Chapter 3. Mechanism Blocks; General Description - Sharp FO-1470 Service Manual

CHAPTER 3. MECHANISM BLOCKS

[1] General description

1. Document feed block and diagram
Separation
Original
rubber
sensor
Separate
Pinch roller
spring plate
Separate
spring
Feed roller 2
Pinch roller
Pinch roller2
Pinch roller spring 2
2. Document feed operation
1) The original, which is set in the document hopper, feeds automati-
cally when the front sensor is activated. This in turn activates the
pulse motor which drives the document supply roller. The document
stops when the lead edge is detected by the document sensor.
2) The lead edge of the original is fed a specified number of pulses after
the lead edge of the document is detected for the reading process to
begin.
3) The trailing edge of the original is fed a specific number of pulses
after the trailing edge of the document deactivates the original sen-
sor. The read process then stops and the original is discharged.
4) When the front sensor is in the OFF state (any document is not set
up in the hopper guide), the drive will be stopped when the docu-
ment is discharged.
3. Hopper mechanism
3-1. General view
The hopper section contains document guides that are used to adjust
the hopper to the width of the original document. This ensures that the
original feeds straight into the fax machine for scanning.
Document width: 148 mm to 216 mm (A5 longitudinal size to Letter
longitudinal size)
NOTE: Adjust the document guide after setting up the document.
Document
guide upper
Front
sensor
Hopper guide
Paper feed
spring
Paper feed arm Document guide
lower
Paper feed roller
Feed roller
Fig. 1
Fig. 2
3-2. Automatic document feed
1) Use of the paper feed roller and separation rubber plate ensures
error-free transport and separation of documents. The plate spring



presses the document to the paper feed roller to assure smooth feed-
ing of the document.
2) Document separation method: Separation rubber plate
Separation rubber
 
3-3. Documents applicable for automatic feed
4x6 series
(788mm x 1091mm x
1000 sheets)
Minimum
Feeder capacity 20 sheets, max.
Paper weight
Paper thickness (ref.) 0.06mm
Paper size 128mm x 148mm ~ (MIN. SIZE)
A4 (210mm x 297mm), Letter (216mm x 279mm)
NOTE: Double-side coated documents and documents on facsimile re-
cording paper should be inserted manually. The document feed
quantity may be changed according to the document thickness.
Documents corresponding to a paper weight heavier than 64.3kg (74.3g/
m 2 ) and lighter than 135kg (157g/m
Documents heavier than 135kg in terms of the paper weight must be
duplicated on a copier to make it operative in the facsimile.
3-4. Loading the documents
1) Make sure that the documents are of suitable size and thickness,
and free from creases, folds, curls, wet glue, wet ink, clips, staples
and pins.
2) Place documents face down in the hopper.
i) Adjust the document guides to the document size.
ii) Align the top edge of documents and gently place them into the
hopper. The first page under the stack will be taken up by the
feed roller to get ready for transmission.
NOTES: 1) Curled edge of documents, if any, must be straighten
out.
2) Do not load the documents of different sizes and/or
thicknesses together.
3 – 1
UX-510UA
FO-1470U


Paper feed spring
 
 
Paper feed arm
Paper feed roller
Fig. 3
Square
meter series
Maximum Minimum
45kg 64.3kg 52g/m 2
0.09mm 0.06mm
2 ) are acceptable for manual feed.
Maximum
74.3g/m 2
0.09mm