UX-P115U
3 – 2
3.5. Documents requiring use of the copy
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.
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
5.1. Driving
In the drive mechanism, the rotating force of the pulse motor for both
transmission and reception is transmitted to the paper supply roller,
the recording paper feed roller and imaging film drive gear through the
pulse motor axle gear, reduction gear and planetary gear.
5.2. Recording
This equipment employs the thermal transcription system which uses
the thermal head imaging film.
5.2.1 Thermal head
The thermal head is composed of 2,016 heating elements in traverse
line, and the resolution power is 8 dots/mm. The maximum speed is 10
ms/line.
5.2.2 Structure of recording mechanism
Recording is achieved by applying a suitable pressure to the thermal
head through the imaging film of the recording paper feed roller and
the recording paper.
The main scanning is electronically performed, and the sub-scanning
is mechanically performed (by sending the recording paper with the
recording paper feed roller).
5.2.3 Recording paper transfer sequence
1) The recording paper stored in the paper tray ass’y is fed with the
PU roller, and is stopped when the P-IN sensor is turned on by
sensing its lead edge.
2) Hereafter, the imaging film and recording paper are transferred with
the recording paper feed roller, and thermal transcription is per-
formed on the recording paper.
3) After thermal transcription, the imaging film is taken up by the roller
on the take-up side, and the recording paper is discharged by the
back roller.
Troubleshooting the density unevenness mainly results from the
longitudinal misalignment of the thermal head to the heater line.
Otherwise, the head is in uneven contact with the recording paper
feed roller, or the imaging film is wrinkled.
The following items are described as the simplified checking
method.
a) Are the power and signal cables of the thermal head suitably
treated?
b) Does the same symptom appear even if the thermal head pres-
sure spring is replaced?
c) Is the feed roller of the recording paper concentric? (Density is
uneven at intervals.)
d) Does the same symptom appear even if the thermal head is
replaced?
e) Is the imaging film stained or wrinkled?
5.3. General view
Fig. 4
Paper feed plate
Paper feed roller
Separate
rubber
Separate
plate
First page of
document
Back of
document
Last page of
document
Fig. 5
Paper
tray
extension
(Accessory)
Paper
tray ass'y
(Accessory)
Release lever
P-IN sensor lever
(Upper)
Film sensor lever
Thermal head
Platen roller
PU roller
Imaging film
(Supply side)
Imaging film
(Take-up side)
Separate rubber
Feed plate
