AR-505 (serv.man103). Original Jamming When Using RSPF. (WHITE) - Sharp Copying Equipment Technical Bulletin (repair manual)

AR505-1 (Technical Report)

Sharp Electronics (UK) Ltd., Technical Services Group

AR505

We have received a report from the field of the originals jamming when using the RSPF.
Please see below for details.

When a large number of originals are run continually from the RSPF, they may jam in the
delivery area.

Cause
When a large number of originals are run continually from the RSPF, static accumulates
on the upper guide plate (P/G No.65-21).  The static may leak onto other parts on rare
occasions.
If the static leaks, the driver IC in the transport motor will mis-operate causing the original
to jam in the delivery area.
Please note: this problem is not an epidemic failure but occurs only when a large number
of originals are run continually in machines that are installed in a low humidity
environment, in which static is easily generated.

Factory action
As a temporary measure, an earth wire is added to the upper guide plate to prevent static
accumulating on the upper guide plate.  Please see the diagram below.

The permanent measure will be announced at a later date.

TECHNICAL BULLETIN

Modification part

Upper guide plate

AR505-1 (Technical Report)

Sharp Electronics (UK) Ltd., Technical Services Group

Production cut-in
The temporary measure mentioned above has been implemented in production since
February 1999.

Please fit the part according to the following procedure when the problem occurs.

(1)  Open the jam cover in the RSPF.  Remove screw A.

(2)  Screw up the round-shaped terminal of the earth wire and the upper guide plate

together using the screw A removed in (1).

(3)  Loosen the screw B indicated in the above diagram and fix the U-shaped terminal of

the earth wire.

Current Parts

New Parts

Ref

No.

Model

name

Version

P/G No.

Parts code

Parts code

Price

rank

Parts name

Effec-

tive

time

Interc-

hange

-ability

Note

-

AR505

All

[65] -21

-

AR505RSPFWIRE

AB

RSPF wire

Feb

‘00

<Interchange>
1. Interchangeable.

4. Not interchangeable.

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

5. Interchangeable if replaced with same types of related parts in
used.

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

6. Others.

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

Jam cover

Upper guide plate

Modification part (earth wire)

Round-shaped terminal side

U-shaped terminal side

B

A