Sharp AR-285 (serv.man10) Service Manual ▷ View online
B. PWB location
No.
Name
Function, operation
1
Operation key PWB L
Key input
2
LCD unit
Operation input, machine
state display
state display
3
Operation key PWB R
Key input
4
Invertor PWB
LCD backlight control
5
Operation control PWB
Operation input, display
control
control
6
Fusing interface PWB
Fusing unit, PCU interface
7
Copy lamp lighting PWB
Copy lamp lighting control
8
CCD PWB
Document image input
9
Copy lamp lighting interface
PWB
PWB
Copy lamp, PCU interface
10
Document size detecting
PWB (Light emitting side)
PWB (Light emitting side)
Document size detection
11
Scanner driver PWB
Optical system scanner unit
drive
drive
12
PCU PWB
Overall control of the copier
and options
and options
13
AC power PWB
AC power input
No.
Name
Function, operation
14
DC power PWB
DC power supply
15
High voltage PWB
Process high voltage, bias
voltage supply
voltage supply
16
Lift-up motor PWB
Paper tray bottom plate lift
up
up
17
Paper transport sensor
PWB
PWB
Paper transport detection
18
ICU PWB
Image process, image data
communication control
communication control
19
Multi feed tray paper size
detection PWB
detection PWB
Document size detection
20
Drum marking sensor PWB
21
Process control PWB
22
Process thermistor PWB
Temperature detection in
the process unit
the process unit
23
Document size detecting
PWB (Light receiving side)
PWB (Light receiving side)
Document size detection
24
Discharge lamp PWB
OPC drum discharge
1
2
3
4
5
7
9
8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
6
6 – 4
C. Sensor location
No.
Signal name
Function, operation
1
OCSW
Document cover open/close detection
2
PSD
Separation detection
3
PPD2
PS paper detection
4
MPED
Manual paper feed paper empty detection
5
MPLD1
Manual paper feed paper length detection 1
6
MPLD2
Manual paper feed paper length detection 2
7
MPLS1
Manual paper fed tray pull-out detection 1
8
MPLS2
Manual paper feed tray pull-out detection 2
9
PPD1
Paper transport detection 1
10
DSWR
Right door open/close detection
11
PFD
Paper transport detection 1
12
TFD
Waste toner full warning detection
13
LUD1
Upper cassette upper limit detection
14
LUD2
Lower cassette upper limit detection
15
PED1
Upper cassette paper empty detection
16
PED2
Lower cassette paper empty detection
17
DSWLL
Left lower door open/close detection
18
DH SW
Dehumidifier heater switch
19
MEM SW
Memory switch
20
POD3
Paper exit detection (Second paper exit)
21
DSBD
ADU reverse section detection
No.
Signal name
Function, operation
22
POD2
Paper exit detection (ADU)
23
DSWL
Left upper door open/close detection
24
POD1
Paper exit detection (after fusing)
25
MAIN SW
Power switch
26
MHPS
No. 1 mirror home position detection
27
DSWF
Front cover open/close detection
28
LCSPD1
No. 2 tray paper remaining detection 1
29
UCSPD1
No. 1 tray paper remaining detection 1
30
Operation
PWB
thermistor
PWB
thermistor
Operation PWB peripheral temperature
detection
detection
31
Process
section
thermistor
section
thermistor
Process section peripheral temperature
detection
detection
32
Fusing
section
thermistor
(Center)
section
thermistor
(Center)
Heat roller temperature detection
33
Fusing
section
thermistor
(Sides)
section
thermistor
(Sides)
Heat roller temperature detection
25 MAIN SW
26 MHPS 27 DSWF
1 OCSW
2 PSD
3 PPD2
4 MPED
5 MPLD1
6 MPLD2
8 MPLS2
7 MPLS1
9 PPD1
10 DSWR
11 PFD
12 TFD
13 LUD1
15 PED1
15 PED1
14 LUD2
16 PED2
28 LCSPD1
29 UCSPD1
17 DSWLL
18 DH SW
19 MEM SW
20 POD3
21 DSBD
22 POD2
23 DSWL
24 POD1
32 , 33
30
31
6 – 5
D. Motor location
No.
Abbreviation
Name
Type
1
SFM
Suction fan motor
Fan motor
2
SCM
Scanner motor
Stepping motor
3
MM
Main motor
Brushless motor
4
TM
Toner motor
Synchronous motor
5
LUM1
Upper stage lift-up
motor
motor
Synchronous motor
6
LUM2
Lower stage lift-up
motor
motor
Synchronous motor
7
DCFM
Power fan motor
Fan motor
No.
Abbreviation
Name
Type
8
ICUFM
ICU fan motor
Fan motor
9
LSUFM
LSU fan motor
Fan motor
10
PCFM
Process fan motor
Fan motor
11
VFM1
Exhaust fan motor 1
Fan motor
12
VFM2
Exhaust fan motor 2
Fan motor
13
VFM4
Exhaust fan motor 4
Fan motor
14
VFM5
Exhaust fan motor 5
Fan motor
15
VFM3
Exhaust fan motor 3
Fan motor
16
VFM6
Exhaust fan motor 6
Fan motor
1 SFM
2 SCM
3 MM
4 TM
5 LUM1
7 DCFM
6 LUM2
8 ICUFM
9 LSUFM
10 PCFM
16 VFM6
15 VFM3
14 VFM5
13 VFM4
12 VFM2
11 VFM1
F. Clutch solenoid
No.
Abbreviation
Function, operation
1
PSPS
Paper separation solenoid
2
RRC
Resist roller clutch
3
MPFC
Manual paper feed clutch
4
MPFS
Manual paper feed solenoid
5
TRC2
Paper transport clutch
6
CPFC1
Upper stage cassette paper feed clutch
7
CPFS1
Upper cassette paper feed solenoid
8
CPFC2
Lower cassette paper feed clutch
No.
Abbreviation
Function, operation
9
CPFS2
Lower cassette paper feed solenoid
10
OGS
Two-stage paper exit tray solenoid
11
MTRC
Transport roller clutch (low)
12
TRC2
Transport roller clutch (high)
13
TRC1L
Vertical transport roller/paper feed roller low
clutch
clutch
14
TRC1H
Vertical transport roller/paper feed roller
high clutch
high clutch
10 OGS
1 PSPS
2 RRC
3 MPFC
4 MPFS
5 TRC2
6 CPFC1
7 CPFS1
8 CPFC2
9 CPFS2
11 MTRC
13 TRC1L
14 TRC1H
6 – 6
G. RADF (AR-285/335 only)
1) Main parts
No.
Function, operation
1
Original stopper
2
A21 weight plate
3
Semi-circular roller
4
Paper exit roller
5
Flapper
6
Reverse roller
7
Transport belt follower roller
8
Original transport belt
9
Transport belt drive roller
10
Paper feed roller
11
Resist roller
12
Separation roller
2) PWB distribution
No.
Name
Function, operation
1
Control PWB
RADF unit control, PCU
communication
communication
2
Reverse sensor PWB
Document reverse detection
3
LED PWB
Document feed, document
remaining display
remaining display
4
Original timing sensor
PWB
PWB
Document timing detection
5
Original reverse
sensor PWB
sensor PWB
Document feed detection
3) Motors, solenoids, and clutches
No.
Code
Name
Type
1
DFM
Paper feed motor
DC motor
2
DTM
Transport motor
Stepping motor
3
DRM
Reverse motor
Stepping motor
4
DFSOL
Paper feed solenoid
DC solenoid
5
DRSOL
Reverse solenoid
DC solenoid
4) Sensors, switches, detectors
No.
Code
Functions and operations
1
DFD
Turns HIGH when the original lead edge is fed
just in front of the resist roller.
just in front of the resist roller.
2
DTD
Turns HIGH when the original lead edge is
transported from the paper feed section to the
vicinity of the transport belt.
transported from the paper feed section to the
vicinity of the transport belt.
3
RDD
Turns HIGH when the original lead edge is
transported to the reverse/paper exit path.
transported to the reverse/paper exit path.
4
DWVR
Original width detection on the tray
5
DLS1
Original length detection on the tray
6
DLS2
Original length detection on the tray (Inch series
only)
only)
7
DSS
Original detection on the tray
8
DFMRS
Paper feed motor rotation detection
9
DWS
Original width detection
10
AUOD
ADF unit open/close detection
11
FGOD
Paper feed cover open/close detection
12
TGOD
Reverse cover open/close detection
12
1
2
3
4
5
6
7
8
9
10
11
1 OPCLS
4 DWTR
3 SIZ2
2 SIZ1
7 POS
6 REGS
8
14
13
10
11
12
9 DTM
5 EMPS
3 DRM
2 DTM
1 DFM
4 DFSOL
5 DRSOL
10 AUOD
8 DFMRS
7 DSS
5 DLS1
12 TGOD
4 DWVR
11 FGOD
9 DWS
1 DFD
2 DTD
3 RDD
6 DLS2
6 – 7
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