SHARP DTE118 Technical Report

Date: Feb. 21, 1994

DUPLICATOR: SD-2060

No. : DTE-118

TROUBLE SHOOTING F2 ERRORS DUE TO CARRIER BRUSH PROBLEM.

1.General: The contrast setting of the process control sensor unit sometimes lowers due to carrier

brush problem, and an F2 error occurs. To alleviate this problem parts in the DV unit have been changed.

2.Cause: Clots of developing fluid occur when the temperature at the rear side of the MX shaft rises. Vibrations or shocks cause these clots slip through the sealing mylar, where they then get caught on the doctor, causing carrier brush problem. Furthermore, if the sealing mylar is not attached properly, clots of developing fluid also occur when the MX shaft comes in contact with the mylar and heat is emitted, causing carrier brush problem.

3.Description: The total length of the MX bearing has been increased, the position of the V-ring has been changed, the sealing mylar (MX shaft A mylar 1, 2) has been discontinued and the shape of MX shaft A has been changed. These measures are designed to improve the flow of developing liquid and keep it from becoming stopped up, thus preventing carrier brush problem from occuring.

Old New

Box R side.

MX shaft A mylar 1, 2.

Changed bushing.

MX shaft A.

V-Rings.

MX shaft.

V-Rings.

SHARP CORPORATION Reprography Division

1/2

Green

Shape change of MX shaft A.

Old New

4.Action: (Factory action)

From 1993 December production.

(Field action)

When the trouble mentioned above occurs in machines already out on the field, or when clots of developing fluid are found when the developing fluid is changed, MX shaft A and the bearing should be changed. There is also the possiblity of v-ring deterioration, and the V-rings should therefore also be changed.

MX shaft A mylar 1, 2.

Changed to a ribbed design.

MX shaft A.

Changed MX shaft A.

V-Rings.

Ref.

Model

No.

SD-2060 All

1. Interc ha ng ea bl e. 4. N ot i nt er ch an ge ab l e.

2. Current type can be used in place of new type. New type cannot be used in place of current type.

3. Current type cannot be used in place of new type. New type can be used in place of current type.

Parts marked with “ ” is important for maintaining the safety of the set. Be sure to replace these parts with

specifi e d on es for mai n ta in i ng t he s a fe ty an d pe rf o rma nc e o f th e s et .

name

Version P/G No.

13 -20 NBRGC0377FCZZ Change in quantity AD Bearing

13 — NBRGC0521FCZZ AG MX bearing

13 PSHEP3528FCZZ Discontinued —

13 XRESP50-06000 Discontinued — E-Ring (E5) Q’ty: 2

13 -14 NSFTZ1857FCZ1 NSFTZ1857FCZ2 AV MX Shaft A Q’ty: 2

Current parts New parts

Parts code Parts code

PSHEP3529FCZZ Discontinued —

Price

rank

5. Interchangeable if replaced with same types of relate d parts in use .

6. Others.

Parts name

MX Shaft A mylar 1

MX Shaft A mylar 2

Effec-

tive

time

MidNov. 1993

Inter-

change-

ability

Note

Q’ty:

6 to 4

2/2