DOWNLOAD Sharp AR-LC1 (serv.man2) Service Manual ↓ Size: 843.46 KB | Pages: 30 in PDF or view online for FREE

Model
AR-LC1 (serv.man2)
Pages
30
Size
843.46 KB
Type
PDF
Document
Service Manual
Brand
Device
Copying Equipment / ARLC1 Service Manual
File
ar-lc1-sm2.pdf
Date

Sharp AR-LC1 (serv.man2) Service Manual ▷ View online

[4] EXTERNAL VIEW AND INTERNAL CONSTRUCTION
1. External view
1. Tray down button/lamp
The tray can be opened by pressing the button. Use this button when adding paper or paper jam occurs.
2. Main parts
No.
Name
No.
Name
1
Transport roller
2
Paper feed roller
3
Hitching roller
4
Reversion roller
5
Tray
6
Lift-up unit
7
Encoder
8
Height adjustment unit
9
Caster
1
1
2
3
4
5
6
7
8
9
4 – 1
PWB location
No
Name
Function and operation
1
Control PWB
Controlling LCC
2
Tray switch PWB
Tray lifting switch
Motor, clutch, solenoid, motor
Motor
No.
Symbol
Name
Function and operation
1
LPFM
Paper feed and transport motor
Driving paper feed and transport systems
2
LLM
Lift-up motor
Driving tray lifting up
Clutch and solenoid
No.
Symbol
Name
Function and operation
3
LPFC
Paper clutch
Driving paper clutch
4
LPFS
Pick-up solenoid 
Operating pick-up roller
Motor
No.
Symbol
Name
Function and operation
5
HT
Dehumidifying motor
Dehumidifying paper and preventing condensation of dew.
1
2
4 LPFS
3 LPFC
1 LPFM
2 LLM
5 HT
4 – 2
Sensor, detector location
No.
Symbol
Name
Function and operation
1
LPFD
Transport detector 
Detecting paper discharge
2
LLSW
Upper limit lock switch
Detecting tray upper limit lock (Shutting off motor as a safety device.)
3
LPED
Paper detector 
Detecting the presence of paper
4
LUD
Upper limit detector 
Detecting tray upper limit position
5
LRES 
Encoder sensor
Controlling lifting up
6
LDD
Lower limit detector
Detecting tray lower limit position
7
LTOD
Copier connection detector
Detecting connection to copier
1 LPFD
7 LTOD
5 LRES
6 LDD
2 LLSW
4 LUD
3 LPED
4 – 3
[5] OPERATING PRINCIPLE
1. Lift-up operation
When the copier is powered up, the main circuit checks the detection
state of each sensor. If the upper limit detector (LUD) is OFF, the
lift-up motor is turned on to elevate the tray till the position which
allows paper feed (upper limit detector ON).
1
Upper limit detector (LUD)
2
Paper detector (LPED)
3
Paper tray
4
Lower limit detector (LDD)
2. Lift-down operation
If no paper is present after paper feed, the main circuit detects the
ON condition of the paper detector (LPED) and turns on the lift-up
motor to descend the tray till the position at which the lower limit
detector (LDD) turns on (the tray can be drawn out).
The tray switch PWB indication LED blinks while the tray is lifting or
descending.
3. Paper feeding
When copying is started, the transport motor (LPFM) starts. Then, the
pick-up solenoid (LPFS) and paper feed clutch (LPFC) turn on. When
the solenoid is turned on, the paper hitching roller is lowered to
contact the paper.
When the clutch is turned on, both the paper feed roller and the
hitching roller rotate to start paper feeding. The paper is sent through
the transport sensor (D) to the copier.
1
Paper feed roller clutch (LPFC)
2
Paper hitching roller
3
Paper feed roller
4
Pick-up solenoid (LPFS)
1,2
3
4
LLMD
LLMU
LDD
LUD
5msec
30msec
Lifting (no paper, lifting from bottom to top)
Elevation starts
Reversion starts
About 100 msec
LLMD
LLMU
LDD
LUD
100msec
30msec
Lifting (no paper, descending from top to bottom)
Descending starts
1
2
4
3
4
2
3
LPFM
LPFC
LPFS
LPFD
Paper feed (Letter size, A4, B5)
Job start signal reception
Paper feed start signal reception
Paper feed finish
signal transmission
Job END signal
reception
5 – 1
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