Sharp AR-LC6 Service Manual
SERVICE MANUAL
CODE: 00ZARLC6//A2E
DIGITAL COPIER/PRINTER/
MULTIFUNCTIONAL SYSTEM OPTION
LARGE CAPACITY TRAY
MODEL
CONTENTS
[1] OUTLINE OF THE PRODUCT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
[2] SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
[3] INTERNAL CONSTRUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
[4] OPERATIONAL DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
[5] DISASSEMBLY, ASSEMBLY, MAINTENANCE. . . . . . . . . . . . . . . 5-1
[6] ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
[7] TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
AR-LC6
[8] ELECTRICAL SECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Parts marked with “ ” are important for maintaining the safety of the set. Be sure to replace these parts with
specified ones for maintaining the safety and performance of the set.
SHARP CORPORATION
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
: Jan. 9 2004
1
[1] OUTLINE OF THE PRODUCT
This model is a large capacity paper feed tray installed to the main unit.
It stores 3,500 sheets, eliminating troublesome paper supply.
AR-LC6
[2] SPECIFICATIONS
Transport speed Corresponds to 55 – 70 sheet/min.
Transport reference Center reference
Paper size AB series A4
Inch series 8.5" x 11"
Paper size setting Not provided.
Factory setting of
paper size
Kind/weight of
applicable paper
Paper capacity 3,500 sheets (80g/m
Remaining paper
detection
Paper feed system Front loading, paper feed from the upper
Tray lift time Up: max. 15sec
Power consumption Normal operation 26.4W or less
1
Power source 24V and 5V are supplied from the main unit
External dimensions 376 (W) x 545.5 (D) x 517.5 (H) mm
Occupying area 376 (W) x 545.5 (D) mm
Weight About 35kg or less
Paper feed system Paper pick-up by the take-up roller, Torque
Humidifying heater Power supplied from the main unit, ON/OF
Factory setting AB series A4
AB series A4
Inch series 8.5" x 11"
Normal paper 60 – 105g/m
Enable (Paper empty and 6 steps)
section
Down: max. 5sec
Lift up
limiter reverse rotation separation system
control by the main unit
Heater kit support
Inch series LT
2
(16 – 28lbs)
2
)
42W or less
AR-LC6 OUTLINE OF THE PRODUCT 1 - 1
: Jan. 9 2004
1
[3] INTERNAL CONSTRUCTION
1. Motor, clutch, solenoid
3
5
4
1
2
1
No.
Code Signal name Name Type Function/Operation Active condition
1 LTM LTM Transport
1
2 LLM LLM Lift motor
1
3 LTCL LTCL Transport
4 LPFCL LPFCL Paper feed
5 LPSL LPSL Paper feed
1
motor
clutch
clutch
solenoid
Parts
Brushless
motor
Brush motor Lifts the paper feed table. When the lower limit sensor
Drives the paper feed, and the
paper transport section.
Controls ON/OFF of the
transport roller.
Controls ON/OFF of the paper
feed roller.
Presses the paper pickup roller
onto paper.
When paper feed is started,
"H" level.
is ON, "H" level. When the
upper limit sensor is ON, "L"
level.
When paper feed is started,
"H" level. After starring
transport (pickup OFF), it is
turned OFF by the timer.
Turned OFF after starting
transport. Turned ON by the
timer.
∗ Lift-up – When paper
empty detection is made:
ON
MODEL NOTE
AR-LC6 INTERNAL CONSTRUCTION 3 - 1
: Jan. 9 2004
1
2. PWB, sensor, switch, heater
1
17
14
13
12
16
11
15
7
9
10
8
No.
1
1
1
1
Code Signal name Name Type Function/Operation Active condition
7 MAIN PWB – LCC main
PWB
8 LLD LLD Lower limit
sensor
9 LRE LRE Lift motor
encoder
10 LCD LCD Cassette
detection
11 LTOD LTOD The main unit
connection
sensor
12 LTD LTD Transport
sensor
13 LUD LUD Upper limit
sensor
14 LPED LPED Paper
presence/
empty sensor
15 LLSW LLSW Upper limit
switch
16 LOSW LOSW Upper open/
close switch
17 DH DH Thermal
heater
Parts
Controls and drives the LCC.
The lower limit of the tray is
detected.
The lift motor rotation is
detected.
The tray insertion is detected.
Detects connection to the main
unit.
Detects paper transport.
Detects the paper upper limit
position.
Detects paper presence/empty
on the paper tray.
Protects the paper feed unit
from breakage due to lifting the
tray too much.
Detects open/close of the
upper door.
Keeps temperature in the LCC
tray.
MODEL NOTE
When lifting up, "L" level.
Pulse signal
When inserted, "H" level.
When connected, "H" level.
"L" level at paper
remaining detection.
When "H" level (ON), the
lift-up motor stops.
When paper is detected,
"H."
∗ When lifting up, if "L"
with LRE 800 pulse, the
paper feed solenoid is
ON.
Japan
only
AR-LC6 INTERNAL CONSTRUCTION 3 - 2
: Jan. 9 2004
1
[4] OPERATIONAL DESCRIPTIONS
1. Lift operation
When the main unit is turned ON, if the tray is at the lower limit position
(lower limit sensor: LLD ON position), the lift motor is turned ON to lift
the tray.
When the paper presence/empty sensor (LPED) is turned ON within
800 pulses of the encoder signal from start of lifting up the tray, the lift
motor is turned OFF to stop the tray, and the paper feed solenoid is
turned ON to mode down the pickup roller. After that, the lift motor is
turned ON to lift the tray. The tray is stopped when the upper limit sensor (LUD) is turned ON.
If the paper presence/empty sensor (LPED) is not turned on within 800
pulses, the paper feed solenoid is turned ON with the lift motor ON to
move down the pickup roller. Then, the lift motor is turned ON again to
lift the tray. The lift motor is stopped at the upper limit sensor (LUD) ON
position, and the paper feed solenoid is turned OFF.
When the machine power is turned on, if the tray is on the paper feed
position, lifting is not performed.
When the tray is pulled out, it moves down by its own weight.
Lifting up operation (When LPED is turned ON within 800 pulses
of encoder.)
(Lift motor output)
LLM
LLD
(Lower limit sensor)
LUD
(Upper limit sensor)
LPED
(Paper empty detection)
LPSL
(Solenoid)
LRE
(Encoder signal)
Within 800 pulses
200 msec
2. Paper feed operation
When the tray is stationary at the paper feed position (upper limit sensor: LUD ON position) and there is paper on the tray, paper feed operation can be performed.
Paper feed operation is performed by the transport motor (LTM), the
transport clutch (LTCL), the paper feed clutch (LPFCL), and the paper
feed solenoid (LPSL) at the following timing.
LCC paper feed time chart
Paper feed start
Clearance-betweenpapers control timer
Clearance-between-
papers control timer
Lifting up operation (When LPED is not turned ON within 800
pulses of encoder.)
(Lift motor output)
(Lower limit sensor)
(Upper limit sensor)
(Paper empty detection)
(Encoder signal)
When the transport clutch (LTCL) is turned ON with the transport motor
1
LLM
LLD
LUD
LPED
LPSL
(Solenoid)
LRE
Within 800 pulses
(LTM) ON (rotating), the transport roller rotates. When the paper feed
clutch (LPFCL) is turned on under this state, the paper feed roller and
the take-up roller rotate. When the paper feed solenoid (LPSL) is
turned ON, the take-up roller is pushed down to press paper.
Resist stop Resist stop Resist stop
Clearance-betweenpapers control timer
Clearance-betweenpapers control timer
(Transport motor)
(Transport sensor)
(Paper feed solenoid)
(Paper feed clutch)
(Transport clutch)
synchronous signal)
1
LTM
LTD
LPSL
LPFCL
LTCL
TRC
(Main unit
Preliminary
paper feed start
First sheet
PIC drop timer PIC drop timer PIC drop timer PIC drop timer
Paper feed clutch
Preliminary paper
feed complete
Paper feed start
OFF timer
Preliminary
paper feed start
Second sheet
Preliminary paper
feed complete
Paper feed start
Paper feed clutch
OFF timer
Preliminary
paper feed start
Third sheet
Paper feed clutch
OFF timer
Preliminary
paper feed start
Fourth sheet
Preliminary paper
feed complete
Paper feed start
AR-LC6 OPERATIONAL DESCRIPTIONS 4 - 1
Paper feed clutch
OFF timer
Preliminary paper
feed complete
Paper feed clutch
OFF timer
Preliminary
paper feed start
Fifth sheet
Preliminary paper
feed complete
: Jan. 9 2004
1
1 Paper feed roller clutch
2 Take-up roller
3 Paper feed roller
4 Paper feed solenoid
5 Transport clutch
6 Transport motor
7 Lift-up motor
1
5
1
4
1
6
3
7
2
3. Paper empty detection
When the tray lifts and stops at the paper feed position and during
paper feed operation, paper presence/empty is detected by the paper
presence/empty sensor (LPED).
When paper empty is detected in the tray during paper feeding, paper
feeding is stopped.
AR-LC6 OPERATIONAL DESCRIPTIONS 4 - 2
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