MX-6500N, MX-7500N (serv.man14). Note for Servicing — Sharp Copying Equipment Service Manual (repair manual)

Model
MX-6500N MX-7500N (serv.man14)
Pages
3 Few pages! See other manuals at the bottom of the first or last page.
Size
288.72 KB
Type
PDF
Document
Service Manual
Brand
Device
Copying Equipment / Note for Servicing
File
mx-6500n-mx-7500n-sm14.pdf
Date

View Sharp MX-6500N / MX-7500N (serv.man14) Service Manual online

MX-7500N  NOTE FOR SERVICING - i
MX-7500N
Service Manual
 
NOTE FOR SERVICING
1.
Precautions for servicing
-  When servicing, disconnect the power plug, the printer cable, the
network cable, and the telephone line from the machine, except
when performing the communication test, etc.
It may cause an injury or an electric shock.
-  There is a high temperature area inside the machine. Use
extreme care when servicing.
It may cause a burn.
-  There is a high voltage section inside the machine which may
cause an electric shock. Be careful when servicing.
-  Do not disassemble the laser unit. Do not insert a reflective mate-
rial such as a screwdriver in the laser beam path.
It may damage eyes by reflection of laser beams.
-  When servicing with the machine operating, be careful not to
squeeze you hands by the chain, the belt, the gear, and other
driving sections.
-  Do not leave the machine with the cabinet disassembled.
Do not allow any person other than a serviceman to touch inside
the machine. It may cause an electric shock, a burn, or an injury.
-  When servicing, do not breathe toner, developer, and ink exces-
sively. Do not get them in the eyes.
If toner, developer, or ink enters your eyes, wash it away with
water immediately, and consult a doctor if necessary.
-  The machine has got sharp edges inside. Be careful not to dam-
age fingers when servicing.
-  Do not throw toner or a toner cartridge in a fire. Otherwise, toner
may ignite and burn you.
-  When replacing a lithium battery on a PWB, only use the speci-
fied replacement battery.
If a battery of different specification is used, it may cause a
machine malfunction or breakdown.
-  When carrying a unit with PWB or electronic parts installed to it,
be sure to put it in an anti-static-electricity bag.
It may otherwise cause a machine breakdown or malfunction.
2.
Warning for servicing
-  Be sure to connect the power cord only to a power outlet that
meets the specified voltage and current requirements.
Avoid complex wiring, which may lead to a fire or an electric
shock.
It may cause a fire or an electric shock.
-  If there is any abnormality such as a smoke or an abnormal
smell, interrupt the job and disconnect the power plug.
It may cause a fire or an electric shock.
-  Be sure to connect the grounding wire. If an electric leakage
occurs without grounding, a fire or an electric shock may result.
To protect the machine and the power unit from lightening,
grounding must be made.
-  When connecting the grounding wire, never connect it to the fol-
lowing points.
- Gas tube
- Lightning conductor
- A water pipe or a water faucet, which is not recognized as a
grounding object by the authorities.
- Grounding wire for telephone line
It may cause an explosion, a fire or an electric shock.
-  Do not damage, break, or stress the power cord.
Do not put heavy objects on the power cable. Do not stress, forc-
ibly bend, or pull the power cord.
It may cause a fire or an electric shock.
-  Keep the power cable away from a heat source.
Do not insert the power plug with dust on it into a power outlet.
It may cause a fire or an electric shock.
-  Do not place liquids or foreign metallic objects inside the
machine.
It may cause a fire or an electric shock.
-  Do not touch the power cord, insert the phone jack, operate the
machine, or perform service on the machine with wet or oily
hands.
It may cause an electric shock.
3.
Note for installing site
Do not install the machine at the following sites.
-  Place of high temperature, high humidity, low temperature,
low humidity, place under an extreme change in temperature
and humidity.
Paper may get damp and form condensation inside the machine,
causing paper jam or copy dirt.
For operating and storing conditions, refer to the specifications
described later.
-  Place of extreme vibrations
It may cause a breakdown.
-  Poorly ventilated place
An electrostatic type copier will produce ozone.
The quantity of ozone produced is designed to a low level so as
not to affect human bodies. However, continuous use of such a
machine may produce an ozone smell. Install the machine in a
well ventilated place.
CAUTION
DOUBLE POLE/NEUTRAL FUSING
(200V series only)
MX-7500N  NOTE FOR SERVICING - ii
-  Place of direct sunlight.
Plastic parts and ink may be deformed, discolored, or may
undergo qualitative change.
It may cause a breakdown or output quality problems.
-  Place which is full of organic gases such as ammonium
The organic photo-conductor (OPC) drum used in the machine
may undergo qualitative change due to organic gases such as
ammonium.
Installation of this machine near a diazo-type copier and blue
print machine may result in poor quality output.
* There was a trouble in a place where silicon-series gas or vol-
atile components are generated. Use great care for avoiding
this.
-  Place of much dust
When dust or contaminants enters the machine, it may cause a
breakdown or poor quality output.
-  Place near a wall
The machine will require ventilation.
If ventilation is not proper, poor output or machine failure may
result.
-  Unstable or irregular surface
If the machine is dropped or tips over, it may cause injury or
machine malfunction.
4.
Note for handling PWB and electronic 
parts
When handling the PWB and the electronic parts, be sure to
observe the following precautions in order to prevent against dam-
age by static electricity.
-  When in transit or storing, put the parts in an anti-static bag or an
anti-static case and do not touch them with bare hands.
-  When and after removing the parts from an anti-static bag (case),
use an earth band as shown below:
-  Put an earth band to your arm, and connect it to the machine.
-  When repairing or replacing an electronic part, perform the pro-
cedure on an anti-static mat.
11-13/16" 
(30cm)
11-13/16" 
(30cm)
17-23/32" 
(45cm)
MX-7500N  NOTE FOR SERVICING - iii
5.
Note for repairing/replacing the LSU
When repairing or replacing, be sure to observe the following
items.
-  When repairing or replacing the LSU, be sure to disconnect the
power plug from the power outlet.
-  When repairing or replacing the LSU, follow the procedures
described in this Service Manual.
-  When checking the operations after repairing the LSU, keep all
the parts including the cover installed and perform the operation
check.
-  Do not modify the LSU.
-  When visually checking the inside of the machine for the opera-
tion check, be careful not to allow laser beams to enter the eyes.
If the above precaution is neglected or the LSU is modified, ones
safety may be at risk.
6.
Note for handling the drum unit, the 
transfer unit, the developing unit
When handling the OPC drum unit, the transfer unit, and the devel-
oping unit, strictly observe the following items.
If these items are neglected, a problem may be generated in the
copy and print image quality.
Drum unit
-  Avoid working at a place with strong lights.
-  Do not expose the OPC drum to lights including interior lights for
a long time.
-  When the OPC drum is removed from the machine, cover it with
light blocking material. (When using paper, use about 10 sheets
of paper to cover it.)
-  Be careful not to attach fingerprints, oil, grease, or other foreign
material on the OPC drum surface.
Transfer unit
-  Be careful not to leave fingerprints, oil, grease, or other foreign
material on the transfer roller, primary transfer belt, and the sec-
ondary transfer belt.
Developing unit
-  Be careful not to leave fingerprints, oil, grease, or other foreign
material on the developing unit.
Fusing unit
-  Be careful not to attach finger prints or foreign materials on the
fusing belt and the pressure roller.
7.
Screw tightening torque
The screws used in this machine are largely classified into three
types.
These types are classified according to the shape of the screw
grooves and use positions.
The table below shows the types of the screws and the tightening
torques depending on the use position.
When tightening the screws for repair or maintenance, refer to the
table.
However, for the other conditions of tightening screws than speci-
fied on this table, or under special circumstances, the details are
described on the separate page. Refer to the descriptions on such
an exception.
Especially for the screw fixing positions where there is an electrode
or a current flows, use enough care to tighten securely to avoid
loosening.
Screw kinds and tightening torques
Normal screws, set screws (including step screws)
Tapping screws (for iron)
Tapping screw (for plastic)
Screw 
diameter
Material to be 
fixed
Tightening 
torque 
(N
m)
Tightening 
torque 
(kgf
cm)
Tightening 
torque 
(lbft)
M2.6
Steel plate
0.8 - 1.0
8 - 10
0.6 - 0.7
M3
Steel plate
1.0 - 1.2
10 - 12
0.7 - 0.9
M4
Steel plate
1.6 - 1.8
16 - 18
1.2 - 1.3
Screw 
diameter
Material to be 
fixed
Tightening 
torque 
(N
m)
Tightening 
torque 
(kgf
cm)
Tightening 
torque 
(lbft)
M3
Steel plate 
(Plate thickness 
0.8mm or above)
1.0 - 1.2
10 - 12
0.7 - 0.9
M4
Steel plate 
(Plate thickness 
0.8mm or above)
1.6 - 1.8
16 - 18
1.2 - 1.3
M3
Steel plate 
(Plate thickness 
less than 0.8mm)
0.6 - 0.8
6 - 8
0.4 - 0.6
M4
Steel plate 
(Plate thickness 
less than 0.8mm)
1.2 - 1.4
12 - 14
0.9 - 1.0
Screw 
diameter
Material to be 
fixed
Tightening 
torque 
(N
m)
Tightening 
torque 
(kgf
cm)
Tightening 
torque 
(lbft)
M3
Plastic resin
0.6 - 0.8
6 - 8
0.4 - 0.6
M4
Plastic resin
1.0 - 1.2
10 - 12
0.7 - 0.9
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Download Sharp MX-6500N / MX-7500N (serv.man14) Service Manual (Repair Manual)

Here you can view online or download Sharp MX-6500N / MX-7500N (serv.man14) Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sharp MX-6500N / MX-7500N (serv.man14) Copying Equipment. Information contained in Sharp MX-6500N / MX-7500N (serv.man14) service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).