AR-6020V ADJUSTMENTS 5 – 1
AR-6020V
Service Manual
[5] ADJUSTMENTS
1. General
Each adjustment item in the adjustment item list is associated with a specific Job number. Perform the adjustment procedures in the sequence
of Job numbers from the smallest to the greatest.
However, there is no need to perform all the adjustment items. Perform only the necessary adjustments according to the need.
Unnecessary adjustments can be omitted. Even in this case, however, the sequence from the smallest to the greatest Job number must be
observed.
If the above precaution should be neglected, the adjustment would not complete normally or trouble may occur.
2. Adjustment item list
3. Details of adjustment
ADJ 1
Process section
1-A
Developing doctor gap adjustment
1) Loosen the developing doctor fixing screw A.
2) Insert a thickness gauge of 1.5mm to the three positions at
20mm and 150mm from the both ends of the developing doc-
tor as shown.
3)
Push the developing doctor in the arrow direction, and tighten
the fixing screws of the developing doctor in the sequence of
13233.
4)
Check the clearance of the developing doctor. If it is within the
specified range, then fix the doctor fixing screw with screw
lock.
* When inserting a thickness gauge, be careful not to scratch
the developing doctor and the MG roller.
1-B
MG roller main pole position adjustment
1)
Remove the DV front cover, and put the developing tank on a
flat surface.
2)
Tie a string to a needle or a pin.
3)
Hold the string and bring the needle close to the MG roller hor-
izontally. (Do not use paper clip, which is too heavy to make a
correct adjustment.) (Put the developing unit horizontally for
this adjustment.)
4)
Do not bring the needle into contact with the MG roller, but
bring it to a position 2 or 3mm apart from the MG roller. Mark
the point on the MG roller which is on the extension line from
the needle tip.
5)
Measure the distance from the marking position to the top of
the doctor plate of the developing unit to insure that it is 18mm.
Job No
Adjustment item list
Simulation
ADJ 1
Process section
1-A
Developing doctor gap adjustment
Developing doctor gap adjustment
1-B
MG roller main pole position adjustment
MG roller main pole position adjust-
ment
1-C
Developing bias voltage adjustment
1-D
Grid bias voltage adjustment
ADJ 2
Mechanism section
2-A
Image position adjustment
(1)
Lead edge image position
adjustment
SIM50-10
(2)
RSPF copy lead edge position
adjustment
SIM50-6
(3)
Rear edge void adjustment
SIM50-1, SIM50-19
(4)
Paper off center adjustment
SIM50-10
(5)
Side edge void area adjust-
ment
SIM26-43
2-B
Main scanning direction (FR direction) distortion balance adjustment
No. 2/3 mirror base unit installing
position adjustment
Copy lamp unit installing position
adjustment
Rail height adjustment
2-C
Scan image (sub scanning direction) distortion adjustment
Winding pulley position adjustment
2-D
Main scanning direction (FR direction) magnification ratio adjustment
SIM 48-1
2-E
Sub scanning direction (scan-
ning direction) magnification
ratio adjustment
(1)
OC mode in copying
SIM 48-1
(2)
RSPF sub scanning direction
magnification ratio
SIM 48-5
2-F
Off center adjustment
(1)
OC mode
SIM 50-12
(2)
RSPF original off-center
adjustment
SIM 50-12
(3)
Mechanical off-center adjust-
ment
---
ADJ 3
Image density
adjustment
3-A
Copy mode image density adjustment
SIM
46-2
20mm
20mm
150mm
A
A
A
DV front cover
2
3
1
