Sharp AR-651 (serv.man6) Service Manual ▷ View online
AR-651/810 COMPONENT LAYOUT & FUNCTIONS 2 - 25
COPSW
COV-OPN-SW
Interrupts power to the DF motors
Micro switch
Cover open/close switch
when the top cover is open
DFOPSW
DF-OPN-SW
Interrupts power to the DF motors
Micro switch
RADF open/close switch
when the DF unit is up
DFOPNS
DF-OPN-SNS
Detecting if RADF is opened/closed
Semiconductive
RADF open/close sensor
photosensor
APS
AUTO-PS-SNS
Detecting the angle opened and
Semiconductive
APS operation sensor
switching ON/OFF of the APS sensor photosensor
COPS
COV-OPN-SNS
Detecting if the jam access cover is
Semiconductive
Cover open/close sensor
opened/closed
photosensor
EMPS
EMP-SNS
Detecting the presence or absence of Semiconductive
Empty sensor
original during feeding
photosensor
ULMTS
UP-LMT-SNS
Detecting the upper limit of the lifting tray Semiconductive
Upper limit sensor
photosensor
SIZES1
SIZE-SNS1
Detecting the original width
Semiconductive
Original width sensor 1
photosensor
SIZES2
SIZE-SNS2
Detecting the original width
Semiconductive
Original width sensor 2
photosensor
SIZES3
SIZE-SNS3
Detecting the original width
Semiconductive
Original width sensor 3
photosensor
REGS
REG-SNS
Detecting original at the registering
Semiconductive
Registration sensor
section
photosensor
TRYS
TRY-SNS
Detecting the original length on the tray Semiconductive
Tray sensor
photosensor
LLMTS
LO-LMT-SNS
Detecting the lower limit of the lifting tray Semiconductive
Lower limit sensor
photosensor
ITFS
INT-F-SNS
Detecting original on the small original Semiconductive
Intermediate transport
transport path
photosensor
sensor
SOES
SO-EX-SNS
Detecting original at the small original Semiconductive
Small original exit sensor
exit
photosensor
READS
READ-SNS
Detecting original at the scanning
Semiconductive
Read sensor
section
photosensor
LNGS
LENG-SNS
Detecting the original length
Semiconductive
Original length sensor
photosensor
SSBS
SO-SB-SNS
Detecting original at the small original Semiconductive
Small original reverse
reverse section
photosensor
sensor
TRVR
TRY-VR
Detecting the original width on the tray Rotary volume
Tray width sensor
LOES
LO-EX-SNS
Detecting original at the large original
Semiconductive
Large original exit sensor exit
photosensor
(4) Switches and sensors
Symbol
Name
Function
Remarks
AR-651/810 COMPONENT LAYOUT & FUNCTIONS 2 - 26
2. 5. System Block Layout
Ser
ial-I/F
ADF
Finisher
LCF
IPC
M-CPU
Gate
Arr
a
y
PFC
PW
A-F-LGC-340
SRAM
Flash
RO
M
NVRAM
Ser
ial-I/F
ADR/DA
T -Bus
PW
A-F-SLG-340
S-CPU
SRAM
ADR/DA
T -Bus
Ser
ial-I/F
Image Data
ASIC
Image Data
PW
A-F-CCD2-340
CCD
Amp
Amp
A/D
A/D
ASIC
PW
A-F-PLG-340
D/A
L-CPU
D/A
SRAM
ADR/DA
T -Bus
Galv
ano
DR
V
ASIC
Galv
anic
Mirror
Laser Unit
Laser
Beam
Sensor
PW
A-F-LDR-340
LD
Image Data
ASIC
ASIC
PW
A-F-LDR-340
LD
ASIC
SRAM
Flash
RO
M
ADR/DA
T -Bus
PW
A-F-SYS-340
or
PCI-Bus
Image Data
Image Data
ASIC
HDD
PWA-F-SCN-340
SDRAM
CPU
SRAM
Flash
RO
M
IDE-I/F
Do
wnload
JIG
ASIC
Printer Board
Printer
Controller
Controller
Local-
Bus
RT
C
NVRAM
SDRAM
32
32
32
32
32
16
4
8
32
16
32
16
32
Flash
RO
M
32
32
Ser
ial-I/F
32
8
8
8
8
Ser
ial-I/F
T
ANDEM LCF
D/A
Flash
RO
M
Flash
RO
M
PW
A-F-SNS-340
ASY-COMPANE
1
2 3
4
5 6
7
8 9
0
CLR
LCD
COPY
AR-651/810 COMPONENT LAYOUT & FUNCTIONS 2 - 27
2. 6. Disassembly and Replacement of
Covers and PC boards
2. 6. 1. Covers
[A] Front cover/Front side right inner cover
(1) Open the front cover.
(2) Pull out 2 L-shaped pins and take off the front
cover.
(3) Remove 2 screws and take off the front side
right inner cover.
[B] Feed side rear cover/Feed side top cover/
Feed side center cover
(1) Remove 1 screw and take off the feed side
rear cover.
(2) Remove 2 screws and take off the feed side
top cover.
(3) Open the bypass unit tray and remove 2
screws. Then remove 6 screws and take off
the feed side center cover.
[C] Exit side top cover/Exit side rear cover/
Exit side bottom cover
(1) Remove 2 screws and take off the exit side
top cover.
(2) Remove 1 screw and take off the exit side
rear cover.
(3) Remove 6 screws and take off the exit side
bottom cover.
L-shaped
pin
pin
Front cover
Front side right inner cover
Feed side
rear cover
rear cover
Feed side
top cover
top cover
Exit side
rear cover
rear cover
Exit side
top cover
top cover
Exit side
bottom cover
bottom cover
Feed side
center cover
center cover
AR-651/810 COMPONENT LAYOUT & FUNCTIONS 2 - 28
[D] Rear cover
(1) Loosen 1 screw (shown by a white arrow),
remove 6 screws, release 2 hooks and take
off the rear cover.
[E] Right top cover
(1) Remove 1 screw and take off the right top
cover.
[F] Left top cover
(1) Remove 1 screw and take off the left top
cover.
Left top cover
Right top cover
Hook
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