This section covers the structure, functions, operation and method of
disassembling and assembling the machine.
Observe the following precautions when performing disassembly and
assembly work.
1. Be sure to unplug the power cord before working on the machine.
2. Perform all reassembly work by reversing the order in which the
component was disassembled, unless otherwise specified.
3. Do not lose small parts (screws, etc.) or insert them in the wrong
place.
4. Install all parts completely before operating the machine.
5. Do not loosen the screws indicated as disallowed for removal.
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1
LT-352
Page 4
LT-352 PRODUCT SPECIFICATIONS
LT-352
1. Type
Type: Large capacity paper feed tray mounted on side of
the main body.
2. Functions
Paper size:A4, 8.5" x 11"
Kind of paper:High quality paper (60 g/m
Maximum capacity: 3500 sheets (80 g/m
2
)
2
- 90 g/m2)
3. Machine Data
Power supply:5, 24 and 40 VDC (Supplied from the
main body.)
Maximum power consumption
Weight:Approx. 26.6 kg
Machine dimensions
: 82 VA
: W 366 x D 553 x H 645
(Unit = mm)
4. Maintenance
Maintenance: Same as the main body
Machine life: Same as the main body
5. Operating Environment
Temperature: 10 to 33°C
Humidity: 10 to 80%RH
Note: The contents of this manual may be changed without
prior notice for the sake of improvement.
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Page 5
LT-352
CENTER CROSS-SECTIONAL DRAWING
Double feed
prevention roller
Conveyance roller
Up/down plate
Feed roller
Paper feed roller
Upper cover
Remaining paper
indication belt
Up/down belt
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Page 6
DRIVE SECTION
<Conveyance drive section>
Conveyance roller
LT-352
Paper feed motor
(M800)
Double feed prevention roller
Paper feed clutch
(MC800)
Feed roller
Paper feed roller
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Page 7
LT-352
<Stacker drive section>
Up/down belt
Up/down plate
Remaining paper
indication belt
Up/down motor
Up/down shaft
1 - 4
Page 8
PAPER FEED SECTION
[1] Composition
Down button
LT-352
LT upper limit detection PS (PS801)
Paper feed roller unit
Up/down plate (Tray)
[2] Mechanisms
MechanismMethod
Paper liftingBelt drive
*1
Paper feed1st paper feed roller
No paper detectionPS800
Paper size detectionNone
Remaining paper indicator
*2
Paper conveyanceRoller conveyance
Paper sizeA4, 8.5" x 11"
*1: Paper lifting
a. Lifting operation of the up/down plate
The up/down plate is lifted by belt drive.
When the upper cover is closed, the up/down plate
drive motor (M801) rotates, causing the up/down plate
coupled to the up/down drive belt to raise.
Linked to up/down plate
LT no paper detection PS (PS800)
b. Lowering operation of the up/down plate
When the upper cover is opened, the up/down plate
automatically falls 100 mm.
Subsequently, each time the down button is pressed,
the up/down plate falls a distance equal to the height of
the loaded paper.
*2: Remaining paper indicator
The amount of paper remaining in the paper tray can
be judged from the state of the indicator belt that is
visible from the front slit.
The indicator belt is directly linked to the up/down
motion of the up/down plate.
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Page 9
LT-352
[3] Disassembly and Reassembly
1. Removing and Re-installing the Paper Feed roller
Unit
a. Procedure
(1) Open the upper cover.
(2) Remove the spring from the paper feed roller unit.
Upper cover
Spring
Paper feed
roller unit
2. Replacing the paper feed roller Rubber and the Feed
roller Rubber
a. Procedure
(1) Remove the paper feed roller unit.
(2) Remove the three stop rings and the three bearings on
the paper feed roller unit, and also the paper feed
reference actuator and the two shafts, then remove
each roller.
(3) Remove the rubber (feed rubber/A and double feed
prevention rubber) from each roller.
Paper feed
drive belt
Bearing
Feed rubber/A
Double feed
prevention
rubber
Paint mark
Feed roller
Blue mark
Stop ring
Bearing
Stop ring
(3) Remove the two stop rings and the two bearings, then
remove the paper feed roller unit.
Paper feed
roller unit
Bearing
Stop ring
Bearing
Stop ring
(4) Re-install the paper feed roller in the opposite se-
quence to removal.
Paper feed roller
Blue mark
Bearing
Stop ring
Paper feed
reference actuator
(4) Re-install the above parts in the opposite sequence to
removal.
Caution: Ensure that the mounting direction of the rubber and
rollers are correct.
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Page 10
LT-352
3. Replacing the Double feed prevention roller rubber
a. Procedure
(1) Remove the three set screws, then remove the paper
feed cover (left).
Paper feed
cover (left)
Set screws
(2) Remove the two set screws, then remove the double
feed prevention roller unit. (When re-installing the unit,
align the drive coupling pin, then insert the two projections on the unit into the square holes before fixing the
two set screws.
(3) Remove the two stop rings, then pull out the shaft and
remove the double feed prevention roller together with
the paper feed reversal gear.
Paint mark
Double feed
prevention roller
(rubber)
Paper feed
Stop ring
Shaft
reversal gear
Stop ring
(4) Remove the double feed prevention rubber from the
double feed prevention roller.
(5) Re-install the above parts in the opposite sequence to
removal.
Caution: Ensure that the mounting direction of the rubber is
correct.
Double feed prevention
roller unit
Set screw
Set screw
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Page 11
LT-352
4. Replacing the LT Clutch
a. Procedure
(1) Remove the four set screws, then remove the right
side cover.
Set screw
Set
screw
Right side cover
Set screw
Set screw
(2) Remove the four set screws, then remove the front
cover.
(3) Remove the two set screws, then remove the upper
cover.
Set screw
<Front>
Set screw
<Rear>
(4) Remove the four set screws, then remove the paper
feed cover (upper).
(5) Remove the three set screws, then remove the paper
feed cover (left).
Set screw
Set screw
Set screw
Front cover
Set screw
Paper feed cover
(upper)
Set screws
Set screws
Paper feed
cover (left)
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Page 12
LT-352
(6) Disconnect the three relay connectors.(8) Remove the two set screws fixing the clutch cover from
the rear.
Relay connector (Large)
Relay
connector
(White)
Relay
connector
(Black)
(7) Remove the two E rings, then remove the two bear-
ings.
Set screw
Set screw
(9) Remove the hex socket screw, then remove LT clutch/2.
LT clutch/2 projection
Bearing
Bearing
Hex socket
screw
E rings
C ring
(10)Re-install the above parts in the opposite sequence to
removal.
Note: When re-installing the LT clutch, ensure that the projec-
tion is at the top.
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Page 13
LT-352
[4] Centering adjustment of LT-352
Upper cover
Step
1
2
3
4
5
Set screws
Operation
Open the upper cover.
Slacken the side guide set screws (four each) at the
front and rear of the tray.
Move each side guide back and forth until the miscentering of the paper is within the standard value
range. (Move both guides by the same amount,
using the stamped marks on the guide reinforcing
plates (front/rear) and the LCT base plate below
them as a rough guide.)
Tighten the eight adjustment screws firmly, and
perform the centering adjustment for the 36 mode.
Repeat 1~4 until the miscentering value is within
the standard.
Set screws
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Page 14
2
DIAGRAMS
Page 15
LT-352 ELECTRICAL PARTS LAYOUT DRAWING
LT-352
12
3
9
8
14
11
2
1
7
10
5
4
13
6
1. Switch/Sensor
1PS800LT no paper detection PS
2PS801LT upper limit detection PS
3PS802LT pre try PS
4PS803LT conveyance PS
5PS804LT release PS
6PS805LT lower limit detection PS
7PS806LT pre feed PS
8SW800LT down SW
9SW801LT cover open/close SW
2. Load
10M800LT paper feed Motor
11M801LT up/down Motor
12MC800LT 1st paper feed MC