Sharp MX-6500N / MX-7500N (serv.man23) Service Manual ▷ View online
MX-7500N MAINTENANCE 9 – 7
Transfer
section
section
Primary
transfer unit
transfer unit
1
Primary transfer belt
-
When replacing, apply KYNAR
powder or CKOG-0345DS51(Y
toner).
powder or CKOG-0345DS51(Y
toner).
2
Primary transfer cleaner
blade
blade
-
When 300K is reached, replace
together with the primary transfer
belt.
together with the primary transfer
belt.
3
Primary transfer roller
-
X
Replace as needed.
4
Primary transfer belt
drive gear
drive gear
-
X
Replace as needed.
5
Primary transfer belt
drive roller
drive roller
-
O
Clean with alcohol.
6
Primary transfer belt
follower roller
follower roller
-
O
Clean with alcohol.
7
Primary transfer belt
tension roller
tension roller
-
O
Clean with alcohol.
8
Primary transfer idle
roller
roller
-
O
Clean with alcohol.
9
PTC opposed roller
-
O
Clean with alcohol.
10
Registration backup roller
-
O
Clean with alcohol.
11
Transfer separation pawl
-
Replace together with the primary
transfer belt.
transfer belt.
12
Y auxiliary roller
-
O
Clean with alcohol.
13
Primary transfer cleaner
seals F/R
seals F/R
-
X
Replace as needed.
14
Primary transfer toner
reception seal
reception seal
-
X
Replace as needed.
15
Sensors
X
X
For the reflection-type sensor, the
other side must be also cleaned.
other side must be also cleaned.
16
Primary transfer unit
Replace every 3000K.
Transfer
section
section
PTC unit
16
Charger wire
-
Do not touch the wire with bare
hand.
hand.
17
PTC cleaner
-
18
PTC cleaner B
-
Registration
sensor unit
sensor unit
19
Image registration/
density sensor
density sensor
-
O
20
Sensors
X
X
For the reflection-type sensor, the
other side must be also cleaned.
other side must be also cleaned.
Secondary
transfer unit
transfer unit
21
Secondary transfer belt
-
Never use alcohol or solvents for
cleaning.
When replacing apply CKOG-
0345DS51(Y toner)
cleaning.
When replacing apply CKOG-
0345DS51(Y toner)
22
Secondary transfer
cleaner blade
cleaner blade
-
When 300K is reached, replace
together with the secondary transfer
belt.
together with the secondary transfer
belt.
23
Secondary transfer roller
-
X
Replace as needed.
24
Secondary transfer idle
gear
gear
-
X
Replace as needed.
25
Secondary transfer belt
drive roller
drive roller
-
O
Clean with alcohol.
26
Secondary transfer belt
follower roller
follower roller
-
O
Clean with alcohol.
27
Secondary transfer blade
contact roller
contact roller
-
O
Clean with alcohol.
28
Secondary transfer
backup roller
backup roller
-
O
Clean with alcohol.
29
Secondary transfer
cleaning brush roller
cleaning brush roller
-
O
30
Secondary transfer
cleaner seals F/R
cleaner seals F/R
-
X
Replace as needed.
31
Secondary transfer toner
reception seal
reception seal
-
X
Replace as needed.
32
Secondary transfer
cleaning roller
cleaning roller
-
When 300K is reached, replace
together with the secondary transfer
belt.
together with the secondary transfer
belt.
33
Secondary transfer unit
Replace every 3000K.
Section
Unit
No.
Maintenance parts
When
calling
200K
300K
400K
600K
2000K
3000K
Remark
MX-7500N MAINTENANCE 9 – 8
Waste toner collection
section
section
1
Waste toner box
X
X
Replacement reference: 100K under
the standard environmental
conditions (20 - 25degrees C 65 +/-
5%) at the color ratio of "7 : 3 (Black
: Color)" in the print ratio 5%
document mode.
the standard environmental
conditions (20 - 25degrees C 65 +/-
5%) at the color ratio of "7 : 3 (Black
: Color)" in the print ratio 5%
document mode.
2
Sensors
X
X
For the reflection-type sensor, the
other side must be also cleaned.
other side must be also cleaned.
3
Gear
X
X
4
Bearing
X
X
Fusing
section
section
Fusing unit
1
Fusing belt
-
2
Fusing roller
-
When replacing, apply grease
(UKOG-0235FCZZ) to the shaft
section.
(UKOG-0235FCZZ) to the shaft
section.
3
Pressure roller
-
When replacing, apply grease
(UKOG-0235FCZZ) to the shaft
section.
(UKOG-0235FCZZ) to the shaft
section.
4
Separation plate
-
Clean when a foreign material is
attached.
attached.
5
Lower separation pawl
-
Clean when a foreign material is
attached.
attached.
6
Meandering suppress
collar
collar
-
7
Heating roller
-
8
Fusing roller bearing
-
9
Heating roller bearing
-
10
Pressure roller bearing
-
11
Heat-insulating bush
-
12
Pressure roller gear
-
13
24T Gear
-
Including the pressure roller kit.
14
Main thermistor
X
X
15
Sub thermistor 1
X
X
16
Sub thermistor 2
X
X
Replace or clean with alcohol as
needed.
needed.
17
Lower thermistor 1
X
X
18
Lower thermistor 2
X
X
Replace or clean with alcohol as
needed.
needed.
19
Transport roller 18
X
O
20
Gears
Apply to the specified position.
21
Web roller
-
22
Web guide shaft
-
23
Web pressure roller
-
24
Web pressure roller
bearing
bearing
-
25
Fusing paper exit
detector
detector
-
X
26
Fusing front paper pass
detector
detector
-
X
For the reflection-type sensor, the
other side must be also cleaned.
other side must be also cleaned.
27
Sensors
X
X
For the reflection-type sensor, the
other side must be also cleaned.
other side must be also cleaned.
-
Paper guides
O
O
-
Fusing unit
-
Replace at 300K when replacing the
unit.
unit.
-
Web cleaning motor
-
Replace at 300K when replacing the
unit.(Including the unit exchange)
unit.(Including the unit exchange)
Paper
exit/
reverse
section
exit/
reverse
section
Right door
unit
unit
1
Transport roller 19
X
O
X
2
Transport roller 20
X
O
X
3
Transport roller 21
X
O
X
4
Transport roller 22
X
O
X
5
Paper exit roller 2
X
O
X
-
Follower roller
X
O
X
6
Discharge brush
X
X
7
Sensors
X
X
For the reflection-type sensor, the
other side must be also cleaned.
other side must be also cleaned.
-
ADU reverse gate
X
O
X
-
Transport paper guides
O
O
Paper exit
unit
unit
8
Paper exit roller 1
X
O
X
-
Follower roller
X
O
X
9
Discharge brush
X
X
10
Sensors
X
X
For the reflection-type sensor, the
other side must be also cleaned.
other side must be also cleaned.
-
Transport paper guides
O
O
Section
Unit
No.
Maintenance parts
When
calling
200K
300K
400K
600K
2000K
3000K
Remark
MX-7500N MAINTENANCE 9 – 9
Drive
section
section
Tandem
paper feed
drive unit
paper feed
drive unit
1
Gears
-
X
Apply to the specified position as
needed when checking.
needed when checking.
2
Belts
-
X
Vertical transport clutch
upper (PTRC2)
upper (PTRC2)
-
X
Paper feed clutch
(T1PUC)
(T1PUC)
-
X
Paper feed clutch
(T2PUC)
(T2PUC)
-
X
Paper transport clutch
(TTRC)
(TTRC)
-
X
Paper feed
drive unit
drive unit
3
Gears
-
X
Apply to the specified position as
needed when checking.
needed when checking.
4
Belts
-
X
Paper feed clutch
(C3PUC)
(C3PUC)
-
X
Paper feed clutch
(C4PUC)
(C4PUC)
-
X
Vertical transport clutch
lower (PTRC1)
lower (PTRC1)
-
X
Transport
drive unit
drive unit
5
Gears
-
X
Apply to the specified position as
needed when checking.
needed when checking.
6
Belts
-
X
Paper feed clutch
(MPUC)
(MPUC)
-
X
Main drive
unit (BK)
unit (BK)
7
Gears
-
X
Apply to the specified position as
needed when checking.
needed when checking.
8
Shaft earth sections
-
X
Apply to the specified position as
needed when checking.
needed when checking.
9
Belts
-
X
10
Sensors
-
X
For the reflection-type sensor, the
other side must be also cleaned.
other side must be also cleaned.
DV clutch
-
X
Main drive
unit (CL)
unit (CL)
11
Gears
-
X
Apply to the specified position as
needed when checking.
needed when checking.
12
Shaft earth sections
-
X
Apply to the specified position as
needed when checking.
needed when checking.
13
Sensors
-
X
For the reflection-type sensor, the
other side must be also cleaned.
other side must be also cleaned.
DV clutch
-
X
Other
14
Fusing motor
-
X
Replace at the specified number of
rotations: about 2,300K.
rotations: about 2,300K.
Filter section
1
Deodorant filter
X
2
Toner filter
X
3
Ozone filter
X
Section
Unit
No.
Maintenance parts
When
calling
200K
300K
400K
600K
2000K
3000K
Remark
MX-7500N MAINTENANCE 9 – 10
Memo:
Note for cleaning the image registration/density sensor
When in maintenance or in case of a service call, refer to "Criteria for necessity of cleaning" below to judge the necessity of cleaning the image
registration/density sensor. If it is judged that cleaning is necessary, then perform cleaning.
registration/density sensor. If it is judged that cleaning is necessary, then perform cleaning.
Criteria for necessity of cleaning
- The SIM44-2 “D” - “F”, “pcs_*_LED ADJ value” is increased by aging or dirt of the image density sensor.
- When the image density is decreased, execute Sim44-2.
Then execute SIM46-74”Copy color balance adjustment (Auto adjustment)/Printer color balance adjustment””.
Greasing
Greasing is not always required for every maintenance. In the following cases, check and grease.
- When there are some noises.
- When a lot of jams occur frequently. (Check the jam history.)
Cleaning of sensors and detectors in the paper feed/transport system
Cleaning of sensors and detectors in the paper feed/transport system is not always required for every maintenance. In the following cases,
check and clean.
check and clean.
- When a trouble or a jam occurs due to a sensor or a detector. (Check the jam history.)
Torque limiter check and replacement
Torque limiter check and replacement is not always required for every maintenance. In the following cases, check and replace.
- When there are some noises.
- When a lot of jams occur frequently. (Check the jam history.)
Alcohol for cleaning
Be sure to use ethanol for cleaning.
Cleaning of the primary transfer mode detector (CL/BK)
- When replacing the OPC drum, remove the primary transfer unit and the developing unit, and clean them.
- Blow air to the light emitting section and light receiving section to remove the attached toner.
- Blow air also when the sensor is wiped and cleaned with waste cloth.
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