Sharp UX-B20 Service Manual page 39

Last page of document
Paper feed plate
Separate rubber
Separate plate
Sub feed plate
Document guide upper
3.5. Documents requiring use of document carrier
1) Documents smaller than 148mm (W) x 140mm (L).
2) Documents thinner than the thickness of 0.06mm.
3) Documents containing creases, folds, or curls, especially those
whose surface is curled (maximum allowable curl is 5mm).
4) Documents containing tears.
5) Carbon-backed documents. (Insert a white sheet of paper between
the carbon back and the document carrier to avoid transfer of car-
bon to the carrier.)
6) Documents containing an easily separable writing material (e.g.,
those written with a lead pencil).
7) Transparent documents.
8) Folded or glued documents.
Document in document carrier should be inserted manually into the
feeder.
5.1. General view
Back of document
First page of document
Document
Document guide lower
Paper feed roller
Fig. 4
Print cartridge
Star wheel
Paper
Exit roller
4. Document release
4.1. General
To correct a jammed document or to clean the document running sur-
face, pull the insertion side of document center of the operation panel.
To open the upper document guide, the operation panel must be
opened first.
5. Recording block
1) The pulse motor is rotated by the PICK UP ROLLER to feed the
recording sheet. The PICKUP ROLLER feeds one by one from the
top sheet.
2) The recording sheet contacts the P-IN SENSOR.
3) The FEED ROLLER rotates in the reverse direction of paper feed
(refer to the figure of PICKUP ROLLER). The tip of recording sheet
is set parallel to the FEED ROLLER when it reaches to the FEED
ROLLER and the PRESS ROLLER after through the PICK UP
ROLLER.
4) Then the FEED ROLLER rotates in the paper feed direction to feed
the recording sheet downwards. (refer to the figure of PAPER
FEED)
5) The CARTRIDGE prints the recording sheet, which is then ejected
by the EXIT ROLLER and STAR WHEEL.
Pick up roller
Housing buckler B
Feed roller
Fig. 5
3 – 2
UX-B20U/UX-B20C/B25C
Friction pad
Housing buckler rubber
P-IN sensor
Press roller