Read Sharp AR-M550 (serv.man14) Service Manual online
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.)
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.)
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.
the arrow direction.
Repeat steps 3 to 6 until the developing roller main pole meets the
positional requirement.
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)
parallelism adjustment)
19 0.5 mm
Click on the first or last page to see other AR-M550 (serv.man14) service manuals if exist.