DOWNLOAD Sharp AR-LC9 Service Manual ↓ Size: 3.83 MB | Pages: 44 in PDF or view online for FREE

Model
AR-LC9
Pages
44
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3.83 MB
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PDF
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Service Manual
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Device
Copying Equipment / ARLC9-Service Manual
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ar-lc9.pdf
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Sharp AR-LC9 Service Manual ▷ View online

AR-LC9  INTERNAL CONSTRUCTION  4 - 1
[4] INTERNAL CONSTRUCTION
1. Motor, clutch, solenoid
No.
Parts
MODEL
NOTE
Code
Signal name
Name
Type
Function/Operation
Active condition
1
LTM
LTM
Transport 
motor
Drives the paper feed, and 
the paper transport section.
When paper feed is started, 
"H" level.
2
LLM
LLM
Lift motor
Synchronous 
motor
Lifts the paper feed table.
When the lower limit sensor 
is ON, "H" level. When the 
upper limit sensor is ON, 
"L" level.
3
LTCL
LTCL
Transport 
clutch
Controls ON/OFF of the 
transport roller.
4
LPFCL
LPFCL
Paper feed 
clutch
Controls ON/OFF of the 
paper feed roller.
When paper feed is started, 
"H" level. After starring 
transport (pickup OFF), it is 
turned OFF by the timer.
5
LPSL
LPSL
Paper feed 
solenoid
Presses the paper pickup 
roller onto paper.
Turned OFF after starting 
transport. Turned ON by 
the timer.
Lift-up – When paper 
empty detection is made: 
ON
6
LTLSL
LTLSL
Tray lock 
solenoid
The tray is locked so that 
the tray cannot be pulled 
out during paper feed.
When paper feed is started, 
"H" level.
3
5
4
1
2
6
AR-LC9  INTERNAL CONSTRUCTION  4 - 2
2. PWB, sensor
No.
Parts
MODEL
NOTE
Code
Signal name
Name
Type
Function/Operation
Active condition
7
MAIN  PWB
LCC main 
PWB
Controls and drives the 
LCC.
8
LLD
LLD
Lower limit 
sensor
The lower limit of the tray is 
detected.
When lifting up, "L" level.
9
LRE
LRE
Lift motor 
encoder
The lift motor rotation is 
detected.
Pulse signal
10 LCD
LCD
Cassette 
detection
The tray insertion is 
detected.
11 LTOD
LTOD
The main unit 
connection 
sensor
Detects connection to the 
main unit.
12 LTD
LTD
Transport 
sensor
Detects paper transport.
When paper feed is 
performed, when the  paper 
feed solenoid is "L," it is "H" 
level.
13 LUD
LUD
Upper limit 
sensor
Detects the paper upper 
limit position.
When "H" level (ON), the 
lift-up motor stops.
14 LPED
LPED
Paper 
presence/
empty sensor
Detects  paper presence/
empty on the paper tray.
When paper is detected, 
"H."
When lifting up, if "L" with 
LRE 800 pulse, the paper 
feed solenoid is ON.
15 LLSW
LLSW
Upper limit 
switch
Protects the paper feed unit 
from breakage due to lifting 
the tray too much.
16 LOSW
LOSW
Upper open/
close switch
Detects open/close of the 
upper door.
7
8
9
10
11
14
12
13
15
16
AR-LC9  OPERATIONAL DESCRIPTIONS  5 - 1
[5] 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.)
Lifting up operation (When LPED is not turned ON within 800 
pulses of encoder.)
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.
When the transport clutch (LTRC) is turned ON with the transport
motor (LPFM) ON (rotating), the transport roller rotates. When the
paper feed clutch (LPFC) is turned on under this state, the paper
feed roller and the take-up roller rotate. When the paper feed sole-
noid (LPFS) is turned ON, the take-up roller is pushed down to
press paper.
During paper feed operation, the tray lock solenoid (LTLSL) is
turned ON to inhibit pulling out the tray.
LCC paper feed time chart
LLM
(Lift motor output)
LLD
(Lower limit sensor)
LUD
(Upper limit sensor)
LPED
(Paper empty detection)
LPSL
(Solenoid)
Within 800 pulses
200 msec
LRE
(Encoder signal)
LLM
(Lift motor output)
LLD
(Lower limit sensor)
LUD
(Upper limit sensor)
LPED
(Paper empty detection)
LPSL
(Solenoid)
LRE
(Encoder signal)
Within 800 pulses
LTM
(Transport motor)
LTD
(Transport sensor)
LTLSL
(Tray lock solenoid)
TRC
(Main unit
synchronous signal)
LTCL
(Transport clutch)
LPFCL
(Paper feed clutch)
LPSL
(Paper feed solenoid)
Paper feed start
Clearance-between-
papers control timer
PIC drop timer
PIC drop timer
PIC drop timer
PIC drop timer
Clearance-between-
papers control timer
Clearance-between-
papers control timer
Clearance-between-
papers control timer
Resist stop
Resist stop
Resist stop
Paper feed clutch
OFF timer
Paper feed clutch
OFF timer
Paper feed clutch
OFF timer
Paper feed clutch
OFF timer
Paper feed clutch
OFF timer
Preliminary
paper feed start
First sheet
Preliminary
paper feed start
Second sheet
Preliminary
paper feed start
Third sheet
Preliminary
paper feed start
Fourth sheet
Preliminary
paper feed start
Fifth sheet
Preliminary paper 
feed complete
Paper feed start
Preliminary paper 
feed complete
Paper feed start
Preliminary paper 
feed complete
Paper feed start
Preliminary paper 
feed complete
Preliminary paper
feed complete
AR-LC9  OPERATIONAL DESCRIPTIONS  5 - 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.
3
4
5
1
2
6
7
8
1
Paper feed roller clutch
2
Take-up roller
3
Paper feed roller
4
Paper feed solenoid
5
Transport clutch
6
Transport motor
7
Tray lock solenoid
8
Lift-up motor
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