DOWNLOAD Sharp AR-M550 (serv.man14) Service Manual ↓ Size: 2.46 MB | Pages: 44 in PDF or view online for FREE

Model
AR-M550 (serv.man14)
Pages
44
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2.46 MB
Type
PDF
Document
Service Manual
Brand
Device
Copying Equipment / (7) Settings and adjustments
File
ar-m550-sm14.pdf
Date

Sharp AR-M550 (serv.man14) Service Manual ▷ View online

AR-M550/M620  SETTING AND ADJUSTMENTS  7 - 6
4) Go through the modes specified in Simulation 8-18.
5) Select the number that corresponds to the adjustment item (CRHV
PLUS / CRHV MINUS) using the numeric keypad.  
6) Press the Start key
7) Press the Start key to have the voltage output for 30 seconds. 
The operation can be stopped with the CUSTOM SETTINGS key. 
If the output voltage is not within the requirement, do the following
steps. 
8) Enter the adjustment value using the numeric keypad. 
9) Press the Start key.
(The adjustment value is put into memory, and the corresponding
voltage is output for 30 seconds.) 
Repeat steps 8 to 9 until the output requirement is satisfied.
This adjustment is needed in the following situations: 
• The developing unit has been disassembled. 
• The print density is low. 
• The toner is excessively dispersed.
1) Remove the developing unit of the machine.
2) Remove the developing unit cover and blade cover.
3) Loosen the DV doctor fixing screws.
4) Manually turn the DV roller to align the marking on the DV roller
surface with the DV doctor position.
5) Insert a 0.525mm clearance gauge in between the DV roller and
DV doctor so that the gauge is positioned at a distance of 40 mm to
70 mm from the DV doctor end face.
6) Tighten the DV doctor fixing screws while pressing the DV doctor
in the arrow direction.
(This should be done for both front and rear frames.)
Press [START] key.
Press [CUSTOM SETTINGS] key.
Press [START] key.
Press [CUSTOM SETTINGS] key.
Or after 30sec output.
ADJ 2
Adjusting the developing unit
ADJ 2A
Adjust the developing doctor gap
SIMULATION 8-18
1
TRANSFER CLEANING ROLLER SETTING. SELECT 1-2, AND 
PRESS START.
1.CRHV PLUS    
50
 
2.CRHV MINUS   
50
SIMULATION 8-18
TRANSFER CLEANING ROLLER SETTING. INPUT VALUE, AND 
PRESS START.
1.CRHV PLUS (0-250) 
200
SIMULATION 8-18
TRANSFER CLEANING ROLLER SETTING. EXECUTING···.
1.CRHV PLUS(0-250)
200
AR-M550/M620  SETTING AND ADJUSTMENTS  7 - 7
7) On both sides of the DV doctor and at its center, make sure that
the DV doctor gap is 0.525 ±0.03.
Note: When inserting a clearance gauge, take care not to damage the
DV doctor or MG roller.  
Repeat steps 2 to 6 until the DV doctor gap meets the requirement.
This adjustment is needed in the following situations: 
• The developing unit has been disassembled. 
• The print density is low. 
• The toner is excessively dispersed.
1) Remove the dveloping unit
.
2) Remove the developing unit cover and blade cover, and then place
the developing unit on a level surface. 
3) Attach a piece of string to a sewing needle or pin.
4) With the string in hand, bring the needle closer to the DV roller
while keeping the needle parallel with the roller.  (Do not use a clip,
which does not accurately indicate the position.) 
5) Keeping the needle 2 to 3 mm off the DV roller surface, mark the
DV roller surface at an extension of the needle tip.  (Do not let the
needle tip contact the DV roller.) 
6) Measure the distance between the marking on the DV roller and
leading edge of the DV doctor, and make sure that it is 19±0.5mm.
If this requirement is not met, do the following steps. 
7) Remove the front cover.
8) Loosen the fixing screws of the developing roller main pole adjust-
ing plate, and make adjustments by moving the adjusting plate in
the arrow direction.
Repeat steps 3 to 6 until the developing roller main pole meets the
positional requirement.
This adjustment is needed in the following situations: 
• The LSU has been replaced or removed. 
• Print images are distorted.
This adjustment should be followed by: 
"ADJ 7 / ADJ A: Adjust the print image off-center (print engine section)"
1) Set A4 (11 x 8.5) paper to Tray 1. 
2) Set A3 (11 x 17) paper to Tray 1. 
3) Go through the modes specified in Simulation 64-1.
ADJ 2B
Adjust the developing roller main pole
ADJ 3
Adjusting image distortions
ADJ 3A
Adjust print image distortions (LSU 
parallelism adjustment)
19 0.5 mm
AR-M550/M620  SETTING AND ADJUSTMENTS  7 - 8
 
4) Select PRINT PATTERN using the numeric keypad. 
5) Select print pattern 71 (grid pattern).
6) Press the Start key
7) Select PRINT START using the numeric keypad. 
8) Press the Start key
9) Check the printed grid pattern for distortions. 
Check with one of the following methods. 
[Check Method 1]
Compare the front frame side and rear frame side of the printed paper
in terms of the distance between the outer end of the grid pattern
image and the edge of the paper. 
No adjustment is needed if the difference between these dimen-
sions is within 0.5 mm.
[Check Method 2]
Check the printed grid pattern for distortions. 
If the right-angle level of the traverse print line is 0.5mm or less with
respect to the longitudinal print line of paper, no adjustment is needed.
Carry out the following work if the situation is unsatisfactory.
10) Draw out the manual paper feed tray, and remove the front frame
side, side cover, fan cover cabinet, and fan unit.
11) Remove the fan unit.
12) Loosen the LSU fixing screws, and change the LSU fixing angle. 
• If the vertical line image is inclined to the left with respect to the
front frame side, move the LSU fixing plate in arrow direction (a).
• If the vertical line image is inclined to the right with respect to the
front frame side, move the LSU fixing plate in arrow direction (b).
Select 1, and 
press [START] key.
Select other than 1, and 
press [START] key. 
Press [START] key, or 
press [CUSTOM SETTINGS] key.
SIMULATION 64-1
SELF PRINT MODE. SELECT 0-7, AND PRESS START.
0. TRAY SELECT  :
1
   1. PRINT START
2. PRINT PATTERN:
87
  3. DENSITY   :
1
4. MULTI :       
1
   5. MODE      :
1
6. LEVEL :       
1
   7. DUPLEX    :
1
1
SIMULATION 64-1
SELF PRINT MODE. INPUT VALUE, AND PRESS START.
(PRINT PATTERN)
INPUT 1-98.
71
SIMULATION 64-1
SELF PRINT MODE. INPUT VALUE, AND PRESS START.
(DENSITY)
1-255
100
SIMULATION 64-1
SELF PRINT MODE. INPUT VALUE, AND PRESS START.
(MULTI COUNT)
1-999
1
SIMULATION 64-1
SELF PRINT MODE. SELECT 1-8, AND PRESS START.
(MODE)
1.STANDARD  2.SMOOTHING  3.TONER SAVE  4.HALF TONE
5.SMOOTHING+ TONER SAVE  6.SMOOTHING+ HALF TONE
7.TONER SAVE+ HALF TONE
8.SMOOTHING+ TONER SAVE+ HALF TONE
1
SIMULATION 64-1
SELF PRINT MODE. INPUT VALUE, AND PRESS START.
(LEVEL)
1-5
3
SIMULATION 64-1
SELF PRINT MODE. SELECT 1-5, AND PRESS START.
(FEED TRAY)
  1.TRAY1 2.TRAY2 3.TRAY3 4.TRAY4  5.BPT
1
SIMULATION 64-1
SELF PRINT MODE. SELECT 1-2, AND PRESS START.
(DUPLEX)
  1.NO 2.YES
1
SIMULATION 64-1
SELFT PRINT MODE.. EXECUTING···
0. TRAY SELECT  :
1
2. PRINT PATTERN:
87
  3. DENSITY   :
1
4. MULTI :       
1
   5. MODE      :
1
6. LEVEL :       
1
   7. DUPLEX    :
1
0
(3)
(2)
(4)
(5)
(6)
(0)
(7)
R
F
Ra-Fb<±0.5mm
b
a
AR-M550/M620  SETTING AND ADJUSTMENTS  7 - 9
Repeat steps 6 to 12 until an acceptable result is obtained.
This adjustment is needed in the following situations: 
• The scanner (reading) section has been disassembled. 
• Scanned images are distorted. 
1) Loosen the fixing screws for Scanner Unit A and scanner drive wire
to release the scanner unit from the drive wire.
2) Manually turn the scanner drive pulley, and move Scanner Unit B
until contact with the two stoppers on the CCD mounting plate. 
If Scanner Unit B makes contact with the two stoppers on the CCD
mounting plate simultaneously, the parallelism of Scanner Unit B is
proper.
If this requirement is not met, do the following steps.
3) Loosen the pulley angle fixing screw on either the front or rear
frame side of Scanner Unit B.
4) Adjust the pulley angle position on Scanner Unit B so that the
scanner unit makes contact with both of the two stoppers on the
CCD mounting plate at the same time.
5) Fix the pulley angle on Scanner Unit B.
If the above steps fail to provide an acceptable result, then do the fol-
lowing steps. 
6) Loosen the fixing screw of the scanner unit drive pulley that is not
in contact.
7) Manually turning the scanner unit drive pulley, move Scanner Unit
B until it comes into contact with the two stoppers on the CCD
mounting plate.
ADJ 3B
Adjust the scanner (reading) unit 
parallelism
a
b
Scanner Unit B
Winding pulley
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