Sharp MX-M364N / MX-565N (serv.man4) Service Manual ▷ View online
CONTENTS
NOTE FOR SERVICING
1. Precautions for servicing . . . . . . . . . . . . . . . . . . . . . . . . . i
2. Warning for servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . i
3. Note for installing site. . . . . . . . . . . . . . . . . . . . . . . . . . . . i
4. Note for handling PWB and electronic parts . . . . . . . . . .ii
5. Note for repairing/replacing the LSU . . . . . . . . . . . . . . . iii
6. Note for handling the drum unit, the transfer unit,
2. Warning for servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . i
3. Note for installing site. . . . . . . . . . . . . . . . . . . . . . . . . . . . i
4. Note for handling PWB and electronic parts . . . . . . . . . .ii
5. Note for repairing/replacing the LSU . . . . . . . . . . . . . . . iii
6. Note for handling the drum unit, the transfer unit,
the developing unit, and the fusing unit . . . . . . . . . . . . . iii
7. Screw tightening torque . . . . . . . . . . . . . . . . . . . . . . . . . iii
[1]
PRODUCT OUTLINE
1. System configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
2. Machine configuration . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
3. Combination of options . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1. System configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
2. Machine configuration . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
3. Combination of options . . . . . . . . . . . . . . . . . . . . . . . . 1-4
[2]
CONSUMABLE PARTS
1. Supply system table. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2. Maintenance parts list . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
3. Production number identification . . . . . . . . . . . . . . . . . 2-4
1. Supply system table. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2. Maintenance parts list . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
3. Production number identification . . . . . . . . . . . . . . . . . 2-4
[3]
EXTERNAL VIEW AND INTERNAL STRUCTURE
1. Identification of each section and functions . . . . . . . . . 3-1
1. Identification of each section and functions . . . . . . . . . 3-1
[4]
ADJUSTMENTS AND SETTINGS
1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
2. Adjustment item list . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
3. Details of adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
2. Adjustment item list . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
3. Details of adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
[5]
SIMULATION
1. General (Including basic operations) . . . . . . . . . . . . . . 5-1
2. List of simulation codes . . . . . . . . . . . . . . . . . . . . . . . . 5-3
3. Details of simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
1. General (Including basic operations) . . . . . . . . . . . . . . 5-1
2. List of simulation codes . . . . . . . . . . . . . . . . . . . . . . . . 5-3
3. Details of simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
[6]
SELF DIAG AND TROUBLE CODE
1. Self diag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
2. Trouble code list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
3. Details of trouble code . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
4. Paper JAM code . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23
1. Self diag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
2. Trouble code list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
3. Details of trouble code . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
4. Paper JAM code . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23
[7]
FIRMWARE UPDATE
1. Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
2. Update procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
1. Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
2. Update procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
[8]
MAINTENANCE
1. Necessary execution items in maintenance and
1. Necessary execution items in maintenance and
servicing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
2. Contents of the maintenance codes
(Relationship between various counters values and
display messages) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
display messages) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
3. Maintenance list (parts) and details of works . . . . . . . . 8-3
[9]
VARIOUS STORAGE DATA HANDLING
1. HDD/SD card/CF card partition and data contents . . . 9-1
2. Necessary works when replacing the PWB and
1. HDD/SD card/CF card partition and data contents . . . 9-1
2. Necessary works when replacing the PWB and
the HDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
3. Necessary procedure and notes for replacement of the
mirroring kit HDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-8
[10] SERVICE WEB PAGE
1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
2. Details and operation procedures . . . . . . . . . . . . . . . 10-1
2. Details and operation procedures . . . . . . . . . . . . . . . 10-1
[11] SPECIFICATIONS
1. Basic specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1
[12] ELECTRICAL SECTION
1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1
2. Actual wiring chart . . . . . . . . . . . . . . . . . . . . . . . . . . 12-12
3. Signal list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-29
2. Actual wiring chart . . . . . . . . . . . . . . . . . . . . . . . . . . 12-12
3. Signal list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-29
[13] TOOL LIST
1. Exclusive-use tools list. . . . . . . . . . . . . . . . . . . . . . . . 13-1
DETAILS OF EACH SECTION
[A]
EXTERIOR
1. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . .A-1
1. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . .A-1
[B]
OPERATION PANEL
1. Electrical and mechanical relation diagram . . . . . . . . .B-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . .B-2
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . .B-3
1. Electrical and mechanical relation diagram . . . . . . . . .B-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . .B-2
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . .B-3
[C]
DSPF/RSPF SECTION
1. Electrical and mechanical relation diagram . . . . . . . . C-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . C-6
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . C-6
1. Electrical and mechanical relation diagram . . . . . . . . C-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . C-6
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . C-6
[D]
SCANNER SECTION
1. Electrical and mechanical relation diagram . . . . . . . . D-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . D-2
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . D-3
1. Electrical and mechanical relation diagram . . . . . . . . D-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . D-2
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . D-3
[E]
PAPER FEED SECTION
1. Electrical and mechanical relation diagram . . . . . . . . .E-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . .E-3
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . .E-4
1. Electrical and mechanical relation diagram . . . . . . . . .E-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . .E-3
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . .E-4
[F]
PAPER TRANSPORT SECTION
1. Electrical and mechanical relation diagram . . . . . . . . .F-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . .F-2
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . .F-2
1. Electrical and mechanical relation diagram . . . . . . . . .F-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . .F-2
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . .F-2
[G]
LSU SECTION
1. Electrical and mechanical relation diagram . . . . . . . . G-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . G-1
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . G-2
1. Electrical and mechanical relation diagram . . . . . . . . G-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . G-1
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . G-2
[H]
PHOTO-CONDUCTOR SECTION
1. Electrical and mechanical relation diagram . . . . . . . . H-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . H-2
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . H-3
1. Electrical and mechanical relation diagram . . . . . . . . H-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . H-2
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . H-3
[i]
TONER SUPPLY SECTION
1. Electrical and mechanical relation diagram . . . . . . . . . i-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . . i-2
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . . i-2
1. Electrical and mechanical relation diagram . . . . . . . . . i-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . . i-2
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . . i-2
[J]
DEVELOPING SECTION
1. Electrical and mechanical relation diagram . . . . . . . . . J-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . . J-2
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . . J-2
1. Electrical and mechanical relation diagram . . . . . . . . . J-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . . J-2
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . . J-2
[K]
TRANSFER SECTION
1. Electrical and mechanical relation diagram . . . . . . . . .K-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . .K-2
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . .K-2
1. Electrical and mechanical relation diagram . . . . . . . . .K-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . .K-2
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . .K-2
[L]
FUSING SECTION
1. Electrical and mechanical relation diagram . . . . . . . . . L-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . . L-3
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . . L-4
1. Electrical and mechanical relation diagram . . . . . . . . . L-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . . L-3
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . . L-4
[M]
DUPLEX/PAPER EXIT SECTION
1. Electrical and mechanical relation diagram . . . . . . . . M-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . M-3
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . M-3
1. Electrical and mechanical relation diagram . . . . . . . . M-1
2. Operational descriptions . . . . . . . . . . . . . . . . . . . . . . M-3
3. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . M-3
[N]
DRIVE SECTION
1. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . N-1
1. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . N-1
[O]
PWB SECTION
1. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . O-1
1. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . O-1
[P]
FAN SECTION
1. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . .P-1
1. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . .P-1
[Q]
SENSOR/SWITCH SECTION
1. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . Q-1
1. Disassembly and assembly . . . . . . . . . . . . . . . . . . . . Q-1
MX-M565N NOTE FOR SERVICING - i
MX-M503N
Service Manual
NOTE FOR SERVICING
1.
Precautions for servicing
1)
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.
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.
2)
There is a high temperature area inside the machine. Use an
extreme care when servicing.
extreme care when servicing.
It may cause a burn.
3)
There is a high voltage section inside the machine which may
cause an electric shock. Be careful when servicing.
cause an electric shock. Be careful when servicing.
4)
Do not disassemble the laser unit. Do not insert a reflective
material such as a screwdriver in the laser beam path.
material such as a screwdriver in the laser beam path.
It may damage eyes by reflection of laser beams.
5)
When servicing with the machine operating, be careful not to
squeeze you hands by the chain, the belt, the gear, and other
driving sections.
squeeze you hands by the chain, the belt, the gear, and other
driving sections.
6)
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.
inside the machine. It may cause an electric shock, a burn, or
an injury.
7)
When servicing, do not breathe toner, developer, and ink
excessively. Do not get them in the eyes.
excessively. 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.
water immediately, and consult a doctor if necessary.
8)
The machine has got sharp edges inside. Be careful not to
damage fingers when servicing.
damage fingers when servicing.
9)
Do not throw toner or a toner cartridge in a fire. Otherwise,
toner may explode and burn you.
toner may explode and burn you.
10) When replacing the lithium battery on the PWB, used the spec-
ified battery only.
If a battery of different specification is used, the battery may
cause malfunction or breakdown of the machine.
cause malfunction or breakdown of the machine.
11) When carrying a unit with PWB or electronic parts installed on
it, be sure to put it in an anti-static-electricity bag.
It may cause a breakdown or malfunctions.
2.
Warning for servicing
1)
Be sure to connect the power cord only to a power outlet that
meets the specified voltage and current requirements.
meets the specified voltage and current requirements.
Avoid complex wiring, which may lead to a fire or an electric
shock.
shock.
It may cause a fire or an electric shock.
2)
If there is any abnormality such as smoke or an abnormal
smell, interrupt the job and disconnect the power plug.
smell, interrupt the job and disconnect the power plug.
It may cause a fire or an electric shock.
3)
Be sure to connect the grounding wire. If an electric leakage
occurs without grounding, a fire or an electric shock may
result.
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.
grounding must be made.
4)
When connecting the grounding wire, never connect it to the
following points.
following points.
It may cause an explosion, a fire or an electric shock.
* 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
5)
Do not damage, break, or stress the power cord.
Do not put heavy objects on the power cable. Do not forcibly
bend, pull, or strain the power cord.
bend, pull, or strain the power cord.
It may cause a fire or an electric shock.
6)
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.
7)
Do not put a metallic object or a container with water in it inside
the machine.
the machine.
It may cause a fire or an electric shock.
8)
Do not perform servicing, touch the power plug, insert a tele-
phone jack, or operate the machine with wet or only hands.
phone jack, or operate the machine with wet or only hands.
3.
Note for installing site
Do not install the machine at the following sites.
1)
Place of high temperature, high humidity, low tempera-
ture, low humidity, place under an extreme change in tem-
perature and humidity.
ture, low humidity, place under an extreme change in tem-
perature and humidity.
Paper may get damp and form moisture inside the machine,
causing paper jam or copy dirt.
causing paper jam or copy dirt.
For operating and storing conditions, refer to the specifications
described future in the Service Manual.
described future in the Service Manual.
2)
Place of much vibration
It may cause a breakdown.
3)
Poorly ventilated place
An electrostatic type copier will produce ozone inside it.
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 odor of ozone. Install the
machine in a well ventilated place strike, and ventilate occa-
sionally.
as not to affect human bodies. However, continuous use of
such a machine may produce an odor of ozone. Install the
machine in a well ventilated place strike, and ventilate occa-
sionally.
CAUTION
DOUBLE POLE/NEUTRAL FUSING
(200V series only)
MX-M565N NOTE FOR SERVICING - ii
4)
Place of direct sunlight.
Plastic parts and toner may be deformed, discolored, or may
undergo qualitative change.
undergo qualitative change.
It may cause a breakdown or copy quality issues.
5)
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.
may undergo qualitative change due to organic gases such as
ammonium.
Installation of this machine near a diazo-type copier may result
in copy quality issues.
in copy quality issues.
6)
Place of much dust
When dusts enter the machine, it may cause a breakdown or
copy quality issues.
copy quality issues.
7)
Place near a wall
Some machines require intake and exhaust of air.
If intake and exhaust of air are not properly performed, copy
dirt or a breakdown may be result.
dirt or a breakdown may be result.
8)
Unstable or slant surface
If the machine drops or fall down, it may cause an injury or a
breakdown.
breakdown.
If there are optional paper desks and the copier desks speci-
fied, it is recommendable to use them.
fied, it is recommendable to use them.
When using the optional desk, be sure to fix the adjuster and
lock the casters.
lock the casters.
4.
Note for handling PWB and electronic
parts
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.
observe the following precautions in order to prevent against dam-
age by static electricity.
1)
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.
an anti-static case and do not touch them with bare hands.
2)
When and after removing the parts from an anti-static bag
(case), use an earth band as shown below:
(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
procedure on an anti-static mat.
11-13/16"
(30cm)
(30cm)
11-13/16"
(30cm)
(30cm)
17-23/32"
(45cm)
(45cm)
MX-M565N NOTE FOR SERVICING - iii
5.
Note for repairing/replacing the LSU
When repairing or replacing, be sure to observe the following
items.
items.
1)
When repairing or replacing the LSU, be sure to disconnect
the power plug from the power outlet.
the power plug from the power outlet.
2)
When repairing or replacing the LSU, follow the procedures
described in this Service Manual.
described in this Service Manual.
3)
When checking the operations after repairing the LSU, keep all
the parts including the cover installed and perform the opera-
tion check.
the parts including the cover installed and perform the opera-
tion check.
4)
Do not modify the LSU.
5)
When visually checking the inside of the machine for the oper-
ation check, be careful not to allow laser beams to enter the
eyes.
ation check, be careful not to allow laser beams to enter the
eyes.
If the above precaution is neglected or an undesignated work is
performed, safety may not be assured.
performed, safety may not be assured.
6.
Note for handling the drum unit, the
transfer unit, the developing unit, and the
fusing unit
transfer unit, the developing unit, and the
fusing unit
When handling the OPC drum unit, the transfer unit, and the devel-
oping unit, strictly observe the following items.
oping unit, strictly observe the following items.
If these items are neglected, a trouble may be generated in the
copy and print image quality.
copy and print image quality.
(Drum unit)
1)
Avoid working at a place with strong lights.
2)
Do not expose the OPC drum to lights including interior lights
for a long time.
for a long time.
3)
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.)
with light blocking material. (When using paper, use about 10
sheets of paper to cover it.)
4)
Be careful not to attach fingerprints, oil, grease, or other for-
eign material on the OPC drum surface.
eign material on the OPC drum surface.
(Transfer unit)
1)
Be careful not to attach fingerprints, oil, grease, or other for-
eign material on the transfer roller.
eign material on the transfer roller.
(Developing unit)
1)
Be careful not to attach fingerprints, oil, grease, or other for-
eign material on the developing unit.
eign material on the developing unit.
(Fusing unit)
1)
Be careful not to put fingerprints, oil, grease, or other foreign
material on the fusing roller and the external heating belt.
material on the fusing roller and the external heating belt.
2)
Do not leave the fusing roller in contact state for a long time.
7.
Screw tightening torque
The screws used in this machine are largely classified into three
kinds.
kinds.
These kinds are classified according to the shape of the screw
grooves and use positions.
grooves and use positions.
The table below shows the kinds of the screws and the tightening
torques depending on the use position.
torques depending on the use position.
When tightening the screws for repair or maintenance, refer to the
table.
table.
However, for the other conditions of tightening screws than speci-
fied on this table, or when a special care is required, the details are
described on the separate page. Refer to the descriptions on such
a case.
fied on this table, or when a special care is required, the details are
described on the separate page. Refer to the descriptions on such
a case.
NOTE: Especially for the screw fixing positions where there is an
electrode or a current flows, use enough care to tighten
securely to avoid loosening.
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