Sharp MX-M350N / MX-M350U / MX-M450N / MX-M450U (serv.man5) Service Manual ▷ View online
MX-M350/M450 N/U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 51
a. Scanner unit
a-1. OC
1) Remove the OC cover.
a-2. Dust-proof glass
a-3. Table glass
a-4. White reference glass
1) Remove the table glass holder and the white reference glass
holder, and remove the table glass and the white reference
glass.
glass.
a-5. Mirror
1) Remove the table glass.
2) Clean mirror.
a-6. Rails
1) Remove the table glass.
2) Grease up the rails.
a-7. Drive wire
a-8. Pulley
a-9. Drive belt
1) Remove the table glass.
2) Check the drive wire, pulley and drive belt.
a-10. Scan motor
1) Remove the scanner rear cabinet and the rear lower cabinet.
1)
1)
2)
3)
4)
3)
1)
2)
1)
3)
4)
4)
5)
6)
1)
1)
2)
3)
3)
4)
MX-M350/M450 N/U 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)
MX-M350/M450 N/U 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: Only the 2 screws marked in red may be used to remove
the CCD. Do not touch any others as they are set in the
factory. Failure to follow this warning will result in damaged
components and the whole assembly needs to be replaced.
components and the whole assembly needs to be replaced.
1)
1)
1)
1)
1)
2)
2)
3)
1)
MX-M350/M450 N/U 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 (MX-EFX1) 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
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