AR-C270 (serv.man8). (Section 7) Settings Adjustments M1-M7 - Sharp Copying Equipment Service Manual (repair manual). Page 2

JOB No

ADJUSTMENT ITEM

SIMULATION

ADJ M17 Copy quality adjustment

ADJ 6

Black toner component image gamma adjustment (Black
character and black line reproduction adjustment)
(AR-C250/C160/C270) (Normally unnecessary to adjust.)

46-27

ADJ 7

Copy color balance adjustment (Single color Copy
mode)  (Normally unnecessary to adjust.)
(AR-C250/C160/C270)

46-25

ADJ 8

Setup of the gamma characteristic in the color copy
mode (AR-C250/C160/C270)

26-55

ADJ 9

Fusing capability setting with heavy paper (AR-C150)

26-55

ADJ 10 User auto color calibration (Copy color balance, auto

density adjustment)

26-53

ADJ M18 Document size sensor adjustment

ADJ 1

Original size sensor detection point adjustment

41-2

ADJ 2

Original size sensor sensitivity adjustment

41-2

ADJ M19 Waste toner full detection level adjustment

ADJ M20 Touch panel coordinates setting

65-1

ADJ M21  Transfer belt level adjustment

(Transfer belt traveling adjustment)

ADJ M22  Fusing pressure adjustment

ADJ M23 Power voltage adjustment

(AR-C100/C150/C250/C270)

ADJ 1

3.4 V power voltage adjustment

ADJ 2

5.0 V power voltage adjustment

ADJ 3

24 V power voltage adjustment

ADJ M24 Manual feed paper size sensor adjustment

40-2

ADJ M25 OHP sensor adjustment

40-5

∗

 1/

∗

 2/

∗

 3: ADJ M9A automatically performs the adjustment contents of ADJ M9/ADJ M10. If satisfactory results are obtained by ADJ M9A, there is

no need to execute manual adjustments of ADJ M9/ADJ M10.

∗

 4/

∗

 5:

ADJ M17/ADJ 2 automatically perform the adjustment contents of ADJ M17/ADJ 3. If satisfactory results are obtained by ADJ M17/ADJ 2,
there is no need to execute manual adjustments of ADJ M17/ADJ 3.

This adjustment must be performed in the following cases:

•

When the developing unit is disassembled.

•

When the print density is low.

•

When there is a lot of toner dispersion abnormally.

1) Remove the developing unit from the copier, and remove the de-

veloping unit cover and the blade cover.

2) Loosen the DV doctor fixing screw A.

3) Insert a 0.525 thickness gauge at the point of 40mm –  70mm from

the DV doctor edge.

4) Push the DV doctor in the arrow direction and tighten the DV doc-

tor fixing screw.
(Perform the same procedure for the front and the rear frame si-
multaneously.)

5) Check that the clearance is 0.525 

±

 0.03mm at two positions

which are 40mm –  70mm from the both sides of the DV doctor.

∗

When inserting the thickness gauge, be careful not to scratch the
DV doctor and the MG roller.

This adjustment must be performed in the following cases:

•

When the developing unit is disassembled.

•

When the print density is low.

•

When there is a lot of toner dispersion abnormally.

1) Remove the developing unit cover and the blade cover, and place

the developing unit on a flat surface.

2) Tie a string to a needle or a pin.

3) Hold the string and put the needle horizontally and move it  toward

the MG roller. (Do not use a clip which is too big to have a correct
position.)

4) With the needle tip at 2 –  3mm from the MG roller surface, mark

the point on the surface which is on the extended line of the nee-
dle tip. (Do not make contact between the needle tip and the MG
roller.)

40mm

30mm

40mm

30mm

7 –  2