SHARP SP1793 Technical Report

Date: Sep. 8, 1994

COPIER : Z-55

1. TO DEAL WITH DETACHMENT OF WASTE TONER BOX SHUTTER
AND BREAKAGE OF PINS

2. PREVENTION OF SCRATCH TO DRUM DUE TO DEVELOPER
STICKING ON DEVELOPER CARTRIDGE R SHEET

No. : SP-1793

1. To deal with detachment of waste toner box shutter and breakage of pins

1.Model name: Z-40, 50, 52, 53, 55, 57, 57II, 70, 72, 76, 77, 85, 85II, 88, 52II (All of Z series except for
Z-20 series, Z-29 and 30.), SF-6000, 6100, 2010

2.General: On rare occasion, the developer toner cartridge was inserted to the main unit under the
condition of ceasing the waste toner shutter such as pressing it by your fingers. This
brought the breakage of the cam’s pins for shutters. Waste toner could not be exposed
from the dram unit to the waste toner box. The dram unit might be locked when you
used it for a long time under this condition. Therefore we have made changes to
improve it. On rare occasion, the waste toner shutter was detached from the claw of the
waste toner box. We also have made changes to improve it.

3.Description: We have added ribs to open the waste toner shutter although pins for its cams were
broken. We also have made the claw’s height higher not to detach the waste toner
shutter.

Waste toner box front side

1 1.5

Addition
of ribs

Claw's height

Waste toner shutter
upper side

Change from 1mm to 1.5mm

4.Action: From mid-March 1994 production

SHARP CORPORATION Reprography Division

1/3

Green

C

2. Prevention of scratch to drum due to developer sticking on developer cartridge R
sheet

1.Model name: Z-40, 50, 52, 53, 55, 57, 57II, 70, 72, 76, 77, 85, 85II, 88, 52II (All of Z series except for
Z-20 series, Z-60 series, Z-29 and Z-30) SF-6000, 6100, 2010

2.General: Developer sometimes stuck on the DVCAR sheet in the rear side developer cartridge
when you removed it from the main unit. In case of the developer cartridge was inserted
again to the main unit under this condition, the circumference of the drum rear side was
scratched. We made necessary changes to improve it.

3.Description: We have changed widths of the developer cartridge R sheet from 14.5mm to 9.5mm.
The placing standards has been also changed as follows.

14.5mm →9.5mm

0.5 ±0.5

DVCAR sheet

Dimension E

DVCAR mylar

Standard CDimension D

1

4.Action: From mid-March 1994 production

Please refer to the serial number attached to the developer cartridge to identify the
effecti ve time.

*

Indication of the production year

Attach the DVCAR sheet on the DVCAR mylar
as shown in left after the mylar is placed.
Fit it to the standard C.

1)
Be sure not to let it over from the dimension

2)
D and the dimension E.

Indication of the production monthSerial number

2/3

The serial number for the Chinese production has nine figures. The end figure indicates
the production month and the ninth figure indicates the production year.