Image Distortion Adjustment - Sharp SF-2314 Service Manual

[7] ADJUSTMENTS
The descriptions of this chapter are divided into the following sec-
tions:
1. Developer section
(1) MG roller main pole position adjustment
(2) Adjustment of clearance between DV doctor and MG roller
2. Optical section
(1) Lens unit angle adjustment
(2) Mirror unit angle/position adjustment

(3) Image distortion adjustment

(4) Copy image center position adjustment
(5) Focus adjustment
(6) Copy magnification ratio adjustment
(7) Uniformity adjustment
(8) Image loss/void area adjustment
3. Copy density adjustment
(1) Copy Density adjustment timing
(2) Note for copy density adjustment
(3) Necessary thing for copy density adjustment
(4) Copy density adjustment mode
(5) Copy density adjustment procedure
(6) Copy density adjustment table
4. Others
(1) Transfer charger wire installation
(2) DV bias adjustment
(3) Separation charger output adjustment
1. Developer section
(1) MG roller main pole position adjustment
If the MG roller main pole position is improper, the following troubles
may occur:
•
Insufficient copy density
•
Toner splash
1
Remove the DV unit from the body and remove the DV cover.
2
3
4
5
DV cover
6
7 – 1
Tie a string to a needle as shown in the figure below.
Hold the string and move the needle to the MG roller.
Mark the point where the needle makes contact with the MG
roller.
Measure the distance between the marking and the developer unit
A
bottom and check that the distance is within 15.1mm. If the
measured distance is outside the range, loosen the MG adjust-
ment plate fixing screw, and move the adjustment plate in the
arrow direction to perform procedures
A
15.1mm
Tighten the MG adjustment plate fixing screw.
Marking
3 5
to again.