Sharp AR-M351U / AR-M451U (serv.man14) Service Manual ▷ View online
AR-M351U/M451U, AR-M355U/M455U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 52
2) Pull out the harness from the scanner control PWB.
3) Remove the scan motor.
a-11. OC open sensor
1) Remove the rear cabinet.
2) Remove the OC open sensor.
a-12. Mirror home position sensor
1) Remove the rear cabinet.
2) Remove the mirror home position sensor.
a-13. Scanner control PWB
1) Remove the scanner rear lower cabinet.
2) Disconnect the connector and earth band, and pull out the
scanner control PWB.
∗
When the scanner control PWB is replaced, the EEPROM must
be replaced.
be replaced.
a-14. Scanner interface PWB
1) Remove the table glass.
2) Remove the PWB cover and the harness cover.
3) Remove the scanner interface PWB.
b. Lamp unit
1) Remove the table glass.
2) Remove the scan lamp unit.
1)
2)
3)
2)
3)
1)
1)
2)
3)
1)
1)
2)
2)
5)
3)
4)
1)
2)
3)
1)
2)
4)
AR-M351U/M451U, AR-M355U/M455U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 53
b-1. Reflector
b-1. Mirror
1) Remove the table glass.
2) Clean the reflector and the mirror.
b-3. Lamp
1) Remove the table glass.
2) Slide the lamp unit base to the notch section.
3) Flip the notch section Mylar and remove the screw. Slide the
lamp holder to the front side, and remove it upward from the
rear side. Remove the connector.
rear side. Remove the connector.
b-4. Inverter PWB
1) Remove the table glass.
2) Hold with your hand and remove the screw. Remove the con-
nector and remove the inverter PWB.
c. CCD lens PWB unit
1) Remove the table glass.
2) Remove the dark-box cover.
3) Remove the CCD lens PWB unit.
Note: The CCD lens PWB unit is factory-adjusted before
shipping.
Since these adjustments cannot be performed in the
market.
Never touch the screws other than screw 2) of the CCD
Never touch the screws other than screw 2) of the CCD
lens PWB unit.
1)
1)
1)
1)
1)
2)
2)
3)
1)
AR-M351U/M451U, AR-M355U/M455U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 54
c-1. CCD lens
1) Remove the table glass.
2) Remove the dark-box cover.
3) Remove the lens cover.
4) Clean the CCD lens and the CCD.
7. DSPF section
A. General
Sheet documents are automatically fed and transported for contin-
uous scanning.
uous scanning.
The DSPF (AR-EF3) supports duplex sheet to scan both of the
front and the back surfaces at a time.
front and the back surfaces at a time.
Note for CCD lens PWB unit installation
<1> Adjust the CCD unit adjustment value listed in the table
below with the scribed line on the lens base.
<2> Make a sample copy at the above position, and measure
the magnification ratio.
<3> Change the installing position in the horizontal direction to
adjust the magnification ratio.
• When the copy image is longer than the original, shift to the
positive (+) direction.
• When the copy image is shorter than the original, shift to the
negative (-) direction.
∗
1 scale of the scribed line corresponds to 0.3% of magnifica-
tion ratio.
tion ratio.
∗
If this adjustment is not satisfactory, make a fine adjustment
with SIM 48-1.
(Refer to the adjustment described below.)
with SIM 48-1.
(Refer to the adjustment described below.)
CCD adjustment value
+4 scales
5.0~
+3 scales
3.6~4.9
+2 scales
2.2~3.5
+1 scale
0.8~2.1
Reference
-0.6~0.7
-1 scale
-2.0~ -0.7
-2 scales
-3.4~ -2.1
-3 scales
-4.8~ -3.5
-4 scales
~ -4.9
CCD unit adjustment value
(+) direction
Reference line
(-) direction
1 scale: 1.4mm
1 scale: 1.4mm
AR-M351U/M451U, AR-M355U/M455U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 55
B. Major parts and signal functions
SCN
cnt
PWB
cnt
PWB
SPF
PWB
1
+24V3
CND
B
B6B-PH-K-S
2
3
/B
5
4
6
+24V3
/A
A
VAREF
+5V2
4
B12B-PHDSS-B
GND2
GND2
5
2
6
GND2
7
3
SPLS1
SPWS
+5V2
CNA
1
9
SPLS2
10
SRA-01T-3.2
2
1
+5V
3
B22B-PHDSS-B
CNB
GND2
5
7
4
SPED
8
9
10
14
15
16
12
18
22
20
+5V2
SCOV
GND2
+5V2
SPPD
GND2
+24V3
/SDSS
+5VPOD
SPOD
GND2
11
12
+24V3
/SPFS
/SPFS
GND2
1
1754873+179228-3
GND2
+5V2
1754873+179228-3
1
2
SPLS1
SPLS2
3
+5V2
3
2
GY
FG
SRA-21T-3
GY
GY
SRA-21T-3
11
/SDSS
2
1
1 +24V3
2
SPPD
GND2
+5V2
2
1754873+179228-3
3
1
SPED
GND2
+5V1
GND2
+5V2
SCOV
+5V2
GND2
SPPD
+24V3
/SDSS
PHNR-11-H+BU11P-TR-P-H
2
B3B-PH-K-S
3
1
3
2
1
PHNR-3-H+BU3P-TR-P-H
2
1
PHNR-2-H+BU2P-TR-P-H
/SRRC
+24V3
+24V3
/SPFC
+5VPOD
SPOD
GND2
(NC)
1
2
3
4
5
6
7
8
9
10
11
6
5
4
8
9
10
11
7
3
2
1
1
3
2
1754873+179228-3
GND2
+5V1
SPED
1
SCOV
3
1754873+179228-3
2
+5V2
GND2
SMP-02V-NC+SMR-02V-N
3
2
1
2
1
2
1
+24V3
/SPFC
+24V3
/SRRC
(NC)
PHNR-6-H+BU6P-TR-P-H
1
3
1754873+179228-3
2
+5V2
GND2
SOCD
+5V2
SOCD
GND2
6
19
13
17
21
1
3
VAREF
3
SPWS
2
GND2
1
SMR-03V-NC+SMP-03V-N
2
1
1
PHNR-2-H+BU2P-TR-P-H
2
2
+24V3
SOCD
SPOD
5
1
6
2
+5V2
3
6
+5VPOD
3
4
2
GND2
GND2
4
1
5
/SPFS
PHNR-6-H+BU6P-TR-P-H
+24V3
B
5
1
6
2
A
3
6
/B
3
4
2
/A
+24V3
4
1
5
2_DATA0+
2_CLK-
2_CLK+
RXD_CCD2
TXD_CCD2
CIS
cnt
PWB
CLK_CCD2
FRM_CCD2
B26B-PHDSS
9
1
20
24
18
7
17
15
10
21
23
25
5
26
13
4
19
6
8
12
11
14
2
16
22
3
CN1
2_DBL+
1
2
3
4
5
6
7
8
9
2_DBL+
/CIS_SET
9604S-35F
17
16
18
20
19
15
SCN
LGATE
CLK
2_DATA0+
2_CLK-
2_CLK+
DGND
DGND
VAS
GND2
GND2
SCLK
DGND
SD0
DGND
DGND
/LST
VLED
+5V2
DGND
DGND
DATA
DGND
DGND
2_DATA1-
/CIS_SET
25
26
+3.3V
2_DBL-
LD
SD1
VDS
DGND
DGND
CN3
1
2
3
4
5
6
GND2
ADD_CCD2
RES_CCD2
GND2
CN7
+3.3V
S26B-PHDSS
2_DATA1+
2_DATA0-
7
35
34
33
32
31
30
29
28
27
26
25
24
23
22
14
13
12
+12V1
11
10
9
8
GND2
GND2
+5V2
+12V1
FRM_CCD2
GND2
PAGE2
SD2
20
24
18
17
15
10
21
23
13
PAGE2
+24V3
RXD_CCD2
TXD_CCD2
CLK_CCD2
+3.3V
21
2_DBL-
DGND
+24V3
ADD_CCD2
RES_CCD2
+5V2
+5V2
+3.3V
DGND
SD3
DGND
SD4
DGND
SD5
DGND
SD6
DGND
SD7
19
12
11
14
16
22
GND2
8
7
a
b
c
SPFSET
SPWS
SPFMB
+24V3
VAREF
SDSS
SRRC
6
SPPD
GND2
5
4
3
1
+5V2
27
28
SPOD
SOCD
SPED
SPLS1
/SPFMA
SPFMA
SPFC
SCOV
SPFMO0
2
SPFS
SPLS2
GND2
/SPFMB
+5V1
GND2
+24V3
GND2
GND2
16
10
17
24
9
8
7
S28B-PHDSS
23
14
15
22
19
13
21
11
20
12
18
CN10
26
25
B26B-PHDSS-B
CNC
3
SPPD
/SPFMB
GND2
9
24
SPED
SOCD
SPFC
SPFMA
/SPFMA
SPLS1
SPFMB
SPWS
SPFSET
25
26
SPFMO0
SCOV
SPLS2
SPOD
1
2
16
18
12
20
11
21
13
19
22
15
14
23
SRRC
SDSS
VAREF
SPFS
GND2
17
10
4
+5V2
GND2
GND2
5
6
+24V3
+24V3
2_DATA1+
2_DATA1-
2_DATA0-
CN6
GND2
/STSET
/STMPS
+24V3
4
2
1
3
179228-4+175694-4
BR
RD
GY
LB
4
3
2
1
B4B-PH-K-S
/STSET
GND2
GND2
/STMPS
+24V3
CN1
TX25-100P-LT-H1
CN3
SCN
JNT
PWB
(1/2)
TX24-100R-LT-H1
SCOV
SPLS2
SPLS1
SDSS
SPPD
SPOD
SOCD
SPED
SPFC
SRRC
OCSW
SPFVR
SPFS
CIS unit
STMP
SPFM
10
8
3
4
5
7
2
11
12
9
1
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