Sharp MX-6500N / MX-7500N (serv.man23) Service Manual ▷ View online
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.
MX-7500N MAINTENANCE 9 – 11
A. DSPF section
X: Check (Clean, replace, or adjust according to necessity.)
O: Clean
: Replace
: Adjust
: Lubricate
Unit
No.
Maintenance parts
When
calling
Every
200K
Every
300K
Every
400K
Every
600K
Every
1500K
Remark
Document feed
tray unit
tray unit
1
Sensors
X
X
For the reflection-type sensor, the other side
must be also cleaned.
must be also cleaned.
Document feed
unit
unit
2
Document pickup roller
O
O
Replace according to each paper feed counter
value: Replace at 100K or after one-year use.
value: Replace at 100K or after one-year use.
3
Paper feed roller
O
O
4
Sensors
X
X
For the reflection-type sensor, the other side
must be also cleaned.
must be also cleaned.
Lamp unit
5
Second scan section,
scanning glass
scanning glass
O
O
6
Reflector
O
O
7
Scanner lamp
O
O
Air-blow the LED section.
Optical unit
8
Mirror
O
O
9
Lens
O
O
10
CCD
O
O
DSPF unit
11
Separation roller
O
O
Replace according to each paper feed counter
value: Replace at 100K or after one-year use.
value: Replace at 100K or after one-year use.
12
Torque limiter
X
X
Replace according to each paper feed counter
value: 800K
value: 800K
13
No. 1 registration roller
O
O
14
Transport roller 1
O
O
15
No. 2 registration roller
O
O
16
Transport roller 2
O
O
17
Transport roller 3
O
O
18
Paper exit roller
O
O
19
No. 1 scanning plate
O
O
20
No. 2 scanning section
white reference glass
white reference glass
O
O
21
Discharge brush
X
X
Replacement reference:
When the brush bundle is remarkably deformed.
When the brush bundle is remarkably deformed.
22
OC mat
O
O
23
Sensors
X
X
For the reflection-type sensor, the other side
must be also cleaned.
must be also cleaned.
Drive unit
24
Gears
X
X
Apply to the specified position as needed when
checking. (UKOG-0299FCZZ)
checking. (UKOG-0299FCZZ)
25
Belts
-
X
Transport drive unit
26
Belts
-
X
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