DOWNLOAD Sharp MX-M266N / MX-M316N / MX-M356N (serv.man3) Service Manual ↓ Size: 47.11 MB | Pages: 127 in PDF or view online for FREE

Model
MX-M266N MX-M316N MX-M356N (serv.man3)
Pages
127
Size
47.11 MB
Type
PDF
Document
Service Manual
Brand
Device
Copying Equipment / NOTE Service Manual for models with the V suffix.
File
mx-m266n-mx-m316n-mx-m356n-sm3.pdf
Date

Sharp MX-M266N / MX-M316N / MX-M356N (serv.man3) Service Manual ▷ View online

MX-M356NV  ADJUSTMENTS AND SETTINGS  5 – 9
Adjustment Item List
* RSPF original leading edge adjustment (front side)
* RSPF original off-center adjustment (front side)
* RSPF original sub-scan magnification adjustment 
(front side)
8) RSPF adjustment patterns are loaded into the RSPF. 
(Set so that the pattern surface faces down.)
* By pressing the [REPRINT] key, you can return to the cas-
sette  selection  screen  and  have  the  machine  self-print
RSPF adjustment patterns again.
9) Press  the  [EXECUTE]  key,  and  the  machine  starts  loading
RSPF adjustment patterns (for the back side).
* The screen shows a message indicating that the machine is
reading RSPF adjustment patterns (for the back side).
The  machine  starts  calculating  the  adjustment  amount  (for
the back side) after it has read the patterns for the back side.
After  the  machine  has  finished  calculating  the  adjustment
amount  for  the  back  side,  the  next  screen  appears  where
you can view the results of the adjustments.
Adjustment Item List
* RSPF original leading edge adjustment (back side)
* RSPF original off-center adjustment (back side)
* RSPF original sub-scan magnification adjustment 
(back side)
10) The adjustment result screen appears.
This screen shows the current values along with the previous
values in parentheses.
* By pressing the [REPRINT] key, you can return to the cas-
sette  selection  screen  and  have  the  machine  self-print
RSPF  adjustment  patterns  (for  the  front  and  back  sides)
again.
* To have the machine start re-reading the RSPF adjustment
patterns (front and back sides), press the [RESCAN] key.
* To return to the top menu without saving the adjustment val-
ues into EEPROM and RAM, press the [RETRY] key.
* To  display  the  data  used  for  adjustment,  press  the  [DATA]
key.
11) To  save  the  adjustment  values  into  EEPROM  and  RAM  and
return to the top menu, press the [OK] key.
* To return to the result screen, press the [BACK] key.
 
ADJ 4
Scan image distortion 
adjustment 
(Document table mode)
This adjustment must be performed in the following cases:
* When the scanner (reading) section is disassembled.
* When the copy image is distorted.
 
4-A
Scanner (reading) unit parallelism 
adjustment
Before  execution  of  this  adjustment,  remove  the  document  table
glass.
1)
Remove the lamp unit, and then loosen the screws which are
fixing the scanner unit A and the drive wire. Release the scan-
ner unit A from the drive wire.
2)
Turn the scanner drive pulley manually and shift the scanner
unit B to bring it into contact with the stopper.
When the scanner unit B is in contact with the two stoppers on
the front and the rear frames simultaneously, the parallelism is
proper.
If this requirement is not met, do the following steps.
MX-M356NV  ADJUSTMENTS AND SETTINGS  5 – 10
3) Loosen the fixing screw of the pulley angle on the front frame
side of the scanner unit B.
4) Adjust the position of the pulley angle on the front frame side
of the scanner unit B so that it is in contact with two stoppers
on the front and the rear frames simultaneously.
5) Fix the pulley angle on the front frame side of the scanner unit
B.
If  a  satisfactory  result  is  not  obtained  from  the  above  proce-
dures, perform the following procedures.
Loosen the fixing screw of the scanner unit drive pulley which
is not in contact.
Without moving the scanner unit drive shaft, turn the scanner
unit drive pulley manually and adjust so that the scanner unit B
is in contact with both stoppers on the front frame and the rear
frame  simultaneously.  (Change  the  relative  position  of  the
scanner unit drive pulley and the drive shaft.) Fix the scanner
unit drive pulley fixing screw.
6)
With  the  scanner  unit  B  in  contact  with  both  stoppers,  fit  the
edge of the scanner unit A with the right edge of the frame, and
fix the scanner unit A with the fixing screw.
 
4-B
Scan image (sub scanning direction) 
distortion adjustment
1)
Make  a  test  chart  on  A3  (11"  x  17")  paper  as  shown  below.
(Draw a rectangular with four right angles.)
2)
Set  the  test  chart  prepared  in  the  procedure  1)  on  the  docu-
ment table. (Shift the test chart edge 30mm from the reference
position  as  shown  below.)  With  the  document  cover  open,
make a copy on A3 (11" x 17") paper.
L
L
L = 10mm
L
L
30mm
MX-M356NV  ADJUSTMENTS AND SETTINGS  5 – 11
3) Check for distortion in the sub scanning direction.
If La = Lb, there is no distortion.
If there is any distortion in the sub scanning direction, perform
the following procedures.
4) Loosen either one of the fixing screws of the scanner unit drive
pulley. (Either one on the front frame or on the rear frame will
do.)
5) Without moving the scanner unit drive shaft, manually turn the
scanner unit drive pulley to change the parallelism of the scan-
ner unit A and B. (Change the relative position of the scanner
unit drive pulley and the drive shaft.)
6) Tighten the scanner unit drive pulley fixing screw.
Repeat the procedures 2) - 6) until the condition of the procedure 3)
is satisfied.
If the distortion in the sub scanning direction cannot be deleted with
the above procedures, perform ADJ 4A Scanner (reading) unit par-
allelism adjustment.
 
4-C
Scan image (main scanning direction) 
distortion adjustment
1)
Make  a  test  chart  on  A3  (11"  x  17")  paper  as  shown  below.
(Draw a rectangular with four right angles.)
2)
Set  the  test  chart  prepared  in  the  procedure  1)  on  the  docu-
ment table, and make a copy on A3 (11" x 17") paper.
3)
Check for distortion in the main scanning direction.
If the four angles of the rectangle of the copy image are right
angles,  it  is  judged  that  there  is  no  distortion.  (The  work  is
completed.)
If there is any distortion in the main scanning direction, perform
the following procedure.
4)
Check  the  difference  (distortion  balance)  between  left-hand
and right-hand side images distortions.
If Lc = Ld, the distortion on the left is equal to that on the right.
(The distortions are balanced.)
If the above condition is satisfied, go to the procedure 6).
If not, perform the following procedures.
La
Lb
L
L
L = 10mm
L
L
Lc
Ld
Copy A
Lc
Ld
Copy B
There is no difference
between the distortion on
the right and that on the left.
Lc     Ld
Lc     Ld
There is some difference
between the distortion on
the right and that on the left.
MX-M356NV  ADJUSTMENTS AND SETTINGS  5 – 12
5) Change  the  height  balance  of  the  scanner  rail  on  the  front
frame side.
Remove the lower cabinet of the operation panel. Loosen the
scanner  rail  fixing  screw  to  change  the  balance  between  the
right and the left heights of the scanner rail.
Repeat the procedures 2) - 5) until the difference between the
image distortions (distortion balance) is deleted.
6) Without changing the balance of the scanner rail on the front
frame side, change the overall height.
7) Set  the  test  chart  prepared  in  the  procedure  1)  on  the  docu-
ment table, and make a copy on A3 (11" x 17") paper. Check
that the distortion in the main scanning direction is within the
specified range.
Repeat the procedures 6) and 7) until the distortion in the main
scanning direction is in the specified range.
 
ADJ 5
Scanner image skew 
adjustment (RSPF mode)
This adjustment must be performed in the following cases:
* The RSPF section has been disassembled.
* When replacing the RSPF unit.
* The RSPF unit generates skewed scanned images.
1) Create an adjustment chart by printing in duplex mode the self-
print pattern (grid pattern) specified in Simulation 64-2.
SIM 64-2 set values
A = 1, B = 1, C = 254, D = 255
Make sure that the print grid pattern is almost in parallel with
the  paper  edges,  and  apply  position  marks  A  and  B  to  the
leading and trailing edges of the paper surface lead edge sec-
tion.
2)
Copy the adjustment chart (created in step 1) to A3 (11" x 17")
paper  in  RSPF  duplex  mode,  and  then  check  the  image  for
skews  (Set  in  the  RSPF  feed  tray  so  that  the  mark  on  the
adjustment chart is at the edge). 
? Check with one of the following methods.
Check Method 1
Check Method 2
Check  that  the  squareness  of  the  main  scanning  direction
print  line  for  the  longitudinal  direction  of  paper  is  within
1.0mm.
If the copy image is not in the above state, perform the pro-
cedure 3).
3)
Open the RSPF unit, and loosen the fixing screw of the hinge.
4)
Slide  the  RSPF  unit  in  the  arrow  direction  to  make  the  skew
adjustment.
5)
Make a copy again and measure (a) and (b) on the copied test
chart. Repeat procedures 2) to 5) until the condition ((a) - (b) =
A
B
Paper pass direction
A
B
a
b
(Front side)
Make sure that the output satisfies the condition: |a-b| ± 1 mm
A
0 - 1.0mm
Page of 127
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