SHARP SP2289 Technical Report
COPIER : SF-2116 etc.
Date
:
Jun. 24, 1998
No. : SP-2289
ACTION TO ALLEVIATE PROBLEMS OF WASTE TONER FULL
DETECTION ERRORS (MAINTENANCE LAMP: FLASHING).
1.Model Name: SF-2116/0016/2118/1018/2020/1020/2120/1120
2.General: A change that was carried out as a permanent measure in the shape of the waste toner
bearing 2 was reported in Technical Report No. SP-2218, but a claim from a portion of
the market was received to the effect that the information presented in the report
concerning the problems of the process and the change history was unclear. To
accommodate these claims, a detailed report of the content is hereby reported.
<Description>
The maintenance lamp was flashing even though the inside of the waste toner bottle
(P/G No. [14]-21) was not full of toner.
<Cause>
The temperature of the waste toner bottle of the SF-2116 series rises to around 60°C
during continuous copy operations. Furthermore, pressure is normally applied to the
waste toner bottle by the waste toner spring (P/G No. [14]-25). When a temperature of
around 60°C is continued for a long period of time, the dimensions of the waste toner
bottle gradually become smaller due to the pressure applied to the waste toner bottle by
the waste toner spring, and the size of the waste toner bottle can decrease by as much
as 2 mm. With the decrease in size of the waste toner bottle, the ribs of the drive gear
87T (P/G No. [14]-24) come in contact with the ribs of the waste toner bearing 2 (P/G
No. [14]-23), causing a waste toner full detection to take place.
SHARP CORPORATION Reprography Division
1/4
Green
C
<Temporary Action 1>
As described in the figure shown below, the addition of a size correction sheet has been
carried out to the drive gear 87T in 4 locations.
Size correction sheet
Direction of revolution
Drive gear 87T
Attached to the left
side of the rib in four
locations, towards the
outer perimeter of the
gear.
Attachment standard for
the size correction sheets.
Gear 87T
<Part name> <Part code> <Quantity>
Size correction sheet PSHEG4473FCZZ 4
Action:
Japanese domestic production: From 1996 mid-October production.
Chinese (SOCC) production: From 1996 mid-October production.
French (SMF) production: From 1996 mid-October production.
<Temporary Action 2>
The size correction sheets (Qty: 4) which were attached in Temporary Action 1 described
above have all been discontinued, and the addition of washers has been carried out to
the drum frame unit as described in the figure shown below.
2/4
XWHSD30-10080
XWUSD30-04065
<Part name> <Part code> <Quantity>
M3 frat washer XWHSD30-10080 2
M3 rose washer XWUSD30-04065 1
∗ With the addition of the washers as described above, the same result has been
achieved as with Temporary Action 1. It is therefore not necessary to carry out
the addition of size correction sheets in machines in which the addition of the
washers described above has been carried out.
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