato-ku, TOKYO, 105-8524 JAPAN

BSI No

F98L460

SUBJECT

Resetting of Exposure due to Upgrade of Drum Sensitivity (OD-1710)

MODEL

CATEGORY

Countermeasure to field
trouble, Treatment in the field

From Nov. 1998 Lot No
U8Y1****)

CONTENT

To prevent the possibility of "background/black streaks" occurring under high-temperature conditions
in some area, the drum (OD-1710) material has been changed and the drum sensitivity has been
altered.

1650, 1710, 2050, 2310, 2500, 2540

FIELD APPLICATION

To be applied when necessary

FACTORY APPLICATION

Date

98/12/17

UNIT

Supply, Drum related

DTM-F8Z03

With the upgrading of the drum sensitivity, the exposure setting value (bit value) differs from the
current drum one. When this drum is exchanged, reset the exposure as shown below.
There is no change for the drum (OD-1710) parts code. Based on the above application lot number,
one can distinguish the type of sensitivity.

[Resetting Exposure]
When exchanging the drum (sensitivity upgrade), reset the manual exposure and the automatic
exposure.

(1) Manual exposure

In the adjustment (05) mode, the bit value of the manual exposure should be down by about forty
bits compared with the value which is set in the current drum.

(2) Automatic exposure

Basically, when the manual exposure is set, the automatic exposure center value will also slip,
accordingly but be sure to reset it, as necessary in the adjustment (05) mode.