Chapter3. Mechanismblocks; Generaldescription - Sharp FO-155 Service Manual

FO-155A
FO-355A
CHAPTER3. MECHANISMBLOCKS
[1] General description
1.
2.
1)
2)
3)
4)
3.
Document feed block and diagram
Paparfeed spring
I
Separation
Document
rubber plate
Pi@ roller (1)
Transfer roller (2)
\\
Transfer roller(l)
in* roller (2)
Fig.1
Document feed operation
The documentplacedin the hopperactuatesthe documentsen-
sor. After one second,the pulsemotor starts to drive the paper
feed roller.The documentis automatically taken up into the ma-
chine,andstoppedat the document s ensor.
When a specifiednumberof pulsesare receivedfrom the docu-
mentsensorafterthe document l eadedgeis sensed,scanning is
started.
Whena specifiednumberof pulsesare receivedfrom the docu-
mentsensorafter the document r ear edgeis sensed,scanningis
terminated andthe document i s fed through.
If
the document
sensoris active(i.e., anotherdocument i s in the
hopper),when the precedingdocumentscanningis completed
and it is fed out, the nextdocumentis takenup intothe machine.
If the documentsensoris not active(i.e., thereis no document i n
the hopper),whenthe document i s fed out, the operationis termi-
nated.
Hopper mechanism
3-1. General view
Fig.2
The hopperis used to align documentswith the documentguides
adjustedto the paperwidth.
NOTE: Adjust the document guides before and after inserting the
document.
3-2.
Automatic document feed
1) Useof the paper feed rollerand separationrubberplateensures
error-freetransportandseparation of documents. T he pIate
spring
presses the document to the paper
feed roller to assuresmooth
feedingof thedocument.
2) Document s eparation method:Separation rubberplate
Separation rubberplate
Paperfeedspring
//
'-b ;- + .— . —
Paper
feedroller /"
Fig.3
3-3.
D ocuments applicable for automatic feed
4x6series
Square
(788mm x 1091mm x meter s eries
1000mm sheets)
Minimum\ Maximum MinimumI Maximum
I Feeder caPaciN
I 20sheets, max.
I . .
1
Paperweight
45kg 64,3kg 52g/m2
74.3glm2
Paperthickness
(ref.)
0.06mm
0.09mm 0.06mm
0.09mm
Paper size
B6(128mm x 182mm) -
A4(210mm x 297mm), Letter ( 216mm x 279mm)
Feeder capacity
10sheets, max.
Paper weight 45kg 90kg 52g/m2
104g/m2
Paper thickness (ref.) 0.06mm 0.12mm 0.06mm 0.12mm
I
Paper size B6(128mm x 182mm) -
A4(210mm x 297mm), Letter ( 216mm x 279mm)
Paper quality I High quality paper o requivalent
I
NOTE: Double-side coateddocuments and documentson facsimile
recordingpapershouldbe insertedmanually.
T he document
feed quantity may be changed according to the document
thickness.
Documentscorresponding to a paper weight heavier than 64.3kg
(74.3g/m2) a nd lighterthan 135kg(157g/m2) a re acceptable for man-
ualfeed.
Documents heavierthan 135kgin termsof the paperweightmustbe
duplicated on a copierto makeit operativein the facsimile.
3-4.
L oading the documents
1)
Make
surethat the documents are of suitablesize andthickness,
andfree fromcreases, f olds,curls,wet glue,wet ink, clips,staples
andpins.
2) Placedocuments facedownin the hopper.
i) Adjustthedocument g uidesto the document s ize.
ii) Align the top edge of documentsand gently place them into
the hopper.The first pageunderthe stackwill be takenup by
the feedrollerto get readyfor transmission.
NOTES: 1) Curlededge of documents,if any, must be straighten
out.
2) Do not load the documentsof different sizes and/or
thicknesses together.
3-1