Aficio AF-350, Doc feeder question.

[Hansoon]

Aficio AF-350, Doc feeder question.

Gives often jams, documents are just stalling. Replaced all takeup/sep rollers, and take up belt as well as one way clutches. Doc feed belt is not yet replaced.

I noticed that the drive motor turns as it should be but it seems that the doc feed belt stalls but could not figure out why. Are there any one way clutches in the drive train motor > doc feed belt I might have overlooked? I never had a doc feed belt slipping in other copiers I have serviced but could that be the reason here according to your experience with those Ricoh's? Don't want to invest in the wrong part and I'm unsure cause Ricoh is not exactly my main brand.

Hans

[E Winter]

There is also a one way mechanism inside that white thingy where you slide in the feed beld/pick up roller shaft assy. The feed beld holder has been changed, see this MB:

Model: NAD 30S/30/40 DF(DF67) Date: 28-Mar-01 No.: MA680008
Modified Article: Holder - Belt Drive Roller Prepared by: E. Fukuyama
From: Technical Services Dept., GTS Division
Reason for
Modification:
Parts catalog correction
To facilitate assembly
Part standardization
Vendor change
To improve reliability
Other
To meet standards
( )
To prevent multi-sheet feeding, the contact surface area between the feed belt and
separation roller has been reduced by changing the shape of the belt drive roller
holder and the pick-up lever.
Not e: The new holder and pick-up lever must be installed together as a set. This is
because if the new holder (A6801822) is used with the old lever (A6801871), the
decreased friction between the roller and paper may cause misfeeds.
Old part
number
New part
number
Description Q'ty Int Page Index
A6801821 A6801822 Holder – Belt Drive Roller 1-1 X/O 7 28
A6801871 A6801872 Pick-up Lever 1-1 X/O 7 18
RCL (Japan) Production
MODEL NAME V/Hz DESTINATION CODE SERIAL NUMBER
DF67 115/60 All (SAVIN) A680-15 1B31820125
DF67 115/60, 220/50 All (Infotec) A680-26 3Q78310001
DF67 115/60, 220/50 All (Ricoh) A680-57 A7711820001
DF67 115/60, 220/50 All (NRG) A680-62 AS01820001

[Hansoon]

Danke Jan, yes we made that mod. Its not that much double feeding. The problem is that the originals are not being transported on/off the glass platen. I had the feeling that the doc feed belt wasn't driven all the time or perhaps dragging occasionally.

Tschüß

Hans

[E Winter]

"doc feed beld"

Do you talk about the big white transport belt (die Matte) or the little gred feed belt (das Einzugsband, was nach der Vorschubrolle kommt)?

I never had any trouble with the transport belt - 99% of the trouble I had with this DF occured at the feed/separation process.

And I'm not mad about the fact that we only have 1-2 machines of this type left in the field

[Hansoon]

Ja, die Matte scheint nicht, oder teilweise, mitgenommen zu werden. Muß am Montag noch mal gucken.

Schöne Sonntag und Danke

Hans

[E Winter]

Ahh - da fällt mir doch noch was ein - guck dir mal die Andruckrollen unter der Matte an, die sind aus Schaumstoff und nicht sehr alterungsbeständig.

=

check the foam rollers behind the transport belt

[paulg]

Foam rollers under the belt can wear out and stop driving the belt, and im sure you have poliched the glass? As its amazing what even cheap furtinure polish will do when the glass loses its slide.

[TonerMunkeh]

There is a mod for a couple of the gears in the DF drive assembly too, I had install it on a NAD about a year ago and it cleared up all sorts of wierd jamming issues.